Sharapov, D.; Djupvik, A.; Pozanenko, A.; Cummings, J.
GRB Coordinates Network, Circular Service, 5267, 1 (2006)
We observed optical afterglow of GRB060512 (Cummings et al. GCN 5117; Klotz et al. GCN 5140) in Nordic Optical Telescope with NOTcam in near IR (J) on May 13 between (UT) 02.40 - 03:44. A brightness of the OT is following:
J mag, Err,Exposure, T0+ (Mid time,s)
18.90 0.09 8x90s 12838
18.96 0.09 8x90s 13849
19.09 0.10 8x90s 14843
19.14 0.11 8x90s 15835
The calibration is based on 2MASS star RA = 13:02:57.846 DEC =
+41:10:23.08, J = 14.485 +/-0.03 and consistent with calibration based on IR standard star observation in the same night. A power law decay index alpha ~ 1.1 in J between (UT) 02.40 - 03:44 (May ,13) is compatible with the index deduced from Ks observations (Hearty et al. GCN 5126, Tanaka et al. GCN 5129).
The first combined image of 8x90s exposure can be found in http://grb.rssi.ru/GRB060512/grb060512_NOT_J.jpg