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GRB 170903A

Measurement Value Units
Swift Trigger Time Sept. 3, 2017, 7:49 a.m. UT Modify
Swift Trigger Number 770528 None Modify
BAT RA (J2000) 254.532 deg Modify
BAT Dec (J2000) 34.985 deg Modify
BAT 90% Error Radius 1.3 arcmin Modify
BAT T90 29.2 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) 1.94 None Modify
XRT Time to First Observation 3117.48 sec Modify
UVOT Time to First Observation 3484.0 sec Modify
UVOT Magnitude V>1.7 None Modify
UVOT Other Filter Magnitudes B>20.5|U>21.0|UVW1>20.7|UVM2>20.4|UVW2>21.8|White>21.6 None Modify
Swift Comments Due to an observing constraint, Swift did not slew until T0+49.5 minutes.|UVOT: no detection None Modify
Swift Burst Advocate Craig Markwardt None Modify
XRT RA (J2000) 254.526 deg Modify
XRT Dec (J2000) 34.9790833333 deg Modify
XRT 90% Error Radius 1.4 arcsec Modify
XRT Initial Temporal Index -0.02095 None Modify
XRT Spectral Index (Gamma) 2.20256 None Modify
XRT Column Density (NH) 5.491716 10^21 cm^-2 Modify
BAT 1-sec Peak Photon Flux (15-150 keV) 3.9 ph/cm^2/sec Modify
XRT 11 Hour Flux (0.3-10 keV) 0.170673356 10^-11 erg/cm^2/s Modify
XRT 24 Hour Flux (0.3-10 keV) 0.088446029 10^-11 erg/cm^2/s Modify
Other Observatory Detections Fermi (GBM) None Modify
Redshift 0.886 None Modify
Host Galaxy i-band (AB) = 23.17 (GTC) None Modify

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