TITLE: GCN CIRCULAR NUMBER: 37052 SUBJECT: GRB 240805B: LCOGT Optical Upper Limits DATE: 24/08/05 19:37:57 GMT FROM: Robert Strausbaugh at Eastern Illinois University rstrausbaugh@eiu.edu
R. Strausbaugh (Eastern Illinois University), A. Cucchiara (NASA) report on behalf of a larger collaboration:
We observed the Swift GRB 240805B field (Williams et al., GCN 37043) with the LCOGT 1-meter Sinistro instrument at the South African Astronomical Observatory site, on August 5, from 18:01 to 18:34 UT (corresponding to 3.55 to 4.10 hours after 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 uncataloged source within the XRT error region in either band. This result is consistent with other optcal upper limits (Zhu et al., GCN 37050; Lipunov et al., GCN 37051).
The following 5-sigma upper limits are calculated using the PanSTARRS catalog as reference:
r > 21.1 i > 20.5
These magnitudes are not corrected for galactic extinction.
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