TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2851 SUBJECT: Optical Transient in Lynx not a GRB DATE: 04/12/16 14:39:00 GMT FROM: George Djorgovski at Caltech/Palomar S. G. Djorgovski, A. Gal-Yam (Caltech) and P. Price (IfA/UH) report: We obtained a spectrum of the apparent counterpart of the OT in Lynx, reported by Christensen et al. (GCN 2849), using LRIS spectrograph on the WMKO Keck-1 telescope, on UT 2004 Dec 16.6. The object is a probable M dwarf with a prominent H-alpha emission line. The colors of the proposed counterpart in the SDSS archive are also consistent with a late-type star. Therefore, the transient was most likely an unusually strong stellar flare associated with this star, and not a GRB or any other exotic type of an event. This note can be cited.