MAXI/GSC observes a rapid spectral softening in XTE J1753-223

Details MAXI/GSC observes a rapid spectral softening in XTE J1753-223 MAXI/GSC observes a rapid spectral softening in XTE J1753-223

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2396....1n&link_type=abstract

The Astronomer's Telegram, #2396

Astronomy and Astrophysics

Astronomy

4

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

Scientific paper

MAXI/GSC has observed further spectral changes of the black hole candidate XTE J1753-223 (ATel #2258, #2259). After the gradual spectral softening since early January 2010 (ATel #2387), we observed a sharp increase of the soft (<4 keV) X-ray flux and a decline of the hard (>10 keV) X-ray flux on January 22, 2010. On January 22, the MAXI/GSC spectrum clearly shows two spectral components, a disk blackbody component and a power law component (as seen by RXTE, ATel #2391), which implies that the source is now in the soft state.

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