GCN Circular 14398
Subject
GRB 130327B: Swift/XRT source is not the afterglow
Event
Date
2013-04-19T20:11:29Z (13 years ago)
From
Hans Krimm at NASA-GSFC <hans.krimm@nasa.gov>
H. A. Krimm (CRESST/GSFC/USRA) and E. Troja (NASA/GSFC/CRESST) for the Swift team:
Swift carried out an additional 4.6 ksec observation of the field containing GRB
130327B (e.g. Longo et al, GCN 14344; Ohno et al, GCN 14347), starting at
2013-04-18 12:43:13 UT, approximately 22 days after the burst. The source
reported in Krimm & Mangano (GCN 14353) as a possible afterglow to GRB 130327B
is still detected at a rate of 0.002 � 0.001 cts/s (0.3-10 keV), which is
statistically consistent with the rate reported in GCN 14353. Since we would
expect a GRB afterglow to have faded over this time period, we conclude that the
XRT source is not associated with GRB 130327B, and is instead a background
source, possibly an AGN.
No further Swift observations are planned.