LIGO/Virgo S200105ae: AT2020pq, AT2020ps and AT2020pv 10.4m GTC spectroscopy
Abstract
Following the detection of AT2020pq/ZTF20aaervyn, AT2020ps/ZTF20aaerqbx and AT2020pv/ZTF20aaertpj (Stein et al. GCNC 26673) within the error area of the GW event S200105ae (LVC, GCNC 26640), we obtained optical spectroscopy covering the range 3700-7400 A with the 10.4m GTC telescope equipped with OSIRIS in La Palma (Spain) starting on Jan 11, 06:03 UT. For AT2020pq/ZTF20aaervyn, the GTC spectrum is consistent with a SN Ia close to maximum, at redshift z = 0.112 +/- 0.004, consistent with the redshift of the host galaxy derived from the emission lines (z = 0.1146 +/- 0.0005). For AT2020ps/ZTF20aaerqbx, the GTC spectrum is consistent with a SN IIp about 5 days prior to maximum at redshift z = 0.098 +/- 0.016, consistent with the redshift of the host galaxy derived from the emission lines (z = 0.0780 +/- 0.0005). For AT2020pv/ZTF20aaertpj, the GTC spectrum is consistent with a SN Ib close to maximum at redshift z = 0.026 +/- 0.006, consistent with the redshift of the host galaxy derived from the emission lines (z = 0.0280 ± 0.0005). Therefore we consider that AT2020pq/ZTF20aaervyn, AT2020ps/ZTF20aaerqbx and AT2020pv/ZTF20aaertpj are unrelated to the S200105ae GW alert. This message can be quoted.
- Publication:
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GRB Coordinates Network
- Pub Date:
- January 2020
- Bibcode:
- 2020GCN.26703....1C