batgrbproduct Analysis for Trigger=235715

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 09:41:16 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger235715/GCN5_download_cron
======================================================================

  Trigger: 00235715      Segment: 000

  BAT Trigger Time: 183691584   [s; MET]
      Trigger Stop: 183691712   [s; MET]
               UTC: 2006-10-28T01:26:22.466000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 97.2117735881431   Dec: 46.2699444035206  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.1
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.1

  Flight Position:   [ source = BAT ]
    RA: 97.2117735881431   Dec: 46.2699444035206  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 97.1880442907154   Dec: 46.2896636241047  [deg; J2000]  
        { 06h 28m 45.1s , +46d 17' 22.8" }
         +/- 2.54696711091804 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.49070710531789 [arcmin] (formal 1-sigma fit error)
    SNR: 7.99990890123765
    RA  =   6h 28m 45.1s  (97.188044 deg.)
    Dec =  46d 17' 23" (46.289664 deg.)
 
  Angular difference between Flight and Ground position is 1.538873 arcmin
 
  Partial Coding Fraction: 0.3554688    [ including projection effects ]

  Duration
     T90: 106.175999999046 +/- 36.4760686500928
        Measured from: 56.3959999978542
                   to: 162.571999996901     [s; relative to TRIGTIME]
     T50: 41.4600000083447 +/- 17.465467630175
        Measured from: 80.0439999997616
                   to: 121.504000008106     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 79.9359999895096     
                   to: 80.9359999895096     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 46.9399999976158     
                   to: 166.143999993801     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.531851   0.570851   0.420578   0.166012
           0.082542   0.083518   0.073299   0.064751 [error]
 Peak      0.016883   0.033815   0.019257   0.018207
           0.008014   0.008195   0.007031   0.006154 [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 1.66e-07 2.65e-07 3.20e-07 7.52e-07 9.68e-07 1.48e-06   erg/cm2
              Error 4.14e-08 3.96e-08 7.59e-08 3.87e-07 1.72e-07 4.50e-07   erg/cm2
Peak flux Power-law 1.63e-01 2.04e-01 1.85e-01 2.91e-01 6.51e-01 8.43e-01   ph/cm2/s
              Error 9.84e-02 7.47e-02 5.44e-02 2.01e-01 1.94e-01 2.37e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.66e-07 2.66e-07 3.20e-07 7.46e-07 9.68e-07 1.49e-06   erg/cm2
              Error 4.14e-08 3.96e-08 7.61e-08 3.84e-07 1.72e-07 4.47e-07   erg/cm2
Peak flux Cutoff-PL 1.63e-01 2.04e-01 1.85e-01 2.89e-01 6.51e-01 8.41e-01   ph/cm2/s
              Error 9.83e-02 7.48e-02 5.45e-02 2.00e-01 1.94e-01 2.36e-01   ph/cm2/s
 
Fluence        Band 1.60e-07 3.17e-05 3.79e-05 8.17e-05 1.05e-04 1.56e-06   erg/cm2
              Error 2.06e-05 2.22e-05 5.39e-05 6.80e-05 2.42e-07 0.00e+00   erg/cm2
Peak flux      Band 1.71e-01 1.99e-01 1.86e-01 3.00e-01 6.46e-01 8.71e-01   ph/cm2/s
              Error 6.92e-02 5.44e-02 5.20e-02 2.39e-01 1.86e-01 2.39e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.732    0.303    -      -           8.79e-04 1.49e-04   46.683 57
CPL   1.730    0.000    9923.1    0.0      8.83e-04 4.38e-04   46.690  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.141    0.535    -      -           5.59e-03 1.58e-03   60.886 57
CPL   1.137    0.539    9997.4 5000.0      5.62e-03 1.58e-03   60.891 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  119.204   46.940  166.144
T90   106.176   56.396  162.572
T50    41.460   80.044  121.504
Peak    1.000   79.936   80.936

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   97.1880 +46.2897 0.0241   30.2  101.2       1.2682     8.0  TRIG_00235715       
------------------------------------------
 
