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.
@article{arxiv.1908.06958,
title = {Multi-wavelength observation of MAXI J1820+070 with MAGIC, VERITAS and H.E.S.S},
author = {J. Hoang and E. Molina and M. López and M. Ribó and O. Blanch and J. Cortina and G. Maier and N. Park and M. de Naurois and E. de Ona Wilhelmi and J. P. Ernenwein and D. Malyshev and A. Mitchell and S. Ohm and R. Zanin},
journal= {arXiv preprint arXiv:1908.06958},
year = {2019}
}
Comments
Proceedings of the ICRC 2019. Changes with respect to V1 to satisfy MAGIC's publication guideline: 1: Include "on behalf of the MAGIC, VERITAS, and H.E.S.S. Collaborations" in the author list and also in the arXiv submission. 2: Put "Proceedings of the ICRC 2019" put into the comments field. 3: Use the identifier "MAGIC-ICRC/2019/13" in the field "Report-No."