batgrbproduct Analysis for Trigger=324895

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Sep 16 17:38:36 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger324895/GCN5_download_cron
======================================================================

  Trigger: 00324895      Segment: 000

  BAT Trigger Time: 243251123.712   [s; MET]
      Trigger Stop: 243251124.736   [s; MET]
               UTC: 2008-09-16T09:45:20.610200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 336.30162356459   Dec: -57.0218867906394  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    20.32
     Image Trigger?:     NO
     Rate S/N Ratio:     59.9249530663145  [ if not an image trigger ]
     Image S/N Ratio:    20.32

  Flight Position:   [ source = BAT ]
    RA: 336.30162356459   Dec: -57.0218867906394  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 336.288496834868   Dec: -57.0260707726282  [deg; J2000]  
        { 22h 25m 09.2s , -57d 01' 33.9" }
         +/- 0.633030615891159 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.231555480282118 [arcmin] (formal 1-sigma fit error)
    SNR: 58.4517285724283
 
  Angular difference between Flight and Ground position is 0.496780 arcmin
 
  Partial Coding Fraction: 0.828125    [ including projection effects ]

  Duration
     T90: 60.3519999980927 +/- 6.3258975691903
        Measured from: -0.595999926328659
                   to: 59.756000071764     [s; relative to TRIGTIME]
     T50: 23.1439999938011 +/- 0.998599005303173
        Measured from: 3.82400009036064
                   to: 26.9680000841618     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.25199997425079     
                   to: 2.25199997425079     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.40000000596046     
                   to: 88.6399999856949     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.972324   2.725954   1.873410   0.325882
           0.049116   0.049498   0.043007   0.034753 [error]
 Peak      0.053113   0.132913   0.125535   0.034538
           0.006179   0.006975   0.006655   0.004726 [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 6.49e-07 1.10e-06 1.42e-06 3.70e-06 4.19e-06 6.88e-06   erg/cm2
              Error 3.13e-08 3.06e-08 4.53e-08 2.67e-07 1.09e-07 2.93e-07   erg/cm2
Peak flux Power-law 6.15e-01 8.14e-01 7.92e-01 1.38e+00 2.67e+00 3.60e+00   ph/cm2/s
              Error 7.00e-02 5.78e-02 5.15e-02 1.86e-01 1.61e-01 1.75e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.84e-07 1.13e-06 1.46e-06 2.03e-06 4.04e-06 5.22e-06   erg/cm2
              Error 4.02e-08 3.42e-08 5.01e-08 4.93e-07 1.26e-07 5.07e-07   erg/cm2
Peak flux Cutoff-PL 4.81e-01 8.67e-01 8.84e-01 5.80e-01 2.58e+00 2.81e+00   ph/cm2/s
              Error 8.53e-02 6.74e-02 6.59e-02 2.02e-01 1.66e-01 2.56e-01   ph/cm2/s
 
Fluence        Band 5.77e-07 1.13e-06 1.46e-06 2.54e-06 4.03e-06 5.92e-06   erg/cm2
              Error 4.67e-08 4.16e-08 6.42e-08 7.48e-07 1.28e-07 0.00e+00   erg/cm2
Peak flux      Band 4.81e-01 8.67e-01 8.84e-01 5.79e-01 2.58e+00 2.81e+00   ph/cm2/s
              Error 8.53e-02 6.74e-02 6.59e-02 2.02e-01 1.66e-01 4.12e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.631    0.047    -      -           4.93e-03 1.23e-04   64.645 57
CPL   1.167    0.206      94.7   23.2      8.16e-03 1.80e-03   48.227 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.040    0.097    -      -           2.32e-02 1.37e-03   72.612 57
CPL   0.031    0.468     108.7   30.3      6.71e-02 3.40e-02   55.435 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: 43.584000 sec.
T50 in the 50-300 keV band: 18.880000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   91.040   -2.400   88.640
T90    60.352   -0.596   59.756
T50    23.144    3.824   26.968
Peak    1.000    1.252    2.252

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  336.2885 -57.0261 0.0033   18.0  129.1       3.0898    58.5  TRIG_00324895       
------------------------------------------
 
