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.
36th International Cosmic Ray Conference (ICRC2019)
- Pub Date:
- July 2019
- Astrophysics - High Energy Astrophysical Phenomena
- 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."