TITLE: GCN CIRCULAR NUMBER: 35467 SUBJECT: GRB 240102A: LCOGT Optical Upper Limits DATE: 24/01/03 01:01:40 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 240102A (Gropp et al., GCN 35461) field with the LCOGT 1-meter Sinistro instrument at the Teide Observatory, Tenerife site, on January 2, from 23:34 to January 3 00:07 UT (corresponding to 6.00 to 6.55 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 uncatalogued source within the XRT error region in either band. This result is consistent with other optical upper limits (Hu et al., GCN 35465). The following 5-sigma upper limits are calculated using the PanSTARRS catalog as reference: r > 22.9 i > 22.3 These magnitudes are not corrected for galactic extinction. View this GCN Circular online at https://gcn.nasa.gov/circulars/35467. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...