TITLE: GCN CIRCULAR NUMBER: 44400 SUBJECT: The EP-WXT trigger 01709258652: Mondy optical observations DATE: 26/04/23 13:31:19 GMT FROM: Alina Volnova at IKI RAS <alinusss@gmail.com> M. Chutchikova (HSE), A. Volnova (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), N. Pankov (IKI) report on behalf of IKI-GRB-FuN: We observed the EP-WXT trigger 01709258652 (Yang et al., GCN 43849) with the AZT-33IK 1.5m telescope of the Mondy observatory starting on 2026-02-26 (UT) 21:07:17, i.e., ~8 hours after the trigger, and taking several 120-seconds frames in the R band. The photometry of suggested flare star LP 435-538 (High Proper Motion Star; Yang et al., GCN 43849; Wu et al., GCN 43857; Fang et al., GCN 43889) do no exhibit any significant variability within 1 hour of our observations. Preliminary photometry and observational details are the following: Date UT start t-T0 Exp. Filter Obj. Err. UL Site/Telescope (mid,days) (n*s) (3sigma) 2026-02-26 21:07:17 0.32452 30*120 R 14.10 0.01 23.2 Mondy/AZT-33IK The photometry is based on nearby USNO-B1.0 stars (R2-magnitudes) and is not corrected for Galactic extinction. Our measured R magnitude is consistent with the photometry of the USNO-B1.0 star 1099-00207147 (R2 = 14.16) corresponding by the coordinates to LP 435-538. View this GCN Circular online at https://gcn.nasa.gov/circulars/44400. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...