batgrbproduct Analysis for Trigger=232683

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 08:26:16 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger232683/GCN5_download_cron
======================================================================

  Trigger: 00232683      Segment: 000

  BAT Trigger Time: 181908490.304   [s; MET]
      Trigger Stop: 181908491.328   [s; MET]
               UTC: 2006-10-07T10:08:08.812840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 46.3175910410402   Dec: -50.4878550139145  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.62
     Image Trigger?:     NO
     Rate S/N Ratio:     73.1846978541279  [ if not an image trigger ]
     Image S/N Ratio:    15.62

  Flight Position:   [ source = BAT ]
    RA: 46.3175910410402   Dec: -50.4878550139145  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 46.3062555089715   Dec: -50.4938946833105  [deg; J2000]  
        { 03h 05m 13.5s , -50d 29' 38.0" }
         +/- 0.892051033792976 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.254688018085557 [arcmin] (formal 1-sigma fit error)
    SNR: 35.8088386233376
    RA  =   3h  5m 13.5s  (46.306256 deg.)
    Dec = -50d 29' 38" (-50.493895 deg.)
 
  Angular difference between Flight and Ground position is 0.564402 arcmin
 
  Partial Coding Fraction: 0.1953125    [ including projection effects ]

  Duration
     T90: 75.3120000064373 +/- 2.03568955863827
        Measured from: 3.61599999666214
                   to: 78.9280000030994     [s; relative to TRIGTIME]
     T50: 23.0080000162125 +/- 0.198715898747993
        Measured from: 31.4920000135899
                   to: 54.5000000298023     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 45.1440000236034     
                   to: 46.1440000236034     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.05599999427795     
                   to: 231.752000004053     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    12.450897  20.663214  21.486136   7.371777
           0.112773   0.127355   0.127869   0.105017 [error]
 Peak      0.303138   0.590656   0.773249   0.301606
           0.009659   0.012777   0.015129   0.012484 [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 3.91e-06 9.04e-06 1.66e-05 7.24e-05 4.50e-05 9.92e-05   erg/cm2
              Error 1.34e-07 1.81e-07 2.13e-07 2.38e-06 5.66e-07 0.00e+00   erg/cm2
Peak flux Power-law 2.91e+00 4.37e+00 4.90e+00 1.04e+01 1.53e+01 2.26e+01   ph/cm2/s
              Error 1.76e-01 1.57e-01 1.24e-01 6.18e-01 3.97e-01 6.36e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.77e-06 9.03e-06 1.68e-05 6.52e-05 4.49e-05 7.36e-05   erg/cm2
              Error 1.86e-07 1.83e-07 2.85e-07 7.33e-06 6.76e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 2.91e+00 4.37e+00 4.90e+00 1.03e+01 1.53e+01 2.25e+01   ph/cm2/s
              Error 1.76e-01 1.57e-01 1.24e-01 6.15e-01 3.97e-01 6.34e-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 2.78e+00 4.37e+00 4.98e+00 9.30e+00 1.52e+01 2.14e+01   ph/cm2/s
              Error 2.54e-01 1.59e-01 1.77e-01 1.48e+00 4.15e-01 1.55e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.127    0.026    -      -           1.84e-02 2.68e-04   28.932 57
CPL   1.021    0.112     617.8 4830.6      2.02e-02 1.85e-03   26.528  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.835    0.048    -      -           1.33e-01 3.51e-03   41.665 57
CPL   0.721    0.182     733.3 5000.0      1.48e-01 2.44e-02   40.373  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: 59.008000 sec.
T50 in the 50-300 keV band: 22.336000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  235.808   -4.056  231.752
T90    75.312    3.616   78.928
T50    23.008   31.492   54.500
Peak    1.000   45.144   46.144

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   46.3063 -50.4939 0.0053   36.1  109.8       8.0132    35.8  TRIG_00232683       
------------------------------------------
 
