batgrbproduct Analysis for Trigger=207364

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 20:24:03 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger207364/GCN5_download_cron
======================================================================

  Trigger: 00207364      Segment: 000

  BAT Trigger Time: 167887369.216   [s; MET]
      Trigger Stop: 167887370.24   [s; MET]
               UTC: 2006-04-28T03:22:48.056420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 123.567655340779   Dec: -37.1647612611289  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.35
     Image Trigger?:     NO
     Rate S/N Ratio:     9.4339811320566  [ if not an image trigger ]
     Image S/N Ratio:    7.35

  Flight Position:   [ source = BAT ]
    RA: 123.567655340779   Dec: -37.1647612611289  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 123.545480111378   Dec: -37.1683727828689  [deg; J2000]  
        { 08h 14m 10.9s , -37d 10' 06.1" }
         +/- 0.948926198345982 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.305892368648468 [arcmin] (formal 1-sigma fit error)
    SNR: 32.7826056883397
    RA  =   8h 14m 10.9s  (123.545480 deg.)
    Dec = -37d 10'  6" (-37.168373 deg.)
 
  Angular difference between Flight and Ground position is 1.082180 arcmin
 
  Partial Coding Fraction: 0.65625    [ including projection effects ]

  Duration
     T90: 39.4959999918938 +/- 3.88719335656981
        Measured from: -1.77199998497963
                   to: 37.7240000069141     [s; relative to TRIGTIME]
     T50: 20.6200000047684 +/- 1.62665914689375
        Measured from: 4.09600001573563
                   to: 24.716000020504     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.22800001502037     
                   to: 5.22800001502037     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.81199997663498     
                   to: 42.9600000083447     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.983295   1.001005   0.505600   0.075377
           0.038437   0.038991   0.033742   0.028806 [error]
 Peak      0.091206   0.099290   0.058027   0.006271
           0.007094   0.007250   0.006038   0.004448 [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 3.25e-07 4.30e-07 4.17e-07 7.25e-07 1.41e-06 1.90e-06   erg/cm2
              Error 2.80e-08 2.18e-08 3.50e-08 1.28e-07 7.83e-08 1.58e-07   erg/cm2
Peak flux Power-law 1.05e+00 7.58e-01 3.64e-01 2.46e-01 2.28e+00 2.41e+00   ph/cm2/s
              Error 1.33e-01 6.44e-02 5.09e-02 6.61e-02 1.97e-01 2.05e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.15e-07 4.38e-07 4.17e-07 5.12e-07 1.38e-06 1.68e-06   erg/cm2
              Error 3.35e-08 2.57e-08 3.63e-08 2.80e-07 9.26e-08 3.05e-07   erg/cm2
Peak flux Cutoff-PL 9.70e-01 8.10e-01 3.68e-01 1.18e-01 2.23e+00 2.27e+00   ph/cm2/s
              Error 1.53e-01 8.32e-02 5.66e-02 9.65e-02 2.04e-01 2.26e-01   ph/cm2/s
 
Fluence        Band 1.89e-06 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 9.54e-08 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 9.70e-01 8.10e-01 3.68e-01 1.19e-01 2.23e+00 2.27e+00   ph/cm2/s
              Error 1.53e-01 8.32e-02 5.66e-02 9.63e-02 2.04e-01 2.26e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.042    0.106    -      -           3.06e-03 1.81e-04   40.410 57
CPL   1.825    0.360      36.9 4996.2      4.00e-03 2.08e-03   39.640  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.059    0.162    -      -           1.48e-02 1.56e-03   63.250 57
CPL   1.444    0.545      39.7   29.6      3.26e-02 3.21e-02   60.242  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: 40.576000 sec.
T50 in the 50-300 keV band: 22.528000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   49.772   -6.812   42.960
T90    39.496   -1.772   37.724
T50    20.620    4.096   24.716
Peak    1.000    4.228    5.228

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  123.5455 -37.1684 0.0059   25.4  137.9       1.5226    32.8  TRIG_00207364       
------------------------------------------
 
