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We find the low-mass X-ray binary SAX J1747.0-2853 at a flux of 245 +/-65 mCrab between 3-10 keV with a detection significance of 4 sigma for a total effective exposure of 14.9 ksec. The source is not detected in the 10-25 keV band with an upper limit of 5 mCrab. The last outburst of this transient source was observed a year ago, lasting from end of January until at least end of March 2011 (see, e.g., ATels #3123, #3172, #3183, #3217).
The black hole candidate and microquasar H1743-322 (also known as IGR J17464-3213), observed during a total effective exposure of 7.5 ksec, is measured at a flux of 350 +/- 100 mCrab with a detection significance of 3.5 sigma between 3-10 keV, and 53 +/-25 mCrab at 2.5 sigma between 10-25 keV. The source was observed by INTEGRAL at the beginning of an outburst in April 2011 (ATels #3263, 3267), and renewed activity was reported by MAXI at the end of 2011 (ATel #3842).
The X-ray burster KS 1741-293 (AX J1744.8-2921) is clearly active at a measured flux of 415 +/- 75 mCrab between 3-10 keV for a detection significance of 5.5 sigma and effective exposure of 15 ksec, and 80 +/- 10 mCrab at 9 sigma between 10-25 keV. A short (15 sec) X-ray burst is detected with a 3-25 keV peak flux of 0.6 Crab at UT 10:46:39 on February 14th.
INTEGRAL will continue to monitor the Galactic bulge about every third day until mid April, and observation results from near real time data will be made available at: http://integral.esac.esa.int/BULGE/index.html
|Publication date||16 Feb 2012|
|Publication status||Published - 16 Feb 2012|
|Series||The Astronomer's telegram|
- Black hole
- Neutron star