batgrbproduct Analysis for Trigger=152325

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jan  8 18:30:55 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger152325/GCN5_download_cron
======================================================================

  Trigger: 00152325      Segment: 000

  BAT Trigger Time: 146861834.816   [s; MET]
      Trigger Stop: 146861835.84   [s; MET]
               UTC: 2005-08-27T18:57:15.118740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 64.2790125123005   Dec: 18.2176224509772  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.71
     Image Trigger?:     NO
     Rate S/N Ratio:     24.8596057893121  [ if not an image trigger ]
     Image S/N Ratio:    8.71

  Flight Position:   [ source = BAT ]
    RA: 64.2790125123005   Dec: 18.2176224509772  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 64.2933170161854   Dec: 18.2167650859013  [deg; J2000]  
        { 04h 17m 10.4s , +18d 13' 00.4" }
         +/- 1.09066399331869 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.363383086184168 [arcmin] (formal 1-sigma fit error)
    SNR: 26.8703998376736
    RA  =   4h 17m 10.4s  (64.293317 deg.)
    Dec =  18d 13'  0" (18.216765 deg.)
 
  Angular difference between Flight and Ground position is 0.816874 arcmin
 
  Partial Coding Fraction: 0.53125    [ including projection effects ]

  Duration
     T90: 48.1000000238419 +/- 9.19313069704841
        Measured from: -22.7880000174046
                   to: 25.3120000064373     [s; relative to TRIGTIME]
     T50: 10.6960000097752 +/- 1.71170559281001
        Measured from: -6.81600001454353
                   to: 3.87999999523163     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.303999990224838     
                   to: 1.30399999022484     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -31.1840000152588     
                   to: 36.1239999830723     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.772806   1.143140   0.922935   0.283081
           0.055809   0.057130   0.048501   0.038954 [error]
 Peak      0.040086   0.088001   0.078220   0.027575
           0.007311   0.008170   0.007502   0.005713 [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 2.46e-07 4.89e-07 7.52e-07 2.53e-06 2.10e-06 4.03e-06   erg/cm2
              Error 2.72e-08 3.13e-08 4.86e-08 3.77e-07 1.21e-07 4.01e-07   erg/cm2
Peak flux Power-law 4.51e-01 5.72e-01 5.30e-01 8.59e-01 1.84e+00 2.41e+00   ph/cm2/s
              Error 9.43e-02 7.36e-02 5.87e-02 2.03e-01 1.99e-01 2.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.44e-07 4.91e-07 7.56e-07 2.34e-06 2.10e-06 3.71e-06   erg/cm2
              Error 2.86e-08 3.33e-08 4.78e-08 7.08e-07 1.21e-07 7.28e-07   erg/cm2
Peak flux Cutoff-PL 4.09e-01 5.89e-01 5.58e-01 5.85e-01 1.82e+00 2.14e+00   ph/cm2/s
              Error 1.15e-01 8.16e-02 7.60e-02 4.08e-01 2.01e-01 3.89e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 4.06e-01 5.93e-01 5.55e-01 7.90e-01 1.82e+00 2.24e+00   ph/cm2/s
              Error 1.18e-01 9.96e-02 8.38e-02 1.75e-01 2.08e-01 3.68e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.379    0.101    -      -           3.22e-03 1.74e-04   40.191 57
CPL   1.303    0.254     503.4    0.0      3.49e-03 1.75e-04   40.278 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.112    0.176    -      -           1.59e-02 1.64e-03   52.609 57
CPL   0.711    0.658     182.9 5000.0      2.42e-02 1.92e-02   51.563  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: 15.040000 sec.
T50 in the 50-300 keV band: 6.400000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   67.308  -31.184   36.124
T90    48.100  -22.788   25.312
T50    10.696   -6.816    3.880
Peak    1.000    0.304    1.304

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   64.2933 +18.2168 0.0073   31.1  145.4       3.1583    26.9  TRIG_00152325       
------------------------------------------
 
