GRB100117A: possible afterglow from NOT observation.

Xu, D.; Malesani, D.; Leloudas, G.; Fynbo, J. P. U.; Djupvik, A. A.; Karjalainen, R.; Tanvir, N. R.; Jakobsson, P.
GRB Coordinates Network, Circular Service, 10337, 1 (2010)


We observed the field of GRB100117A (De Pasquale et al., GCN 10336) with the Nordic Optical Telescope equipped with StanCam and NOTCam, starting
at 21:26:40 UT on Jan 17th, 20.35 mins after the burst trigger. The observations were carried out at high airmass (~2) and in poor seeing.

In a 900 s R-band image, starting at 21:48:42 UT, we notice the presence of a faint, marginally significant object at coordinates:

RA(J2000)=00h 45m 04.75s
Dec(J2000)=-01d 35' 47.4"

with an error circle of 0.5 arcsec. If real, its magnitude is R = 22.5+/-0.5.

The co-addition of a series of K-band images doesn't show any convincing counterpart on the position.