GCN Circular 37913
Subject
GRB 241026A: Las Cumbres optical detection
Event
Date
2024-10-27T15:49:14Z (a year ago)
From
Manisha Shrestha at University of Arizona <mshrestha1@arizona.edu>
Via
Web form
M. Shrestha (Univ. of Arizona), D. Sand (Univ. of Arizona), K. D. Alexander (Univ. of Arizona), J. Andrews (Gemini), J. Pearson (Univ. of Arizona), K. Bostroem (Univ. of Arizona), D. A. Howell (LCO/UCSB), C. McCully (LCO/UCSB), M. Newsome (LCO/UCSB), C. Pellegrino (UV), J. Farah (LCO/UCSB) report on behalf of a wider Global Supernova Project collaboration:
We observed the field of GRB 241026A (Fermi GBM Team, GCN 37894; Melandri et al., GCN 37896, Evans et al., GCN 37897) with the Las Cumbres Observatory 1-m telescope at McDonald Observatory, on 2024-10-27T02:19:34.4 UT (60610.09 MJD, ~3.6 hours after the trigger) using the Sinistro instrument in r band. We clearly detect the optical counterpart within the error region of Swift XRT with:
r = 19.82 +-0.05 mag
These values were calculated with respect to the PS1 catalog (Tian et al. 2017). Magnitudes are not corrected for galactic extinction. This value is in agreement with Watson et al., GCN 37900, and Zheng et al., GCN 37903