batgrbproduct Analysis for Trigger=203755

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 16:55:38 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger203755/SDC
======================================================================

  Trigger: 00203755      Segment: 000

  BAT Trigger Time: 165762738.24   [s; MET]
      Trigger Stop: 165762739.264   [s; MET]
               UTC: 2006-04-03T13:12:17.129580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 282.306272499452   Dec: 8.32978203469296  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.6
     Image Trigger?:     NO
     Rate S/N Ratio:     20.1246117974981  [ if not an image trigger ]
     Image S/N Ratio:    9.6

  Flight Position:   [ source = BAT ]
    RA: 282.306272499452   Dec: 8.32978203469296  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 282.337180178467   Dec: 8.33112455063393  [deg; J2000]  
        { 18h 49m 20.9s , +08d 19' 52.0" }
         +/- 1.05867051253617 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.3895287080206 [arcmin] (formal 1-sigma fit error)
    SNR: 28.0379195114703
    RA  =  18h 49m 20.9s  (282.337180 deg.)
    Dec =   8d 19' 52" (8.331125 deg.)
 
  Angular difference between Flight and Ground position is 1.836661 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 27.2760000228882 +/- 4.89690720027714
        Measured from: -4.16800001263618
                   to: 23.108000010252     [s; relative to TRIGTIME]
     T50: 14.1960000097752 +/- 1.75144282870157
        Measured from: 0.139999985694885
                   to: 14.33599999547     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.80399999022484     
                   to: 2.80399999022484     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.2320000231266     
                   to: 32.0839999914169     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.366584   0.714791   0.657997   0.166457
           0.034327   0.034398   0.029829   0.024450 [error]
 Peak      0.009803   0.052658   0.050147   0.015048
           0.005620   0.005874   0.005385   0.004144 [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 1.10e-07 2.63e-07 4.98e-07 2.29e-06 1.35e-06 3.16e-06   erg/cm2
              Error 1.21e-08 1.70e-08 2.78e-08 3.01e-07 7.27e-08 3.13e-07   erg/cm2
Peak flux Power-law 1.75e-01 2.68e-01 3.06e-01 6.71e-01 9.48e-01 1.42e+00   ph/cm2/s
              Error 5.04e-02 4.79e-02 3.96e-02 1.84e-01 1.28e-01 2.02e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.01e-07 2.69e-07 5.18e-07 1.46e-06 1.33e-06 2.34e-06   erg/cm2
              Error 1.50e-08 1.88e-08 3.43e-08 6.49e-07 7.70e-08 6.36e-07   erg/cm2
Peak flux Cutoff-PL 1.18e-01 2.76e-01 3.58e-01 2.71e-01 9.14e-01 1.02e+00   ph/cm2/s
              Error 5.99e-02 5.69e-02 5.62e-02 1.92e-01 1.30e-01 2.28e-01   ph/cm2/s
 
Fluence        Band 1.00e-07 2.68e-07 5.17e-07 1.46e-06 1.33e-06 2.36e-06   erg/cm2
              Error 1.48e-08 1.87e-08 3.43e-08 5.13e-07 7.69e-08 6.44e-07   erg/cm2
Peak flux      Band 1.18e-01 2.76e-01 3.58e-01 2.71e-01 9.14e-01 1.02e+00   ph/cm2/s
              Error 5.99e-02 5.69e-02 5.62e-02 1.90e-01 1.30e-01 2.28e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.078    0.092    -      -           3.34e-03 1.74e-04   54.708 57
CPL   0.732    0.368     210.3 3006.6      4.78e-03 1.82e-03   51.853  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.805    0.220    -      -           8.25e-03 1.14e-03   63.368 57
CPL  -0.484    1.151     118.3  101.4      2.81e-02 3.78e-02   58.090 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: 22.272000 sec.
T50 in the 50-300 keV band: 8.512000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   38.316   -6.232   32.084
T90    27.276   -4.168   23.108
T50    14.196    0.140   14.336
Peak    1.000    1.804    2.804

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  282.3372  +8.3311 0.0067    4.5   89.9       1.5827    28.0  TRIG_00203755       
------------------------------------------
 
