batgrbproduct Analysis for Trigger=238108

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 11:20:43 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger238108/GCN5_download_cron
======================================================================

  Trigger: 00238108      Segment: 000

  BAT Trigger Time: 184852042.88   [s; MET]
      Trigger Stop: 184852044.928   [s; MET]
               UTC: 2006-11-10T11:47:21.318140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 336.30368447156   Dec: -2.26672228601831  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.33
     Image Trigger?:     NO
     Rate S/N Ratio:     8  [ if not an image trigger ]
     Image S/N Ratio:    7.33

  Flight Position:   [ source = BAT ]
    RA: 336.30368447156   Dec: -2.26672228601831  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 336.286351548792   Dec: -2.25807764720602  [deg; J2000]  
        { 22h 25m 08.7s , -02d 15' 29.1" }
         +/- 1.1502705818452 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.419450518823472 [arcmin] (formal 1-sigma fit error)
    SNR: 24.9035476255895
    RA  =  22h 25m  8.7s  (336.286352 deg.)
    Dec =  -2d 15' 29" (-2.258078 deg.)
 
  Angular difference between Flight and Ground position is 1.161417 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 40.744000017643 +/- 4.02450144817196
        Measured from: -6.24000000953674
                   to: 34.5040000081062     [s; relative to TRIGTIME]
     T50: 19.972000002861 +/- 2.82510530180052
        Measured from: 0.724000006914139
                   to: 20.6960000097752     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 9.74400001764297     
                   to: 10.744000017643     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.7960000038147     
                   to: 38.5     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.629453   0.684768   0.462086   0.083501
           0.034409   0.035303   0.033217   0.033837 [error]
 Peak      0.027522   0.022394   0.018770   0.004458
           0.005101   0.005333   0.004966   0.004895 [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 1.71e-07 2.84e-07 3.57e-07 8.97e-07 1.06e-06 1.71e-06   erg/cm2
              Error 1.84e-08 1.75e-08 3.33e-08 1.84e-07 7.58e-08 2.09e-07   erg/cm2
Peak flux Power-law 1.96e-01 1.79e-01 1.13e-01 1.09e-01 5.34e-01 5.98e-01   ph/cm2/s
              Error 7.11e-02 4.09e-02 4.18e-02 8.39e-02 1.21e-01 1.46e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.71e-07 2.84e-07 3.58e-07 8.90e-07 1.06e-06 1.71e-06   erg/cm2
              Error 1.84e-08 1.75e-08 3.34e-08 1.83e-07 7.58e-08 2.08e-07   erg/cm2
Peak flux Cutoff-PL 1.96e-01 1.79e-01 1.13e-01 1.09e-01 5.34e-01 5.97e-01   ph/cm2/s
              Error 5.22e-02 4.09e-02 4.19e-02 8.34e-02 1.21e-01 1.43e-01   ph/cm2/s
 
Fluence        Band 1.71e-07 2.85e-07 3.60e-07 9.03e-07 1.07e-06 1.75e-06   erg/cm2
              Error 1.35e-08 2.69e-08 3.70e-08 2.61e-07 9.54e-08 3.61e-07   erg/cm2
Peak flux      Band 1.96e-01 1.79e-01 1.13e-01 1.09e-01 5.34e-01 5.97e-01   ph/cm2/s
              Error 7.11e-02 4.21e-02 4.19e-02 1.06e-01 1.21e-01 1.45e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.668    0.124    -      -           2.42e-03 1.59e-04   40.251 57
CPL   1.609    0.414     322.5    0.0      2.57e-03 1.60e-04   40.423 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.663    0.468    -      -           4.07e-03 1.12e-03   62.763 57
CPL   1.614    0.000     325.1    0.0      4.36e-03 8.85e-03   62.842 56
 
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: 37.952000 sec.
T50 in the 50-300 keV band: 18.816000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   47.296   -8.796   38.500
T90    40.744   -6.240   34.504
T50    19.972    0.724   20.696
Peak    1.000    9.744   10.744

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  336.2864  -2.2581 0.0078    6.3   43.8       1.6040    24.9  TRIG_00238108       
------------------------------------------
 