Foreground time interval of the image:
 46.940 135.601 (delta_t =  88.661 [sec])
Background time interval of the image:
-239.000  46.940 (delta_t = 285.940 [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   46.940 sec. to  166.144 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73199     ( -0.295086   0.310932 )
Norm@50keV  : 8.787326E-04    ( -1.516968E-04   1.453243E-04) )
------------------------------------------------------------
 Chi-Squared =      46.68259     using    59 PHA bins.
 Reduced chi-squared =     0.8189928     for     57 degrees of freedom
 Null hypothesis probability = 0.834
 
Photon flux (15-150 keV)    in 119.2 sec: 0.118042 ( -0.017737  0.017765 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.67663e-07 ( -1.7081e-07  1.73773e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   46.940 sec. to  166.144 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73002     (     )
Epeak [keV] : 9923.11      (   )
Norm@50keV  : 8.828973E-04    ( -1.770512E-04   6.989380E-04) )
------------------------------------------------------------
 Chi-Squared =      46.68997     using    59 PHA bins.
 but latest trial   1.21372     gives Chi-Squared =   8.08574
 Reduced chi-squared =     0.8337495     for     56 degrees of freedom
 Null hypothesis probability = 0.808
 
Photon flux (15-150 keV)    in 119.2 sec: 0.117995 ( -0.017732  0.017758 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.67548e-07 ( -1.70787e-07  1.73914e-07 ) ergs/cm2
 
Band function
Time interval is from   46.940 sec. to  166.144 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.41198   ( -4.625320E-04   14.9995 )
beta        : -1.68725    ( -0.311053   0.294964 )
Epeak [keV] : 7.90464      ( -7.80464 9992.10 )
Norm@50keV   : 2.396049E-03    ( -2.061414E-02   1.974684E-02) )
------------------------------------------------------------
 Chi-Squared =      46.74369     using    59 PHA bins.
 Reduced chi-squared =     0.8498853     for     55 degrees of freedom
 Null hypothesis probability = 0.778
 
Photon flux (15-150 keV)    in 119.2 sec: 0.117810 ( -0.017534  0.017414 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0.000105058 ( -0.000105058  3.08646e-05 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   79.936 sec. to   80.936 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14148     ( -0.574478   0.496096 )
Norm@50keV  : 5.591876E-03    ( -1.598137E-03   1.552517E-03) )
------------------------------------------------------------
 Chi-Squared =      60.88631     using    59 PHA bins.
 Reduced chi-squared =      1.068181     for     57 degrees of freedom
 Null hypothesis probability = 0.338
 
Photon flux (15-150 keV)    in 1.000 sec: 0.651481 ( -0.193272  0.194949 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.77203e-08 ( -1.64975e-08  1.66268e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   79.936 sec. to   80.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13716     ( -0.578742   0.499028 )
Epeak [keV] : 9997.44      ( -9997.43 2.55664 )
Norm@50keV  : 5.621167E-03    ( -1.600054E-03   1.557746E-03) )
------------------------------------------------------------
 Chi-Squared =      60.89141     using    59 PHA bins.
 Reduced chi-squared =      1.087347     for     56 degrees of freedom
 Null hypothesis probability = 0.304
 
Photon flux (15-150 keV)    in 1.000 sec: 0.651314 ( -0.193206  0.194898 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.77358e-08 ( -1.65123e-08  1.66336e-08 ) ergs/cm2
 
Band function
Time interval is from   79.936 sec. to   80.936 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.627203   ( -9.37280   5.62720 )
beta        : -1.16561    ( -8.83439   0.589792 )
Epeak [keV] : 81.8749      ( -81.7749 9918.12 )
Norm@50keV   : 1.227608E-02    ( -32.8478   51.6958 )
------------------------------------------------------------
 Chi-Squared =      60.81752     using    59 PHA bins.
 Reduced chi-squared =      1.105773     for     55 degrees of freedom
 Null hypothesis probability = 0.274
 
Photon flux (15-150 keV)    in 1.000 sec: 0.646455 ( -0.186071  0.185787 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.70015e-08 ( -1.71592e-08  1.66905e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 09:57:34 EST 2008