دورية أكاديمية
BRITE-Constellation: Nanosatellites for precision photometry of bright stars
| العنوان: | BRITE-Constellation: Nanosatellites for precision photometry of bright stars |
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| المؤلفون: | Weiss, W. W., Moffat, A. F. J., Schwarzenberg-Czerny, A., Koudelka, O. F., Grant, C. C., Zee, R. E., Kuschnig, R., Mochnacki, St., Rucinski, S. M., Matthews, J. M., Orleański, P., Pamyatnykh, A. A., Pigulski, A., Alves, J., Guedel, M., Handler, G., Wade, G. A., Scholtz, A. L. |
| المصدر: | Proceedings of the International Astronomical Union ; volume 9, issue S301, page 67-68 ; ISSN 1743-9213 1743-9221 |
| بيانات النشر: | Cambridge University Press (CUP) |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Astronomy and Astrophysics, Space and Planetary Science |
| الوصف: | BRITE-Constellation (where BRITE stands for BRI ght T arget E xplorer) is an international nanosatellite mission to monitor photometrically, in two colours, brightness and temperature variations of stars brighter than V ≈ 4, with precision and time coverage not possible from the ground. The current mission design consists of three pairs of 7 kg nanosats (hence “Constellation”) from Austria, Canada and Poland carrying optical telescopes (3 cm aperture) and CCDs. One instrument in each pair is equipped with a blue filter; the other, a red filter. The first two nanosats (funded by Austria) are UniBRITE , designed and built by UTIAS-SFL (University of Toronto Institute for Aerospace Studies-Space Flight Laboratory) and its twin, BRITE-Austria , built by the Technical University Graz (TUG) with support of UTIAS-SFL. They were launched on 25 February 2013 by the Indian Space Agency, under contract to the Canadian Space Agency. Each BRITE instrument has a wide field of view (≈ 24 degrees), so up to 15 bright stars can be observed simultaneously in 32 × 32 sub-rasters. Photometry (with reduced precision but thorough time sampling) of additional fainter targets will be possible through on-board data processing. A critical technical element of the BRITE mission is the three-axis attitude control system to stabilize a nanosat with very low inertia. The pointing stability is better than 1.5 arcminutes rms, a significant advance by UTIAS-SFL over any previous nanosatellite. BRITE-Constellation will primarily measure p- and g-mode pulsations to probe the interiors and ages of stars through asteroseismology. The BRITE sample of many of the brightest stars in the night sky is dominated by the most intrinsically luminous stars: massive stars seen at all evolutionary stages, and evolved medium-mass stars at the very end of their nuclear burning phases (cool giants and AGB stars). The Hertzsprung-Russell diagram for stars brighter than mag V =4 from which the BRITE-Constellation sample will be selected is shown in Fig. 1. ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1017/s1743921313014105 |
| الإتاحة: | https://doi.org/10.1017/s1743921313014105Test https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921313014105Test |
| حقوق: | https://www.cambridge.org/core/termsTest |
| رقم الانضمام: | edsbas.9F1B0518 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1017/s1743921313014105 |
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