X-Ray and Optical Monitoring of State Transitions in MAXI J1820+070
X-Ray and Optical Monitoring of State Transitions in MAXI J1820+070
Abstract We report results from the X-ray and optical monitoring of the black hole candidate MAXI J1820+070 (=ASSASN-18ey) over the entire period of its outburst from 2018 March to October. In this outburst, the source exhibited two sets of “fast rise and slow decay”-type long-term flux variations. We found that …