[vsnet-grb-info 25051] GRB 200215A: LCO Optical Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27150
SUBJECT: GRB 200215A: LCO Optical Upper Limits
DATE:    20/02/20 05:44:06 GMT
FROM:    Robert Strausbaugh at U. of the Virgin Islands  <robert.strausbaugh at uvi.edu>

R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (U. of the Virgin Islands/College of Marin) report on behalf of a larger collaboration:

We observed Swift GRB 200215A (Bernardini et al., GCN 27079) with the LCO 1-m Sinistro instrument at the McDonald Observatory, Texas, USA site, on February 16, from 01:37 to 01:46 UT (corresponding to 10.97 to 11.12 hours from the GRB trigger time) with the Bessel I filter.

We performed a series of 3x120s exposures. We do not detect any sources in the individual frames (nor in stacked images) in the Swift error region.  Using the USNO-B.1 catalog as reference, we obtain the following 3-sigma upper limit:

I > 18.8

R.S. is funded by NSF AST grant #1831682