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[vsnet-alert 5628] XTE J1550-564 brightening again
- Date: Wed, 31 Jan 2001 17:21:00 +0900 (JST)
- To: vsnet-alert, vsnet-campaign, vsnet-campaign-xray
- From: Taichi Kato <tkato>
- Subject: [vsnet-alert 5628] XTE J1550-564 brightening again
- Cc: vsnet-gcvs
- Sender: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
XTE J1550-564 brightening again
According to IAUCs 7575, the southern black hole X-ray transient
(X-ray nova) XTE J1550-564 is brightening again. The source has brigtened
V=18.3 on Jan. 28-30 (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 at
15h 50m 58s.78, -56o 28' 35".0 (J2000.0, IAUC 7009). Among VSNET
members, Gordon Garradd observed the source for several nights.
The present renewed activity may or may not resemble "mini-outbursts"
notably observed in GRO J0422+32 (=V518 Per). Another outburst was
observed in 2000 April (IAUC 7399, 7400). The object would be well
observed using a small telescope with a CCD.
Sequence information: see vsnet-alert 4607, 4608
Regards,
VSNET Collaboration team
(PS. Among the transients in 1998, the object still lacks the GCVS designation)
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