batgrbproduct Analysis for Trigger=208169

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 21:20:33 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger208169/SDC
======================================================================

  Trigger: 00208169      Segment: 000

  BAT Trigger Time: 168231813.312   [s; MET]
      Trigger Stop: 168231814.336   [s; MET]
               UTC: 2006-05-02T03:03:32.144320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 240.857822844256   Dec: 66.5949806915925  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.69
     Image Trigger?:     NO
     Rate S/N Ratio:     24.5560583156173  [ if not an image trigger ]
     Image S/N Ratio:    12.69

  Flight Position:   [ source = BAT ]
    RA: 240.857822844256   Dec: 66.5949806915925  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 240.922856932829   Dec: 66.6003561820521  [deg; J2000]  
        { 16h 03m 41.5s , +66d 36' 01.3" }
         +/- 0.805300174374127 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.286970876133445 [arcmin] (formal 1-sigma fit error)
    SNR: 41.4442600208749
    RA  =  16h  3m 41.5s  (240.922857 deg.)
    Dec =  66d 36'  1" (66.600356 deg.)
 
  Angular difference between Flight and Ground position is 1.583039 arcmin
 
  Partial Coding Fraction: 0.4921875    [ including projection effects ]

  Duration
     T90: 28.4360000193119 +/- 9.82783800045578
        Measured from: -3.71200001239777
                   to: 24.7240000069141     [s; relative to TRIGTIME]
     T50: 10.6920000016689 +/- 0.822571573173059
        Measured from: 0.780000001192093
                   to: 11.472000002861     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.124000012874603     
                   to: 0.875999987125397     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.64399999380112     
                   to: 38.9839999973774     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.868813   1.269822   1.042163   0.245698
           0.046626   0.047695   0.041179   0.032112 [error]
 Peak      0.033778   0.065288   0.089398   0.031699
           0.007899   0.008238   0.008154   0.006043 [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 3.00e-07 5.62e-07 8.13e-07 2.50e-06 2.31e-06 4.16e-06   erg/cm2
              Error 2.52e-08 2.77e-08 4.13e-08 2.88e-07 1.02e-07 3.10e-07   erg/cm2
Peak flux Power-law 3.65e-01 5.03e-01 5.13e-01 9.54e-01 1.69e+00 2.34e+00   ph/cm2/s
              Error 9.43e-02 7.98e-02 6.13e-02 2.49e-01 2.09e-01 2.86e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.81e-07 5.73e-07 8.36e-07 1.74e-06 2.28e-06 3.43e-06   erg/cm2
              Error 3.19e-08 3.10e-08 4.85e-08 6.95e-07 1.09e-07 6.73e-07   erg/cm2
Peak flux Cutoff-PL 3.35e-01 5.08e-01 5.34e-01 7.51e-01 1.67e+00 2.13e+00   ph/cm2/s
              Error 1.19e-01 8.39e-02 8.31e-02 4.08e-01 2.12e-01 4.55e-01   ph/cm2/s
 
Fluence        Band 2.73e-07 5.75e-07 8.27e-07 2.10e-06 2.27e-06 3.79e-06   erg/cm2
              Error 3.39e-08 3.44e-08 5.14e-08 7.67e-07 1.10e-07 8.13e-07   erg/cm2
Peak flux      Band 3.31e-01 5.12e-01 5.33e-01 8.44e-01 1.67e+00 2.22e+00   ph/cm2/s
              Error 9.27e-02 8.95e-02 8.27e-02 2.75e-01 2.17e-01 3.13e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.467    0.077    -      -           5.42e-03 2.29e-04   55.764 57
CPL   1.177    0.318     156.9 4949.5      7.38e-03 2.52e-03   53.223 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.971    0.206    -      -           1.47e-02 1.78e-03   74.682 57
CPL   0.728    0.711     324.7 5000.0      1.85e-02 1.65e-02   74.351 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: 17.792000 sec.
T50 in the 50-300 keV band: 7.552000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   44.628   -5.644   38.984
T90    28.436   -3.712   24.724
T50    10.692    0.780   11.472
Peak    1.000   -0.124    0.876

