Spectral state transition in the X-ray transient XTE J1752-223

Details Spectral state transition in the X-ray transient XTE J1752-223 Spectral state transition in the X-ray transient XTE J1752-223

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2387....1h&link_type=abstract

The Astronomer's Telegram, #2387

Astronomy and Astrophysics

Astronomy

7

X-Ray, Request For Observations, Black Holes, Transients

Scientific paper

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).

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