Rebrightening of ASASSN-18ey = MAXI J1820+070
ATel #12567; J. Ulowetz, G. Myers, J. Patterson (Center for Backyard Astrophysics)
on 12 Mar 2019; 12:11 UT
Credential Certification: Jules Halpern (jules@astro.columbia.edu)
Subjects: Optical, X-ray, Binary, Black Hole, Transient
The X-ray transient ASASSN-18ey = MAXI J1820+070 (ATel #11423,
#11756, #12128, #12157, #12534) has experienced a post-outburst
"rebrightening" or "echo outburst". Our nightly light curves from the
Center for Backyard Astrophysics network show that the transient faded
below V=17.2 - close to quiescence - by JD 2,458,460. Scattered
observation during JD 2458523-2458540 showed the star near V=17.7.
During JD 2458552-2458554, the star rose rapidly from V=17.2 to V=15.4.
Such a rebrightening, long after the main outburst, warrants coverage at
all wavelengths.
