batgrbproduct Analysis for Trigger=313954

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Jun 16 13:21:38 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger313954/SDC
======================================================================

  Trigger: 00313954      Segment: 000

  BAT Trigger Time: 235048360.832   [s; MET]
      Trigger Stop: 235048361.088   [s; MET]
               UTC: 2008-06-13T11:12:37.968880    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 173.79663866518   Dec: -7.09837558340558  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.32
     Image Trigger?:     NO
     Rate S/N Ratio:     57.0087712549569  [ if not an image trigger ]
     Image S/N Ratio:    11.32

  Flight Position:   [ source = BAT ]
    RA: 173.79663866518   Dec: -7.09837558340558  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 173.803732587718   Dec: -7.10284254566892  [deg; J2000]  
        { 11h 35m 12.9s , -07d 06' 10.2" }
         +/- 0.586849751359351 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.195845376599898 [arcmin] (formal 1-sigma fit error)
    SNR: 65.1319681061261
 
  Angular difference between Flight and Ground position is 0.500231 arcmin
 
  Partial Coding Fraction: 0.890625    [ including projection effects ]

  Duration
     T90: 103.923999994993 +/- 34.3300104711878
        Measured from: -1.21199998259544
                   to: 102.712000012398     [s; relative to TRIGTIME]
     T50: 28.6720000207424 +/- 2.87971389830405
        Measured from: 7.18000000715256
                   to: 35.852000027895     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.22800001502037     
                   to: 3.22800001502037     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.283999979496     
                   to: 236.524000018835     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.245930   3.278172   2.630919   0.791917
           0.077417   0.078733   0.070784   0.062738 [error]
 Peak      0.061003   0.108280   0.137990   0.056869
           0.006388   0.007318   0.007519   0.006569 [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 6.96e-07 1.35e-06 2.03e-06 6.58e-06 5.70e-06 1.07e-05   erg/cm2
              Error 4.17e-08 4.61e-08 7.28e-08 5.53e-07 1.78e-07 5.88e-07   erg/cm2
Peak flux Power-law 5.14e-01 7.80e-01 8.87e-01 1.92e+00 2.75e+00 4.10e+00   ph/cm2/s
              Error 7.20e-02 6.58e-02 5.81e-02 2.84e-01 1.76e-01 3.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.95e-07 1.35e-06 2.03e-06 6.53e-06 5.70e-06 1.06e-05   erg/cm2
              Error 4.17e-08 4.62e-08 7.29e-08 5.49e-07 1.78e-07 5.85e-07   erg/cm2
Peak flux Cutoff-PL 5.13e-01 7.80e-01 8.88e-01 1.91e+00 2.75e+00 4.09e+00   ph/cm2/s
              Error 7.20e-02 6.58e-02 5.82e-02 2.82e-01 1.76e-01 3.03e-01   ph/cm2/s
 
Fluence        Band 6.58e-07 1.37e-06 2.02e-06 6.38e-06 5.65e-06 1.04e-05   erg/cm2
              Error 6.58e-08 5.23e-08 5.43e-08 5.68e-07 1.91e-07 6.53e-07   erg/cm2
Peak flux      Band 4.93e-01 7.84e-01 9.03e-01 1.66e+00 2.74e+00 3.84e+00   ph/cm2/s
              Error 9.11e-02 6.83e-02 7.36e-02 5.61e-01 1.81e-01 5.81e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.413    0.056    -      -           2.45e-03 7.12e-05   74.150 57
CPL   1.327    0.000     425.2    0.0      2.66e-03 7.15e-05   74.799 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.814    0.114    -      -           2.40e-02 1.55e-03   54.943 57
CPL   0.674    0.361     566.8 5000.0      2.75e-02 1.14e-02   54.629  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: 50.432000 sec.
T50 in the 50-300 keV band: 19.520000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  241.808   -5.284  236.524
T90   103.924   -1.212  102.712
T50    28.672    7.180   35.852
Peak    1.000    2.228    3.228

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  173.8037  -7.1028 0.0029   24.2    4.6       4.2391    65.1  TRIG_00313954       
------------------------------------------
 
