GRB 241030A: COLIBRI Continuing Detection of the Afterglow

We imaged again the field of GRB 241030A detected by Fermi/GBM, Swift/BAT, and Swift/XRT (Fermi GBM Team, GCN Circ. 37955; Klingler et al., GCN Circ. 37956) during the commissioning of the COLIBRÍ (SVOM/F-GFT) telescope at the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir in Mexico. We observed with the engineering test camera in a red filter that approximates SDSS r. The data were reduced using custom software and then analysed and calibrated against the PS1 catalog using the STDWeb service (Karpov et al. 2022). In 1200 seconds of exposure from 2024-10-31 01:46:50 to 02:10:56 UTC (0.83 to 0.85 days after the trigger), we detect the optical counterpart with an AB magnitude of: r = 19.95 +/- 0.06 This magnitude is consistent with the last optical observations reported (GCN Circ. 37993, 37976, 37966 ). Further observations are planned. We warmly thank the COLIBRI engineering team and the staff of the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir