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SMC transient X-ray source IGR J01217-7257 detected by INTEGRAL

ATel #8246; M. J. Coe (Southampton University), A. J. Bird (Southampton University), C. M. Boon (Southampton University), V. A. McBride (UCT/SAAO), E. S. Bartlett (UCT), J. Kennea (PSU) and C. Ferrigno (ISDC, Switzerland)
on 4 Nov 2015; 20:51 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Malcolm Coe (mjcoe@soton.ac.uk)

Subjects: X-ray, Binary, Neutron Star, Transient

Referred to by ATel #: 8305, 8312

INTEGRAL observations of the SMC carried out 28-30 October 2015 show the presence of a clear source in both IBIS and JEM-X instruments. The JEM-X position is RA 20.4379 Dec -72.9577 with an uncertainty of 2 arcmins. The source was not detected in the previous INTEGRAL observations carried out 20-22 October 2015. This position is consistent with the transient source seen by INTEGRAL in January 2004 and named IGR J01217-7257 (Coe et al ATel #5806). Follow up Swift observations on 3 November 2015 reveal a clear source at position RA 20.42130 Dec -72.95853 with an uncertainty radius of 1.8". This position is coincident with the OGLE optical candidate SMC732.03.3540 proposed by Coe et al as the counterpart to this system. The Swift observations reveal no evidence for any pulsations in the period range 1 - 100s.