Foreground time interval of the image:
 -5.284  16.773 (delta_t =  22.057 [sec])
Background time interval of the image:
-239.832  -5.284 (delta_t = 234.548 [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   -5.284 sec. to  236.524 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41304     ( -5.633187E-02   5.624282E-02) )
Norm@50keV  : 2.445371E-03    ( -7.122010E-05   7.122010E-05) )
------------------------------------------------------------
 Chi-Squared =      74.14983     using    59 PHA bins.
 Reduced chi-squared =      1.300874     for     57 degrees of freedom
 Null hypothesis probability = 6.305E-02
 
Photon flux (15-150 keV)    in 241.8 sec: 0.298694 ( -0.009496  0.009535 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.69848e-06 ( -1.77916e-07  1.78569e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -5.284 sec. to  236.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32744     (     )
Epeak [keV] : 425.180      (   )
Norm@50keV  : 2.664058E-03    ( -7.114559E-05   7.181545E-05) )
------------------------------------------------------------
 Chi-Squared =      74.79877     using    59 PHA bins.
 Reduced chi-squared =      1.335692     for     56 degrees of freedom
 Null hypothesis probability = 4.739E-02
 
Photon flux (15-150 keV)    in 241.8 sec: 0.298546 ( -0.009492  0.00953 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.69901e-06 ( -1.78062e-07  1.78545e-07 ) ergs/cm2
 
Band function
Time interval is from   -5.284 sec. to  236.524 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.943992   ( -10.0308   2.65867 )
beta        : -1.43639    ( -7.832420E-02   6.567371E-02) )
Epeak [keV] : 72.1949      ( -37.1811 609.981 )
Norm@50keV   : 4.897789E-03    ( -1.647272E-02   158.534 )
------------------------------------------------------------
 Chi-Squared =      72.87495     using    59 PHA bins.
 Reduced chi-squared =      1.324999     for     55 degrees of freedom
 Null hypothesis probability = 5.366E-02
 
Photon flux (15-150 keV)    in 241.8 sec: 0.294710 ( -0.011407  0.005571 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.65188e-06 ( -1.8974e-07  1.91385e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    2.228 sec. to    3.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.814194     ( -0.115054   0.112413 )
Norm@50keV  : 2.398002E-02    ( -1.557495E-03   1.548614E-03) )
------------------------------------------------------------
 Chi-Squared =      54.94322     using    59 PHA bins.
 Reduced chi-squared =     0.9639161     for     57 degrees of freedom
 Null hypothesis probability = 0.553
 
Photon flux (15-150 keV)    in 1.000 sec: 2.75482 ( -0.17581  0.17601 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.7857e-07 ( -1.8927e-08  1.904e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.228 sec. to    3.228 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.674066     ( -0.482996   0.239958 )
Epeak [keV] : 566.837      ( -566.827 9433.16 )
Norm@50keV  : 2.752966E-02    ( -6.779529E-03   1.601771E-02) )
------------------------------------------------------------
 Chi-Squared =      54.62928     using    59 PHA bins.
 but latest trial  2.427116E-02 gives Chi-Squared =  0.305809
 Reduced chi-squared =     0.9755228     for     56 degrees of freedom
 Null hypothesis probability = 0.527
 
Photon flux (15-150 keV)    in 1.000 sec: 2.75412 ( -0.17576  0.17597 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.77027e-07 ( -1.8508e-08  1.9536e-08 ) ergs/cm2
 
Band function
Time interval is from    2.228 sec. to    3.228 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.836893   ( -9.16311   5.83689 )
beta        : -0.814194    ( -0.112406   0.115105 )
Epeak [keV] : 14.7009      ( -14.6009 9985.30 )
Norm@50keV   : 3.536689E-02    ( -1.179882E-02   50912.1 )
------------------------------------------------------------
 Chi-Squared =      54.94320     using    59 PHA bins.
 Reduced chi-squared =     0.9989673     for     55 degrees of freedom
 Null hypothesis probability = 0.477
 
Photon flux (15-150 keV)    in 1.000 sec: 2.73979 ( -0.18161  0.18055 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.76914e-07 ( -1.9848e-08  1.9612e-08 ) ergs/cm2
 
Plot creation:
Mon Jun 16 13:54:26 EDT 2008