General information
GRB 260601A was triggered and localized by Fermi/GBM at 11:00:12 UT on 2026-06-01, reported as a likely short GRB with an on-ground position near RA 15.06 deg, Dec +44.38 deg and ~2 deg statistical uncertainty.
Wavelength coverage
- Gamma-ray: Fermi/GBM detection with duration and spectral/fluence/peak-flux measurements reported.
- Optical: MASTER-OAGH/MASTER-Net observations starting ~327 s after trigger, reporting only upper limits (down to ~19.5 mag).
No X-ray, UV, radio, IR, or TeV observations were mentioned in the provided circulars.
Lightcurve and spectrum
- GBM light curve: single emission episode; T90 ~0.8 s (50–300 keV).
- Time-averaged spectrum (T0-0.07 to T0+0.34 s): cutoff power law with index -0.63 +/- 0.02 and Epeak 960 +/- 30 keV; Band fit also acceptable with Epeak 750 +/- 20 keV, alpha -0.57 +/- 0.05, beta -2.0 +/- 0.2.
- Fluence (10–1000 keV): (2.08 +/- 0.06)E-06 erg/cm^2; 64-ms peak photon flux (10–1000 keV): 40 +/- 1 ph/s/cm^2.
Redshift
What’s special vs typical