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GCN Circular 37463

Subject
GRB 240910A: NOT optical observations
Date
2024-09-12T01:32:55Z (2 months ago)
From
Daniele B. Malesani at IMAPP / Radboud University <d.malesani@astro.ru.nl>
Via
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Daniele B. Malesani (DAWN/NBI and Radboud Univ.), Ben Gompertz (Birmingham) & Niilo Koivisto (NOT and UTU) report on behalf of a larger collaboration:

We observed the optical counterpart (Julakanti et al., GCN 37459; Jiang et al., GCN 37460; D'Ai et al., GCN 37461) of GRB 240910A (Fermi GBM team, GCN 37441; Zhang et al., GCN 37445) using the Nordic Optical Telescope (NOT) located in the Canary Islands. Observations began at high airmass, as soon as the target became observable.

In a 300 s image taken in the r band with mean time Sep 11.98 UT (1.425 days after the trigger), we measure for the optical counterpart a magnitude r = 21.4 +- 0.1 AB, calibrated against nearby Pan-STARRS objects.
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