GCN Circular 20601
Subject
GRB 170202A: SQUEAN Observation (2nd night)
Date
2017-02-04T11:15:37Z (7 years ago)
From
Myungshin Im at Seoul Nat U <mim@astro.snu.ac.kr>
Myungshin Im, Yongjung Kim, & Joonho Kim (CEOU/SNU)
We continued the observation of the GRB 170202A afterglow with the SQUEAN
instrument on the 2.1m Otto Struve telescope at the McDonald Observatory,
Texas. The 2nd night observation started at 2017-02-04 09:45:52 UT,
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about 39.3 hours after the BAT alert.
The afterglow shows the following preliminary magnitude based on the
photometry calibration using SDSS stars in the vicinity.
Filter Mag (AB) Mag_err Exp.time Start-time (UT)
r 21.8 0.15 180s x 10 09:45:52���