{
  "bibcode": "2019GCN.26182....1L",
  "body": "The LIGO Scientific Collaboration and the Virgo Collaboration report:\n\nWe identified the compact binary merger candidate S191105e during\nreal-time processing of data from LIGO Hanford Observatory (H1), LIGO\nLivingston Observatory (L1), and Virgo Observatory (V1) at 2019-11-05\n14:35:21.933 UTC (GPS time: 1256999739.933). The candidate was found\nby the PyCBC Live [1], SPIIR [2], and GstLAL [3] analysis pipelines.\n\nThe preliminary alert was delayed by approximately one day due to a\nGraceDB authentication issue.\n\nS191105e is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 2.3e-08 Hz, or about one in 1\nyear, 4 months. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S191105e\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (95%), Terrestrial (5%), BNS (<1%), NSBH (<1%), or\nMassGap (<1%).\n\nAssuming the candidate is astrophysical in origin, there is strong\nevidence against the lighter compact object having a mass < 3 solar\nmasses (HasNS: <1%). Using the masses and spins inferred from the\nsignal, there is strong evidence against matter outside the final\ncompact object (HasRemnant: <1%).\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n\n* \"bayestar.fits.gz,0\", a preliminary localization generated by\n  BAYESTAR [4] for an earlier trigger, not the current preferred\n  event, and\n* \"bayestar.fits.gz,1\", an initial localization generated by BAYESTAR [4].\n  For the bayestar.fits.gz,1 sky map, the 90% credible region is 1297\n  deg2. Marginalized over the whole sky, the a posteriori luminosity\n  distance estimate is 1168 +/- 330 Mpc (a posteriori mean +/-\n  standard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo Public Alerts User Guide\n<https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Nitz et al. PRD 98, 024050 (2018)\n [2] Qi Chu, PhD Thesis, The University of Western Australia (2017)\n [3] Messick et al. PRD 95, 042001 (2017)\n [4] Singer & Price PRD 93, 024013 (2016)",
  "circularId": 26182,
  "createdOn": 1573064676000,
  "email": "leo.p.singer@nasa.gov",
  "subject": "LIGO/Virgo S191105e: Identification of a GW compact binary merger candidate",
  "submitter": "Leo Singer at GSFC  <leo.p.singer@nasa.gov>",
  "eventId": "LIGO/Virgo S191105e"
}