Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -8.820 sec. to 229.076 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.6079 ( -0.0462334 0.046169 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60790 ( -0.046169 0.0462334 )
Norm@50keV : 5.03621E-03 ( -0.000117471 0.000117463 )
------------------------------------------------------------
Photon flux (15-150 keV) in 237.9 sec: 0.648793 ( -0.017439 0.017513 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11958e-05 ( -2.70461e-07 2.70806e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.820 sec. to 229.076 sec.
XSPEC: quit
Photon index: -1.53349 ( -0.101333 0.184252 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53349 ( -0.184252 0.101333 )
Epeak [keV] : 345.794 ( -345.801 -345.801 )
Norm@50keV : 5.44326E-03 ( -0.000496635 0.00112127 )
------------------------------------------------------------
Photon flux (15-150 keV) in 237.9 sec: 0.644519 ( -0.02001 0.019447 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11354e-05 ( -3.05961e-07 3.04598e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 10.180 sec. to 11.180 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.13804 ( -0.0712034 0.0715814 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13804 ( -0.0715814 0.0712034 )
Norm@50keV : 7.81800E-02 ( -0.00323421 0.00323324 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.476923 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.0783e-07 ( -3.63761e-08 3.64568e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.180 sec. to 11.180 sec.
XSPEC: quit
Photon index: -0.772387 ( -0.287296 0.306874 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.772387 ( -0.306874 0.287296 )
Epeak [keV] : 190.276 ( -61.5992 427.094 )
Norm@50keV : 0.114545 ( -0.0290724 0.0417011 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 8.97285 ( -0.4025 0.40272 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.94877e-07 ( -3.83403e-08 3.82093e-08 ) ergs/cm2
Time-resolved spectra
