TITLE: GCN CIRCULAR NUMBER: 38246 SUBJECT: GRB 241115A: LCOGT Optical Upper Limits DATE: 24/11/15 22:53:03 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 241115A field (Williams et al., GCN 38235) with the LCOGT 1-meter Sinistro instrument at the South African Astronomical Observatory site, on November 15, from 21:52 to 22:24 UT (corresponding to 8.57 to 9.10 hours after the GRB trigger time) with the sdss r and i filters.

We performed a series of 3x300s exposures in i- and r-bands. We do not detect a source within the Swift XRT error region in either band.

The following 5-sigma upper limits are calculated using the PanSTARRS catalog as reference:

r > 21.5 i > 21.2

These magnitudes are not corrected for galactic extinction.

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