batgrbproduct Analysis for Trigger=337115

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Fri Dec 12 01:25:26 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger337115/GCN5_download_cron
======================================================================

  Trigger: 00337115      Segment: 000

  BAT Trigger Time: 250688894.016   [s; MET]
      Trigger Stop: 250688896.064   [s; MET]
               UTC: 2008-12-11T11:48:10.690660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 328.087288181771   Dec: -33.8149123552862  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.53
     Image Trigger?:     NO
     Rate S/N Ratio:     7.41619848709566  [ if not an image trigger ]
     Image S/N Ratio:    6.53

  Flight Position:   [ source = BAT ]
    RA: 328.087288181771   Dec: -33.8149123552862  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 328.082267774135   Dec: -33.818316721673  [deg; J2000]  
        { 21h 52m 19.7s , -33d 49' 05.9" }
         +/- 2.31531476043163 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.23721480251507 [arcmin] (formal 1-sigma fit error)
    SNR: 9.16741503643154
 
  Angular difference between Flight and Ground position is 0.323040 arcmin
 
  Partial Coding Fraction: 0.4257812    [ including projection effects ]

  Duration
     T90: 3.47200000286102 +/- 0.875598073406745
        Measured from: -0.915999919176102
                   to: 2.55600008368492     [s; relative to TRIGTIME]
     T50: 1.55599999427795 +/- 0.905538519079527
        Measured from: 0.24000009894371
                   to: 1.79600009322166     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.19200000166893     
                   to: 1.19200000166893     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.08000001311302     
                   to: 2.74799999594688     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.099893   0.097254   0.041685   0.015732
           0.016573   0.016705   0.014522   0.013097 [error]
 Peak      0.023015   0.040970   0.027332  -0.000422
           0.008404   0.008715   0.007361   0.006749 [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 3.76e-08 4.17e-08 3.29e-08 4.31e-08 1.28e-07 1.55e-07   erg/cm2
              Error 9.20e-09 8.78e-09 1.33e-08 3.36e-08 3.10e-08 5.16e-08   erg/cm2
Peak flux Power-law 3.06e-01 2.74e-01 1.69e-01 1.59e-01 8.17e-01 9.08e-01   ph/cm2/s
              Error 1.26e-01 7.68e-02 5.88e-02 1.06e-01 2.26e-01 2.47e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.76e-08 4.33e-08 3.12e-08 2.06e-08 1.23e-07 1.28e-07   erg/cm2
              Error 9.50e-09 1.12e-08 1.85e-08 4.16e-08 4.38e-08 6.21e-08   erg/cm2
Peak flux Cutoff-PL 2.57e-01 3.23e-01 1.80e-01 3.96e-02 7.92e-01 7.99e-01   ph/cm2/s
              Error 1.38e-01 1.03e-01 7.84e-02 1.07e-01 2.26e-01 2.37e-01   ph/cm2/s
 
Fluence        Band 3.72e-08 4.48e-08 2.75e-08 2.54e-08 1.18e-07 1.38e-07   erg/cm2
              Error 1.01e-08 1.03e-08 2.11e-08 3.24e-08 4.87e-08 0.00e+00   erg/cm2
Peak flux      Band 2.57e-01 3.24e-01 1.79e-01 3.85e-02 7.91e-01 8.02e-01   ph/cm2/s
              Error 1.38e-01 1.03e-01 7.16e-02 1.25e-01 2.26e-01 2.45e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.338    0.407    -      -           3.48e-03 1.03e-03   52.372 57
CPL   1.968    1.278       3.1 4999.8      5.94e-03 2.30e-01   52.230  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.697    0.430    -      -           6.16e-03 1.76e-03   49.135 57
CPL   0.270    2.133      55.0 4981.9      3.72e-02 6.57e-01   47.060 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    3.828   -1.080    2.748
T90     3.472   -0.916    2.556
T50     1.556    0.240    1.796
Peak    1.000    0.192    1.192

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  328.0823 -33.8183 0.0209   42.7  -28.7       0.2797     9.2  TRIG_00337115       
------------------------------------------
 
