batgrbproduct Analysis for Trigger=114893

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sat Jan  5 00:34:51 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger114893/SDC
======================================================================

  Trigger: 00114893      Segment: 000

  BAT Trigger Time: 135514834.112   [s; MET]
      Trigger Stop: 135514835.136   [s; MET]
               UTC: 2005-04-18T11:00:34.629320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 44.3414527693041   Dec: -18.5378750599418  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    18
     Image Trigger?:     NO
     Rate S/N Ratio:     39.6358423652128  [ if not an image trigger ]
     Image S/N Ratio:    18

  Flight Position:   [ source = BAT ]
    RA: 44.3414527693041   Dec: -18.5378750599418  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 44.3379903009031   Dec: -18.5403506434004  [deg; J2000]  
        { 02h 57m 21.1s , -18d 32' 25.3" }
         +/- 0.794964377310231 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.229984770379248 [arcmin] (formal 1-sigma fit error)
    SNR: 42.216172332463
    RA  =   2h 57m 21.1s  (44.337990 deg.)
    Dec = -18d 32' 25" (-18.540351 deg.)
 
  Angular difference between Flight and Ground position is 0.246696 arcmin
 
  Partial Coding Fraction: 0.359375    [ including projection effects ]

  Duration
     T90: 82.3120000064373 +/- 1.95342981001946
        Measured from: -5.08799999952316
                   to: 77.2240000069141     [s; relative to TRIGTIME]
     T50: 60.891999989748 +/- 3.00621024253394
        Measured from: 1.12800002098083
                   to: 62.0200000107288     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.719999998807907     
                   to: 1.71999999880791     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.35199999809265     
                   to: 86.4280000030994     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.426030   3.092490   2.159620   0.449704
           0.082972   0.084244   0.072833   0.059302 [error]
 Peak      0.085454   0.143102   0.174858   0.036142
           0.009876   0.010826   0.010724   0.007653 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 8.79e-07 1.42e-06 1.73e-06 4.14e-06 5.21e-06 8.16e-06   erg/cm2
              Error 5.89e-08 5.47e-08 7.56e-08 4.10e-07 1.83e-07 4.52e-07   erg/cm2
Peak flux Power-law 9.12e-01 1.15e+00 1.05e+00 1.68e+00 3.68e+00 4.79e+00   ph/cm2/s
              Error 1.36e-01 1.06e-01 8.14e-02 2.74e-01 2.84e-01 3.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.24e-07 1.45e-06 1.77e-06 2.86e-06 5.12e-06 6.82e-06   erg/cm2
              Error 7.66e-08 6.09e-08 8.55e-08 9.69e-07 2.04e-07 9.82e-07   erg/cm2
Peak flux Cutoff-PL 7.95e-01 1.18e+00 1.13e+00 1.08e+00 3.63e+00 4.19e+00   ph/cm2/s
              Error 1.76e-01 1.16e-01 1.14e-01 4.89e-01 2.90e-01 5.72e-01   ph/cm2/s
 
Fluence        Band 8.06e-07 1.44e-06 1.76e-06 3.37e-06 5.10e-06 6.89e-06   erg/cm2
              Error 8.17e-08 6.66e-08 9.47e-08 7.64e-07 2.04e-07 0.00e+00   erg/cm2
Peak flux      Band 7.90e-01 1.19e+00 1.13e+00 1.26e+00 3.61e+00 4.38e+00   ph/cm2/s
              Error 1.81e-01 1.20e-01 1.13e-01 4.90e-01 2.87e-01 5.93e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.713    0.065    -      -           5.94e-03 2.04e-04   35.180 57
CPL   1.421    0.275     106.6  218.0      8.14e-03 2.42e-03   31.677 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.127    0.123    -      -           3.17e-02 2.33e-03   43.995 57
CPL   0.609    0.556     158.2 2214.0      5.36e-02 3.16e-02   41.152  0
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 74.112000 sec.
T50 in the 50-300 keV band: 49.728000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   94.780   -8.352   86.428
T90    82.312   -5.088   77.224
T50    60.892    1.128   62.020
Peak    1.000    0.720    1.720

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   44.3380 -18.5404 0.0045   39.4 -133.8       8.1996    42.2  TRIG_00114893       
------------------------------------------
 
