batgrbproduct Analysis for Trigger=323984

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sun Sep  7 13:13:25 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger323984/SDC
======================================================================

  Trigger: 00323984      Segment: 000

  BAT Trigger Time: 242400799.424   [s; MET]
      Trigger Stop: 242400800.448   [s; MET]
               UTC: 2008-09-06T13:33:16.347220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 227.890126999499   Dec: -80.4861395765144  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.72
     Image Trigger?:     NO
     Rate S/N Ratio:     10.6301458127346  [ if not an image trigger ]
     Image S/N Ratio:    6.72

  Flight Position:   [ source = BAT ]
    RA: 227.890126999499   Dec: -80.4861395765144  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 228.05211929383   Dec: -80.5419207132193  [deg; J2000]  
        { 15h 12m 12.5s , -80d 32' 30.9" }
         +/- 1.51197335403637 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.612788752845814 [arcmin] (formal 1-sigma fit error)
    SNR: 16.8510417633008
 
  Angular difference between Flight and Ground position is 3.710444 arcmin
 
  Partial Coding Fraction: 0.59375    [ including projection effects ]

  Duration
     T90: 142.472000002861 +/- 18.7492722151846
        Measured from: -69.8079999983311
                   to: 72.66400000453     [s; relative to TRIGTIME]
     T50: 40.272000014782 +/- 5.84014520920662
        Measured from: 2.25999999046326
                   to: 42.5320000052452     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0639999806880951     
                   to: 0.936000019311905     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -106.451999992132     
                   to: 109.536000013351     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.705168   2.233225   1.592764   0.221862
           0.087010   0.085918   0.076417   0.068339 [error]
 Peak      0.038893   0.044573   0.038093   0.007539
           0.006821   0.006761   0.006251   0.005242 [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 5.35e-07 9.26e-07 1.22e-06 3.29e-06 3.57e-06 5.98e-06   erg/cm2
              Error 4.42e-08 4.48e-08 7.70e-08 4.55e-07 1.82e-07 5.10e-07   erg/cm2
Peak flux Power-law 3.38e-01 3.36e-01 2.34e-01 2.59e-01 1.01e+00 1.17e+00   ph/cm2/s
              Error 8.90e-02 5.62e-02 4.94e-02 1.10e-01 1.63e-01 1.91e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.16e-07 9.43e-07 1.24e-06 2.41e-06 3.51e-06 5.09e-06   erg/cm2
              Error 4.03e-08 5.20e-08 8.11e-08 1.25e-06 2.05e-07 1.09e-06   erg/cm2
Peak flux Cutoff-PL 3.01e-01 3.60e-01 2.46e-01 1.20e-01 9.83e-01 1.03e+00   ph/cm2/s
              Error 1.05e-01 6.99e-02 5.61e-02 1.73e-01 1.69e-01 2.18e-01   ph/cm2/s
 
Fluence        Band 5.05e-07 9.49e-07 1.21e-06 3.00e-06 3.52e-06 5.66e-06   erg/cm2
              Error 7.39e-08 6.02e-08 9.09e-08 5.07e-07 2.07e-07 1.04e-06   erg/cm2
Peak flux      Band 3.01e-01 3.60e-01 2.46e-01 1.20e-01 9.83e-01 1.03e+00   ph/cm2/s
              Error 1.05e-01 6.99e-02 5.61e-02 1.73e-01 1.69e-01 2.40e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.599    0.086    -      -           1.77e-03 8.35e-05   51.659 57
CPL   1.329    0.313     124.8 4958.0      2.40e-03 0.00e+00   50.686 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.519    0.275    -      -           8.05e-03 1.35e-03   47.085 57
CPL   0.808    1.329      81.2 4975.0      1.88e-02 4.98e-02   45.877  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: 86.080000 sec.
T50 in the 50-300 keV band: 33.600000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  215.988 -106.452  109.536
T90   142.472  -69.808   72.664
T50    40.272    2.260   42.532
Peak    1.000   -0.064    0.936

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  228.0521 -80.5419 0.0114   26.3 -110.0       2.9430    16.9  TRIG_00323984       
------------------------------------------
 
