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[vsnet-alert 7403] Re: Bright Outburst of the Black Hole Candidate 4U 1543-47
- Date: Tue, 18 Jun 2002 09:05:43 +0900
- To: vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp, vsnet-campaign-xn@ooruri.kusastro.kyoto-u.ac.jp, vsnet-campaign@ooruri.kusastro.kyoto-u.ac.jp
- From: Daisaku NOGAMI <nogami@kwasan.kyoto-u.ac.jp>
- Subject: [vsnet-alert 7403] Re: Bright Outburst of the Black Hole Candidate 4U 1543-47
- Sender: owner-vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp
Date: Mon, 17 Jun 2002 15:42:48 -0400 (EDT)
From: Jon Miller <jmm@space.mit.edu>
Subject: Bright Outburst of the Black Hole Candidate 4U 1543-47
X-ray outburst in 4U1543-47
J. M. Miller and R. A. Remillard (M.I.T.), for the RXTE ASM Team
at M.I.T. and NASA Goddard Space Flight Center, report the detection
of a new X-ray outburst in the black hole binary, 4U1543-47 (archival
optical position: R.A. = 15h47m08.6s, Decl. = -47 40' 09", equinox
J2000.0; +/- 1 "). The first detections with the RXTE ASM
indicated a flux (2-12 keV) of 0.054 (+/- 0.009) Crab on June 16.683,
rapidly increasing to 0.5 Crab (June 17.122) and 1.65 Crab (June 17.552).
The X-ray spectrum is very soft, implying that the dominant component
is thermal emission from the accretion disk. Optical and radio
measurements are strongly encouraged.
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