TITLE: GCN CIRCULAR NUMBER: 37361 SUBJECT: GRB 240825A: SOAR observations DATE: 24/08/31 13:26:09 GMT FROM: James Freeburn at Swinburne University of Technology <jamesfreeburn54@gmail.com> J. Freeburn (Swinburne/OzGrav) and I. Andreoni (UNC/UMD/NASA) We observed the field of GRB 240825A (The Fermi GBM team, GCN 37273; Gupta et al., GCN 37274; Lalla et al., GCN 37288; Evans et al., 37290; Gropp et al., GCN 37294; Joshi et al., GCN 37298; Sharma et al., GCN 37301; Frederiks et al., GCN 37302; Wang and Xiong, GCN 37315; Moss et al., GCN 37355) with the Goodman High Throughput Spectrograph mounted on the SOAR telescope in imaging mode. We took one 300s exposure each in filters g,r and i between 2024-08-31T04:45:51 and 2024-08-31T05:00:23 UTC. We place upper limits on the optical counterpart to GRB 240825A (Gupta et al., GCN 37274; Jiang et al., GCN 37275; Dutton et al., GCN 37276; Odeh et al., GCN 37277; Zhang et al., GCN 37278; Li et al., GCN 37280; Izzo et al., GCN 37287; Lipunov et al., GCN 37289; Leonini et al., GCN 37291; Wu et al., GCN 37292; Martin-Carrillo et al., GCN 37293; Brivio et al., GCN 37295; Kuin et al., GCN 37296; Odeh et al., GCN 37299; Le Floc'h et al., GCN 37300; Guiffreda et al., GCN 37303; Zheng et al., GCN 37304; Wang et al., GCN 37306; Maksut et al., GCN 37307; Melandri et al., GCN 37310; Romanov, GCN 37335; Moskvitin et al., GCN 37336; Qiu et al., GCN 37338). Zeropoints for each filter were measured using the Pan-STARRS1 catalogue. Our AB magnitude 5-sigma upper limits are as follows: g > 23.2 r > 23.1 i > 22.8 View this GCN Circular online at https://gcn.nasa.gov/circulars/37361. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...