Foreground time interval of the image:
 -2.400  13.089 (delta_t =  15.489 [sec])
Background time interval of the image:
-239.712  -2.400 (delta_t = 237.312 [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   -2.400 sec. to   88.640 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63089     ( -4.727578E-02   4.737890E-02) )
Norm@50keV  : 4.933494E-03    ( -1.230240E-04   1.229667E-04) )
------------------------------------------------------------
 Chi-Squared =      64.64508     using    59 PHA bins.
 Reduced chi-squared =      1.134124     for     57 degrees of freedom
 Null hypothesis probability = 0.227
 
Photon flux (15-150 keV)    in 91.04 sec: 0.640193 ( -0.017632  0.01769 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.18555e-06 ( -1.08966e-07  1.09175e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -2.400 sec. to   88.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16711     ( -0.210855   0.200278 )
Epeak [keV] : 94.7177      ( -14.3747 31.9755 )
Norm@50keV  : 8.164383E-03    ( -1.559872E-03   2.046005E-03) )
------------------------------------------------------------
 Chi-Squared =      48.22692     using    59 PHA bins.
 Reduced chi-squared =     0.8611950     for     56 degrees of freedom
 Null hypothesis probability = 0.760
 
Photon flux (15-150 keV)    in 91.04 sec: 0.617285 ( -0.019793  0.019926 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.03991e-06 ( -1.25808e-07  1.25453e-07 ) ergs/cm2
 
Band function
Time interval is from   -2.400 sec. to   88.640 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.02447   ( -0.342159   0.684203 )
beta        : -1.92776    ( -7.78422   0.479717 )
Epeak [keV] : 78.8084      ( -43.2212 33.5723 )
Norm@50keV   : 9.836864E-03    ( -1.740298E-03   1.835228E-02) )
------------------------------------------------------------
 Chi-Squared =      48.19916     using    59 PHA bins.
 Reduced chi-squared =     0.8763483     for     55 degrees of freedom
 Null hypothesis probability = 0.730
 
Photon flux (15-150 keV)    in 91.04 sec: 0.616259 ( -0.021362  0.020252 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.0325e-06 ( -1.25207e-07  1.30296e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.252 sec. to    2.252 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04025     ( -9.748286E-02   9.639823E-02) )
Norm@50keV  : 2.316778E-02    ( -1.372371E-03   1.371792E-03) )
------------------------------------------------------------
 Chi-Squared =      72.61223     using    59 PHA bins.
 Reduced chi-squared =      1.273899     for     57 degrees of freedom
 Null hypothesis probability = 7.959E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 2.67389 ( -0.16098  0.16119 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.47144e-07 ( -1.6101e-08  1.6037e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.252 sec. to    2.252 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.054360E-02     ( -0.494036   0.442652 )
Epeak [keV] : 108.742      ( -19.0415 41.4900 )
Norm@50keV  : 6.713183E-02    ( -2.443584E-02   4.348190E-02) )
------------------------------------------------------------
 Chi-Squared =      55.43490     using    59 PHA bins.
 Reduced chi-squared =     0.9899090     for     56 degrees of freedom
 Null hypothesis probability = 0.496
 
Photon flux (15-150 keV)    in 1.000 sec: 2.58330 ( -0.1658  0.16589 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.35183e-07 ( -1.7316e-08  1.7221e-08 ) ergs/cm2
 
Band function
Time interval is from    1.252 sec. to    2.252 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.986831E-02   ( -0.443287   0.493589 )
beta        : -9.33378    ( -0.666221   11.0178 )
Epeak [keV] : 108.684      ( -18.9848 41.5102 )
Norm@50keV   : 6.718880E-02    ( -2.449555E-02   4.346592E-02) )
------------------------------------------------------------
 Chi-Squared =      55.43483     using    59 PHA bins.
 Reduced chi-squared =      1.007906     for     55 degrees of freedom
 Null hypothesis probability = 0.458
 
Photon flux (15-150 keV)    in 1.000 sec: 2.58309 ( -0.16561  0.16613 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.35036e-07 ( -1.728e-08  1.7226e-08 ) ergs/cm2
 
Plot creation:
Tue Sep 16 17:57:12 EDT 2008