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GCN Circular 33740

Subject
GRB 230506B: LCOGT Optical Upper Limits
Date
2023-05-07T15:34:37Z (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 230506B (Dichiara et al., GCN 33727) field with the
LCOGT 1-meter Sinistro instrument at the Teide Observatory, Tenerife site,
on May 7, from 04:09 to 04:41 UT (corresponding to 15.43 to 15.93 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
an uncatalouged source within the Swift-XRT error region in either band.

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

r > 22.3
i > 21.8

These magnitudes are not corrected for galactic extinction.

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