GCN Circular 17607
Subject
Confirmation that Swift trigger 635306 is not an astrophysical source
Date
2015-03-18T21:50:04Z (10 years ago)
From
Hans Krimm at NASA-GSFC <hans.a.krimm@nasa.gov>
H. A. Krimm (CRESST/GSFC/USRA) and C. Pagani (U Leicester) report on behalf of
the Swift Team:
We conclude that Swift trigger #635306 (Breeveld, et al., GCN Circ. 17601) was
the result of noise fluctuations and is not due to a GRB or other astrophysical
event.
We have analyzed the BAT data set from T-239 to T+963 sec from the recent
telemetry downlink. We find that there is no sign of significant emission from
the trigger location at any point in this interval.
XRT observations in Photon Counting mode data started 164 s after the BAT
trigger. In 1ks of PC data no source is detected inside the BAT error circle.
The three sigma upper limit is 6e-3 counts/second.