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GCN Circular 22098

Subject
LIGO/Virgo G298936: NOT spectroscopy of GWFUNC-17ure
Date
2017-11-04T12:51:59Z (6 years ago)
From
Dong Xu at NAO/CAS <dxu@nao.cas.cn>
Dong Xu (NAOC), Evangelos-Dimitrios Paspaliaris, Sarel Jacobus van der 
Walt, Margerita Dahl, Sarah Savic Kallesoe, Zlatko Saldic, Markus Thor 
Rasmussen, Lasse Stampe Frolich, Simon Refshauge Papst, Martin Jan 
Sandberg, Johan P. U. Fynbo (NBI/UCPH), Anne Noer Kolborg (DTU), Frank 
Grundahl (Aarhus U.), Elena Pian (Bologna) report:

We obtained a spectrum of GWFUNC-17ure (Xu et al., LVC GCN 21675), an 
optical transient in the credible region of G298936 (LIGO/Virgo 
Collaboration, LVC GCN 21656), starting at 02:22:02.83 UT on 2017-08-25 
using the 2.56-m Nordic Optical Telescope (NOT) equipped with the ALFOSC 
imaging spectrograph.

Fitting to the supernova templates using SNID, the source is classified 
as a SN Ia at z=0.041 about 19 days after maximum, which indicates that 
this source is unrelated to the G298936 event. Our classification is 
consistent with the result in Steele et al. (LVC GCN 21691).
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