LIGO/Virgo S191205ah: AT2019wfa 10.4m GTC spectroscopy
Abstract
Following the detection of Gaia19fmm (AT2019wfa, Kostrzewa-Rutkowska et al. GCNC 26397) within the error area of the GW event S191205ah (LVC, GCNC 26350), we obtained optical spectra covering the range 3700-7400 A with the 10.4m GTC telescope equipped with OSIRIS in La Palma (Spain) starting on Dec 12, 21:00 UT. For Gaia19fmm/AT2019wfa a magnitude r' = 18.01 +/- 0.02 on MJD 58829.8727669 is derived. The GTC spectrum is consistent with a SN Ia 3-4 days before maximum at redshift z = 0.0599 +/- 0.0005 derived from the emission lines of the host galaxy. Therefore we consider that Gaia19fmm/AT2019wfa is unrelated to the S191205ah GW alert.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- December 2019
- Bibcode:
- 2019GCN.26405....1H