NASA Swift: GRB 060322: Swift-BAT detection of a 200-sec burst

TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 4903
SUBJECT: GRB 060322: Swift-BAT detection of a 200-sec burst
DATE: 06/03/22 23:30:18 GMT
FROM: Scott Barthelmy at NASA/GSFC Scott@lheamail.gsfc.nasa.gov

M. Perri (ASDC), S.D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), C.B. Markwardt (GSFC/UMD), D. M. Palmer (LANL) and L. Vetere (ASDC) report on behalf of the Swift Team:

At 23:00:21 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060322 (trigger=202442). Swift did not slew to this burst because the location is within the Moon observing constraint (8 deg). The BAT on-board calculated location is RA,Dec 274.245, -36.697 {18h 16m 59s, -36d 41′ 50″} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a double episode of multi-peak structures. The first episode starts at T-10 sec and lasts to T+35 sec. The second episode starts at T+155 sec and lasts to T+200. The total duration is about 210 sec. We note that this location is near the Galactic Bulge, but that the light curve is much more like a GRB than any galactic x-ray bursting source. The peak count rate was ~1600 counts/sec (15-350 keV), at ~1 sec after the trigger in the first episode and the same rate at T+180 sec in the second episode.

This location will come out of Moon constraint at 09:00 24 Mar 06.