TITLE: GCN CIRCULAR NUMBER: 38385 SUBJECT: EP241126a: NOT optical observations DATE: 24/11/29 22:23:22 GMT FROM: Daniele B. Malesani at IMAPP / Radboud University d.malesani@astro.ru.nl
Daniele B. Malesani (DAWN/NBI and Radboud Univ.), Peter G. Jonker (Radboud Univ.), Franz E. Bauer (PUC), Maria E. Ravasio (Radboud Univ.), Jonathan Quirola-Vasquez (Radboud Univ.), Javi Sanchez-Sierras (Radboud Univ.), Andrew J. Levan (Radboud Univ. and Warwick Univ.), on behalf of a larger collaboration, and Jacco H. Terwel (NOT and TCD), report:
We observed the optical counterpart (Fu et al., GCN 38337; Li et al., GCN 38338; Geng et al., GCN 38357; Qiu et al., GCN 38378) of the X-ray transient EP241126a (Hu et al., GCN 38335; Zheng et al., GCN 38339), using the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. Observations were carried out in the SDSS r band and were unfortunately affected by "non-ideal" seeing (>2.5"). The mean time of our observation was 2024 Nov 27.836 UT, that is 24.4 hr after the EP trigger, and the total exposure time was 9x240 s.
The optical counterpart is marginally detected in our stacked image, with a magnitude r = 23.4 +- 0.3 (AB, calibrated against nearby sources from the Pan-STARRS catalog).
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