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GRB 170531B

Measurement Value Units
Swift Trigger Time May 31, 2017, 5:02 p.m. UT Modify
Swift Trigger Number 755354 None Modify
BAT RA (J2000) 286.901 deg Modify
BAT Dec (J2000) -16.414 deg Modify
BAT 90% Error Radius 1.5 arcmin Modify
BAT T90 164.13 sec Modify
BAT Fluence (15-150 keV) 20.0 10^-7 erg/cm^2 Modify
BAT Photon Index (15-150 keV) (PL = simple power-law) 1.95 None Modify
XRT Time to First Observation 140.9 sec Modify
UVOT Time to First Observation 152.0 sec Modify
UVOT Magnitude V>18.88 None Modify
UVOT Other Filter Magnitudes B>19.77|U>19.17|UVW1>18.91|UVM2>18.88|UVW2>19.14|White>21.03|White_fc=20.50 None Modify
Swift Burst Advocate Phil Evans None Modify
XRT RA (J2000) 286.883708333 deg Modify
XRT Dec (J2000) -16.4188611111 deg Modify
XRT 90% Error Radius 1.4 arcsec Modify
XRT Initial Temporal Index -0.7799 None Modify
XRT Spectral Index (Gamma) 2.06685 None Modify
XRT Column Density (NH) 4.31107e-12 10^21 cm^-2 Modify
UVOT RA (J2000) 286.88375 deg Modify
UVOT Dec (J2000) -16.4182777778 deg Modify
UVOT 90% Error Radius 0.1 arcsec 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) 0.03914964 10^-11 erg/cm^2/s Modify
XRT 24 Hour Flux (0.3-10 keV) 0.02130491 10^-11 erg/cm^2/s Modify
Other Observatory Detections MASTER-Kislovodsk, CrAO (Zeiss-1000), GTC (10.4m), MPG (2.2m), ISON/Terskol (0.8m), WHT (4.2m) None Modify
Redshift 2.366 None Modify
XRT Early Flux (0.3-10 keV) 273.0 10^-11 erg/cm^2/s Modify

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