GCN Circular 18346

P.A. Evans (U. Leicester), J.A. Kennea (PSU), Scott Barthelmy
(NASA/GSFC), Dave Burrows (PSU), Sergio Campana (INAF-OAB), Brad Cenko
(NASA/GSFC), Neil Gehrels (NASA/GSFC), Paolo Giommi (ASI), Frank
Marshall (NASA/GSFC), John Nousek (PSU), Paul O'Brien (U. Leicester),
Julian Osborne (U. Leicester), David Palmer (LANL), Matteo Perri
(ASDC), Judy Racusin (NASA/GSFC), Mike Siegel (PSU), Gianpiero
Tagliaferri (INAF-OAB) report on behalf of the Swift team:

Swift has performed further observations of the error region of advanced
LIGO trigger G184098. The previously-reported observations covered 8
galaxies within the error region, listed below; the typical upper limit
from these observations is 2.6e-13 erg cm^-2 s^-1 (0.3-10 keV).
Subsequently a 37-point tiled observation has been performed, covering a
portion of the LMC within the GW error region, centred on RA,Dec =
103.8877, -68.3023 (06h 55m 33.04s, -68d 18' 08.3"), with ~60 s exposure
per tile. No X-ray sources were found in these observations. The upper
limits from these observations range from 3.3e-12 to 1.3e-11 erg cm^-2
s^-1 (0.3-10 keV).

The galaxies covered by the original observations were:
ESO089-015
ESO089-016
ESO088-018
ESO088-017
PGC298845
ESO126-002
ESO126-004
ESO089-009
ESO090-011
PGC314417

Details of these observations have been uploaded to the GraceDB.

This circular is an official product of the Swift team.

[GCN OPS NOTE(19sep15): This Circular was originally published on 14:01 19-Sep-2015 UT.]