Bright X-ray Outburst of the Black Hole Candidate 4U 1543-47
ATel #98; J. M. Miller and R. A. Remillard (MIT)
on 17 Jun 2002; 16:32 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Jon M. Miller (jmm@space.mit.edu)
Subjects: X-ray, Request for Observations, Binary, Black Hole, Transient
On behalf of the RXTE ASM Team at M.I.T. and NASA Goddard Space Flight
Center, we report the detection of a new X-ray outburst in the black hole
binary, 4U 1543-47 (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.
