دورية أكاديمية
Simultaneous and quasi-simultaneous observations of the continuum emission of the quasar 3C 273 from radio to γ-ray energies
| العنوان: | Simultaneous and quasi-simultaneous observations of the continuum emission of the quasar 3C 273 from radio to γ-ray energies |
|---|---|
| المؤلفون: | Lichti, G G, Balonek, T, Courvoisier, T, Johnson, N., McConnell, Mark L., McNamara, B, Von Montigny, C, Paciesas, W, Robson, E I, Sadun, A, Schalinski, C, Staubert, R, Steppe, H, Swanenburg, B, Turner, M, Ulrich, M, Williams, O R, Smith, A. G. |
| المصدر: | Physics Scholarship |
| بيانات النشر: | University of New Hampshire Scholars' Repository |
| سنة النشر: | 1995 |
| المجموعة: | University of New Hampshire: Scholars Repository |
| مصطلحات موضوعية: | GAMMA-RAYS: OBSERVATIONS, QUASARS: INDIVIDUAL (3C 273), INFRARED: GALAXIES, ULTRAVIOLET: GALAXIES, RADIO CONTINUUM: GALAXIES, X-RAYS: GALAXIES, Astrophysics and Astronomy |
| الوصف: | From June 15-28, 1991 the Compton Gamma-Ray Observatory (CGRO) observed the radio-loud quasar 3C 273. All four CGRO instruments detected radiation from this quasar in their relevant energy ranges (from 20keV to 5GeV). Simultaneous and quasi-simultaneous observations by instruments sensitive at other wavelengths have also been performed. The data from all these observations, spanning the frequency range from 5.10^9^Hz to 8.5.10^24^Hz, were collected and analysed. Details of the observations and an overall energy-density spectrum are presented. This spectrum shows three maxima, one in the infrared (IR), one in the UV and another one at low-energy γ-rays, the latter two having nearly the same strength of 3.1.10^46^erg/(s frequency decade) and 2.7.10^46^erg/(s frequency decade), respectively. At low-energy γ-rays a break around 1MeV (=2.418.10^20^Hz) in the energy-density spectrum is evident. The change of the spectral index between X- and γ-rays is ~0.8. The implications of these simultaneous and quasi-simultaneous observations on some theoretical models are discussed. |
| نوع الوثيقة: | text |
| اللغة: | unknown |
| العلاقة: | https://scholars.unh.edu/physics_facpub/367Test; http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?db_key=AST&bibcode=1995A%26A.298.711L&letter=.&classic=YES&defaultprint=YES&whole_paper=YES&page=711&epage=711&send=Send+PDF&filetype=.pdfTest |
| الإتاحة: | https://scholars.unh.edu/physics_facpub/367Test http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?db_key=AST&bibcode=1995A%26A.298.711L&letter=.&classic=YES&defaultprint=YES&whole_paper=YES&page=711&epage=711&send=Send+PDF&filetype=.pdfTest |
| رقم الانضمام: | edsbas.46AB8EF |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |