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GCN Circular 32945

Subject
GRB 221115B: LCOGT Optical Upper Limits
Date
2022-11-17T21:13:24Z (2 years 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 221115B (DeLaunay et al., GCN 32941) field with the
LCOGT 1-meter Sinistro instrument at the South African Astronomical
Observatory site, on November 16, from 19:40 to 20:08 (corresponding to
34.15 to 34.62 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
any fading uncatalogued sources in the BAT error region, in either band,
consistent with other optical upper limits (de Wet et al., GCN 32943).

The following upper limits are calculated using the Pan-STARRS catalog as
reference:

r > 22.4
i > 21.5

These magnitudes are not corrected for galactic extinction.
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