LIGO/Virgo S191216ap: HAWC gamma-ray sub-threshold event coincident with LIGO/Virgo and IceCube localizations
Abstract
The HAWC Collaboration performed a follow-up of the gravitational wave trigger S191216ap, reported in GCN Circular 26455. We did not report a significant detection after considering the trials incurred by looking at the whole gravitational wave localization contour. We however found that the most significant sub-threshold event is coincident with the (corrected) localization of a neutrino event reported by IceCube in GCN Circular 26463 (RA: 323.19 deg, Dec: 4.53 deg, 90% cont.: 4.07 deg). The HAWC event coordinates are: RA (J2000): 323.53 deg Dec (J2000): 5.23 deg 68% cont.: 0.30 deg Significance: 4.6 sigma (pre-trials) This event was found in the 10 s search, starting at 1260567316.47 GPSs (80.0 s after the time of coalescence). We encourage follow-up observations of this location.
- Publication:
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GRB Coordinates Network
- Pub Date:
- December 2019
- Bibcode:
- 2019GCN.26472....1H