TITLE:   GCN CIRCULAR
NUMBER:  33776
SUBJECT: GRB 230510A: LCOGT Optical Upper Limit
DATE:    23/05/12 00:51:38 GMT
FROM:    Robert Strausbaugh at University of Minnesota <rstrausb@umn.edu>

R. Strausbaugh (University of Minnesota), A. Cucchiara (NASA) report on

behalf of a larger collaboration:

We observed the GRB 230510A (Eyles-Ferris et al., GCN 33752) field
with the LCOGT
1-meter Sinistro instrument at the Teide Observatory, Tenerife site, on May
11, from 03:03 to 03:36 UT (corresponding to 14.95 to 15.50 hours from the
GRB trigger time) with the SDSS r and i filters.

We performed a series of 3x300s exposures in each band.  We do not detect a
source within the Swift-XRT enhanced error region (Evans et al., GCN 33756)
in either band, consistent with fading from the optical afterglow candidate
(Jiang et al., GCN 33761).

The following upper limits are calculated using the PanSTARRS catalog as
reference:


r > 21.5

i > 19.8

These magnitudes are not corrected for galactic extinction.