General information
GRB 260207A is a likely long-duration GRB detected by Fermi/GBM at 2026-02-07 05:42:33.65 UT, with an optical transient counterpart reported by MASTER and later coverage by TESS plus a faint, positionally consistent VLA radio source.
Wavelength coverage
- Gamma-ray: Fermi GBM detection and final localization.
- Optical: MASTER-OAFA early imaging and optical transient discovery; TESS field-of-view coverage and identification of a consistent counterpart.
- Radio: VLA 6 GHz detection of a faint source within the counterpart error region.
Bands with no observations mentioned: X-ray, UV, IR, sub-mm/mm, TeV.
Lightcurve and spectrum
- MASTER reported an unfiltered optical transient of ~17.3 mag, seen in 27 images with a typical decay and light-curve features, and later non-detection at MASTER-SAAO (confirming transient nature).
- VLA measured 24 ± 4 microJy/beam at 6 GHz at ~14 days post-burst.
Redshift
What’s special vs typical
- Very prompt ground-based optical counterpart discovery (minutes after trigger) and later independent identification in archival/serendipitous space-based TESS coverage, with an additional faint radio detection at a consistent position.