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GCN Circular 35867

Subject

Swift Trigger 1218696: Another trigger on Swift J151857.0-572147

Date

2024-03-05T04:14:46Z (2 months ago)

From

Jamie Kennea at Penn State <jak51@psu.edu>

Via


J. A. Kennea (PSU) report on behalf of the Neil Gehrels Swift
Observatory Team:

At 03:46:30 UT, the Swift Burst Alert Telescope (BAT) triggered and
located Swift J151857.0-572147 (trigger=1218696).  Swift did not 
slew to the source due to engineering activities. No XRT or UVOT data
will be collected. The BAT on-board calculated location is 
RA, Dec 229.705, -57.346 which is 
   RA(J2000) = 15h 18m 49s
   Dec(J2000) = -57d 20' 45"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a [**double-peaked**]
structure with a duration of about TTT sec.  The peak count rate
was ~1070 counts/sec (15-350 keV), at ~-1 sec after the trigger.