GRB 180602A: MITSuME Okayama optical upper limits
Abstract
We observed the field of GRB 180602A (Cenko et al., GCN Circular #22752) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. The observation started on 2018-06-02 11:14:03.47 UT (~3 hours after the burst). We did not find any new point source within the enhanced XRT error circle (Osborne et al., GCN Circular #22753) in all the three bands. We obtained following limits for the magnitudes. T0+[hour] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------------------------------------------------------- ~3.07 ~11:18:47 420 >17.8 >17.7 >17.1 ------------------------------------------------------------------------------------------------------- T0+ : Elapsed time after the burst T-EXP: Total Exposure time We used GSC2.3 catalog for flux calibration.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2018
- Bibcode:
- 2018GCN.22754....1T