General information
IceCube Alert 260505A (trigger No. 58544625) was followed up by the MASTER-Kislovodsk robotic telescope about ~1 day after the notice/trigger time, with no optical transient reported in the covered fields.
Wavelength coverage
- Optical: MASTER-Kislovodsk clear (unfiltered, C) imaging with multiple 60 s exposures; non-detections with upper limits up to ~19.2 mag.
No observations were mentioned in gamma-ray, X-ray, UV, IR, radio, gravitational waves, or other messengers.
Lightcurve and spectrum
- Optical (C band): a sequence of 60 s exposures at 2026-05-05 22:08:12–22:21:46 UT (Tmid−T0 ≈ 89842–90656 s) giving upper limits ranging from ~12.7–13.6 mag for some pointings and ~19.0–19.2 mag for others; no detections reported.
Redshift
What’s special vs typical