RXTE PCA Position for XTE J1818-245
ATel #579; C. B. Markwardt (GSFC/UMD), T. E. Strohmayer (GSFC), J. H. Swank (GSFC), A. M. Levine (MIT)
on 16 Aug 2005; 17:28 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Craig B. Markwardt (craigm@lheamail.gsfc.nasa.gov)
Subjects: X-ray, Binary, Black Hole, Transient
Referred to by ATel #: 583, 585
RXTE observed the position of XTE J1818-245 (ATEL #578) on Aug 16,
04:19 to 05:15 UT. The observation included both pointed data and a
cross scan for position. We note the corrected source name.
The best fit position is R.A., Dec.
= 274.605, -24.542 deg (J2000), with an estimated systematic position
uncertainty of ~1 arcmin. This position is approximately 50 arcsec
from the ASM position reported in ATEL #578 by Levine et al.
The spectrum is reasonably well fit by a strong soft thermal component
(kT ~ 0.5 keV) plus a steep power law (gamma ~2.6), and a feature near
6.4 keV. The X-ray fluxes in the 2-10, 10-20 and 20-40 keV bands are
77, 1.7 and 1.4 times 1E-10 erg cmE-2 sE-1.
No pulsations are detected. As noted by Levine et al (ATEL #578),
these behaviors are suggestive of a black hole transient.