Foreground time interval of the image:
 -4.056  12.397 (delta_t =  16.453 [sec])
Background time interval of the image:
-35.603  -4.056 (delta_t =  31.547 [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   -4.056 sec. to  231.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12711     ( -2.642250E-02   2.629817E-02) )
Norm@50keV  : 1.841961E-02    ( -2.689846E-04   2.677198E-04) )
------------------------------------------------------------
 Chi-Squared =      28.93249     using    59 PHA bins.
 Reduced chi-squared =     0.5075876     for     57 degrees of freedom
 Null hypothesis probability = 0.999
 
Photon flux (15-150 keV)    in 235.8 sec: 2.14252 ( -0.03464  0.03477 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.50258e-05 ( -5.66392e-07  5.66156e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -4.056 sec. to  231.752 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02073     ( -0.111880   0.112666 )
Epeak [keV] : 617.794      ( -278.891 9382.21 )
Norm@50keV  : 2.015503E-02    ( -1.750834E-03   1.953231E-03) )
------------------------------------------------------------
 Chi-Squared =      26.52814     using    59 PHA bins.
 but latest trial  1.840368E-02 gives Chi-Squared =   2.85852
 Reduced chi-squared =     0.4737168     for     56 degrees of freedom
 Null hypothesis probability = 1.000
 
Photon flux (15-150 keV)    in 235.8 sec: 2.14107 ( -0.0346  0.03474 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.49053e-05 ( -5.71343e-07  7.79791e-07 ) ergs/cm2
 
Band function
Time interval is from   -4.056 sec. to  231.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.835291   ( -9.16471   2.93116 )
beta        : -1.12709    ( -2.631521E-02   2.640975E-02) )
Epeak [keV] : 60.7267      ( -965.946 9033.95 )
Norm@50keV   : 3.489946E-02    ( -3.168005E-04   21.9410 )
------------------------------------------------------------
 Chi-Squared =      28.93480     using    59 PHA bins.
 Reduced chi-squared =     0.5260872     for     55 degrees of freedom
 Null hypothesis probability = 0.999
 
Photon flux (15-150 keV)    in 235.8 sec: 2.12271 ( -0.04005  0.04043 ) 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   45.144 sec. to   46.144 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.834875     ( -4.809499E-02   4.778868E-02) )
Norm@50keV  : 0.133370    ( -3.514901E-03   3.501251E-03) )
------------------------------------------------------------
 Chi-Squared =      41.66533     using    59 PHA bins.
 Reduced chi-squared =     0.7309706     for     57 degrees of freedom
 Null hypothesis probability = 0.936
 
Photon flux (15-150 keV)    in 1.000 sec: 15.3137 ( -0.3971  0.3976 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53616e-06 ( -4.0107e-08  4.0167e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   45.144 sec. to   46.144 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.721244     ( -0.222232   0.142575 )
Epeak [keV] : 733.269      ( -733.259 9266.73 )
Norm@50keV  : 0.147654    ( -1.713441E-02   3.171600E-02) )
------------------------------------------------------------
 Chi-Squared =      40.37268     using    59 PHA bins.
 but latest trial  0.135224     gives Chi-Squared =   1.33121
 Reduced chi-squared =     0.7209408     for     56 degrees of freedom
 Null hypothesis probability = 0.943
 
Photon flux (15-150 keV)    in 1.000 sec: 15.3089 ( -0.3969  0.3975 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53413e-06 ( -4.0678e-08  4.0462e-08 ) ergs/cm2
 
Band function
Time interval is from   45.144 sec. to   46.144 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.823868   ( -9.17613   5.82387 )
beta        : -0.834875    ( -4.778540E-02   4.810065E-02) )
Epeak [keV] : 17.0484      ( -9999.88 2.050781E-02) )
Norm@50keV   : 0.187166    ( -3.824949E-03   3.517568E-03) )
------------------------------------------------------------
 Chi-Squared =      41.66534     using    59 PHA bins.
 Reduced chi-squared =     0.7575516     for     55 degrees of freedom
 Null hypothesis probability = 0.908
 
Photon flux (15-150 keV)    in 1.000 sec: 15.2269 ( -0.4142  0.4161 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53317e-06 ( -4.0684e-08  4.0602e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 08:45:51 EST 2008