Foreground time interval of the image:
 -1.080   2.748 (delta_t =   3.828 [sec])
Background time interval of the image:
-207.915  -1.080 (delta_t = 206.835 [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   -1.080 sec. to    2.748 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.33773     ( -0.376939   0.437270 )
Norm@50keV  : 3.479524E-03    ( -1.049509E-03   1.018254E-03) )
------------------------------------------------------------
 Chi-Squared =      52.37183     using    59 PHA bins.
 Reduced chi-squared =     0.9188041     for     57 degrees of freedom
 Null hypothesis probability = 0.649
 
Photon flux (15-150 keV)    in 3.828 sec: 0.621103 ( -0.11928  0.119282 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.28182e-07 ( -3.01933e-08  3.18287e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.080 sec. to    2.748 sec.
Photon index: 1.96819     ( -2.51641   3.948677E-02) )
Epeak [keV] : 3.14213      ( -2.75447 9996.86 )
Norm@50keV  : 5.943983E-03    ( -2.212972E-03   0.458465 )
------------------------------------------------------------
 Chi-Squared =      52.22980     using    59 PHA bins.
 but latest trial -0.548217     gives Chi-Squared =   64.9727
 but latest trial   2.00393     gives Chi-Squared =   2.24457
 but latest trial -0.755753     gives Chi-Squared =   8.28896
 Reduced chi-squared =     0.9326751     for     56 degrees of freedom
 Null hypothesis probability = 0.618
 
Photon flux (15-150 keV)    in 3.828 sec: 0.615063 ( -0.122181  0.120215 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23019e-07 ( -3.61015e-08  5.15704e-08 ) ergs/cm2
 
Band function
Time interval is from   -1.080 sec. to    2.748 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.45090   ( -8.54910   6.45090 )
beta        : -2.49210    ( -7.50790   0.481015 )
Epeak [keV] : 18.2446      ( -18.1446 240.124 )
Norm@50keV   : 1.437740E-02    ( -0.990194   763.434 )
------------------------------------------------------------
 Chi-Squared =      51.67296     using    59 PHA bins.
 Reduced chi-squared =     0.9395083     for     55 degrees of freedom
 Null hypothesis probability = 0.603
 
Photon flux (15-150 keV)    in 3.828 sec: 0.618185 ( -0.118099  0.121803 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.18368e-07 ( -2.97612e-08  3.51008e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.192 sec. to    1.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69704     ( -0.421153   0.438033 )
Norm@50keV  : 6.156294E-03    ( -1.769344E-03   1.742785E-03) )
------------------------------------------------------------
 Chi-Squared =      49.13470     using    59 PHA bins.
 Reduced chi-squared =     0.8620123     for     57 degrees of freedom
 Null hypothesis probability = 0.761
 
Photon flux (15-150 keV)    in 1.000 sec: 0.816812 ( -0.225772  0.226798 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.69809e-08 ( -1.66461e-08  1.71029e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.192 sec. to    1.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.270186     ( -2.63658   1.63012 )
Epeak [keV] : 55.0270      ( -18.8734 9944.97 )
Norm@50keV  : 3.716909E-02    ( -3.716909E-02   1.27672 )
------------------------------------------------------------
 Chi-Squared =      47.05991     using    59 PHA bins.
 Reduced chi-squared =     0.8403555     for     56 degrees of freedom
 Null hypothesis probability = 0.797
 
Photon flux (15-150 keV)    in 1.000 sec: 0.791530 ( -0.224328  0.22742 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.21065e-08 ( -1.68492e-08  1.80627e-08 ) ergs/cm2
 
Band function
Time interval is from    0.192 sec. to    1.192 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.282767   ( -9.71723   2.04430 )
beta        : -9.24265    ( -0.757351   19.2426 )
Epeak [keV] : 56.1103      ( -19.9946 9943.89 )
Norm@50keV   : 3.571320E-02    ( -134.263   37.2360 )
------------------------------------------------------------
 Chi-Squared =      47.06483     using    59 PHA bins.
 Reduced chi-squared =     0.8557242     for     55 degrees of freedom
 Null hypothesis probability = 0.768
 
Photon flux (15-150 keV)    in 1.000 sec: 0.790628 ( -0.223462  0.228312 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.19383e-08 ( -1.66378e-08  1.8182e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 12 01:56:45 EST 2008