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GRB 170912B

Measurement Value Units
Swift Trigger Time Sept. 12, 2017, 1:33 a.m. UT Modify
Swift Trigger Number 772052 None Modify
BAT RA (J2000) 215.464 deg Modify
BAT Dec (J2000) -61.997 deg Modify
BAT 90% Error Radius 1.0 arcmin Modify
BAT T90 19.6 sec Modify
BAT Fluence (15-150 keV) 24.0 10^-7 erg/cm^2 Modify
BAT Photon Index (15-150 keV) (PL = simple power-law) 1.88 None Modify
XRT Time to First Observation 50.28 sec Modify
UVOT Time to First Observation 60.0 sec Modify
UVOT Magnitude V>18.08 None Modify
UVOT Other Filter Magnitudes B>18.76|U>19.67|UVW1>18.24|UVM2>18.12|UVW2>18.39|White>20.72 None Modify
Swift Comments UVOT: no detection None Modify
Swift Burst Advocate Sam Laporte None Modify
XRT RA (J2000) 215.4585 deg Modify
XRT Dec (J2000) -61.9969166667 deg Modify
XRT 90% Error Radius 1.4 arcsec Modify
XRT Initial Temporal Index -0.6941 None Modify
XRT Spectral Index (Gamma) 1.65573 None Modify
XRT Column Density (NH) 40.5946 10^21 cm^-2 Modify
BAT 1-sec Peak Photon Flux (15-150 keV) 5.7 ph/cm^2/sec Modify
XRT 11 Hour Flux (0.3-10 keV) 0.0121931684 10^-11 erg/cm^2/s Modify
XRT 24 Hour Flux (0.3-10 keV) 0.00242268502 10^-11 erg/cm^2/s Modify
Other Observatory Detections Fermi (GBM) None Modify
XRT Early Flux (0.3-10 keV) 47.6 10^-11 erg/cm^2/s Modify

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