المؤلفون: Abdalla, H., Adam, R., Aharonian, F., Benkhali, F. Ait, Anguner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V, Martins, V. Barbosa, Barnacka, A., Barnard, M., Becherini, Yvonne, Berge, D., Bernlohr, K., Bi, B., Bottcher, M., Boisson, C., Bolmont, J., Bonnefoy, S., de Lavergne, M. de Bony, Bregeon, J., Breuhaus, M., Brun, F., Brun, P., Bryan, M., Buchele, M., Bulik, T., Bylund, Tomas, Caroff, S., Carosi, A., Casanova, S., Chand, T., Chandra, S., Chen, A., Cotter, G., Mbarubucyeye, J. Damascene, Davids, I. D., Davies, J., Deil, C., Devin, J., DeWilt, P., Dirson, L., Djannati-Atai, A., Dmytriiev, A., Donath, A., Doroshenko, V, Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J-P, Feijen, K., Fegan, S., Fiasson, A., de Clairfontaine, G. Fichet, Filipovic, M., Fontaine, G., Funk, S., Fuling, M., Gabici, S., Gallant, Y. A., Giavitto, G., Giunti, L., Glawion, D., Glicenstein, J. F., Gottschall, D., Grondin, M-H, Hahn, J., Haupt, M., Hermann, G., Hinton, J. A., Hofmann, W., Hoischen, C., Holch, T. L., Holler, M., Horbe, M., Horns, D., Huber, D., Jamrozy, M., Jankowsky, D., Jankowsky, F., Jardin-Blicq, A., Joshi, V, Jung-Richardt, I, Kastendieck, M. A., Katarzynski, K., Katz, U., Khangulyan, D., Khelifi, B., Klepser, S., Kluzniak, W., Komin, Nu, Konno, R., Kosack, K., Kostunin, D., Kreter, M., Lamanna, G., Lemiere, A., Lemoine-Goumard, M., Lenain, J-P, Levy, C., Lohse, T., Lypova, I, Mackey, J., Majumdar, J., Malyshev, D., Marandon, V, Marchegiani, P., Marcowith, A., Mares, A., Marti-Devesa, G., Marx, R., Maurin, G., Meintjes, P. J., Meyer, M., Mitchell, A. M. W., Moderski, R., Mohamed, M., Mohrmann, L., Montanari, A., Moore, C., Morris, P., Moulin, E., Muller, J., Murach, T., Nakashima, K., Nayerhoda, A., de Naurois, M., Ndiyavala, H., Niederwanger, F., Niemiec, D., Oakes, L., O'Brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., Wilhelmi, E. de Ona, Ostrowski, M., Panter, M., Panny, S., Parsons, R. D., Peron, G., Peyaud, B., Piel, Q., Pita, S., Poireau, V, Noel, A. Priyana, Prokhorov, D. A., Prokoph, H., Puhlhofer, G., Punch, Michael, Quirrenbach, A., Raab, S., Rauth, R., Reichherzer, P., Reimer, A., Reimer, O., Remy, Q., Renaud, M., Rieger, F., Rinchiuso, L., Romoli, C., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V, Sailer, S., Sanchez, D. A., Santangelo, A., Sasaki, M., Scalici, M., Schussler, F., Schutte, H. M., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Senniappan, Mohanraj, Seyffert, A. S., Shafi, N., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., Sun, L., Steenkamp, R., Stegmann, C., Steinmassl, S., Steppa, C., Takahashi, T., Tavernier, T., Taylor, A. M., Terrier, R., Tiziani, D., Tluczykont, M., Tomankova, L., Trichard, C., Tsirou, M., Tuffs, R., Uchiyama, Y., van der Walt, D. J., van Eldik, C., van Rensburg, C., van Soelen, B., Vasileiadis, G., Veh, J., Venter, C., Vincent, P., Vink, J., Volk, H. J., Vuillaume, T., Wadiasingh, Z., Wagner, S. J., Watson, J., Werner, F., White, R., Wierzcholska, A., Wong, Yu W., Yusafzai, A., Zacharias, M., Zanin, R., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zorn, J., Zouari, S., Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. Arbet, Asano, K., Baack, D., Babic, A., Baquero, A., de Almeida, U. Barres, Barrio, J. A., Gonzalez, J. Becerra, Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Amico, G., D'Elia, V, Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Depaoli, D., Di Pierro, F., Di Venere, L., Espineira, E. Do Souto, Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Ramazani, V. Fallah, Fattorini, A., Ferrara, G., Foffano, L., Fonseca, M. , V, Font, L., Fruck, C., Fukami, S., Lopez, R. J. Garcia, Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., Fraga, B. Machado de Oliveira, Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Priyadarshi, C., Weaver, Z. R.

المصدر: Astronomy and Astrophysics. 648

مصطلحات موضوعية: radiation mechanisms: non-thermal, quasars: individual: PKS 1510-089, galaxies: active, relativistic processes, Astroparticle Physics, Astropartikelfysik

الوصف: The flat spectrum radio quasar (FSRQ) PKS 1510-089 is known for its complex multiwavelength behaviour and it is one of only a few FSRQs detected in very-high-energy (VHE, E>100 GeV) gamma rays. The VHE gamma -ray observations with H.E.S.S. and MAGIC in late May and early June 2016 resulted in the detection of an unprecedented flare, which revealed, for the first time, VHE gamma -ray intranight variability for this source. While a common variability timescale of 1.5 h has been found, there is a significant deviation near the end of the flare, with a timescale of similar to 20 min marking the cessation of the event. The peak flux is nearly two orders of magnitude above the low-level emission. For the first time, a curvature was detected in the VHE gamma -ray spectrum of PKS 1510-089, which can be fully explained by the absorption on the part of the extragalactic background light. Optical R-band observations with ATOM revealed a counterpart of the gamma -ray flare, even though the detailed flux evolution differs from the VHE gamma -ray light curve. Interestingly, a steep flux decrease was observed at the same time as the cessation of the VHE gamma -ray flare. In the high-energy (HE, E> 100 MeV) gamma -ray band, only a moderate flux increase was observed with Fermi-LAT, while the HE gamma -ray spectrum significantly hardens up to a photon index of 1.6. A search for broad-line region (BLR) absorption features in the gamma -ray spectrum indicates that the emission region is located outside of the BLR. Radio very-long-baseline interferometry observations reveal a fast-moving knot interacting with a standing jet feature around the time of the flare. As the standing feature is located similar to 50 pc from the black hole, the emission region of the flare may have been located at a significant distance from the black hole. If this is indeed a true correlation, the VHE gamma rays must have been produced far down in the jet, where turbulent plasma crosses a standing shock.

وصف الملف: print

الوصول الحر: https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-103706Test
https://doi.org/10.1051/0004-6361/202038949Test

المساهمون: Sievers, A.

