GCN Circular 26502
Subject
LIGO/Virgo S191205ah: AT2019wmy 10.4m GTC spectroscopy
Event
Date
2019-12-19T13:46:15Z (6 years ago)
From
Alberto J. Castro-Tirado at IAA-CSIC <ajct@iaa.es>
Y.-D. Hu (IAA-CSIC), A. F. Valeev (SAO-RAS), A. J. Castro-Tirado and E.
Fernandez-Garcia (IAA-CSIC), V. Sokolov (SAO-RAS), I. Carrasco and A.
Castellon (UMA) and S. Geier (GRANTECAN, IAC, ULL), on behalf of a
larger collaboration, report:
Following the detection of AT2019wmy/ZTF19acyiflj (Andreoni et al. GCNC
26416) within the error area of the GW event S191205ah (LVC, GCNC
26350), we obtained an optical spectrum covering the range 3700-7400 A
with the 10.4m GTC telescope equipped with OSIRIS in La Palma (Spain) on
Dec 18.
For AT2019wmy/ZTF19acyiflj, a magnitude r'= 19.79 +/- 0.05 at 06:35 UT
is derived. The GTC spectrum is consistent with a SN Ia at redshift z =
0.081 +/- 0.003.
Therefore we consider that AT2019wmy/ZTF19acyiflj is unrelated to the
S191205ah GW alert.