General information
COLIBRÍ imaged the field of EP260323a/EP 260623a about 3.5 hours after the trigger and detected the optical counterpart previously reported by Las Cumbres. The source is noted to lie near the southern edge of Sh 2-113, where moderate extinction may contribute.
Wavelength coverage
- Optical/NIR: COLIBRÍ/DDRAGO obtained g, r, i, z, and y imaging, detecting the counterpart in all bands with AB magnitudes g=18.73±0.04, r=18.30±0.01, i=18.00±0.01, z=17.78±0.03, and y=17.55±0.03.
- X-ray/high-energy: The event is associated with an EP trigger, but no EP measurements are given in the provided circular.
No observations are mentioned in radio, millimeter, ultraviolet, neutrino, or gravitational-wave bands.
Lightcurve and spectrum
- Observations were obtained from 2026-06-23T06:23:26 to 06:37:31 UTC, corresponding to 3.49 to 3.69 hours after the trigger.
- The reported photometry is not corrected for Galactic extinction.
Redshift
No numerical redshift is reported. COLIBRÍ states that detection in all bands suggests this is a low-redshift event.
What’s special vs typical
The main notable feature is a bright, rapidly identified optical counterpart detected across five bands, with the reporting team suggesting a low-redshift nature. The lack of a spectrum or numerical redshift keeps the event from being clearly exceptional based on the provided text.