batgrbproduct Analysis for Trigger=143840

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Jan  7 12:16:54 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger143840/GCN5_download_cron
======================================================================

  Trigger: 00143840      Segment: 000

  BAT Trigger Time: 141987676.416   [s; MET]
      Trigger Stop: 141987680.512   [s; MET]
               UTC: 2005-07-02T09:01:16.814740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 250.21560444593   Dec: -53.75562495367  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    33641
     Image Trigger?:     NO
     Rate S/N Ratio:     10.6301458127346  [ if not an image trigger ]
     Image S/N Ratio:    33641

  Flight Position:   [ source = BAT ]
    RA: 250.21560444593   Dec: -53.75562495367  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 250.190486776799   Dec: -53.7536730651425  [deg; J2000]  
        { 16h 40m 45.7s , -53d 45' 13.2" }
         +/- 3.15021450730915 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.17715014525762 [arcmin] (formal 1-sigma fit error)
    SNR: 5.90478260046
    RA  =  16h 40m 45.7s  (250.190487 deg.)
    Dec = -53d 45' 13" (-53.753673 deg.)
 
  Angular difference between Flight and Ground position is 0.898704 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 5 +/- 1.4142135623731
        Measured from: -0.416000008583069
                   to: 4.58399999141693     [s; relative to TRIGTIME]
     T50: 3 +/- 1
        Measured from: 0.583999991416931
                   to: 3.58399999141693     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.58399999141693     
                   to: 4.58399999141693     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.416000008583069     
                   to: 4.58399999141693     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.106071   0.024215  -0.002261   0.001412
           0.011839   0.011025   0.009870   0.008804 [error]
 Peak      0.017587   0.008410  -0.002560   0.006583
           0.005197   0.004933   0.004533   0.003917 [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 3.22e-08 1.09e-08 2.08e-09 4.64e-10 4.55e-08 4.57e-08   erg/cm2
              Error 6.39e-09 5.65e-09 2.48e-09 1.17e-09 1.19e-08 1.22e-08   erg/cm2
Peak flux Power-law 2.22e-01 3.96e-02 3.39e-03 3.13e-04 2.65e-01 2.65e-01   ph/cm2/s
              Error 8.21e-02 4.48e-02 1.02e-02 3.00e-03 1.17e-01 1.17e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.22e-08 1.09e-08 2.07e-09 4.61e-10 4.55e-08 4.56e-08   erg/cm2
              Error 6.40e-09 5.65e-09 2.48e-09 1.14e-09 1.19e-08 1.22e-08   erg/cm2
Peak flux Cutoff-PL 2.22e-01 3.96e-02 3.38e-03 3.11e-04 2.65e-01 2.65e-01   ph/cm2/s
              Error 8.21e-02 4.48e-02 1.02e-02 2.98e-03 1.17e-01 1.17e-01   ph/cm2/s
 
Fluence        Band 3.20e-08 1.12e-08 2.20e-09 5.11e-10 4.54e-08 8.70e-08   erg/cm2
              Error 6.29e-09 4.44e-09 4.05e-09 1.16e-09 9.90e-09 0.00e+00   erg/cm2
Peak flux      Band 2.29e-01 6.27e-02 5.09e-03 2.02e-02 1.71e+01 2.94e-01   ph/cm2/s
              Error 2.41e-02 2.00e+01 1.13e-01 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.392    0.927    -      -           3.06e-04 3.29e-04   44.482 57
CPL   1.777    0.000       1.9    0.0      3.82e-02 4.46e-02   45.044  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.407    2.317    -      -           3.04e-04 5.60e-04   43.568 57
CPL   1.808    2.466       1.6   23.6      4.19e-02 0.00e+00   43.973  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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    5.000   -0.416    4.584
T90     5.000   -0.416    4.584
T50     3.000    0.584    3.584
Peak    1.000    3.584    4.584

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  250.1905 -53.7537 0.0326   13.8   95.9       0.1485     5.9  TRIG_00143840       
------------------------------------------
 
