TITLE:   GCN CIRCULAR
NUMBER:  37756
SUBJECT: GRB 241010A: LCO optical observations
DATE:    24/10/10 15:22:57 GMT
FROM:    luca.izzo@inaf.it

L. Izzo (INAF-OACn and DARK/NBI) and D. B. Malesani (DAWN/NBI and Radboud Univ.) report:

We observed the field of the GRB 241010A (Dichiara et al., GCN #37755) with the Sinistro instrument mounted on the 1-m telescope of the LCO network, located at the McDonald Observatory, TX, United States. Observations started on 2024 October 10th at 11:47:59 UT (1.74 hr after the GRB trigger). We obtained a series of 3x180 s images in the SDSS-r filter.

In the stacked r-band, we detect the optical afterglow within the error box of the Swift-UVOT afterglow (Dichiara, GCN #37755). We measure a preliminary magnitude of r = 19.64 +/- 0.11 mag (AB), calibrated against nearby stars from the Pan-STARRS catalog.
  
This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 101004719.