المصدر: Astronomy and Astrophysics; 569

وصف الملف: Medium: ED; Size: Article No. A46

الوصول الحر: http://www.osti.gov/scitech/servlets/purl/1356441Test

المؤلفون: H. Abdalla, R. Adam, F. Aharonian, F. Ait Benkhali, E. O. Ang??ner, C. Arcaro, C. Armand, T. Armstrong, H. Ashkar, M. Backes, V. Baghmanyan, V. Barbosa Martins, A. Barnacka, M. Barnard, Y. Becherini, D. Berge, K. Bernl??hr, B. Bi, M. B??ttcher, C. Boisson, J. Bolmont, S. Bonnefoy, M. de Bony de Lavergne, J. Bregeon, M. Breuhaus, F. Brun, P. Brun, M. Bryan, M. B??chele, T. Bulik, T. Bylund, S. Caroff, A. Carosi, S. Casanova, T. Chand, S. Chandra, A. Chen, G. Cotter, M. Cury??o, J. Damascene Mbarubucyeye, I. D. Davids, J. Davies, C. Deil, J. Devin, P. deWilt, L. Dirson, A. Djannati-Ata?, A. Dmytriiev, A. Donath, V. Doroshenko, J. Dyks, K. Egberts, F. Eichhorn, S. Einecke, G. Emery, J. -P. Ernenwein, K. Feijen, S. Fegan, A. Fiasson, G. Fichet de Clairfontaine, M. Filipovic, G. Fontaine, S. Funk, M. F????ling, S. Gabici, Y. A. Gallant, G. Giavitto, L. Giunti, D. Glawion, J. F. Glicenstein, D. Gottschall, M. -H. Grondin, J. Hahn, M. Haupt, G. Hermann, J. A. Hinton, W. Hofmann, C. Hoischen, T. L. Holch, M. Holler, M. H??rbe, D. Horns, D. Huber, M. Jamrozy, D. Jankowsky, F. Jankowsky, A. Jardin-Blicq, V. Joshi, I. Jung-Richardt, M. A. Kastendieck, K. Katarzy??ski, U. Katz, D. Khangulyan, B. Kh??lifi, S. Klepser, W. Klu??niak, Nu. Komin, R. Konno, K. Kosack, D. Kostunin, M. Kreter, G. Lamanna, A. Lemi??re, M. Lemoine-Goumard, J. -P. Lenain, C. Levy, T. Lohse, I. Lypova, J. Mackey, J. Majumdar, D. Malyshev, V. Marandon, P. Marchegiani, A. Marcowith, A. Mares, G. Mart??-Devesa, R. Marx, G. Maurin, P. J. Meintjes, M. Meyer, A. M. W. Mitchell, R. Moderski, M. Mohamed, L. Mohrmann, A. Montanari, C. Moore, P. Morris, E. Moulin, J. Muller, T. Murach, K. Nakashima, A. Nayerhoda, M. de Naurois, H. Ndiyavala, F. Niederwanger, J. Niemiec, L. Oakes, P. O???Brien, H. Odaka, S. Ohm, L. Olivera-Nieto, E. de Ona Wilhelmi, M. Ostrowski, M. Panter, S. Panny, R. D. Parsons, G. Peron, B. Peyaud, Q. Piel, S. Pita, V. Poireau, A. Priyana Noel, D. A. Prokhorov, H. Prokoph, G. P??hlhofer, M. Punch, A. Quirrenbach, S. Raab, R. Rauth, P. Reichherzer, A. Reimer, O. Reimer, Q. Remy, M. Renaud, F. Rieger, L. Rinchiuso, C. Romoli, G. Rowell, B. Rudak, E. Ruiz-Velasco, V. Sahakian, S. Sailer, D. A. Sanchez, A. Santangelo, M. Sasaki, M. Scalici, F. Sch??ssler, H. M. Schutte, U. Schwanke, S. Schwemmer, M. Seglar-Arroyo, M. Senniappan, A. S. Seyffert, N. Shafi, K. Shiningayamwe, R. Simoni, A. Sinha, H. Sol, A. Specovius, S. Spencer, M. Spir-Jacob, Stawarz, L. Sun, R. Steenkamp, C. Stegmann, S. Steinmassl, C. Steppa, T. Takahashi, T. Tavernier, A. M. Taylor, R. Terrier, D. Tiziani, M. Tluczykont, L. Tomankova, C. Trichard, M. Tsirou, R. Tuffs, Y. Uchiyama, D. J. van der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis, J. Veh, C. Venter, P. Vincent, J. Vink, H. J. V??lk, T. Vuillaume, Z. Wadiasingh, S. J. Wagner, J. Watson, F. Werner, R. White, A. Wierzcholska, Yu. W. Wong, A. Yusafzai, M. Zacharias, R. Zanin, D. Zargaryan, A. A. Zdziarski, A. Zech, S. J. Zhu, J. Zorn, S. Zouari, N. ??ywucka, V. A. Acciari, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, K. Asano, D. Baack, A. Babi?, A. Baquero, U. Barres de Almeida, J. A. Barrio, J. Becerra Gonz??lez, W. Bednarek, L. Bellizzi, E. Bernardini, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Bo??njak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, S. M. Colak, U. Colin, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D???Amico, V. D???Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, D. Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espi??eira, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, V. Fallah Ramazani, A. Fattorini, G. Ferrara, L. Foffano, M. V. Fonseca, L. Font, C. Fruck, S. Fukami, R. J. Garc??a L??pez, M. Garczarczyk, S. Gasparyan, M. Gaug, N. Giglietto, F. Giordano, P. Gliwny, N. Godinovi?, D. Green, D. Hadasch, A. Hahn, L. Heckmann, J. Herrera, J. Hoang, D. Hrupec, M. H??tten, T. Inada, S. Inoue, K. Ishio, Y. Iwamura, L. Jouvin, Y. Kajiwara, M. Karjalainen, D. Kerszberg, Y. Kobayashi, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, S. Lombardi, F. Longo, M. L??pez, R. L??pez-Coto, A. L??pez-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Mart??nez, D. Mazin, S. Mender, S. Mi??anovi?, D. Miceli, T. Miener, M. Minev, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, D. Morcuende, V. Moreno, E. Moretti, P. Munar-Adrover, V. Neustroev, C. Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, S. Nozaki, Y. Ohtani, T. Oka, J. Otero-Santos, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, L. Pavleti?, P. Pe??il, C. Perennes, M. Persic, P. G. Prada Moroni, E. Prandini, C. Priyadarshi, I. Puljak, W. Rhode, M. Rib?, J. Rico, C. Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, B. Schleicher, K. Schmidt, T. Schweizer, J. Sitarek, I. ??nidari?, D. Sobczynska, A. Spolon, A. Stamerra, D. Strom, M. Strzys, Y. Suda, T. Suri?, M. Takahashi, F. Tavecchio, P. Temnikov, T. Terzi?, M. Teshima, N. Torres-Alb?, L. Tosti, S. Truzzi, J. van Scherpenberg, G. Vanzo, M. Vazquez Acosta, S. Ventura, V. Verguilov, C. F. Vigorito, V. Vitale, I. Vovk, M. Will, D. Zari?, S. G. Jorstad, A. P. Marscher, B. Boccardi, C. Casadio, J. Hodgson, J. -Y. Kim, T. P. Krichbaum, A. L??hteenm??ki, M. Tornikoski, E. Traianou, Z. R. Weaver

المساهمون: Abdalla, H., Adam, R., Aharonian, F., Ait Benkhali, F., Ang??ner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V., Barbosa Martins, V., Barnacka, A., Barnard, M., Becherini, Y., Berge, D., Bernl??hr, K., Bi, B., B??ttcher, M., Boisson, C., Bolmont, J., Bonnefoy, S., de Bony de Lavergne, M., Bregeon, J., Breuhaus, M., Brun, F., Brun, P., Bryan, M., B??chele, M., Bulik, T., Bylund, T., Caroff, S., Carosi, A., Casanova, S., Chand, T., Chandra, S., Chen, A., Cotter, G., Cury??o, M., Damascene Mbarubucyeye, J., Davids, I. D., Davies, J., Deil, C., Devin, J., Dewilt, P., Dirson, L., Djannati-Ata??, A., Dmytriiev, A., Donath, A., Doroshenko, V., Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J. -P., Feijen, K., Fegan, S., Fiasson, A., Fichet de Clairfontaine, G., Filipovic, M., Fontaine, G., Funk, S., F????ling, M., Gabici, S., Gallant, Y. A., Giavitto, G., Giunti, L., Glawion, D., Glicenstein, J. F., Gottschall, D., Grondin, M. -H., Hahn, J., Haupt, M., Hermann, G., Hinton, J. A., Hofmann, W., Hoischen, C., Holch, T. L., Holler, M., H??rbe, M., Horns, D., Huber, D., Jamrozy, M., Jankowsky, D., Jankowsky, F., Jardin-Blicq, A., Joshi, V., Jung-Richardt, I., Kastendieck, M. A., Katarzy??ski, K., Katz, U., Khangulyan, D., Kh??lifi, B., Klepser, S., Klu??niak, W., Komin, Nu., Konno, R., Kosack, K., Kostunin, D.

مصطلحات موضوعية: radiation mechanisms: non-thermal, quasars: individual: PKS 1510-089, galaxies: active, relativistic processes

الوصف: The flat spectrum radio quasar (FSRQ) PKS 1510-089 is known for its complex multiwavelength behaviour and it is one of only a few FSRQs detected in very-high-energy (VHE, E>100 GeV) gamma rays. The VHE gamma -ray observations with H.E.S.S. and MAGIC in late May and early June 2016 resulted in the detection of an unprecedented flare, which revealed, for the first time, VHE gamma -ray intranight variability for this source. While a common variability timescale of 1.5 h has been found, there is a significant deviation near the end of the flare, with a timescale of similar to 20 min marking the cessation of the event. The peak flux is nearly two orders of magnitude above the low-level emission. For the first time, a curvature was detected in the VHE gamma -ray spectrum of PKS 1510-089, which can be fully explained by the absorption on the part of the extragalactic background light. Optical R-band observations with ATOM revealed a counterpart of the gamma -ray flare, even though the detailed flux evolution differs from the VHE gamma -ray light curve. Interestingly, a steep flux decrease was observed at the same time as the cessation of the VHE gamma -ray flare. In the high-energy (HE, E> 100 MeV) gamma -ray band, only a moderate flux increase was observed with Fermi-LAT, while the HE gamma -ray spectrum significantly hardens up to a photon index of 1.6. A search for broad-line region (BLR) absorption features in the gamma -ray spectrum indicates that the emission region is located outside of the BLR. Radio very-long-baseline interferometry observations reveal a fast-moving knot interacting with a standing jet feature around the time of the flare. As the standing feature is located similar to 50 pc from the black hole, the emission region of the flare may have been located at a significant distance from the black hole. If this is indeed a true correlation, the VHE gamma rays must have been produced far down in the jet, where turbulent plasma crosses a standing shock.

العلاقة: info:eu-repo/semantics/altIdentifier/wos/WOS:000638124500009; volume:648; firstpage:A23-1; lastpage:A23-22; numberofpages:22; journal:ASTRONOMY & ASTROPHYSICS; http://hdl.handle.net/11368/3029211Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85104001652

الإتاحة: https://doi.org/10.1051/0004-6361/202038949Test
http://hdl.handle.net/11368/3029211Test

المؤلفون: Abdalla, H. (H.), Adam, R. (R.), Aharonian, F. (F.), Benkhali, F. A. (F. Ait), Anguner, E. O. (E. O.), Arcaro, C. (C.), Armand, C. (C.), Armstrong, T. (T.), Ashkar, H. (H.), Backes, M. (M.), Baghmanyan, V. (V), Martins, V. B. (V. Barbosa), Barnacka, A. (A.), Barnard, M. (M.), Becherini, Y. (Y.), Berge, D. (D.), Bernlohr, K. (K.), Bi, B. (B.), Bottcher, M. (M.), Boisson, C. (C.), Bolmont, J. (J.), Bonnefoy, S. (S.), de Lavergne, M. d. (M. de Bony), Bregeon, J. (J.), Breuhaus, M. (M.), Brun, F. (F.), Brun, P. (P.), Bryan, M. (M.), Buchele, M. (M.), Bulik, T. (T.), Bylund, T. (T.), Caroff, S. (S.), Carosi, A. (A.), Casanova, S. (S.), Chand, T. (T.), Chandra, S. (S.), Chen, A. (A.), Cotter, G. (G.), Mbarubucyeye, J. D. (J. Damascene), Davids, I. D. (I. D.), Davies, J. (J.), Deil, C. (C.), Devin, J. (J.), DeWilt, P. (P.), Dirson, L. (L.), Djannati-Atai, A. (A.), Dmytriiev, A. (A.), Donath, A. (A.), Doroshenko, V. (V), Dyks, J. (J.), Egberts, K. (K.), Eichhorn, F. (F.), Einecke, S. (S.), Emery, G. (G.), Ernenwein, J.-P. (J-P), Feijen, K. (K.), Fegan, S. (S.), Fiasson, A. (A.), de Clairfontaine, G. F. (G. Fichet), Filipovic, M. (M.), Fontaine, G. (G.), Funk, S. (S.), Fuling, M. (M.), Gabici, S. (S.), Gallant, Y. A. (Y. A.), Giavitto, G. (G.), Giunti, L. (L.), Glawion, D. (D.), Glicenstein, J. F. (J. F.), Gottschall, D. (D.), Grondin, M.-H. (M-H), Hahn, J. (J.), Haupt, M. (M.), Hermann, G. (G.), Hinton, J. A. (J. A.), Hofmann, W. (W.), Hoischen, C. (C.), Holch, T. L. (T. L.), Holler, M. (M.), Horbe, M. (M.), Horns, D. (D.), Huber, D. (D.), Jamrozy, M. (M.), Jankowsky, D. (D.), Jankowsky, F. (F.), Jardin-Blicq, A. (A.), Joshi, V. (V), Jung-Richardt, I. (I), Kastendieck, M. A. (M. A.), Katarzynski, K. (K.), Katz, U. (U.), Khangulyan, D. (D.), Khelifi, B. (B.), Klepser, S. (S.), Kluzniak, W. (W.), Komin, N. (Nu), Konno, R. (R.), Kosack, K. (K.), Kostunin, D. (D.), Kreter, M. (M.), Lamanna, G. (G.), Lemiere, A. (A.), Lemoine-Goumard, M. (M.), Lenain, J.-P. (J-P), Levy, C. (C.), Lohse, T. (T.), Lypova, I. (I), Mackey, J. (J.), Majumdar, J. (J.), Malyshev, D. (D.), Marandon, V. (V), Marchegiani, P. (P.), Marcowith, A. (A.), Mares, A. (A.), Marti-Devesa, G. (G.), Marx, R. (R.), Maurin, G. (G.), Meintjes, P. J. (P. J.), Meyer, M. (M.), Mitchell, A. M. (A. M. W.), Moderski, R. (R.), Mohamed, M. (M.), Mohrmann, L. (L.), Montanari, A. (A.), Moore, C. (C.), Morris, P. (P.), Moulin, E. (E.), Muller, J. (J.), Murach, T. (T.), Nakashima, K. (K.), Nayerhoda, A. (A.), de Naurois, M. (M.), Ndiyavala, H. (H.), Niederwanger, F. (F.), Niemiec, D. (D.), Oakes, L. (L.), O'Brien, P. (P.), Odaka, H. (H.), Ohm, S. (S.), Olivera-Nieto, L. (L.), Wilhelmi, E. d. (E. de Ona), Ostrowski, M. (M.), Panter, M. (M.), Panny, S. (S.), Parsons, R. D. (R. D.), Peron, G. (G.), Peyaud, B. (B.), Piel, Q. (Q.), Pita, S. (S.), Poireau, V. (V), Noel, A. P. (A. Priyana), Prokhorov, D. A. (D. A.), Prokoph, H. (H.), Puhlhofer, G. (G.), Punch, M. (M.), Quirrenbach, A. (A.), Raab, S. (S.), Rauth, R. (R.), Reichherzer, P. (P.), Reimer, A. (A.), Reimer, O. (O.), Remy, Q. (Q.), Renaud, M. (M.), Rieger, F. (F.), Rinchiuso, L. (L.), Romoli, C. (C.), Rowell, G. (G.), Rudak, B. (B.), Ruiz-Velasco, E. (E.), Sahakian, V. (V), Sailer, S. (S.), Sanchez, D. A. (D. A.), Santangelo, A. (A.), Sasaki, M. (M.), Scalici, M. (M.), Schussler, F. (F.), Schutte, H. M. (H. M.), Schwanke, U. (U.), Schwemmer, S. (S.), Seglar-Arroyo, M. (M.), Senniappan, M. (M.), Seyffert, A. S. (A. S.), Shafi, N. (N.), Shiningayamwe, K. (K.), Simoni, R. (R.), Sinha, A. (A.), Sol, H. (H.), Specovius, A. (A.), Spencer, S. (S.), Sun, L. (L.), Steenkamp, R. (R.), Stegmann, C. (C.), Steinmassl, S. (S.), Steppa, C. (C.), Takahashi, T. (T.), Tavernier, T. (T.), Taylor, A. M. (A. M.), Terrier, R. (R.), Tiziani, D. (D.), Tluczykont, M. (M.), Tomankova, L. (L.), Trichard, C. (C.), Tsirou, M. (M.), Tuffs, R. (R.), Uchiyama, Y. (Y.), van der Walt, D. J. (D. J.), van Eldik, C. (C.), van Rensburg, C. (C.), van Soelen, B. (B.), Vasileiadis, G. (G.), Veh, J. (J.), Venter, C. (C.), Vincent, P. (P.), Vink, J. (J.), Volk, H. J. (H. J.), Vuillaume, T. (T.), Wadiasingh, Z. (Z.), Wagner, S. J. (S. J.), Watson, J. (J.), Werner, F. (F.), White, R. (R.), Wierzcholska, A. (A.), Wong, Y. W. (Yu W.), Yusafzai, A. (A.), Zacharias, M. (M.), Zanin, R. (R.), Zargaryan, D. (D.), Zdziarski, A. A. (A. A.), Zech, A. (A.), Zhu, S. J. (S. J.), Zorn, J. (J.), Zouari, S. (S.), Acciari, V. A. (V. A.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Engels, A. A. (A. Arbet), Asano, K. (K.), Baack, D. (D.), Babic, A. (A.), Baquero, A. (A.), de Almeida, U. B. (U. Barres), Barrio, J. A. (J. A.), Gonzalez, J. B. (J. Becerra), Bednarek, W. (W.), Bellizzi, L. (L.), Bernardini, E. (E.), Berti, A. (A.), Besenrieder, J. (J.), Bhattacharyya, W. (W.), Bigongiari, C. (C.), Biland, A. (A.), Blanch, O. (O.), Bonnoli, G. (G.), Busetto, G. (G.), Carosi, R. (R.), Ceribella, G. (G.), Cerruti, M. (M.), Chai, Y. (Y.), Chilingarian, A. (A.), Cikota, S. (S.), Colak, S. M. (S. M.), Colin, U. (U.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), D'Amico, G. (G.), D'Elia, V. (V), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Depaoli, D. (D.), Di Pierro, F. (F.), Di Venere, L. (L.), Espineira, E. D. (E. Do Souto), Prester, D. D. (D. Dominis), Donini, A. (A.), Dorner, D. (D.), Doro, M. (M.), Elsaesser, D. (D.), Ramazani, V. F. (V. Fallah), Fattorini, A. (A.), Ferrara, G. (G.), Foffano, L. (L.), Fonseca, M. V. (M., V), Font, L. (L.), Fruck, C. (C.), Fukami, S. (S.), Lopez, R. J. (R. J. Garcia), Garczarczyk, M. (M.), Gasparyan, S. (S.), Gaug, M. (M.), Giglietto, N. (N.), Giordano, F. (F.), Gliwny, P. (P.), Godinovic, N. (N.), Green, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Heckmann, L. (L.), Herrera, J. (J.), Hoang, J. (J.), Hrupec, D. (D.), Hutten, M. (M.), Inada, T. (T.), Inoue, S. 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(D.), Jorstad, S. G. (S. G.), Marscher, A. P. (A. P.), Boccardi, B. (B.), Casadio, C. (C.), Hodgson, J. (J.), Kim, J.-Y. (J-Y), Krichbaum, T. P. (T. P.), Lahteenmaki, A. (A.), Tornikoski, M. (M.), Traianou, E. (E.), Weaver, Z. R. (Z. R.)

