GBM detection of XTE J1752-223 to above 100 keV

Astronomy and Astrophysics – Astronomy

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X-Ray, Gamma Ray, Binaries, Black Holes

Scientific paper

The new transient black hole candidate XTE J1752-223 (ATel. #2258; see also ATels. #2259, #2261, #2263, #2268, #2269, #2278), is also detected using the Earth occultation technique with the Gamma Ray Burst Monitor (GBM) on Fermi. We detect the source to above 100 keV, with a mean 100-300 keV flux for 2009 Oct 30 - November 2 of 740+/-120 mCrab. The transient rose from undetectable on 2009 October 24 to 560+/-55 mCrab (12-25 keV), 510+/-80 mCrab (25-50 keV), 970+/-120 mCrab (50-100 keV), and 770+/-230 mCrab (100-300 keV) on 2009 November 2.

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