{
  "bibcode": "2019GCN.26492....1C",
  "body": "A. J. Castro-Tirado, Y.-D. Hu (IAA-CSIC), A. F. Valeev and V. V. Sokolov \n(SAO-RAS), E. Fernandez-Garcia (IAA-CSIC), I. Carrasco and A. Castellon \n(UMA), M. D. Caballero-Garcia (ASU-CAS) and S. Geier (GRANTECAN, IAC, \nULL), on behalf of a larger collaboration, report:\n\nFollowing the detection of AT2019wnh/ZTF19acymaru, \nAT2019wnk/ZTF19acylvus and AT2019wrt/ZTF19acyldun (Andreoni et al.,\nGCNC 26424, Stein et al. GCNC 26437) within the error area of the GW \nevent S191213g (LVC, GCNC 26402), we obtained optical spectra covering \nthe range 3700-7400 A with the 10.4m GTC telescope equipped with OSIRIS \nin La Palma (Spain) starting on Dec 18, 01:02 UT. Details follow:\n\nFor AT2019wnh/ZTF19acymaru, a magnitude r'= 19.97 +/- 0.02 at 01:02 UT \nis derived. The GTC spectrum is consistent with a SN Ia at redshift z = \n0.167 +/- 0.005.\n\nFor AT2019wnk/ZTF19acylvus, a magnitude r'= 19.08 +/- 0.02 at 01:22 UT \nis derived. The GTC spectrum is consistent with a SN Ia at redshift z = \n0.1036 +/- 0.005.\n\nFor AT2019wrt/ZTF19acyldun (also reported by Xu et al. GCNC 26450 and \nOates et al. GCNC 26471), a magnitude r'= 18.45 +/- 0.01 at 01:38 UT is \nderived. It is located in the arm of the host galaxy showing a blue \ncontinuum and Balmer emission lines at redshift z = 0.057. Hence we \nconsider it is a LBV in the nearby galaxy. The detection of the object \non archival PanStarrs images (one taken in the g-band in Aug 2012) \nconfirms the variability of the transient prior to its current LBV \neruption.\n\nTherefore we consider that AT2019wnh/ZTF19acymaru, \nAT2019wnk/ZTF19acylvus and AT2019wrt/ZTF19acyldun are unrelated to the \nS191213g GW alert.",
  "circularId": 26492,
  "createdOn": 1576709536000,
  "email": "ajct@iaa.es",
  "subject": "LIGO/Virgo S191213g: AT2019wnh, AT2019wnk and AT2019wrt 10.4m GTC spectroscopy",
  "submitter": "Alberto J. Castro-Tirado at IAA-CSIC  <ajct@iaa.es>",
  "eventId": "LIGO/Virgo S191213g"
}