{
  "bibcode": "2020GCN.27988....1L",
  "body": "The LIGO Scientific Collaboration and the Virgo\nCollaboration report:\n\n*** This is a test of the Early Warning alert system\nresulting from archival O3 data. Times and sky\nlocalizations are fictitious. ***\n\nWe identified the compact binary merger candidate\nMS200618bx during real-time processing of data from LIGO\nHanford Observatory (H1) and LIGO Livingston Observatory\n(L1) at 2020-06-18 12:18:10.329 UTC (GPS time:\n1276517908.329). The candidate was found by the GstLAL\n[1] analysis pipeline in the early warning configuration.\nAn Early Warning GCN Notice was issued 54 seconds before\nthe projected merger time. The GCN Notice included the\nstandard data products associated with CBC alerts, namely\nlocalization [2] and source classification [3].\n\nHowever, this Early Warning alert (MS200618bx) is no\nlonger of interest because it was not detected by the\nregular, full-bandwidth search.\n\n[1] Messick et al. PRD 95, 042001 (2017)\n[2] Singer & Price PRD 93, 024013 (2016)\n[3] Chatterjee et al. The Astrophysical Journal 896, 1 (2020)",
  "circularId": 27988,
  "createdOn": 1592572149000,
  "email": "ryan.magee@ligo.org",
  "subject": "LIGO/Virgo MS200618bx: Retraction of a test binary neutron star candidate",
  "submitter": "Ryan Magee at LVC  <ryan.magee@ligo.org>"
}