GCN Circular 43758
Subject
EP260214b: DDOTI Optical Detection
Event
Date
2026-02-15T20:17:14Z (7 days ago)
From
Rosa L. Becerra at Instituto de Astronomía, UNAM <rbecerra@astro.unam.mx>
Via
Web form
Rosa L. Becerra (UNAM), Alan M. Watson (UNAM), Camila Angulo Valdez (UNAM), Nat Butler (ASU), Simone Dichiara (Penn State University), Tsvetelina Dimitrova (ASU), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), Océlotl López (UNAM), Margarita Pereyra (UNAM) and Eleonora Troja (U Roma) report:
We observe the field of EP260214b (Yang et al., GCN Circ. 43744) with the DDOTI/OAN wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir (http://ddoti.astroscu.unam.mx) on the night of 2026-02-15 UTC. DDOTI observed from 05:32 UTC to 13:08 UTC (T+8.9 h to T+16.5 h after the trigger), with a total exposure time of 3.7 hours. These observations were interleaved with other scientific programs.
Comparing our observations to the USNO-B1 and Pan-STARRS PS1 DR2 catalogues, we detect the optical counterpart reported by He et al. (GCN Circ. 43745), at preliminary AB magnitude of:
w = 21.08 +/- 0.23.
This value is consistent with previous observations reported (He et al., GCN Circ. 43745; Watson et al., GCN Circ. 43747; Pérez-Fournon et al., GCN Circ. 43750; Russeil et al., GCN Circ. 43752; Li et al., GCN Circ. 43755; Vijaykumar et al., GCN Circ. 43757) and is not corrected for the Galactic extinction.
We thank the staff of the Observatorio Astronómico Nacional on the Sierra of San Pedro Mártir.