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GCN Circular 37012

Subject
EP240801a: SAO RAS optical observations
Date
2024-08-02T10:06:40Z (3 months ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
Via
legacy email
A. S. Moskvitin and O. I. Spiridonova (SAO RAS)
report on behalf of the GRB follow-up team.

We observed the field of the fast X-ray transient EP240801a
(Zhou et al., GCN 36997) with the SAO RAS 1-meter telescope Zeiss-1000
equipped with the CCD-photometer. We obtained 5 x 300 sec frames
in Rc band on 2024-08-01T23:55:51 -- 2024-08-02T00:54:48 (UTC),
t_mid - T0 = 15.32 hours.

The OT (Fu et al., GCN 36998; Li et al., GCN 36999; Zheng et al.,
GCN 37000; Aryan et al., GCN 37002; An et al., GCN 37004;
Perez-Fournon et al., GCN 37007; Malesani et al., GCN 37008;
Zhu et al., GCN 37010) is clearly detected in the stacked frame
with the brightness of R = 21.7 +/- 0.1, calibrated against nearby
Pan-STARRS stars and not corrected for Galactic extinction.

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