Foreground time interval of the image:
-31.184  36.124 (delta_t =  67.308 [sec])
Background time interval of the image:
-299.816 -31.184 (delta_t = 268.632 [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  -31.184 sec. to   36.124 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37918     ( -0.101084   0.100406 )
Norm@50keV  : 3.218868E-03    ( -1.742174E-04   1.741960E-04) )
------------------------------------------------------------
 Chi-Squared =      40.19055     using    59 PHA bins.
 Reduced chi-squared =     0.7050974     for     57 degrees of freedom
 Null hypothesis probability = 0.955
 
Photon flux (15-150 keV)    in 67.31 sec: 0.390186 ( -0.023031  0.023148 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10272e-06 ( -1.20586e-07  1.21037e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -31.184 sec. to   36.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30302     ( -0.332477   0.175360 )
Epeak [keV] : 503.401      (   )
Norm@50keV  : 3.492365E-03    ( -1.698066E-04   1.799420E-04) )
------------------------------------------------------------
 Chi-Squared =      40.27822     using    59 PHA bins.
 Reduced chi-squared =     0.7192540     for     56 degrees of freedom
 Null hypothesis probability = 0.944
 
Photon flux (15-150 keV)    in 67.31 sec: 0.390034 ( -0.023022  0.023138 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10252e-06 ( -1.2027e-07  1.21468e-07 ) ergs/cm2
 
Band function
Time interval is from  -31.184 sec. to   36.124 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.926841   ( -9.07316   3.13285 )
beta        : -1.41224    ( -8.58776   0.130944 )
Epeak [keV] : 81.2223      ( -81.1223 9918.78 )
Norm@50keV   : 6.147079E-03    ( -6.147079E-03   255.252 )
------------------------------------------------------------
 Chi-Squared =      40.02275     using    59 PHA bins.
 Reduced chi-squared =     0.7276865     for     55 degrees of freedom
 Null hypothesis probability = 0.935
 
Photon flux (15-150 keV)    in 67.31 sec: 0.387558 ( -0.02502  0.024434 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.304 sec. to    1.304 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11168     ( -0.178617   0.173455 )
Norm@50keV  : 1.588032E-02    ( -1.644689E-03   1.640012E-03) )
------------------------------------------------------------
 Chi-Squared =      52.60935     using    59 PHA bins.
 Reduced chi-squared =     0.9229710     for     57 degrees of freedom
 Null hypothesis probability = 0.640
 
Photon flux (15-150 keV)    in 1.000 sec: 1.84413 ( -0.19831  0.19889 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6538e-07 ( -1.796e-08  1.8112e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.304 sec. to    1.304 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.710789     ( -0.780359   0.536234 )
Epeak [keV] : 182.858      ( -182.848 9817.14 )
Norm@50keV  : 2.421621E-02    ( -9.548236E-03   2.879240E-02) )
------------------------------------------------------------
 Chi-Squared =      51.56345     using    59 PHA bins.
 but latest trial   1.24224     gives Chi-Squared =   6.51846
 Reduced chi-squared =     0.9207759     for     56 degrees of freedom
 Null hypothesis probability = 0.643
 
Photon flux (15-150 keV)    in 1.000 sec: 1.82391 ( -0.20147  0.20135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.63398e-07 ( -1.891e-08  1.8635e-08 ) ergs/cm2
 
Band function
Time interval is from    0.304 sec. to    1.304 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.125819   ( -10.1258   4.86474 )
beta        : -1.23703    ( -8.76297   0.246447 )
Epeak [keV] : 62.4079      ( -62.3079 1120.82 )
Norm@50keV   : 8.941689E-02    ( -129.903   21.3068 )
------------------------------------------------------------
 Chi-Squared =      50.96119     using    59 PHA bins.
 Reduced chi-squared =     0.9265671     for     55 degrees of freedom
 Null hypothesis probability = 0.630
 
Photon flux (15-150 keV)    in 1.000 sec: 1.82069 ( -0.21076  0.20552 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.63291e-07 ( -1.8895e-08  1.8628e-08 ) ergs/cm2
 
Plot creation:
Tue Jan  8 18:41:53 EST 2008