Foreground time interval of the image:
 -6.232  17.765 (delta_t =  23.997 [sec])
Background time interval of the image:
-239.240  -6.232 (delta_t = 233.008 [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   -6.232 sec. to   32.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07816     ( -9.325331E-02   9.157407E-02) )
Norm@50keV  : 3.343846E-03    ( -1.740968E-04   1.733664E-04) )
------------------------------------------------------------
 Chi-Squared =      54.70811     using    59 PHA bins.
 Reduced chi-squared =     0.9597914     for     57 degrees of freedom
 Null hypothesis probability = 0.562
 
Photon flux (15-150 keV)    in 38.32 sec: 0.387087 ( -0.020997  0.021048 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34929e-06 ( -7.26049e-08  7.2785e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -6.232 sec. to   32.084 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.731513     ( -0.399370   0.335705 )
Epeak [keV] : 210.279      ( -82.5747 5930.55 )
Norm@50keV  : 4.777733E-03    ( -1.322078E-03   2.316162E-03) )
------------------------------------------------------------
 Chi-Squared =      51.85297     using    59 PHA bins.
 but latest trial   1.06931     gives Chi-Squared =   2.76872
 Reduced chi-squared =     0.9259459     for     56 degrees of freedom
 Null hypothesis probability = 0.633
 
Photon flux (15-150 keV)    in 38.32 sec: 0.381420 ( -0.021754  0.021652 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.32885e-06 ( -7.71841e-08  7.67396e-08 ) ergs/cm2
 
Band function
Time interval is from   -6.232 sec. to   32.084 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.285112   ( -3.71803   0.996858 )
beta        : -1.20277    ( -0.112954   0.120556 )
Epeak [keV] : 62.3643      ( -32.7617 132.115 )
Norm@50keV   : 2.136420E-02    ( -10.5535   15.6284 )
------------------------------------------------------------
 Chi-Squared =      49.80318     using    59 PHA bins.
 Reduced chi-squared =     0.9055125     for     55 degrees of freedom
 Null hypothesis probability = 0.673
 
Photon flux (15-150 keV)    in 38.32 sec: 0.377439 ( -0.022167  0.021444 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.32809e-06 ( -7.7211e-08  7.6571e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.804 sec. to    2.804 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.804511     ( -0.226531   0.213076 )
Norm@50keV  : 8.253448E-03    ( -1.146391E-03   1.126722E-03) )
------------------------------------------------------------
 Chi-Squared =      63.36795     using    59 PHA bins.
 Reduced chi-squared =      1.111718     for     57 degrees of freedom
 Null hypothesis probability = 0.262
 
Photon flux (15-150 keV)    in 1.000 sec: 0.948435 ( -0.127483  0.128205 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.62942e-08 ( -1.27571e-08  1.27858e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.804 sec. to    2.804 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.483748     ( -1.31077   0.991552 )
Epeak [keV] : 118.302      ( -31.0656 171.764 )
Norm@50keV  : 2.806648E-02    ( -1.683899E-02   5.877320E-02) )
------------------------------------------------------------
 Chi-Squared =      58.08962     using    59 PHA bins.
 Reduced chi-squared =      1.037315     for     56 degrees of freedom
 Null hypothesis probability = 0.398
 
Photon flux (15-150 keV)    in 1.000 sec: 0.914115 ( -0.12967  0.130755 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.32797e-08 ( -1.37402e-08  1.34603e-08 ) ergs/cm2
 
Band function
Time interval is from    1.804 sec. to    2.804 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.483723   ( -0.991466   1.15398 )
beta        : -9.24777    ( -0.752230   8.42591 )
Epeak [keV] : 118.303      ( -45.3867 171.818 )
Norm@50keV   : 2.806756E-02    ( -1.684042E-02   5.883461E-02) )
------------------------------------------------------------
 Chi-Squared =      58.08966     using    59 PHA bins.
 Reduced chi-squared =      1.056176     for     55 degrees of freedom
 Null hypothesis probability = 0.362
 
Photon flux (15-150 keV)    in 1.000 sec: 0.914047 ( -0.129583  0.130823 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.3159e-08 ( -1.3647e-08  1.3539e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 17:16:40 EST 2007