Detection of an eclipse ingress confirms outburst from GRS 1747-312
ATel #13192; A. Bahramian (ICRAR), J. A. Kennea (PSU), C. O. Heinke, G. R. Sivakoff (Alberta), T. J. Maccarone, L. Rivera Sandoval (Texas Tech)
on 14 Oct 2019; 22:31 UT
Credential Certification: Arash Bahramian (arash.bahramian@curtin.edu.au)
Subjects: X-ray, Binary, Globular Cluster, Neutron Star, Transient
Following the detection of activity in the direction of Terzan 6 (the host cluster to the eclipsing X-ray binary GRS 1747-312, ATels #13154, #13155, #13157), we performed a Swift/XRT observation on 2019-10-11, targeting a predicted eclipse ingress based on the well-constrained ephemeris of GRS 1747-312 (In't Zand et al. 2001).
We detected an ingress on 2019-10-11 at 04:23:51 +/-5 s, consistent with a predicted ingress at 04:23:55.3 (all times in the barycentric frame). This confirms that the current outburst is renewed activity from the known low-mass X-ray binary GRS 1747-312.
We thank the Swift team for rapidly scheduling our observation.
