batgrbproduct Analysis for Trigger=324561

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sat Sep 13 11:43:41 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger324561/GCN5_download_cron
======================================================================

  Trigger: 00324561      Segment: 000

  BAT Trigger Time: 242981217.216   [s; MET]
      Trigger Stop: 242981218.24   [s; MET]
               UTC: 2008-09-13T06:46:54.122140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 65.7245690715967   Dec: -25.1102227127259  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.39
     Image Trigger?:     NO
     Rate S/N Ratio:     13.9283882771841  [ if not an image trigger ]
     Image S/N Ratio:    9.39

  Flight Position:   [ source = BAT ]
    RA: 65.7245690715967   Dec: -25.1102227127259  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 65.7415501163352   Dec: -25.1274515691901  [deg; J2000]  
        { 04h 22m 58.0s , -25d 07' 38.8" }
         +/- 1.45970225730563 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.555924828439149 [arcmin] (formal 1-sigma fit error)
    SNR: 17.7196493458669
 
  Angular difference between Flight and Ground position is 1.385504 arcmin
 
  Partial Coding Fraction: 0.390625    [ including projection effects ]

  Duration
     T90: 7.89200001955032 +/- 0.886530314915268
        Measured from: -3.27599990367889
                   to: 4.61600011587143     [s; relative to TRIGTIME]
     T50: 3.3120000064373 +/- 1.22353258263039
        Measured from: -1.5919998884201
                   to: 1.7200001180172     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.108000010251999     
                   to: 1.108000010252     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.77599999308586     
                   to: 5.15600001811981     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.173958   0.292594   0.279204   0.068624
           0.025132   0.026336   0.024367   0.020274 [error]
 Peak      0.033545   0.059513   0.049924   0.017187
           0.008673   0.009114   0.008853   0.006964 [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 6.69e-08 1.34e-07 2.09e-07 7.17e-07 5.82e-07 1.13e-06   erg/cm2
              Error 1.13e-08 1.40e-08 2.27e-08 1.67e-07 5.75e-08 1.82e-07   erg/cm2
Peak flux Power-law 4.52e-01 4.57e-01 3.26e-01 3.69e-01 1.38e+00 1.60e+00   ph/cm2/s
              Error 1.30e-01 8.48e-02 6.83e-02 1.54e-01 2.43e-01 2.78e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.51e-08 1.44e-07 2.28e-07 2.67e-07 5.61e-07 6.89e-07   erg/cm2
              Error 1.37e-08 1.66e-08 2.76e-08 1.92e-07 6.05e-08 1.96e-07   erg/cm2
Peak flux Cutoff-PL 3.85e-01 5.00e-01 3.53e-01 1.56e-01 1.34e+00 1.39e+00   ph/cm2/s
              Error 1.54e-01 1.05e-01 8.23e-02 2.33e-01 2.49e-01 3.25e-01   ph/cm2/s
 
Fluence        Band 5.45e-08 1.44e-07 2.28e-07 2.66e-07 5.60e-07 7.22e-07   erg/cm2
              Error 1.35e-08 1.66e-08 2.76e-08 1.92e-07 6.04e-08 2.77e-07   erg/cm2
Peak flux      Band 3.73e-01 5.25e-01 3.24e-01 2.87e-01 1.35e+00 1.48e+00   ph/cm2/s
              Error 1.61e-01 1.11e-01 7.45e-02 2.39e-01 2.49e-01 3.20e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.360    0.152    -      -           6.69e-03 6.19e-04   44.600 57
CPL   0.461    0.704      93.6   58.1      1.76e-02 1.48e-02   38.682 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.490    0.280    -      -           1.11e-02 1.93e-03   54.639 57
CPL   0.579    1.335      78.4 4972.1      3.20e-02 1.00e-01   52.892  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: 7.296000 sec.
T50 in the 50-300 keV band: 3.840000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    8.932   -3.776    5.156
T90     7.892   -3.276    4.616
T50     3.312   -1.592    1.720
Peak    1.000    0.108    1.108

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   65.7416 -25.1275 0.0108   46.3 -168.2       0.8825    17.7  TRIG_00324561       
------------------------------------------
 
