TITLE:   GCN CIRCULAR
NUMBER:  25419
SUBJECT: LIGO/Virgo S190814bv: AT2019nqq 10.4m GTC spectroscopy
DATE:    19/08/20 22:18:45 GMT
FROM:    Alberto J. Castro-Tirado at IAA-CSIC  <ajct@iaa.es>

O. Lopez-Cruz (INAOE), A. J. Castro-Tirado (IAA-CSIC), L. Macri (TAMU),
A. F. Valeev (SAO-RAS), E. Rios-Lopez (INAOE), Y.-D. Hu (IAA-CSIC), M.
Diaz (UTRGV), E. Fernandez-Garcia (IAA-CSIC), V. Chabushyan (INAOE), A.
Castellon (UMA), A. Watson (UNAM) and J. Font Serra (GRANTECAN, IAC,
ULL), on behalf of three larger collaborations (including TOROS),
report:

Following the detection of AT2019nqq (Herner et al., GCNC 25373, 25398)
within the error area of the GW event S190814bv (LVC, GCNC 25324), we
obtained imaging and optical spectra covering the range 3700-10000 A
with the 10.4m GTC telescope equipped with OSIRIS in La Palma (Spain)
starting on Aug 20, 03:30 UT.

The AT2019nqq spectrum (broad lines) is consistent with a SN IIP at 4
days post maximum at the nearby host galaxy redshift (z = 0.071 +/-
0.001, based on the narrow emission lines from the galaxy).

Therefore we consider that AT2019nqq is unrelated to the GW event
S190814bv.