مصطلحات موضوعية: galaxies: active, quasars: individual: PKS 1510-089, radiation mechanisms: non-thermal, relativistic processes

الوصف: The flat spectrum radio quasar (FSRQ) PKS 1510−089 is known for its complex multiwavelength behaviour and it is one of only a few FSRQs detected in very-high-energy (VHE, E > 100 GeV) γ rays. The VHE γ-ray observations with H.E.S.S. and MAGIC in late May and early June 2016 resulted in the detection of an unprecedented flare, which revealed, for the first time, VHE γ-ray intranight variability for this source. While a common variability timescale of 1.5 h has been found, there is a significant deviation near the end of the flare, with a timescale of ∼20 min marking the cessation of the event. The peak flux is nearly two orders of magnitude above the low-level emission. For the first time, a curvature was detected in the VHE γ-ray spectrum of PKS 1510–089, which can be fully explained by the absorption on the part of the extragalactic background light. Optical R-band observations with ATOM revealed a counterpart of the γ-ray flare, even though the detailed flux evolution differs from the VHE γ-ray light curve. Interestingly, a steep flux decrease was observed at the same time as the cessation of the VHE γ-ray flare. In the high-energy (HE, E > 100 MeV) γ-ray band, only a moderate flux increase was observed with Fermi-LAT, while the HE γ-ray spectrum significantly hardens up to a photon index of 1.6. A search for broad-line region (BLR) absorption features in the γ-ray spectrum indicates that the emission region is located outside of the BLR. Radio very-long-baseline interferometry observations reveal a fast-moving knot interacting with a standing jet feature around the time of the flare. As the standing feature is located ∼50 pc from the black hole, the emission region of the flare may have been located at a significant distance from the black hole. If this is indeed a true correlation, the VHE γ rays must have been produced far down in the jet, where turbulent plasma crosses a standing shock.

وصف الملف: application/pdf

الإتاحة: http://urn.fi/urn:nbn:fi-fe2021070641186Test

المؤلفون: MAGIC Collaboration

المساهمون: Metsähovi Radio Observatory, Department of Electronics and Nanoengineering, Anne Lähteenmäki Group, Aalto-yliopisto, Aalto University

مصطلحات موضوعية: Galaxies: Active, Quasars: Individual: Pks 1510-089, Radiation mechanisms: Non-thermal, Relativistic processes

الوصف: The flat spectrum radio quasar (FSRQ) PKS 1510-089 is known for its complex multiwavelength behaviour and it is one of only a few FSRQs detected in very-high-energy (VHE, E> 100 GeV) γ rays. The VHE γ-ray observations with H.E.S.S. and MAGIC in late May and early June 2016 resulted in the detection of an unprecedented flare, which revealed, for the first time, VHE γ-ray intranight variability for this source. While a common variability timescale of 1.5 h has been found, there is a significant deviation near the end of the flare, with a timescale of ∼20 min marking the cessation of the event. The peak flux is nearly two orders of magnitude above the low-level emission. For the first time, a curvature was detected in the VHE γ-ray spectrum of PKS 1510-089, which can be fully explained by the absorption on the part of the extragalactic background light. Optical R-band observations with ATOM revealed a counterpart of the γ-ray flare, even though the detailed flux evolution differs from the VHE γ-ray light curve. Interestingly, a steep flux decrease was observed at the same time as the cessation of the VHE γ-ray flare. In the high-energy (HE, E> 100 MeV) γ-ray band, only a moderate flux increase was observed with Fermi-LAT, while the HE γ-ray spectrum significantly hardens up to a photon index of 1.6. A search for broad-line region (BLR) absorption features in the γ-ray spectrum indicates that the emission region is located outside of the BLR. Radio very-long-baseline interferometry observations reveal a fast-moving knot interacting with a standing jet feature around the time of the flare. As the standing feature is located ∼50 pc from the black hole, the emission region of the flare may have been located at a significant distance from the black hole. If this is indeed a true correlation, the VHE γ rays must have been produced far down in the jet, where turbulent plasma crosses a standing shock. ; Peer reviewed

وصف الملف: application/pdf

العلاقة: Astronomy and Astrophysics; Volume 648; MAGIC Collaboration 2021, ' H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ -ray flare in PKS 1510-089 in May 2016 ', Astronomy and Astrophysics, vol. 648, A23 . https://doi.org/10.1051/0004-6361/202038949Test; PURE UUID: 46b23dc6-dbcd-4c0d-bd55-0ea4848a42f3; PURE ITEMURL: https://research.aalto.fi/en/publications/46b23dc6-dbcd-4c0d-bd55-0ea4848a42f3Test; PURE LINK: http://www.scopus.com/inward/record.url?scp=85104001652&partnerID=8YFLogxKTest; PURE FILEURL: https://research.aalto.fi/files/62232263/Abdalla_Hess_magic_collaboration.pdfTest; https://aaltodoc.aalto.fi/handle/123456789/107104Test; URN:NBN:fi:aalto-202104286388

الإتاحة: https://doi.org/10.1051/0004-6361/202038949Test
https://aaltodoc.aalto.fi/handle/123456789/107104Test

