General information
Swift/BAT trigger 1439093 (designated GRB 260113A for naming continuity) is reported as likely not a true astrophysical event, pending full downlinked analysis. The on-board BAT position is RA=357.372 deg, Dec=+9.041 deg with a 3 arcmin (90%) uncertainty.
Wavelength coverage
- Gamma-ray: Swift/BAT triggered; marginal image significance (6.5 sigma) with tentative structure only in 15–25 keV.
- X-ray: Swift/XRT began at T0+136 s; no source detected in ~1.5 ks promptly downlinked data.
- Optical/UV: Swift/UVOT White finding chart at T0+139 s; no credible afterglow candidate; typical 3-sigma limit ~19.6 mag (sub-image covers ~25% of BAT error circle).
No observations were mentioned for radio, infrared, millimeter/sub-mm, or high-energy gamma-ray facilities beyond Swift/BAT.
Lightcurve and spectrum
- BAT: potential pulse-like structure reported in 15–25 keV, with nothing significant in other energy bands (limited on-board lightcurve information).
Redshift
What’s special vs typical
- The reporting team states the trigger is most likely a statistical/instrumental fluctuation despite being assigned a GRB name, due to marginal BAT significance and lack of an XRT counterpart.