XTE J1550-564: Re-bright
According to IAUCs 7399 and 7400, the southern black hole X-ray transient
(X-ray nova) XTE J1550-564 was brightening again on early April.
The source has brigtened
V=19.1 on Mar. 29 to V=18.1 on Apr. 10 (R magnitudes are typically 1 mag
brighter). The source was first observed in outburst in 1998 September
(IAUC 7008), whose optical counterpart (V=16) was immediately discovered
(J2000.0, IAUC 7009).
The present renewed activity may or may not resemble "mini-outbursts"
notably observed in GRO J0422+32 (=V518 Per).