المؤلفون: Abdo, A. A., Ackermann, M., Agudo, I., Ajello, M., Allafort, A., Aller, H. D., Aller, M. F., Antolini, E., Arkharov, A. A., Axelsson, Magnus, Bach, U., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berdyugin, A., Berenji, B., Blandford, R. D., Blinov, D. A., Bloom, E. D., Boettcher, M., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Buemi, C. S., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Carosati, D., Carrigan, S., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Celik, Oe, Chekhtman, A., Chen, W. P., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Corbel, S., Costamante, L., Dermer, C. D., de Angelis, A., de Palma, F., Donato, D., do Couto e Silva, E., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Forne, E., Fortin, P., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Gurwell, M. A., Gusbar, C., Gomez, J. L., Hadasch, D., Hagen-Thorn, V. A., Hayashida, M., Hays, E., Horan, D., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kimeridze, G., Knoedlseder, J., Konstantinova, T. S., Kopatskaya, E. N., Koptelova, E., Kovalev, Y. Y., Kurtanidze, O. M., Kuss, M., Lahteenmaki, A., Lande, J., Larionov, V. M., Larionova, E. G., Larionova, L. V., Larsson, S., Latronico, L., Lee, S. -H, Leto, P., Lister, M. L., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Massaro, E., Mazziotta, M. N., McConville, W., McEnery, J. E., McHardy, I. M., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morozova, D. A., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Nikolashvili, M. G., Nolan, P. L., Norris, J. P., Nuss, E., Ohno, M., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Ozaki, M., Paneque, D., Panetta, J. H., Parent, D., Pasanen, M., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Pushkarev, A. B., Raino, S., Raiteri, C. M., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reinthal, R., Ripken, J., Ritz, S., Roca-Sogorb, M., Rodriguez, A. Y., Roth, M., Roustazadeh, P., Ryde, Felix, Sadrozinski, H. F. -W, Sander, A., Scargle, J. D., Sgro, C., Sigua, L. A., Smith, P. D., Sokolovsky, K., Spandre, G., Spinelli, P., Starck, J. -L, Strickman, M. S., Suson, D. J., Takahashi, H., Takahashi, T., Takalo, L. O., Tanaka, T., Taylor, B., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tornikoski, M., Torres, D. F., Tosti, G., Tramacere, A., Trigilio, C., Troitsky, I. S., Umana, G., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vilchez, N., Villata, M., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Z., Ylinen, Tomi, Ziegler, M.

المصدر: Astrophysical Journal. 721(2):1425-1447

مصطلحات موضوعية: galaxies: active, galaxies: jets, gamma rays: galaxies, quasars: individual (PKS 1510-089), NATURAL SCIENCES, Physics, Astronomy and astrophysics, NATURVETENSKAP, Fysik, Astronomi och astrofysik

الوصف: We report on the multi-wavelength observations of PKS 1510-089 (a flat spectrum radio quasar (FSRQ) at z = 0.361) during its high activity period between 2008 September and 2009 June. During this 11 month period, the source was characterized by a complex variability at optical, UV, and gamma-ray bands, on timescales down to 6-12 hr. The brightest gamma-ray isotropic luminosity, recorded on 2009 March 26, was similar or equal to 2 x 1048 erg s-1. The spectrum in the Fermi Large Area Telescope energy range shows a mild curvature described well by a log-parabolic law, and can be understood as due to the Klein-Nishina effect. The. -ray flux has a complex correlation with the other wavelengths. There is no correlation at all with the X-ray band, a weak correlation with the UV, and a significant correlation with the optical flux. The. -ray flux seems to lead the optical one by about 13 days. From the UV photometry, we estimated a black hole mass of similar or equal to 5.4 x 10(8)M(circle dot) and an accretion rate of similar or equal to 0.5M(circle dot) yr(-1). Although the power in the thermal and non-thermal outputs is smaller compared to the very luminous and distant FSRQs, PKS 1510-089 exhibits a quite large Compton dominance and a prominent big blue bump (BBB) as observed in the most powerful gamma-ray quasars. The BBB was still prominent during the historical maximum optical state in 2009 May, but the optical/ UV spectral index was softer than in the quiescent state. This seems to indicate that the BBB was not completely dominated by the synchrotron emission during the highest optical state. We model the broadband spectrum assuming a leptonic scenario in which the inverse Compton emission is dominated by the scattering of soft photons produced externally to the jet. The resulting model-dependent jet energetic content is compatible with a scenario in which the jet is powered by the accretion disk, with a total efficiency within the Kerr black hole limit.

وصف الملف: print

الوصول الحر: https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-26668Test
https://doi.org/10.1088/0004-637X/721/2/1425Test

المؤلفون: Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Cikota, S., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., DI Pierro, F., Do Souto Espiñera, E., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Kubo, H., Kushida, J., Kuveždić, D., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., López-Oramas, A., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Somero, A., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Becerra González, J., Raiteri, C. M., Sandrinelli, A., Hovatta, T., Kiehlmann, S., Max-Moerbeck, W., Tornikoski, M., Lähteenmäki, A., Tammi, J., Ramakrishnan, V., Thum, C., Agudo, I., Molina, S. N., Gómez, J. L., Fuentes, A., Casadio, C., Traianou, E., Myserlis, I., Kim, J. -Y.

المساهمون: Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Cikota, S., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., DI Pierro, F., Do Souto Espiñera, E., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Kubo, H., Kushida, J., Kuveždić, D., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., López-Oramas, A., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Moreno, V., Moretti, E., Munar-Adrover, P.

مصطلحات موضوعية: Galaxies: active, Galaxies: jet, Gamma rays: galaxie, Quasars: individual: PKS 1510-089, Astronomy and Astrophysic, Space and Planetary Science

الوصف: Context. PKS 1510-089 is a flat spectrum radio quasar strongly variable in the optical and GeV range. To date, very high-energy (VHE, > 100 GeV) emission has been observed from this source either during long high states of optical and GeV activity or during short flares. Aims. We search for low-state VHE gamma-ray emission from PKS 1510-089. We characterize and model the source in a broadband context, which would provide a baseline over which high states and flares could be better understood. Methods. PKS 1510-089 has been monitored by the MAGIC telescopes since 2012. We use daily binned Fermi-LAT flux measurements of PKS 1510-089 to characterize the GeV emission and select the observation periods of MAGIC during low state of activity. For the selected times we compute the average radio, IR, optical, UV, X-ray, and gamma-ray emission to construct a low-state spectral energy distribution of the source. The broadband emission is modeled within an external Compton scenario with a stationary emission region through which plasma and magnetic fields are flowing. We also perform the emission-model-independent calculations of the maximum absorption in the broad line region (BLR) using two different models. Results. The MAGIC telescopes collected 75 hr of data during times when the Fermi-LAT flux measured above 1 GeV was below 3? × 10-8? cm-2? s-1, which is the threshold adopted for the definition of a low gamma-ray activity state. The data show a strongly significant (9.5σ) VHE gamma-ray emission at the level of (4.27 ± 0.61stat) × 10-12? cm-2? s-1 above 150 GeV, a factor of 80 lower than the highest flare observed so far from this object. Despite the lower flux, the spectral shape is consistent with earlier detections in the VHE band. The broadband emission is compatible with the external Compton scenario assuming a large emission region located beyond the BLR. For the first time the gamma-ray data allow us to place a limit on the location of the emission region during a low gamma-ray state of a FSRQ. For the used ...

