GCN Circular 23665
Subject
GRB 190106A: OSN Afterglow Observations
Event
Date
2019-01-09T20:55:41Z (7 years ago)
From
Alexander Kann at IAA-CSIC <kann@iaa.es>
M. Blazek, D. A. Kann (both HETH/IAA-CSIC), A. de Ugarte Postigo
(HETH/IAA-CSIC and DARK/NBI), L. Izzo, and K. Bensch (all HETH/IAA-CSIC)
report:
We observed the optical afterglow of GRB 190106A (e.g., Yurkov et al.,
GCN #23614), detected by Swift (Sonbas et al., GCN #23615), with with
the T150 telescope of the Sierra Nevada Observatory (OSN). We obtained
18 x 300 s images in the Ic band from 5.02 to 6.47 hours after the GRB.
The afterglow is well-detected in each single image. We find it decays
between the beginning and end of our observing run.
Days Ic mag error
0.2091 18.54 0.05
0.2696 18.73 0.06
Magnitudes are given in the AB system. They were measured vs. four SDSS
comparison stars, using the transformation equations of Lupton (2005),
and transformed back into AB mags.