TITLE: GCN CIRCULAR NUMBER: 11563 SUBJECT: GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT DATE: 11/01/13 11:12:38 GMT FROM: Dong Xu at Weizmann Inst J. P. U. Fynbo (DARK/NBI), D. Xu (WIS) report on behalf of a larger collaboration: We re-analyzed the 900s low signal-to-noise spectrum reported in our previous GCN #11522. We found that the brightest of the three weak emission features is due to bad removal of a cosmic ray hit. The two other features are close to sky emission lines. We thus conclude that the reported redshift of z=0.4 in GCN #11522 for this event is not secure and may be wrong. Deep spectroscopic observations from 8-10 m telescopes are strongly encouraged. We apologize for the confusing this report may have caused. We also continued photometric follow-ups of the optical counterpart of GRB 101225A at NOT, and obtained 6x600 s R-band images on Jan. 9 with a good seeing ~0.65". The object decayed to m(R)=24.5+/-0.2 compared to m(R)=24.1+/-0.1 on Jan. 5 in GCN #11519. However, this time it was largely pointlike, which is at odds with being found significantly extended along the northwest-southeast direction on Jan. 5. The decay in brightness and the variation in morphology indicates that the underlying host galaxy, if any, still hasn't dominated the optical counterpart. Further photometric and spectroscopic observations are underway.