T. M��ller Bravo (Southampton), T.-W. Chen (Stockholm), M. Fraser (UCD), K. Maguire (TCD), P. Wiseman, M. Pursiainen (Southampton), G. Pignata (UNAB/MAS), I. Arcavi (Tel Aviv University), S. Benetti (INAF-Padova), J. Anderson (ESO), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), J. Tonry, L. Denneau, A. Heinze, H. Weiland, H. Flewelling (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, S. J. Smartt, O. McBrien, S. Srivastav (QUB):
ePESSTO+, the advanced Public ESO Spectroscopic Survey for Transient Objects (Smartt et al. 2015 2015A&A...579A..40S), reports the followup observations of the counterpart candidate AT2019wxt (=PS19hgw) (McLaughlin et al. AstroNote 2019-154; McBrien et al., GCN 26485) of S191213g (LIGO and Virgo collaboration, GCN 26402).
Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2019 December 19 00:50 UT (MJD=58836.035), using EFOSC2 and Grism 13 (3985-9315A, 18A resolution) with 1200 sec integration time.
In the preliminary reduced spectrum shows blue and featureless continuum, similar to the HCT (Dutta et al., GCN 26490), NOT (Izzo et al., GCN 26491) and LT (Srivastav & Smartt, GCN 26493) spectra. We detect a potential broad feature around 5400 - 6200 Angs (in observed frame). We also detecte a narrow H-alpha emission line at redshift 0.037, which is consistent with the distance of the host galaxy KUG 0152+311 (z = 0.036; Haynes et al. 1997, AJ 113, 1197).