{
  "bibcode": "2019GCN.25253....1C",
  "body": "A. J. Castro-Tirado (IAA-CSIC), A. F. Valeev and V. V. Sokolov \n(SAO-RAS), Y.-D. Hu and E. Fernandez-Garcia (IAA-CSIC), I. Carrasco and \nA. Castellon (UMA), P. Zarco-Villegas (SMA), X.-Y. Li (NIAOT) and P. \nPessev (GRANTECAN, IAC, ULL), on behalf of a larger collaboration, \nreport:\n\nFollowing the detection of AT2019lzt (Andreoni et al., GCNC 24235) \nwithin the error area of the GW event S190728q (LVC, GCNC 25187), we \nobtained imaging and optical spectra (1200s) covering the range \n3700-7500 A with the 10.4m GTC telescope equipped with OSIRIS in La \nPalma (Spain) starting on Aug 2, 04:15 UT.\n\nAT2019lzt magnitude on Aug 2, 03:50 UT was measured to be r = 21.13 +/- \n0.02. The AT2019lzt spectrum (broad lines) is consistent with a SN Ia at \n4 days post maximum at the nearby host galaxy redshift (z = 0.193 +/- \n0.001, based on the narrow emission lines from the galaxy).\n\nTherefore AT2019lzt is unrelated to the GW event S190728q.",
  "circularId": 25253,
  "createdOn": 1564733083000,
  "email": "ajct@iaa.es",
  "subject": "LIGO/Virgo S190728q: AT2019lzt 10.4m GTC spectroscopy",
  "submitter": "Alberto J. Castro-Tirado at IAA-CSIC  <ajct@iaa.es>",
  "eventId": "LIGO/Virgo S190728q"
}