LIGO/Virgo G296853: IceCube neutrino observations
Abstract
We searched IceCube online track-like neutrino candidates (GFU) detected in a [-500,500] second interval about the LIGO-Virgo trigger G296853. We compared the candidate source directions of 4 temporally-coincident neutrinos to the BAYESTAR skymap, with the following parameters: # dt[s] RA[deg] Dec[deg] E[TeV] Sigma[deg] ------------------------------------------------------------------ 1. -310.02 65.9 -5.2 1.11 0.5 2. -128.45 74.0 -29.2 52.68 0.2 3. 361.60 164.0 -14.6 20.50 0.5 4. 438.49 121.1 -64.8 81.83 2.1 (dt--time from GW in [seconds]; RA/Dec--sky location in [degrees]; E--reconstructed secondary muon energy in [TeV]; Sigma--uncertainty of direction reconstruction in [degrees]) The analysis found NO COINCIDENT ONLINE TRACK-LIKE NEUTRINO CANDIDATES detected by IceCube within the 500 second window surrounding G296853 within the BAYESTAR skymap. A coincident neutrino-GW skymap has been posted to GraceDB (< https://gracedb.ligo.org/apiweb/events/G296853/files/ coinc_skymap_initial_icecube.png,0>). A JSON-formatted list of the above neutrinos can be downloaded from GraceDB at: <https://gracedb.ligo.org/ apiweb/events/G296853/files/IceCubeNeutrinoList.json,0> In addition, we are performing coincident searches with other IceCube data streams, including the high-energy starting events (HESE) and Supernova triggers. HESE events have typical energies > 60 TeV and start inside the detector volume, leading to a relatively pure event sample with a high fraction of astrophysical neutrinos. The SN trigger system is sensitive to sudden increases in photomultiplier counts across the detector, which could indicate a burst of MeV neutrinos. We will submit separate GCN circulars if coincident HESE or SN triggers are found. The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. For a description of the IceCube realtime alert system, please refer to < http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1610.01814>; for more information on joint neutrino and gravitational wave searches, please refer to <http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1602.05411>.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2017
- Bibcode:
- 2017GCN.21432....1B