MAGIC observations of the microquasar V404 Cygni during the 2015 outburst
Abstract
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 ph cm s. 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 cm from the compact object.
Keywords
Cite
@article{arxiv.1707.00887,
title = {MAGIC observations of the microquasar V404 Cygni during the 2015 outburst},
author = {M. L. Ahnen and S. Ansoldi and L. A. Antonelli and C. Arcaro and A. Babić and B. Banerjee and P. Bangale and U. Barres de Almeida and J. A. Barrio and J. Becerra González and W. Bednarek and E. Bernardini and A. Berti and B. Biasuzzi and A. Biland and O. Blanch and S. Bonnefoy and G. Bonnoli and R. Carosi and A. Carosi and A. Chatterjee and P. Colin and E. Colombo and J. L. Contreras and J. Cortina and S. Covino and P. Cumani and P. Da Vela and F. Dazzi and A. De Angelis and B. De Lotto and E. de Oña Wilhelmi and F. Di Pierro and M. Doert and A. Domínguez and D. Dominis Prester and D. Dorner and M. Doro and S. Einecke and D. Eisenacher Glawion and D. Elsaesser and M. Engelkemeier and V. Fallah Ramazani and A. Fernández-Barral and D. Fidalgo and M. V. Fonseca and L. Font and C. Fruck and D. Galindo and R. J. García López and M. Garczarczyk and M. Gaug and P. Giammaria and N. Godinović and D. Gora and S. Griffiths and D. Guberman and D. Hadasch and A. Hahn and T. Hassan and M. Hayashida and J. Herrera and J. Hose and D. Hrupec and G. Hughes and K. Ishio and Y. Konno and H. Kubo and J. Kushida and D. Kuveždić and D. Lelas and E. Lindfors and S. Lombardi and F. Longo and M. López and C. Maggio and P. Majumdar and M. Makariev and G. Maneva and M. Manganaro and K. Mannheim and L. Maraschi and M. Mariotti and M. Martínez and D. Mazin and U. Menzel and M. Minev and R. Mirzoyan and A. Moralejo and V. Moreno and E. Moretti and V. Neustroev and A. Niedzwiecki and M. Nievas Rosillo and K. Nilsson and D. Ninci and K. Nishijima and K. Noda and L. Nogués and S. Paiano and J. Palacio and D. Paneque and R. Paoletti and J. M. Paredes and X. Paredes-Fortuny and G. Pedaletti and M. Peresano and L. Perri and M. Persic and P. G. Prada Moroni and E. Prandini and I. Puljak and J. R. Garcia and I. Reichardt and W. Rhode and M. Ribó and J. Rico and T. Saito and K. Satalecka and S. Schroeder and T. Schweizer and A. Sillanpää and J. Sitarek and I. Šnidarić and D. Sobczynska and A. Stamerra and M. Strzys and T. Surić and L. Takalo and F. Tavecchio and P. Temnikov and T. Terzić and D. Tescaro and M. Teshima and D. F. Torres and N. Torres-Albà and A. Treves and G. Vanzo and M. Vazquez Acosta and I. Vovk and J. E. Ward and M. Will and D. Zarić and A. Loh and J. Rodriguez},
journal= {arXiv preprint arXiv:1707.00887},
year = {2020}
}
Comments
7 pages, accepted by MNRAS