D. Xu (WIS, DARK/NBI), D. Malesani, G. Leloudas, J.P.U. Fynbo
(DARK/NBI), A.A. Djupvik, R. Karjalainen (NOT), N.R. Tanvir (U.
Leicester), P. Jakobsson (Univ. of Iceland) report on behalf of a larger
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 =
The co-addition of a series of K-band images doesn't show any convincing
counterpart on the position.