العلاقة: info:eu-repo/semantics/altIdentifier/wos/WOS:000450611800007; volume:619; numberofpages:11; journal:ASTRONOMY & ASTROPHYSICS; http://hdl.handle.net/11568/938577Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85057390485; https://www.aanda.org/articles/aa/full_html/2018/11/aa33618-18/aa33618-18.htmlTest

الإتاحة: https://doi.org/10.1051/0004-6361/201833618Test
http://hdl.handle.net/11568/938577Test
https://www.aanda.org/articles/aa/full_html/2018/11/aa33618-18/aa33618-18.htmlTest

المؤلفون: MAGIC Collaboration, Acciari, V.A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babi¿, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Ramakrishnan, V., Fernández-Barral, A., Thum, C., Agudo, Iván, Nievas Rosillo, M., de Angelis, A., de Lotto, B., Molina, Sol, Mirzoyan, R., Godinović, N., Longo, F., Myserlis, I., García López, R.J., Neustroev, V., Kim, J. -Y., Majumdar, P., Inoue, S., Biland, A., Guberman, D., Blanch, O., Bonnoli, G., Prada Moroni, P. G., Ferrara, G., Fidalgo, D., Carosi, R., Palacio, J., Kuveždi¿, D., Colombo, E., Ishio, K., Peresano, M., Contreras, J.L., Miranda, J. M., López, M., Delfino, M., Lamastra, A., Delgado, J., di Pierro, F., Hadasch, D., Hahn, A., Munar-Adrover, P., Righi, C., Maneva, G., Doro, M., López-Oramas, A., Schweizer, T., Einecke, S., Paiano, S., Foffano, L., Manganaro, M., Fonseca, M.V., Font, L., Lelas, D., Leone, F., Peñil, P., Berti, A., Molina, E., Garczarczyk, M., Tsujimoto, S., Niedzwiecki, A., Rico, J., Hassan, T., Moralejo, A., Herrera, J., Hoang, J., Mannheim, K., Nilsson, K., Satalecka, K., Paneque, D., Iwamura, Y., Hovatta, T., Persic, M., Tavecchio, F., Lindfors, E., Paoletti, R., Nigro, C., Lombardi, S., Ninci, D., Torres-Albà, N., Rugliancich, A., Maggio, C., Fuentes, A., Sitarek, J., Zari¿, D., Maraschi, L., Saha, L., Bednarek, W., Mariotti, M., Sandrinelli, A., Temnikov, P., Martínez, M., Šnidari¿, I., Masuda, S., Mazin, D., Da Vela, Paolo, Prandini, E., Puljak, I., Minev, M., Cikota, S., van Scherpenberg, J., Moreno, Vicente, Terzi¿, T., Covino, S., Moretti, E., Gómez Fernández, J. L., Fermi-LAT Collaboration, Nishijima, K., Vanzo, G., Noda, K., Nogués, L., Sobczynska, D., Somero, A., Barrio, J. A., Domínguez, A., Kiehlmann, S., Paredes, J. M., Becerra González, J., Fallah Ramazani, V., Pedaletti, G., Ceribella, G., García, J. R, Max-Moerbeck, W., Rhode, W., Ribó, M., Vázquez Acosta, M., Vovk, I., Cortina, J., Galindo, D., Casadio, C., Saito, T., Giammaria, P., Bernardini, E., Do Souto Espiñera, E., Stamerra, A., Traianou, E., Strzys, M., Suri¿, T., Tornikoski, M., Bhattacharyya, W., Elsaesser, D., Colak, S.M., Teshima, M., Kushida, J., D'Elia, V., Fruck, C., Ward, J. E., Colin, P., Besenrieder, J., Will, M., Bigongiari, C., Gaug, M., Dominis Prester, D., Raiteri, C. M., Makariev, M., Fattorini, A., Hrupec, D., Lähteenmäki, A., Dorner, D., Dazzi, F., Tammi, J., Kubo, H., Gallozzi, S.

المساهمون: Federal Ministry of Education and Research (Germany), Max Planck Society, Ministerio de Economía y Competitividad (España), Swiss National Science Foundation, Junta de Andalucía

مصطلحات موضوعية: Galaxies: active, Galaxies: jets, Quasars: individual: PKS 1510-089, Gamma rays: galaxies

الوصف: PKS 1510-089 is a flat spectrum radio quasar strongly variable in the optical and GeV range. To date, very high-energy (VHE, > 100 GeV) emission has been observed from this source either during long high states of optical and GeV activity or during short flares. Aims. We search for low-state VHE gamma-ray emission from PKS 1510-089. We characterize and model the source in a broadband context, which would provide a baseline over which high states and flares could be better understood. Methods. PKS 1510-089 has been monitored by the MAGIC telescopes since 2012. We use daily binned Fermi-LAT flux measurements of PKS 1510-089 to characterize the GeV emission and select the observation periods of MAGIC during low state of activity. For the selected times we compute the average radio, IR, optical, UV, X-ray, and gamma-ray emission to construct a low-state spectral energy distribution of the source. The broadband emission is modeled within an external Compton scenario with a stationary emission region through which plasma and magnetic fields are flowing. We also perform the emission-model-independent calculations of the maximum absorption in the broad line region (BLR) using two different models. Results. The MAGIC telescopes collected 75 hr of data during times when the Fermi-LAT flux measured above 1 GeV was below 3? × 10 -8 ? cm -2 ? s -1 , which is the threshold adopted for the definition of a low gamma-ray activity state. The data show a strongly significant (9.5¿) VHE gamma-ray emission at the level of (4.27 ± 0.61 stat ) × 10 -12 ? cm -2 ? s -1 above 150 GeV, a factor of 80 lower than the highest flare observed so far from this object. Despite the lower flux, the spectral shape is consistent with earlier detections in the VHE band. The broadband emission is compatible with the external Compton scenario assuming a large emission region located beyond the BLR. For the first time the gamma-ray data allow us to place a limit on the location of the emission region during a low gamma-ray state of a FSRQ. For the ...

العلاقة: #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2015-69818-P; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2015-68378-P; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2015-69210-C6-2-R; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2015-69210-C6-4-R; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2015-69210-C6-6-R; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-76012-C3-1-P; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2015-71662-C2-2-P; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-40825-P; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-80889-P; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0548; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MDM-2014-0369; Publisher's version; Sí; Astronomy and Astrophysics 619: A159 (2018); http://hdl.handle.net/10261/178733Test; http://dx.doi.org/10.13039/501100003329Test; http://dx.doi.org/10.13039/501100004189Test; http://dx.doi.org/10.13039/501100002347Test; http://dx.doi.org/10.13039/501100011011Test

الإتاحة: https://doi.org/10.1051/0004-6361/201833618Test
https://doi.org/10.13039/501100003329Test
https://doi.org/10.13039/501100004189Test
https://doi.org/10.13039/501100002347Test
https://doi.org/10.13039/501100011011Test
http://hdl.handle.net/10261/178733Test

المؤلفون: Tornikoski, Merja, Lähteenmäki, Anne, Tammi, Joni, Ramakrishnan, Venkatessh, MAGIC Collaboration, Fermi Large Area Telescope Collaboration