Foreground time interval of the image:
 -6.812   8.885 (delta_t =  15.697 [sec])
Background time interval of the image:
-239.216  -6.812 (delta_t = 232.404 [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   -6.812 sec. to   42.960 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.04170     ( -0.104878   0.107009 )
Norm@50keV  : 3.064893E-03    ( -1.820114E-04   1.799520E-04) )
------------------------------------------------------------
 Chi-Squared =      40.40976     using    59 PHA bins.
 Reduced chi-squared =     0.7089432     for     57 degrees of freedom
 Null hypothesis probability = 0.953
 
Photon flux (15-150 keV)    in 49.77 sec: 0.468773 ( -0.025305  0.025412 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41036e-06 ( -7.80095e-08  7.85371e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -6.812 sec. to   42.960 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.82474     ( -0.427271   0.292194 )
Epeak [keV] : 36.9096      ( -29.3481 9963.09 )
Norm@50keV  : 3.999658E-03    ( -1.448849E-03   2.702208E-03) )
------------------------------------------------------------
 Chi-Squared =      39.63959     using    59 PHA bins.
 but latest trial   2.11466     gives Chi-Squared =   1.33871
 but latest trial   32.4192     gives Chi-Squared =  6.419373E-02
 Reduced chi-squared =     0.7078498     for     56 degrees of freedom
 Null hypothesis probability = 0.952
 
Photon flux (15-150 keV)    in 49.77 sec: 0.462106 ( -0.02825  0.028106 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38209e-06 ( -9.49363e-08  9.03525e-08 ) ergs/cm2
 
Band function
Time interval is from   -6.812 sec. to   42.960 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.44334   ( -8.55666   2.49122 )
beta        : -2.15328    ( -7.84672   0.199890 )
Epeak [keV] : 33.3734      ( -35.0966 9964.80 )
Norm@50keV   : 7.092973E-03    ( -1.321235E-03   1029.25 )
------------------------------------------------------------
 Chi-Squared =      39.99802     using    59 PHA bins.
 Reduced chi-squared =     0.7272367     for     55 degrees of freedom
 Null hypothesis probability = 0.936
 
Photon flux (15-150 keV)    in 49.77 sec: 0.462065 ( -0.028249  0.028203 ) 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    4.228 sec. to    5.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.05932     ( -0.158277   0.165796 )
Norm@50keV  : 1.480610E-02    ( -1.577667E-03   1.546802E-03) )
------------------------------------------------------------
 Chi-Squared =      63.24965     using    59 PHA bins.
 Reduced chi-squared =      1.109643     for     57 degrees of freedom
 Null hypothesis probability = 0.265
 
Photon flux (15-150 keV)    in 1.000 sec: 2.28369 ( -0.19716  0.19737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37088e-07 ( -1.3416e-08  1.3565e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.228 sec. to    5.228 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44390     ( -0.706596   0.384049 )
Epeak [keV] : 39.6937      ( -39.6837 19.4356 )
Norm@50keV  : 3.263341E-02    ( -1.645276E-02   4.769596E-02) )
------------------------------------------------------------
 Chi-Squared =      60.24233     using    59 PHA bins.
 but latest trial   2.03276     gives Chi-Squared =   3.68054
 but latest trial  1.615945E-02 gives Chi-Squared =   4.03123
 Reduced chi-squared =      1.075756     for     56 degrees of freedom
 Null hypothesis probability = 0.325
 
Photon flux (15-150 keV)    in 1.000 sec: 2.22940 ( -0.20404  0.20415 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30807e-07 ( -1.4438e-08  1.4896e-08 ) ergs/cm2
 
Band function
Time interval is from    4.228 sec. to    5.228 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.44823   ( -0.586929   0.691951 )
beta        : -8.99981    ( -1.00019   6.96288 )
Epeak [keV] : 39.6968      ( -18.5611 19.4109 )
Norm@50keV   : 3.243011E-02    ( -1.716639E-02   4.790131E-02) )
------------------------------------------------------------
 Chi-Squared =      60.24253     using    59 PHA bins.
 Reduced chi-squared =      1.095319     for     55 degrees of freedom
 Null hypothesis probability = 0.292
 
Photon flux (15-150 keV)    in 1.000 sec: 2.22969 ( -0.20438  0.20397 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30708e-07 ( -1.4498e-08  1.4833e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 20:42:13 EST 2007