The black hole X-ray binary MAXI J1820+070 recently showed signs of new outburst activity at optical wavelengths (ATel #14492) between 2021 March 7 and 20. Similarly, an increase in the 0.5-10 keV flux by a factor of ~3-4 was observed by Swift/XRT on 2021 March 29 (ATel #14495), which indicated that outburst activity had also started in X-rays.
|Original language||English (US)|
|Journal||The Astronomer's Telegram, No. 14582|
|State||Published - Apr 1 2021|
- Black Hole