General information
GRB 260115A was detected at 2026-01-15 17:46:45 UT by Fermi/GBM and independently observed by GECAM-B and AstroSat CZTI. A BALROG analysis provides a sky position near RA 112.0 deg, Dec 7.9 deg with a few-degree statistical uncertainty, and rapid MASTER-Net imaging reported only optical upper limits.
Wavelength coverage
- Gamma-ray / hard X-ray: Detected by Fermi/GBM; observed by GECAM-B (70–6000 keV) and AstroSat CZTI (weakly in 100–500 keV veto).
- Optical: MASTER-Net follow-up beginning ~77 s after trigger reports non-detections with limits reaching ~18.5 mag (clear).
No observations were mentioned in X-ray, UV, near-IR, radio, or GeV (LAT) bands.
Lightcurve and spectrum
- Duration: GECAM-B reports T90 = 4.8 (+2.4/-1.4) s (70–6000 keV).
- Timing: AstroSat CZTI reports a light-curve peak at 2026-01-15 17:46:47.72 UTC.
- Spectrum: GECAM-B time-averaged spectrum (T0-1 to T0+4 s) fit with a power law, photon index = -2.2 (+0.3/-0.4).
- Fluence: GECAM-B fluence (10–1000 keV) = (2.8 +0.7/-0.4)×10^-6 erg cm^-2 over T0-1 to T0+4 s.
Redshift
What’s special vs typical