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  240.9229 +66.6004 0.0046   34.9 -131.8       3.2323    41.4  TRIG_00208169       
------------------------------------------
 
Foreground time interval of the image:
 -5.644  15.093 (delta_t =  20.737 [sec])
Background time interval of the image:
-210.707  -5.644 (delta_t = 205.063 [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   -5.644 sec. to   38.984 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46655     ( -7.755351E-02   7.732153E-02) )
Norm@50keV  : 5.421254E-03    ( -2.291058E-04   2.291063E-04) )
------------------------------------------------------------
 Chi-Squared =      55.76434     using    59 PHA bins.
 Reduced chi-squared =     0.9783217     for     57 degrees of freedom
 Null hypothesis probability = 0.522
 
Photon flux (15-150 keV)    in 44.63 sec: 0.670882 ( -0.031322  0.031433 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30853e-06 ( -1.02243e-07  1.02404e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -5.644 sec. to   38.984 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17750     ( -0.331780   0.304990 )
Epeak [keV] : 156.874      ( -55.8840 9843.13 )
Norm@50keV  : 7.376982E-03    ( -2.002862E-03   3.031228E-03) )
------------------------------------------------------------
 Chi-Squared =      53.22348     using    59 PHA bins.
 Reduced chi-squared =     0.9504194     for     56 degrees of freedom
 Null hypothesis probability = 0.581
 
Photon flux (15-150 keV)    in 44.63 sec: 0.659814 ( -0.016927  0.033261 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.27691e-06 ( -1.10736e-07  1.0788e-07 ) ergs/cm2
 
Band function
Time interval is from   -5.644 sec. to   38.984 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.05348   ( -0.397959   2.27611 )
beta        : -1.67187    ( -8.32813   0.227152 )
Epeak [keV] : 115.628      ( -91.1056 883.042 )
Norm@50keV   : 8.622109E-03    ( -3.061322E-03   1.409078E-02) )
------------------------------------------------------------
 Chi-Squared =      52.91591     using    59 PHA bins.
 Reduced chi-squared =     0.9621075     for     55 degrees of freedom
 Null hypothesis probability = 0.555
 
Photon flux (15-150 keV)    in 44.63 sec: 0.657366 ( -0.034171  0.03408 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.26774e-06 ( -1.0995e-07  1.09406e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.124 sec. to    0.876 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.971280     ( -0.210176   0.201959 )
Norm@50keV  : 1.466508E-02    ( -1.790461E-03   1.767475E-03) )
------------------------------------------------------------
 Chi-Squared =      74.68172     using    59 PHA bins.
 Reduced chi-squared =      1.310206     for     57 degrees of freedom
 Null hypothesis probability = 5.805E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 1.68630 ( -0.20871  0.20932 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.60214e-07 ( -1.9252e-08  1.9311e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.124 sec. to    0.876 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.728108     ( -0.993693   0.428028 )
Epeak [keV] : 324.740      ( -324.730 9675.26 )
Norm@50keV  : 1.853112E-02    ( -5.461087E-03   2.756659E-02) )
------------------------------------------------------------
 Chi-Squared =      74.35052     using    59 PHA bins.
 Reduced chi-squared =      1.327688     for     56 degrees of freedom
 Null hypothesis probability = 5.096E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 1.67230 ( -0.2118  0.21284 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59777e-07 ( -1.9207e-08  1.9552e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.124 sec. to    0.876 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.778062   ( -9.22194   5.77806 )
beta        : -0.971286    ( -8.81758   0.405767 )
Epeak [keV] : 65.1652      ( -198.911 9800.99 )
Norm@50keV   : 2.414022E-02    ( -9.208518E-03   282526. )
------------------------------------------------------------
 Chi-Squared =      74.68173     using    59 PHA bins.
 Reduced chi-squared =      1.357850     for     55 degrees of freedom
 Null hypothesis probability = 3.987E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 1.66527 ( -0.21653  0.21838 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59743e-07 ( -1.9643e-08  1.9497e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 21:42:52 EST 2007