Foreground time interval of the image:
 -3.776   5.156 (delta_t =   8.932 [sec])
Background time interval of the image:
-239.216  -3.776 (delta_t = 235.440 [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   -3.776 sec. to    5.156 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35968     ( -0.152485   0.151669 )
Norm@50keV  : 6.689748E-03    ( -6.193682E-04   6.193956E-04) )
------------------------------------------------------------
 Chi-Squared =      44.60033     using    59 PHA bins.
 Reduced chi-squared =     0.7824619     for     57 degrees of freedom
 Null hypothesis probability = 0.884
 
Photon flux (15-150 keV)    in 8.932 sec: 0.807546 ( -0.078753  0.079026 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.82386e-07 ( -5.73515e-08  5.75766e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -3.776 sec. to    5.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.461090     ( -0.760201   0.647864 )
Epeak [keV] : 93.6306      ( -21.2104 94.9420 )
Norm@50keV  : 1.759352E-02    ( -8.669028E-03   2.095215E-02) )
------------------------------------------------------------
 Chi-Squared =      38.68186     using    59 PHA bins.
 Reduced chi-squared =     0.6907476     for     56 degrees of freedom
 Null hypothesis probability = 0.962
 
Photon flux (15-150 keV)    in 8.932 sec: 0.778749 ( -0.081261  0.081593 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.60899e-07 ( -6.05599e-08  6.04143e-08 ) ergs/cm2
 
Band function
Time interval is from   -3.776 sec. to    5.156 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.461919   ( -0.647020   0.736209 )
beta        : -8.45806    ( -1.54194   7.01074 )
Epeak [keV] : 93.6592      ( -21.2578 95.0126 )
Norm@50keV   : 1.757727E-02    ( -8.653752E-03   2.098170E-02) )
------------------------------------------------------------
 Chi-Squared =      38.68191     using    59 PHA bins.
 Reduced chi-squared =     0.7033074     for     55 degrees of freedom
 Null hypothesis probability = 0.953
 
Photon flux (15-150 keV)    in 8.932 sec: 0.778791 ( -0.081306  0.081551 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.60489e-07 ( -6.04294e-08  6.04294e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.108 sec. to    1.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49040     ( -0.277392   0.282385 )
Norm@50keV  : 1.107965E-02    ( -1.936415E-03   1.927053E-03) )
------------------------------------------------------------
 Chi-Squared =      54.63896     using    59 PHA bins.
 Reduced chi-squared =     0.9585782     for     57 degrees of freedom
 Null hypothesis probability = 0.564
 
Photon flux (15-150 keV)    in 1.000 sec: 1.37965 ( -0.2431  0.24385 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05285e-07 ( -1.9687e-08  1.9869e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.108 sec. to    1.108 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.579390     ( -1.59400   1.07567 )
Epeak [keV] : 78.3978      ( -22.4944 9921.60 )
Norm@50keV  : 3.202438E-02    ( -3.202438E-02   0.168961 )
------------------------------------------------------------
 Chi-Squared =      52.89182     using    59 PHA bins.
 but latest trial   39.4067     gives Chi-Squared =   9.94138
 Reduced chi-squared =     0.9444968     for     56 degrees of freedom
 Null hypothesis probability = 0.593
 
Photon flux (15-150 keV)    in 1.000 sec: 1.34075 ( -0.24897  0.24915 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.99951e-08 ( -2.137e-08  2.14459e-08 ) ergs/cm2
 
Band function
Time interval is from    0.108 sec. to    1.108 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.208721E-02   ( -14.1070   0.893000 )
beta        : -2.02350    ( -0.493265   0.422645 )
Epeak [keV] : 59.1111      ( -35.5186 420.747 )
Norm@50keV   : 7.255076E-02    ( -136.862   34.8276 )
------------------------------------------------------------
 Chi-Squared =      52.45507     using    59 PHA bins.
 Reduced chi-squared =     0.9537286     for     55 degrees of freedom
 Null hypothesis probability = 0.572
 
Photon flux (15-150 keV)    in 1.000 sec: 1.34602 ( -0.25488  0.24325 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0243e-07 ( -1.99399e-08  1.93e-08 ) ergs/cm2
 
Plot creation:
Sat Sep 13 12:00:43 EDT 2008