MAGIC observations of the microquasar V404 Cygni during the 2015 outburst (CROSBI ID 240694)
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Podaci o odgovornosti
Ahnen, Max Ludwig ; ... ; Babić, Ana ; ... ; Dominis Prester, Dijana ; ... ; Godinović, Nikola ; ... ; Hrupec, Dario ; ... ; Kuveždić, Danijela ; ... ; Lelas, Damir ; ... ; ... ; Manganaro, Marina ; Puljak, Ivica ; ... ; Šnidarić, Iva ; ... ; Terzić, Tomislav ; ... ; Zarić, Darko ; ... ; Rodriguez, J.
MAGIC Collaboration
engleski
MAGIC observations of the microquasar V404 Cygni during the 2015 outburst
The microquasar V404 Cygni underwent a series of outbursts in 2015, June 15-31, during which its flux in hard X-rays (20-40 keV) reached about 40 times the Crab Nebula flux. Because of the exceptional interest of the flaring activity from this source, observations at several wavelengths were conducted. The MAGIC telescopes, triggered by the INTEGRAL alerts, followed-up the flaring source for several nights during the period June 18-27, for more than 10 hours. One hour of observation was conducted simultaneously to a giant 22 GHz radio flare and a hint of signal at GeV energies seen by Fermi-LAT. The MAGIC observations did not show significant emission in any of the analysed time intervals. The derived flux upper limit, in the energy range 200-1250 GeV, is 4.8*10^−12 ph cm^−2 s^−1. We estimate the gamma-ray opacity during the flaring period, which along with our non-detection, points to an inefficient acceleration in the V404 Cyg jets if VHE emitter is located further than 10^10 cm from the compact object.
gamma-rays: general ; X-rays: binaries ; stars: individual: V404 Cygni (V404 Cyg)
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Podaci o izdanju
471 (2)
2017.
1688-1693
objavljeno
0035-8711
1365-2966
10.1093/mnras/stx1690