Spectral state transition in the X-ray transient XTE J1752-223
Abstract
A comparison of publicly available Swift/BAT 15-50 keV and MAXI/GSC 1.5-4.0 keV light curves of the recently discovered X-ray transient and possible black hole candidate XTE J1752-223 indicates that the source is currently undergoing a transition from a spectrally hard to a spectrally soft X-ray state. Since the discovery of the source in late October 2009 (ATel #2258) until early January 2010 the low- and high-energy light curves had similar shapes, suggesting that the source showed little spectral evolution and had remained in the hard state (as deduced from RXTE observations; ATel #2261).
- Publication:
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The Astronomer's Telegram
- Pub Date:
- January 2010
- Bibcode:
- 2010ATel.2387....1H
- Keywords:
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- X-ray;
- Request for Observations;
- Black Holes;
- Transients