New X-ray Transient, XTE J1726-476
ATel #623; A. M. Levine (MIT), D. Lin (MIT), and R. A. Remillard (MIT), for the ASM team at MIT and NASA/GSFC
on 10 Oct 2005; 15:03 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Ron Remillard (rr@space.mit.edu)
Subjects: X-ray, Transient
Observations with the RXTE All-Sky Monitor reveal X-ray emission from
a new transient at coordinates 261.585, -47.570 (degrees, J2000), with
a position uncertainty of 0.07 degrees at 90% confidence. The source
was first detected on 2005 October 4, with an average flux of 32 (4)
mCrab at 2-12 keV. By 2005 October 6 the flux had increased to 83
(5). The ASM hardness ratios (5-12 keV to 3-5 keV and 3-5 keV to 1.5-3
keV) both indicate a very soft spectrum, suggesting a black-hole
binary with a thermal-type spectrum. Observations at other wavelengths
are needed as soon as possible.
