GCN Circular 22230
Subject
GRB 171209A: Lulin 1m telescope observations
Date
2017-12-10T17:59:29Z (6 years ago)
From
Albert Kong at NTHU <akhkong@gmail.com>
GRB 171209A: Lulin 1m telescope observations
A.K.H. Kong (NTHU, Taiwan) reports
We observed the field of GRB 171209A (LaPorte et al. GCN 22213) with
the 1m telescope at the Lulin Observatory in Taiwan. The observations
were done with the SDSS r and i filters and the first observation were
started at 2017-12-09 20:20:16 UT (5.6 hours post burst). We detect
the optical afterglow identified by the UVOT and LCO (Guidorzi et al.
GCN 22214). We obtained the following magnitudes:
Start time Exposure Filter Magnitude (AB)
20:20:16 300s SDSS-r 19.47+/-0.11
20:25:50 300s SDSS-i 18.97+/-0.09
The magnitudes were calibrated with nearby Pan-STARRS objects.