[vsnet-grb-info 13346] GRB 130518B found in ground analysis of Swift-BAT data

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14682
SUBJECT: GRB 130518B found in ground analysis of Swift-BAT data
DATE:    13/05/20 14:04:04 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  <james.r.cummings at nasa.gov>

J. R. Cummings (UMBC/CRESST/GSFC) reports on behalf of the Swift-BAT team:

At 10:50:38 UTC, Swift-BAT triggered on GRB 130418A (trigger # 556105).  A
sub-threshold source was found onboard.  In ground analysis, a source was
confirmed at RA, Dec 321.555, -20.148, which is:

RA (J2000)    21h 26m 13.2s
Dec (J2000)  -20d 08m 53s

with an estimated uncertainty of 1.8 arcmin radius (90% confidence).

The burst as seen in BAT was a single FRED peak of approximately 15 seconds
duration.

A Swift TOO request has been submitted and approved to locate the afterglow.