{
  "bibcode": "2020GCN.26715....1L",
  "body": "LIGO/Virgo S200112r: Identification of a GW compact binary merger candidate\n\nThe LIGO Scientific Collaboration and the Virgo Collaboration report:\n\nWe identified the compact binary merger candidate S200112r during\nreal-time processing of data from LIGO Livingston Observatory (L1) and\nVirgo Observatory (V1) at 2020-01-12 15:58:38.094 UTC (GPS time:\n1262879936.094). The candidate was found by the GstLAL [1] analysis\npipeline.\n\nS200112r is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 1.3e-11 Hz, or about one in 1e3\nyears. The event's properties can be found at this URL:\nhttps://gracedb.ligo.org/superevents/S200112r\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), MassGap\n(<1%), or NSBH (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object has a mass < 3 solar masses (HasNS) is\n<1%. Using the masses and spins inferred from the signal, the\nprobability of matter outside the final compact object (HasRemnant) is\n<1%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n ��* bayestar.fits.gz,0, an initial localization generated by BAYESTAR\n[2], distributed via GCN notice about 2 minutes after the candidate\nevent time.\n ��* bayestar.fits.gz,1�� -- identical to bayestar.fits.gz,0\n\nThe preferred sky map at this time is bayestar.fits.gz,1. For the\nbayestar.fits.gz,1 sky map, the 90% credible region is 6199 deg2.\nMarginalized over the whole sky, the a posteriori luminosity distance\nestimate is 1136 +/- 320 Mpc (a posteriori mean +/- standard\ndeviation).\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] Messick et al. PRD 95, 042001 (2017)\n ��[2] Singer & Price PRD 93, 024013 (2016)",
  "circularId": 26715,
  "createdOn": 1578846438000,
  "email": "kats@ligo.mit.edu",
  "subject": "LIGO/Virgo S200112r: Identification of a GW compact binary merger candidate",
  "submitter": "Erik Katsavounidis at MIT  <kats@ligo.mit.edu>",
  "eventId": "LIGO/Virgo S200112r"
}