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GCN Circular 21222

Subject
LIGO/VIRGO G288732: Fermi GBM Observations
Date
2017-06-08T17:03:27Z (8 years ago)
From
Rachel Hamburg at UAH <rkh0007@uah.edu>
LIGO/VIRGO G288732: Fermi GBM Observations

R. Hamburg (UAH) reports on behalf of the GBM-LIGO Group:
Lindy Blackburn (CfA), Michael S. Briggs (UAH), Jacob Broida (Carleton
College), E. Burns (USRA), Jordan Camp (NASA/GSFC), Tito Dal Canton
(NASA/GSFC), Nelson Christensen (Carleton College), Valerie Connaughton
(USRA), Adam Goldstein (USRA), Rachel Hamburg (UAH), C. Michelle Hui
(NASA/MSFC), Pete Jenke (UAH), Dan Kocevski (NASA/MSFC), Nicolas Leroy
(LAL), Tyson Littenberg (NASA/MSFC), Julie McEnery (NASA/GSFC), Rob Preece
(UAH), Judith Racusin (NASA/GSFC), Peter Shawhan (UMD), Karelle Siellez (GA
Tech), Leo Singer (NASA/GSFC), John Veitch (Birmingham), Peter Veres (UAH),
Colleen Wilson-Hodge (NASA/MSFC)


At the G288732 event time, GBM was observing 89% of the LIGO Bayestar
probability map and viewing the entire unocculted sky approximately 67
degrees from Earth center (RA = 197.9, DEC  = +19.5).

There was a single GBM on-board trigger within 1 hour of event time.
However, this trigger was due to a terrestrial gamma-ray flash and
unrelated to the G288732 event. The untargeted ground-based search of GBM
data for short-duration GRBs (Briggs et al., in prep) found no candidates
close in time to G288732.

The targeted search of the GBM data ([1], [2]) also did not find a
significant gamma-ray signal. This search processes time scales of 0.256 to
8.192 s within 30 s of the LIGO event. No interesting gamma-ray candidate
was found within this time window.

Further analysis and upper limits will be reported later.


[1] L. Blackburn et al. 2015, ApjS 217, 8
[2] A. Goldstein et al. arXiv:1612.02395Loading...