TITLE: GCN CIRCULAR NUMBER: 38031 SUBJECT: GRB 241030A: Optical Observations via Virtual Telescope Project DATE: 24/11/01 11:24:15 GMT FROM: Gianluca Masi at Virtual Telescope Project <gianluca@bellatrixobservatory.org> Gianluca Masi, Virtual Telescope Project (Italy), reports: We observed the field of GRB 241030A (Klingler et al., GCN 37956; Beardmore et al., GCN 37962; Wang et al., GCN 37972; Pillera et al., GCN 37979; Ridnaia et al., GCN 37982; Ambrosi et al., GCN 37988; Wu et al., GCN 37997) with the 17”-432mm robotic unit available at the Virtual Telescope Project facility in Manciano, Italy, equipped with a KAF-6303E based CCD camera. We collected 16, 300-second unfiltered exposures, then we averaged them. The central time of the resulting stack was 31 Oct. 2024, 18:27:50 UTC, that is about 36.8 hours after the burst. We clearly detect the optical counterpart of GRB 241030A (Klingler et al., GCN 37956). The position of the source is RA: 22 52 33.52; Decl.: +80 26 59.5 (J2000.0, mean residuals of 0.15”, reference stars from GaiaDR2) and the magnitude was estimated to be 19.9 (SNR=5, assuming R mags for the reference stars from GaiaDR2). The image is available here: https://www.virtualtelescope.eu/wordpress/wp-content/uploads/2024/11/GRB2410... View this GCN Circular online at https://gcn.nasa.gov/circulars/38031. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...