LIGO/Virgo S190910h: Identification of a GW compact binary merger candidate
Abstract
We identified the compact binary merger candidate S190910h during real-time processing of data from LIGO Livingston Observatory (L1) at 2019-09-10 08:29:58.544 UTC (GPS time: 1252139416.544). The candidate was found by the GstLAL [1] analysis pipeline. S190910h is an event of interest because its false alarm rate, as estimated by the online analysis, is 3.6e-08 Hz, or about one in 10 months. The event's properties can be found at this URL: https://gracedb.ligo.org/superevents/S190910h The classification of the GW signal, in order of descending probability, is BNS (61%), Terrestrial (39%), BBH (<1%), MassGap (<1%), or NSBH (<1%). Assuming the candidate is astrophysical in origin, there is strong evidence for the lighter compact object having a mass < 3 solar masses (HasNS: >99%). Using the masses and spins inferred from the signal, there is strong evidence for matter outside the final compact object (HasRemnant: >99%). One sky map is available at this time and can be retrieved from the GraceDB event page: * bayestar.fits.gz, an updated localization generated by BAYESTAR [2], distributed via GCN notice about 6 minutes after the candidate For the bayestar.fits.gz sky map, the 90% credible region is 24226 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 241 +/- 89 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>. [1] Messick et al. PRD 95, 042001 (2017) [2] Singer & Price PRD 93, 024013 (2016)
- Publication:
-
GRB Coordinates Network
- Pub Date:
- September 2019
- Bibcode:
- 2019GCN.25707....1L