Foreground time interval of the image:
 -8.796  28.021 (delta_t =  36.817 [sec])
Background time interval of the image:
-239.880  -8.796 (delta_t = 231.084 [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   -8.796 sec. to   38.500 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66769     ( -0.123163   0.124881 )
Norm@50keV  : 2.420261E-03    ( -1.601691E-04   1.585030E-04) )
------------------------------------------------------------
 Chi-Squared =      40.25061     using    59 PHA bins.
 Reduced chi-squared =     0.7061511     for     57 degrees of freedom
 Null hypothesis probability = 0.955
 
Photon flux (15-150 keV)    in 47.30 sec: 0.317894 ( -0.019622  0.019676 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06287e-06 ( -7.52685e-08  7.62381e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -8.796 sec. to   38.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60934     ( -0.379156   0.449233 )
Epeak [keV] : 322.514      (   )
Norm@50keV  : 2.573584E-03    ( -1.559611E-04   1.647966E-04) )
------------------------------------------------------------
 Chi-Squared =      40.42267     using    59 PHA bins.
 Reduced chi-squared =     0.7218334     for     56 degrees of freedom
 Null hypothesis probability = 0.942
 
Photon flux (15-150 keV)    in 47.30 sec: 0.317751 ( -0.019613  0.019667 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06282e-06 ( -7.5259e-08  7.62712e-08 ) ergs/cm2
 
Band function
Time interval is from   -8.796 sec. to   38.500 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.40001   ( -8.59999   6.40001 )
beta        : -1.66768    ( -0.124942   0.123132 )
Epeak [keV] : 18.7315      ( -18.6315 9981.27 )
Norm@50keV   : 5.105969E-03    ( -5.105969E-03   0.304744 )
------------------------------------------------------------
 Chi-Squared =      40.25063     using    59 PHA bins.
 Reduced chi-squared =     0.7318296     for     55 degrees of freedom
 Null hypothesis probability = 0.932
 
Photon flux (15-150 keV)    in 47.30 sec: 0.317907 ( -0.019299  0.019076 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06956e-06 ( -7.1073e-08  1.19636e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    9.744 sec. to   10.744 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66292     ( -0.450201   0.485043 )
Norm@50keV  : 4.073055E-03    ( -1.159049E-03   1.081258E-03) )
------------------------------------------------------------
 Chi-Squared =      62.76345     using    59 PHA bins.
 Reduced chi-squared =      1.101113     for     57 degrees of freedom
 Null hypothesis probability = 0.279
 
Photon flux (15-150 keV)    in 1.000 sec: 0.534130 ( -0.121431  0.12143 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78276e-08 ( -1.09411e-08  1.15641e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    9.744 sec. to   10.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61391     (     )
Epeak [keV] : 325.103      (   )
Norm@50keV  : 4.357510E-03    ( -1.011062E-03   1.669361E-02) )
------------------------------------------------------------
 Chi-Squared =      62.84234     using    59 PHA bins.
 Reduced chi-squared =      1.122185     for     56 degrees of freedom
 Null hypothesis probability = 0.247
 
Photon flux (15-150 keV)    in 1.000 sec: 0.533937 ( -0.121394  0.121393 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78268e-08 ( -1.09459e-08  1.15628e-08 ) ergs/cm2
 
Band function
Time interval is from    9.744 sec. to   10.744 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.25315   ( -8.74685   3.93797 )
beta        : -1.66748    ( -8.33252   0.453843 )
Epeak [keV] : 32.5497      ( -32.4497 9967.45 )
Norm@50keV   : 9.392577E-03    ( -9.392576E-03   0.670472 )
------------------------------------------------------------
 Chi-Squared =      62.75396     using    59 PHA bins.
 Reduced chi-squared =      1.140981     for     55 degrees of freedom
 Null hypothesis probability = 0.221
 
Photon flux (15-150 keV)    in 1.000 sec: 0.533936 ( -0.121392  0.121394 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.76209e-08 ( -1.05708e-08  1.15725e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 11:37:12 EST 2008