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GCN Circular 34112

Subject
GRB 230628E: LCOGT Optical Upper Limit
Date
2023-06-29T00:32:59Z (a year ago)
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 230628E (Klingler et al., GCN 34110) field with the LCOGT
1-meter Sinistro instrument at the Cerro Tololo Interamerican Observatory,
Chile site, on June 28, from 23:08 to 23:40 UT (corresponding to 0.70 to
1.23 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 error region (Klingler et al., GCN 34110) in
either band.

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

r > 19.2

i > 19.0

These magnitudes are not corrected for galactic extinction.

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