The new SGR 1550-5418 is the old AXP 1E1547.0-5408
ATel #1756; N. Rea (U. Amsterdam), P. Esposito (INAF-IASF, Milan), H. A. Krimm (CRESST/GSFC/USRA), D. M. Palmer (LANL), S. Mereghetti, A. Tiengo (INAF-IASF, Milan), G. L. Israel (INAF-OAR)
on 3 Oct 2008; 14:34 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Nanda Rea (N.Rea@sron.nl)
Subjects: X-ray, Request for Observations, Neutron Star, Soft Gamma-ray Repeater, Transient, Pulsar
N. Rea (U. Amsterdam), P. Esposito (INAF-IASF, Milan), H. A. Krimm (CRESST/GSFC/USRA), D. M. Palmer (LANL), S. Mereghetti, A. Tiengo (INAF-IASF, Milan), G.L. Israel (INAF-OAR)
Swift-BAT triggered today on several Galactic short bursts (Krimm et al. GCN 8311, 8312), which were claimed to come from a new Soft Gamma Repeater SGR 1550-5418. However, given the positional coincidence of this new putative SGR 1550-5418 with the Anomalous X-ray Pulsar (AXP) 1E1547.0-5408 (Gelfand & Gaensler 2007; Camilo et al. 2008; Halpern et al. 2008), and the enhanced X-ray flux observed from promptly downlinked XRT data of this source (Krimm et al. 8311), we now identify the source of these bursts being the AXP 1E1547.0-5408.
See http://staff.science.uva.nl/~nrea/1E1546_XMM_CXO_GCNs.jpg for an X-ray image of the field with superimposed the Swift-BAT and XRT error circles from Krimm et al. (GCN 8311, 8312).
XMM-Newton and Chandra field of AXP 1E1547.0-5408