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GRB 170428A

Measurement Value Units
Swift Trigger Time April 28, 2017, 4:13 a.m. UT Modify
Swift Trigger Number 750298 None Modify
BAT RA (J2000) 330.051 deg Modify
BAT Dec (J2000) 26.913 deg Modify
BAT 90% Error Radius 1.2 arcmin Modify
BAT T90 0.2 sec Modify
BAT Fluence (15-150 keV) 2.8 10^-7 erg/cm^2 Modify
BAT Photon Index (15-150 keV) (PL = simple power-law) 0.76 None Modify
XRT Time to First Observation 84.63 sec Modify
UVOT Time to First Observation 740.0 sec Modify
UVOT Magnitude V>20.0 None Modify
UVOT Other Filter Magnitudes B>21.0|U>19.5|UVW1>19.5|UVM2>20.UVW2>20.0 None Modify
Swift Comments UVOT: no detection None Modify
Swift Burst Advocate Andy Beardmore None Modify
XRT RA (J2000) 330.078125 deg Modify
XRT Dec (J2000) 26.9158055556 deg Modify
XRT 90% Error Radius 2.3 arcsec Modify
XRT Initial Temporal Index -1.026 None Modify
XRT Spectral Index (Gamma) 2.97704 None Modify
XRT Column Density (NH) 3.852532 10^21 cm^-2 Modify
BAT 1-sec Peak Photon Flux (15-150 keV) 2.8 ph/cm^2/sec Modify
XRT 11 Hour Flux (0.3-10 keV) 0.0042248808 10^-11 erg/cm^2/s Modify
XRT 24 Hour Flux (0.3-10 keV) 0.00189823788 10^-11 erg/cm^2/s Modify
Other Observatory Detections Konus-Wind, MPG (2.2m), HJT (1.5m), DCT (4.3m), TNG (3.6m), DOT (3.6m) None Modify

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