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GRB 170921A

Measurement Value Units
Swift Trigger Time Sept. 21, 2017, 9:28 a.m. UT Modify
Swift Trigger Number 773509 None Modify
BAT RA (J2000) 26.84 deg Modify
BAT Dec (J2000) 30.88 deg Modify
BAT 90% Error Radius 1.8 arcmin Modify
BAT T90 28.9 sec Modify
BAT Fluence (15-150 keV) 6.7 10^-7 erg/cm^2 Modify
BAT Photon Index (15-150 keV) (PL = simple power-law) 1.76 None Modify
XRT Time to First Observation 97.31 sec Modify
UVOT Time to First Observation 100.0 sec Modify
UVOT Magnitude V>19.9 None Modify
UVOT Other Filter Magnitudes B>20.6|U>21.1|UVW1>20.6|UVM2>21.0|UVW2>21.0|White>21.4 None Modify
Swift Burst Advocate Antonino D'Ai None Modify
XRT RA (J2000) 26.8490416667 deg Modify
XRT Dec (J2000) 30.9067222222 deg Modify
XRT 90% Error Radius 1.5 arcsec Modify
XRT Initial Temporal Index -3.251 None Modify
XRT Spectral Index (Gamma) 2.76224 None Modify
XRT Column Density (NH) 10.506427 10^21 cm^-2 Modify
BAT 1-sec Peak Photon Flux (15-150 keV) 0.8 ph/cm^2/sec Modify
XRT 11 Hour Flux (0.3-10 keV) 0.014303868 10^-11 erg/cm^2/s Modify
XRT 24 Hour Flux (0.3-10 keV) 0.007396904 10^-11 erg/cm^2/s Modify
Other Observatory Detections HJT (1.5m), Insight-HXMT None Modify

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