TITLE: GCN CIRCULAR NUMBER: 38912 SUBJECT: EP250108a / AT 2025kg: LCO optical observations DATE: 25/01/11 22:31:07 GMT FROM: luca.izzo@inaf.it
L. Izzo (INAF-OACn and DARK/NBI) reports:
We observed the field of EP250108A (Li et al., GCN #38861) / AT 2025kg (the "kangaroo"; Zhu et al., GCN #38908) with the Sinistro instrument mounted on the 1-m telescope of the LCO network, located at the Sutherland Observatory, South Africa. Observations started on 2025 January 11 at 20:59 UT (3.35 days after the EP trigger). We obtained a series of 3x300 s images in the SDSS-G and SDSS-r filters.
At the location of AT 2025kg (Eyles-Ferris, GCN #38878; Zhu et al., GCN #38885; Malesani et al., GCN #38902; Kumar et al., GCN #38907; Levan et al., GCN #38909) we detect the source in both stacked images. We measure preliminary magnitudes of g = 20.49 +/- 0.10 mag, and r = 20.61 +/- 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. We also acknowledge the use of the ECSnoopy package by E. Cappellaro.
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