Foreground time interval of the image:
-106.452  16.581 (delta_t = 123.033 [sec])
Background time interval of the image:
-239.424 -106.452 (delta_t = 132.972 [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 -106.452 sec. to  109.536 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59855     ( -8.609998E-02   8.664370E-02) )
Norm@50keV  : 1.768612E-03    ( -8.372474E-05   8.329109E-05) )
------------------------------------------------------------
 Chi-Squared =      51.65937     using    59 PHA bins.
 Reduced chi-squared =     0.9063047     for     57 degrees of freedom
 Null hypothesis probability = 0.675
 
Photon flux (15-150 keV)    in 216.0 sec: 0.227173 ( -0.010857  0.01088 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.57348e-06 ( -1.81699e-07  1.8239e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -106.452 sec. to  109.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32896     ( -0.287893   0.337499 )
Epeak [keV] : 124.838      ( -40.7793 9875.16 )
Norm@50keV  : 2.399390E-03    (     )
------------------------------------------------------------
 Chi-Squared =      50.68568     using    59 PHA bins.
 Reduced chi-squared =     0.9051014     for     56 degrees of freedom
 Null hypothesis probability = 0.676
 
Photon flux (15-150 keV)    in 216.0 sec: 0.224279 ( -0.011729  0.011373 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.51238e-06 ( -2.06993e-07  2.02068e-07 ) ergs/cm2
 
Band function
Time interval is from -106.452 sec. to  109.536 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.08432   ( -8.91568   3.90221 )
beta        : -1.67591    ( -8.32409   0.143567 )
Epeak [keV] : 66.0860      ( -65.9860 9933.91 )
Norm@50keV   : 3.581990E-03    ( -1.882134E-02   89.7970 )
------------------------------------------------------------
 Chi-Squared =      50.50230     using    59 PHA bins.
 Reduced chi-squared =     0.9182237     for     55 degrees of freedom
 Null hypothesis probability = 0.647
 
Photon flux (15-150 keV)    in 216.0 sec: 0.223771 ( -0.011866  0.012197 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.51981e-06 ( -2.0898e-07  2.06021e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.064 sec. to    0.936 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51912     ( -0.271756   0.278527 )
Norm@50keV  : 8.052405E-03    ( -1.356993E-03   1.338255E-03) )
------------------------------------------------------------
 Chi-Squared =      47.08509     using    59 PHA bins.
 Reduced chi-squared =     0.8260542     for     57 degrees of freedom
 Null hypothesis probability = 0.823
 
Photon flux (15-150 keV)    in 1.000 sec: 1.01052 ( -0.163055  0.16326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.61409e-08 ( -1.38582e-08  1.41513e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.064 sec. to    0.936 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.808485     ( -1.41585   1.24218 )
Epeak [keV] : 81.2494      ( -31.2457 9918.75 )
Norm@50keV  : 1.882520E-02    ( -1.882520E-02   8.075210E-02) )
------------------------------------------------------------
 Chi-Squared =      45.87685     using    59 PHA bins.
 but latest trial   19.9893     gives Chi-Squared =   2.81647
 Reduced chi-squared =     0.8192295     for     56 degrees of freedom
 Null hypothesis probability = 0.831
 
Photon flux (15-150 keV)    in 1.000 sec: 0.982705 ( -0.169354  0.168685 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.20785e-08 ( -1.51426e-08  1.55034e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.064 sec. to    0.936 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.811210   ( -9.18879   1.41477 )
beta        : -9.36431    ( -0.635694   19.3642 )
Epeak [keV] : 81.4246      ( -29.3792 9918.58 )
Norm@50keV   : 1.875530E-02    ( -1.875530E-02   8.116899E-02) )
------------------------------------------------------------
 Chi-Squared =      45.87688     using    59 PHA bins.
 Reduced chi-squared =     0.8341250     for     55 degrees of freedom
 Null hypothesis probability = 0.805
 
Photon flux (15-150 keV)    in 1.000 sec: 0.982686 ( -0.169341  0.168924 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.1976e-08 ( -1.50668e-08  1.55412e-08 ) ergs/cm2
 
Plot creation:
Sun Sep  7 13:59:54 EDT 2008