Foreground time interval of the image:
 -8.352  86.428 (delta_t =  94.780 [sec])
Background time interval of the image:
-177.811  -8.352 (delta_t = 169.459 [sec])

Lightcurves

Notes:

1 s binning

From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval

64 ms binning

Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -8.352 sec. to   86.428 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71332     ( -6.530678E-02   6.553710E-02) )
Norm@50keV  : 5.939794E-03    ( -2.042470E-04   2.041324E-04) )
------------------------------------------------------------
 Chi-Squared =      35.18023     using    59 PHA bins.
 Reduced chi-squared =     0.6171971     for     57 degrees of freedom
 Null hypothesis probability = 0.990
 
Photon flux (15-150 keV)    in 94.78 sec: 0.792577 ( -0.031009  0.031171 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.20694e-06 ( -1.83153e-07  1.83807e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -8.352 sec. to   86.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42128     ( -0.284778   0.266056 )
Epeak [keV] : 106.582      ( -28.2206 407.747 )
Norm@50keV  : 8.138601E-03    ( -1.987602E-03   2.848012E-03) )
------------------------------------------------------------
 Chi-Squared =      31.67732     using    59 PHA bins.
 Reduced chi-squared =     0.5656665     for     56 degrees of freedom
 Null hypothesis probability = 0.996
 
Photon flux (15-150 keV)    in 94.78 sec: 0.775052 ( -0.034408  0.034427 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.11643e-06 ( -2.05246e-07  2.02109e-07 ) ergs/cm2
 
Band function
Time interval is from   -8.352 sec. to   86.428 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.36129   ( -0.314427   0.823422 )
beta        : -1.96701    ( -8.03299   0.254098 )
Epeak [keV] : 93.6273      ( -51.7239 303.371 )
Norm@50keV   : 8.762579E-03    ( -2.536480E-03   2.069223E-02) )
------------------------------------------------------------
 Chi-Squared =      31.43396     using    59 PHA bins.
 Reduced chi-squared =     0.5715266     for     55 degrees of freedom
 Null hypothesis probability = 0.996
 
Photon flux (15-150 keV)    in 94.78 sec: 0.772845 ( -0.035667  0.034721 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.09915e-06 ( -2.0463e-07  2.04099e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.720 sec. to    1.720 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12680     ( -0.124413   0.122337 )
Norm@50keV  : 3.166099E-02    ( -2.332339E-03   2.326176E-03) )
------------------------------------------------------------
 Chi-Squared =      43.99526     using    59 PHA bins.
 Reduced chi-squared =     0.7718467     for     57 degrees of freedom
 Null hypothesis probability = 0.896
 
Photon flux (15-150 keV)    in 1.000 sec: 3.68260 ( -0.28399  0.28471 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.28225e-07 ( -2.4941e-08  2.5019e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.720 sec. to    1.720 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 0.608703     ( -0.598775   0.513338 )
Epeak [keV] : 158.209      ( -54.9263 4373.07 )
Norm@50keV  : 5.356286E-02    ( -2.098694E-02   4.214987E-02) )
------------------------------------------------------------
 Chi-Squared =      41.15197     using    59 PHA bins.
 but latest trial   1.12045     gives Chi-Squared =   3.32344
 but latest trial  3.257514E-02 gives Chi-Squared =   2.73821
 Reduced chi-squared =     0.7348566     for     56 degrees of freedom
 Null hypothesis probability = 0.931
 
Photon flux (15-150 keV)    in 1.000 sec: 3.62679 ( -0.28946  0.29013 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.25114e-07 ( -2.585e-08  2.5694e-08 ) ergs/cm2
 
Band function
Time interval is from    0.720 sec. to    1.720 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.734329   ( -9.26567   0.749898 )
beta        : -1.77224    ( -8.22776   11.4097 )
Epeak [keV] : 198.387      ( -140.214 702.106 )
Norm@50keV   : 4.635072E-02    ( -2.370575E-02   0.318217 )
------------------------------------------------------------
 Chi-Squared =      41.37731     using    59 PHA bins.
 Reduced chi-squared =     0.7523147     for     55 degrees of freedom
 Null hypothesis probability = 0.913
 
Photon flux (15-150 keV)    in 1.000 sec: 3.61238 ( -0.28071  0.29233 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.24927e-07 ( -2.5878e-08  2.5639e-08 ) ergs/cm2
 
Plot creation:
Sat Jan  5 00:51:38 EST 2008