GCN Circular 35863
Subject
Swift Trigger 1218645: Another detection of Swift J151857.0-572147
Date
2024-03-04T18:39:12Z (9 months ago)
From
Jamie Kennea at Penn State <jak51@psu.edu>
Via
email
E. Ambrosi (INAF-IASFPA), J. A. Kennea (PSU), A. Y. Lien (U Tampa),
M. J. Moss (GSFC), K. L. Page (U Leicester), M. H. Siegel (PSU) and
M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift
Observatory Team:
At 18:26:54 UT, the Swift Burst Alert Telescope (BAT) triggered and
located Swift J151857.0-572147 (trigger=1218645). Swift slewed
immediately to the source.
The BAT on-board calculated location is
RA, Dec 229.720, -57.363 which is
RA(J2000) = 15h 18m 53s
Dec(J2000) = -57d 21' 47"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).
This is the third BAT trigger on Swift J151857.0-572147 (GCN #35849,
GCN #35853, GCN #35858). Repeated triggers indicate that the source
is continuing to brighten.