Very high energy observations of the binaries V 404 CYG AND 4U 0115+634 during giant X-Ray outbursts
| العنوان: | Very high energy observations of the binaries V 404 CYG AND 4U 0115+634 during giant X-Ray outbursts |
|---|---|
| المؤلفون: | Wystan Benbow, Daniel Nieto, D. Staszak, Sanjay Kumar, P. Kaaret, A. Flinders, K. Ragan, Gernot Maier, S. Griffin, Matteo Cerruti, I. Telezhinsky, David Kieda, Jamie Holder, S. P. Wakely, P. Moriarty, John L. Quinn, Karen Byrum, N. Kelley-Hoskins, R. Mukherjee, A. Furniss, T. B. Humensky, R. A. Ong, Wei Cui, E. Pueschel, M. Fernandez-Alonso, S. Schlenstedt, O. Hervet, Q. Feng, E. Roache, D. S. Hanna, P. Wilcox, M. P. Connolly, A. C. Rovero, N. H. Park, Gordon T. Richards, M. Kertzman, J. H. Buckley, Abraham D. Falcone, C. A. Johnson, V. Bugaev, Karlen Shahinyan, David A. Williams, E. Bourbeau, H. Fleischhack, Ralph Bird, T. T.Y. Lin, Julien Rousselle, P. T. Reynolds, I. Sadeh, M. Hütten, P. Kar, M. J. Lang, A. Popkow, J. Tyler, J. Grube, Manel Errando, A. Archer, Stephan O'Brien, G. H. Sembroski, Lucy Fortson, Martin Pohl, M. Buchovecky, J. P. Finley, Maria Krause, A. Wilhelm |
| المصدر: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET The astrophysical journal / 1 831(1), 113 (2016). doi:10.3847/0004-637X/831/1/113 |
| بيانات النشر: | Iop Publishing, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | transients, black-hole, Astrophysics::High Energy Astrophysical Phenomena, Ciencias Físicas, X-ray binary, Flux, FOS: Physical sciences, Astrophysics, stars: individual (v 404 cyg, 4u 0115+634), 01 natural sciences, VERY HIGH ENERGY GAMMA RAYS, Luminosity, spectrum, X-RAY TRANSIENTS, purl.org/becyt/ford/1 [https], symbols.namesake, Observatory, 0103 physical sciences, Binary star, emission, tev, 010306 general physics, 010303 astronomy & astrophysics, acceleration of particles, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), ls i+61-degrees 303, Gamma ray, v404 cygni, Astronomy and Astrophysics, gamma rays: general, purl.org/becyt/ford/1.3 [https], veritas observations, Astronomía, Stars, binaries: general, 13. Climate action, Space and Planetary Science, Eddington luminosity, symbols, ddc:520, Astrophysics - High Energy Astrophysical Phenomena, CIENCIAS NATURALES Y EXACTAS, BINARY STARS |
| الوصف: | Transient X-ray binaries produce major outbursts in which the X-ray flux can increase over the quiescent level by factors as large as $10^7$. The low-mass X-ray binary V 404 Cyg and the high-mass system 4U 0115+634 underwent such major outbursts in June and October 2015, respectively. We present here observations at energies above hundreds of GeV with the VERITAS observatory taken during some of the brightest X-ray activity ever observed from these systems. No gamma-ray emission has been detected by VERITAS in 2.5 hours of observations of the microquasar V 404 Cyg from 2015, June 20-21. The upper flux limits derived from these observations on the gamma-ray flux above 200 GeV of F $< 4.4\times 10^{-12}$ cm$^{-2}$ s$^{-1}$ correspond to a tiny fraction (about $10^{-6}$) of the Eddington luminosity of the system, in stark contrast to that seen in the X-ray band. No gamma rays have been detected during observations of 4U 0115+634 in the period of major X-ray activity in October 2015. The flux upper limit derived from our observations is F $< 2.1\times 10^{-12}$ cm$^{-2}$ s$^{-1}$ for gamma rays above 300 GeV, setting an upper limit on the ratio of gamma-ray to X-ray luminosity of less than 4%. Accepted for publication in the Astrophysical Journal |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c3b61a0c4652450671d35e3d67c46fa http://iopscience.iop.org/article/10.3847/0004-637X/831/1/113/meta |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....3c3b61a0c4652450671d35e3d67c46fa |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |