LIGO/Virgo S200213t: AT2020ciy/ZTF20aamvqxl, AT2020cjg/ZTF20aamvoxx and AT2020cje/ZTF20aamvtip 10.4m GTC spectroscopy
Abstract
Following the detection of AT2020ciy/ZTF20aamvqxl, AT2020cjg/ZTF20aamvoxx and AT2020cje/ZTF20aamvtip (Kasliwal et al. GCNC 27051) within the error area of the GW event S200213t (LVC, GCNC 27042), 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 Feb 13, 20:08 UT. Details follow: AT2020ciy/ZTF20aamvqxl, a magnitude r'=20.04 +/- 0.03 on 21:29UT is derived. The GTC spectrum is consistent with a SNIa at redshift z = 0.1018 +/- 0.0005. AT2020cjg/ZTF20aamvoxx, a magnitude r'=18.19 +/- 0.07 on 20:33UT is derived. The GTC spectrum is consistent with a SNIa at redshift z = 0.097 +/- 0.005. AT2020cje/ZTF20aamvtip, a magnitude r'=20.08 +/- 0.02 on 20:55UT is derived. The GTC spectrum is consistent with a SNIa at redshift z = 0.1512 +/- 0.0005. Therefore we consider that AT2020ciy/ZTF20aamvqxl, AT2020cjg/ZTF20aamvoxx and AT2020cje/ZTF20aamvtip are unrelated to the S200213t GW alert.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2020
- Bibcode:
- 2020GCN.27060....1V