TITLE: GCN CIRCULAR NUMBER: 17372 SUBJECT: GRB 150201A: GROND upper limits DATE: 15/02/02 14:54:42 GMT FROM: Fabian Knust at MPE/GROND F. Knust, T. Schweyer, J. Bolmer, J. Greiner (all MPE Garching) report on behalf of the GROND team: We observed the field of GRB 150201A (Swift trigger 629302; J. K. Cannizzo et al., GCN #17368) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile). Observations started at 00:47 UT on 2015-02-02, 11hrs after the GRB trigger. They were performed at an average seeing of 1.64" and at an average airmass of 2.1. We do not detect a source within the Swift-XRT error circle reported by J.P. Osborne et al. (GCN #17369) down to g' > 23.2 mag, r' > 23.1 mag, i' > 23.5 mag, z' > 23.6 mag, J > 21.5 mag, H > 21.0 mag, and K > 19.4 mag. The given limits are derived based on calibrating the images against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.012 in the direction of the burst (Schlegel et al. 1998).