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Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - GRI - Gamma Ray Indirect
Multiwavelength observation of MAXI J1820+070 with MAGIC, VERITAS and H.E.S.S.
J. Hoang,* E. Molina, M. Lopez, M. Ribó, O. Blanch, J. Cortina, G. Maier, N. Park, M. De Naurois, E. de Oña Wilhelmi, J.P. Ernenwein, D. Malyshev, A. Mitchell, S. Ohm, R. Zanin
*corresponding author
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Pre-published on: 2019 July 22
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MAXI J1820+070 is a new low-mass microquasar hosting a black hole recently discovered in X-rays by the MAXI instrument. It is the counterpart of ASASSN-18ey, discovered in optical a few days before by ASAS-SN. This source underwent a major outburst in 2018, during which it completed the typical "q-shaped" path in the hardness-intensity diagram. MAGIC, VERITAS and H.E.S.S. gamma-ray telescopes observed the sky position of MAXI J1820+070 for a total of more than 90 hours in 2018. In addition, some observations were carried out using MAGIC Central Pixel - a dedicated central pixel capable of detecting fast optical signals (10 kHz sampling rate, peak sensitivity in the U-band). This contribution presents the methods used to search for transient optical and very high energy gamma-ray emission from MAXI J1820+070, as well as the latest results in these energy ranges.
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