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 -39.348 sec. to 191.284 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -2.02682 ( -0.146305 0.140997 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.02682 ( -0.140997 0.146305 )
Norm@50keV : 1.07745E-03 ( -9.79231e-05 9.62159e-05 )
------------------------------------------------------------
Photon flux (15-150 keV) in 230.6 sec: 0.163655 ( -0.011443 0.011455 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.29525e-06 ( -1.9186e-07 1.95498e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -39.348 sec. to 191.284 sec.
XSPEC: quit
Photon index: -1.78432 ( -0.327625 0.595415 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78432 ( -0.595415 0.327625 )
Epeak [keV] : 37.6667 ( -32.6442 -37.6666 )
Norm@50keV : 1.47876E-03 ( -0.000633115 0.00170776 )
------------------------------------------------------------
Photon flux (15-150 keV) in 230.6 sec: 0.161468 ( -0.012368 0.006193 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.23064e-06 ( -2.31979e-07 2.25196e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 54.592 sec. to 55.592 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.93019 ( -0.550931 0.461585 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93019 ( -0.461585 0.550931 )
Norm@50keV : 4.29825E-03 ( -0.00150003 0.00139847 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.624944 ( -0.158371 0.158384 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95412e-08 ( -1.25613e-08 1.32887e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 54.592 sec. to 55.592 sec.
XSPEC: quit
Photon index: -1.42993 ( -0.746774 2.69589 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42993 ( -2.69589 0.746774 )
Epeak [keV] : 49.9023 ( )
Norm@50keV : 8.23236E-03 ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.615942 ( -0.1614 0.161513 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.79857e-08 ( -1.27398e-08 1.22613e-08 ) ergs/cm2
Time-resolved spectra
