XTE J1817-330 decline has reached the X-ray hard state
ATel #836; Ronald A. Remillard (MIT) and Jeffrey E. McClintock (CFA)
on 13 Jun 2006; 13:53 UT
Credential Certification: Ron Remillard (rr@space.mit.edu)
Subjects: X-ray, Request for Observations, Black Hole, Transient
The X-ray outburst of the galactic black hole candidate XTEJ 1817-330
reached a maximum flux of 1.2 Crab (PCA, 2-30 keV) on 2006 January 30.
Since then, this source has slowly declined while continuing to exhibit
a soft X-ray spectrum. The decline reached 10-15 mCrab during
2006 May 18-31. However, the source brightening slightly over
June 1-5 while it transitioned to the X-ray hard state. Observations
on June 7, 9, and 11 show a roughly steady count rate (24-28 mCrab),
with a hard spectrum and elevated levels in the power density continuum
(rms ~ 0.2, integrated over 0.1 to 10 Hz for full PCA bandwidth).
Observations in radio and other wavebands are strongly encouraged.
