TITLE: GCN CIRCULAR NUMBER: 6054 SUBJECT: GRB 070125: An IR Point Source and an Apparent Host Galaxy DATE: 07/01/30 07:22:11 GMT FROM: Josh Bloom at UC Berkeley J. S. Bloom (UC Berkeley), D. Starr (UC Berkeley), and C. H. Blake (CfA/Harvard) report on behalf of a larger collaboration: For 11136 sec between 2007 Jan 28 02:54 UTC and 2007 Jan 28 09:37 we observed the field of GRB 070125 (Hurley et al. 6024) with the PAIRITEL 1.3m in Mt Hopkins, Arizona. Consistent with the afterglow position reported in Cenko & Fox (GCN 6028) we detect a faint (apparent point-like) source in J, H, and Ks band. The preliminary magnitudes are: J = 18.82 ± 0.26 H = 18.33 ± 0.25 Ks = 17.86 ± 0.25 This source appears to be embedded in the Eastern edge of an apparent galaxy, extending ~2.5" to the West from the OT; we associate this as the host galaxy of GRB 070125. At the Western edge of the "host" there is faint knot at position 07:51:17.49, +31:09:03.4 (J2000). Few Swift GRB hosts are detected with similar integration times on PAIRITEL and those that have been are uniformly low redshift. Given this and the previous observational evidence for a low z (Prochaska et al. 6031, 6032; Marshall et al. 6041), we continue to urge long- term monitoring of GRB 070125 in search of any associated supernova. A finder may be grabbed at: http://lyra.berkeley.edu/~jbloom/grb070125.ps.gz This message may be cited.