GRB 210306A: MITSuME Akeno optical observation
Abstract
We observed the field of GRB 210306A (D'Elia et al. GCN #29597, Watson et al. GCN 29598, Romanov GCN #29599, Strausbaugh et al. GCN #29600, Ohno et al. GCN #29602, Hentunen et al. GCN #29603, Stecklum et al. GCN #29604, Veres et al. GCN #29605, Lipunov et al. GCN #29606, Zhu et al. GCN #29607) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan. The observation with a series of 60 sec exposures started at 2021-03-06 09:12:03 UT (5.3 hours after Swift BAT trigger). We stacked the images with good conditions. We marginally detected the point source at the position consistent with the afterglow detected previously(D'Elia et al. GCN #29597, Watson et al. GCN 29598, Romanov GCN #29599, Strausbaugh et al. GCN #29600, Hentunen et al. GCN #29603, Stecklum et al. GCN #29604, Zhu et al. GCN #29607). We measured the magnitudes as follows. T0+[hour] MID-UT T-EXP[sec] measured magnitudes ------------------------------------------------------------------------------------------------ 5.3 11:38:10 8160 g'=20.0+/-0.4, Rc=20.2+/-0.4, Ic=19.0+/-0.3 ------------------------------------------------------------------------------------------------ T0+ : Elapsed time after the burst T-EXP: Total Exposure time We used PS1 catalog for flux calibration. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. 2021, PASJ, Vol.73, Issue 1, Pages 4-24; https://github.com/MNiwano/Eclaire).
- Publication:
-
GRB Coordinates Network
- Pub Date:
- March 2021
- Bibcode:
- 2021GCN.29608....1H