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Another X-Ray Brightening of H 1743-322 = IGR J1746-3213

ATel #301; Jean Swank(NASA/GSFC)
on 10 Jul 2004; 19:17 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Jean Swank (swank@milkyway.gsfc.nasa.gov)

Subjects: Request for Observations, Binary, Black Hole, Transient

Referred to by ATel #: 304, 314, 575

The black hole candidate X-ray transient H 1743-322 = IGR J1746-3213 = XTE J17464-3213, which went into outburst in March 2003 (ATEL#132,#133) and decayed below the RXTE PCA sensitivity limit sometime between Nov 2 and 2004 Feb 7, while it was too close to the sun, has brightened again. On Jul 3, the PCA scans of the galactic bulge detected it at a 2-10 keV intensity of 16(1) mCrab and on Jul 7, it had risen to 69(2) mCrab. The RXTE ASM had no observations of it Jun 29 - Jul 6 but saw 60(70)-160(30) mCrab Jul 6-10. Additional RXTE observations are planned on Jul 11. It has previously been an active radio transient (first reported in ATEL#137).