{
  "bibcode": "2020GCN.26688....1L",
  "body": "The LIGO Scientific Collaboration and the Virgo Collaboration report:\n\nWe have conducted further analysis of the LIGO Livingston Observatory\n(L1) and Virgo Observatory (V1) data around the time of the compact\nbinary merger (CBC) candidate S200105ae (GCN Circulars 26640,\n26657). Parameter estimation has been performed using LALInference [1]\nand a new sky map, LALInference.fits.gz,0, distributed via GCN Notice,\nis available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S200105ae\n\nThe preferred sky map at this time is LALInference.fits.gz,0. For the\nLALInference.fits.gz,0 sky map, the 90% credible region is 7373 deg2.\nMarginalized over the whole sky, the a posteriori luminosity distance\nestimate is 283 +/- 74 Mpc (a posteriori mean +/- standard deviation).\n\nBased on posterior support from parameter estimation [1], under the\nassumption that the candidate S200105ae is astrophysical in origin,\nthe probability that the lighter compact object has a mass < 3 solar\nmasses (HasNS) is 98%. Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%.\n\nThere is no change to our assessment of the significance of the\ncandidate.  As noted in the previous Circulars, our examination of the\ndata indicates that the signal has greater significance than what was\ncalculated in real-time processing (and is still contained in the GCN\nNotice), sufficient to warrant a public alert.\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] Veitch et al. PRD 91, 042003 (2015)",
  "circularId": 26688,
  "createdOn": 1578593847000,
  "email": "pshawhan@umd.edu",
  "subject": "LIGO/Virgo S200105ae: Updated Sky Localization and EM-Bright Probabilities",
  "submitter": "Peter Shawhan at U of Maryland/LSC  <pshawhan@umd.edu>",
  "eventId": "LIGO/Virgo S200105ae"
}