GRB 200228B: Liverpool Telescope imaging
Abstract
On 2020-02-29 UT we obtained imaging of the position of GRB 200228B (Fermi GBM team, GCN 27253; Laha et al., GCN 27254) using the 2m robotic Liverpool Telescope. We collected 3x120s of exposure time in each of the the i-band and z-band filters, beginning at 05:53:44 and ending at 06:07:33 (UTC). No unambiguous source is detected in either stacked image, although a possible marginal (~3-sigma) source is present close to the center of the latest enhanced XRT error circle in the z-band image. Photometry of this potential source (calibrating relative to PS1 catalog stars in the field) gives an approximate magnitude of z = 21.7 +/- 0.3. 3-sigma limits are: dt(days) filter mag 0.7794 i >22.6 0.7844 z >21.7 We additionally note that Pan-STARRS1 imaging of the field shows several faint, probably-resolved sources close to the survey detection limit inside or closely outside the XRT error circle, which could represent a possible host galaxy or host group. Imaging of the field is available at: http://www.astro.ljmu.ac.uk/~aridperl/grb/200228b/GRB200228B_LT_PS1.png (The enhanced XRT error circle is shown in cyan with the marginal "detection" highlighted in red.) DisclaimerNone
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2020
- Bibcode:
- 2020GCN.27271....1P