Foreground time interval of the image:
 -0.416   4.584 (delta_t =   5.000 [sec])
Background time interval of the image:
-10.416  -0.416 (delta_t =  10.000 [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   -0.416 sec. to    4.584 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.39204     ( -0.807114   1.04611 )
Norm@50keV  : 3.062718E-04    ( -3.062718E-04   3.507593E-04) )
------------------------------------------------------------
 Chi-Squared =      44.48190     using    59 PHA bins.
 Reduced chi-squared =     0.7803842     for     57 degrees of freedom
 Null hypothesis probability = 0.886
 
Photon flux (15-150 keV)    in 5.000 sec: 0.267948 ( -0.055677  0.055986 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.54897e-08 ( -1.12859e-08  1.24758e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.416 sec. to    4.584 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77719     (     )
Epeak [keV] : 1.89573      (   )
Norm@50keV  : 3.817095E-02    ( -1.961516E-02   6.961837E-02) )
------------------------------------------------------------
 Chi-Squared =      45.04387     using    59 PHA bins.
 but latest trial  0.247883     gives Chi-Squared =   39.4384
 Reduced chi-squared =     0.8043548     for     56 degrees of freedom
 Null hypothesis probability = 0.853
 
Photon flux (15-150 keV)    in 5.000 sec: 0.267238 ( -0.055204  0.055852 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.54746e-08 ( -1.12831e-08  1.24814e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.416 sec. to    4.584 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.75226   ( -7.47228   0.387729 )
beta        : -8.76858    ( -1.04815   0.806883 )
Epeak [keV] : 6.43282      ( -6.33282 9993.57 )
Norm@50keV   : 6.409022E-03    ( -0.908897   28.7173 )
------------------------------------------------------------
 Chi-Squared =      56.49020     using    59 PHA bins.
 Reduced chi-squared =      1.027095     for     55 degrees of freedom
 Null hypothesis probability = 0.419
 
Photon flux (15-150 keV)    in 5.000 sec: 0.267882 ( -0.05426  0.054246 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.53794e-08 ( -1.06962e-08  9.10405e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    3.584 sec. to    4.584 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.40665     ( -1.38267   3.25054 )
Norm@50keV  : 3.042751E-04    ( -3.042751E-04   8.153241E-04) )
------------------------------------------------------------
 Chi-Squared =      43.56804     using    59 PHA bins.
 Reduced chi-squared =     0.7643515     for     57 degrees of freedom
 Null hypothesis probability = 0.905
 
Photon flux (15-150 keV)    in 1.000 sec: 0.265339 ( -0.118727  0.115451 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.85754e-09 ( -8.85754e-09  5.83206e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.584 sec. to    4.584 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.80752     ( -1.21935   3.71362 )
Epeak [keV] : 1.56077      ( -1.55077 45.6428 )
Norm@50keV  : 4.188344E-02    (     )
------------------------------------------------------------
 Chi-Squared =      43.97292     using    59 PHA bins.
 but latest trial  0.588171     gives Chi-Squared =  0.265903
 but latest trial   52.9694     gives Chi-Squared =   9.25598
 Reduced chi-squared =     0.7852307     for     56 degrees of freedom
 Null hypothesis probability = 0.878
 
Photon flux (15-150 keV)    in 1.000 sec: 0.265147 ( -0.118771  0.115426 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.8549e-09 ( -4.63779e-09  5.833e-09 ) ergs/cm2
 
Band function
Time interval is from    3.584 sec. to    4.584 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.76752   ( -2.12702   3.37055 )
beta        : -3.90071    ( -3.10344   1.51986 )
Epeak [keV] : 5.38488      ( -5.28488 9994.62 )
Norm@50keV   : 7.930389E-03    ( -3.576570E-02   0.116147 )
------------------------------------------------------------
 Chi-Squared =      46.74287     using    59 PHA bins.
 Reduced chi-squared =     0.8498703     for     55 degrees of freedom
 Null hypothesis probability = 0.778
 
Photon flux (15-150 keV)    in 1.000 sec: 17.1243 ( -17.1243  22.8194 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.8494e-09 ( -3.25412e-09  3.2181e-09 ) ergs/cm2
 
Plot creation:
Mon Jan  7 12:28:37 EST 2008