المساهمون: Metsähovi Radio Observatory, Department of Electronics and Nanoengineering, Anne Lähteenmäki Group, Aalto-yliopisto, Aalto University

مصطلحات موضوعية: Galaxies: active, Galaxies: jets, Gamma rays: galaxies, Quasars: individual: PKS 1510-089

الوصف: PKS 1510-089 is a flat spectrum radio quasar strongly variable in the optical and GeV range. We search for low-state VHE gamma-ray emission from PKS 1510-089. We aim to characterize and model the source in a broad-band context, which would provide a baseline over which high states and flares could be better understood. We use daily binned Fermi-LAT flux measurements of PKS 1510-089 to characterize the GeV emission and select the observation periods of MAGIC during low state of activity. For the selected times we compute the average radio, IR, optical, UV, X-ray and gamma-ray emission to construct a low-state spectral energy distribution of the source. The broadband emission is modelled within an External Compton scenario with a stationary emission region through which plasma and magnetic field are flowing. We perform also the emission-model-independent calculations of the maximum absorption in the broad line region (BLR) using two different models. Results. The MAGIC telescopes collected 75 hrs of data during times when the Fermi-LAT flux measured above 1 GeV was below 3x10-8cm-2s-1, which is the threshold adopted for the definition of a low gamma-ray activity state. The data show a strongly significant (9.5{\sigma}) VHE gamma-ray emission at the level of (4.27+-0.61stat)x10-12cm-2s-1 above 150GeV, a factor 80 smaller than the highest flare observed so far from this object. Despite the lower flux, the spectral shape is consistent with earlier detections in the VHE band. The broad-band emission is compatible with the EC scenario assuming a large emission region located beyond the BLR. For the first time the gamma-ray data allow us to place a limit on the location of the emission region during a low gamma-ray state of a FSRQ. For the used model of the BLR, the 95% C.L. on the location of the emission region allows us to place it at the distance >74% of the outer radius of the BLR. ; Peer reviewed

وصف الملف: application/pdf

العلاقة: Astronomy and Astrophysics; Volume 619; Tornikoski, M, Lähteenmäki, A, Tammi, J, Ramakrishnan, V, MAGIC Collaboration & Fermi Large Area Telescope Collaboration 2018, ' Detection of persistent VHE gamma-ray emission from PKS 1510-089 by the MAGIC telescopes during low states between 2012 and 2017 ', Astronomy and Astrophysics, vol. 619, A159 . https://doi.org/10.1051/0004-6361/201833618Test; PURE UUID: 4ae73d03-a01d-42da-be61-680d0e2bba3d; PURE ITEMURL: https://research.aalto.fi/en/publications/4ae73d03-a01d-42da-be61-680d0e2bba3dTest; PURE FILEURL: https://research.aalto.fi/files/30360429/ELEC_magic_collaboration_detection_of_persistent_AandA.pdfTest; https://aaltodoc.aalto.fi/handle/123456789/35651Test; URN:NBN:fi:aalto-201812216660

الإتاحة: https://doi.org/10.1051/0004-6361/201833618Test
https://aaltodoc.aalto.fi/handle/123456789/35651Test

المؤلفون: Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babić, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Bednarek, W., Bernardini, E., Berti, A., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carosi, R., Carosi, A., Chatterjee, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., De Oña Wilhelmi, E., Di Pierro, F., Doert, M., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martí­nez, M., Mazin, D., Menzel, U., Mirzoyan, R., Moralejo, A., Moretti, E., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Poutanen, J., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Shore, S. N., Sillanpää, A., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres, D. F., Torres-Albà , N., Toyama, T., Treves, A., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Wu, M. H., Zarić, D., Desiante, R., Becerra González, J., D'Ammando, F., Larsson, S., Raiteri, C. M., Reinthal, R., Lähteenmäki, A., Järvelä, E., Tornikoski, M., Ramakrishnan, V., Jorstad, S. G., Marscher, A. P., Bala, V., Macdonald, N. R., Kaur, N., Sameer, Null, Baliyan, K., Acosta-Pulido, J. A., Lazaro, C., Martí-nez-Lombilla, C., Grinon-Marin, A. B., Pastor Yabar, A., Protasio, C., Carnerero, M. I., Jermak, H., Steele, I. A., Larionov, V. M., Borman, G. A., Grishina, T. S.

المساهمون: Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babić, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Bednarek, W., Bernardini, E., Berti, A., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carosi, R., Carosi, A., Chatterjee, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., De Oña Wilhelmi, E., Di Pierro, F., Doert, M., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martí­nez, M., Mazin, D., Menzel, U., Mirzoyan, R., Moralejo, A., Moretti, E., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Palatiello, M., Paneque, D.

مصطلحات موضوعية: Galaxies: active, Galaxies: jet, Gamma rays: galaxie, Quasars: individual: PKS 1510-089, Astronomy and Astrophysic, Space and Planetary Science

الوصف: Context. PKS 1510-089 is one of only a few flat spectrum radio quasars detected in the very-high-energy (VHE, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and temporal properties of the PKS 1510-089 emission during a high gamma-ray state. Methods. We performed VHE gamma-ray observations of PKS 1510-089 with the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes during a long, high gamma-ray state in May 2015. In order to perform broadband modeling of the source, we have also gathered contemporaneous multiwavelength data in radio, IR, optical photometry and polarization, UV, X-ray, and GeV gamma-ray ranges. We construct a broadband spectral energy distribution (SED) in two periods, selected according to VHE gamma-ray state. Results. PKS 1510-089 was detected by MAGIC during a few day-long observations performed in the middle of a long, high optical and gamma-ray state, showing for the first time a significant VHE gamma-ray variability. Similarly to the optical and gamma-ray high state of the source detected in 2012, it was accompanied by a rotation of the optical polarization angle and the emission of a new jet component observed in radio. However, owing to large uncertainty on the knot separation time, the association with the VHE gamma-ray emission cannot be firmly established. The spectral shape in the VHE band during the flare is similar to those obtained during previous measurements of the source. The observed flux variability sets constraints for the first time on the size of the region from which VHE gamma rays are emitted. We model the broadband SED in the framework of the external Compton scenario and discuss the possible emission site in view of multiwavelength data and alternative emission models.

العلاقة: info:eu-repo/semantics/altIdentifier/wos/WOS:000406619100048; volume:603; numberofpages:12; journal:ASTRONOMY & ASTROPHYSICS; http://hdl.handle.net/11568/883094Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85021717542; https://www.aanda.org/articles/aa/abs/2017/07/aa29960-16/aa29960-16.htmlTest

الإتاحة: https://doi.org/10.1051/0004-6361/201629960Test
http://hdl.handle.net/11568/883094Test
https://www.aanda.org/articles/aa/abs/2017/07/aa29960-16/aa29960-16.htmlTest