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IGR J17464-2811 is XMMU J174716.1-281048

ATEL # 972; Rudy Wijnands (University of Amsterdam)
on 22 Dec 2006; 16:51 UT
Password Certification: Rudy Wijnands (

Subjects: X-ray, Binaries, Neutron Stars, Transients

The position of the new fast X-ray transient IGR J17464-2811 (ATEL #970) is consistent with that of the transient XMMU J174716.1-281048 which was active during XMM-Newton observations of this region performed on February 26-27, 2005 (Sidoli et al. 2006, A&A 456, 287). The positional coincidence as well as the closeness in time of the INTEGRAL and XMM-Newton observations strongly indicate that both satellites detected the same transient source. The XMM-Newton position of this source as listed in the Sidoli et al. paper is RA = 266.817367 deg, Dec = -28.180065 deg (J2000; with an error of approximately 4 arcseconds). This transient source has been previously detected with XMM-Newton on March 12, 2003, but could not be detected during observations on September, 23, 2000 (indicating X-ray fluxes of at least 80 times lower; ATEL #147). The transient nature of the source combined with the likely detection of a type-I X-ray burst with INTEGRAL (ATEL #970) strongly suggest that this source is a transiently accreting neutron-star X-ray binary likely with a low-mass companion star.

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