batgrbproduct Analysis for Trigger=306793

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Mar 20 02:45:39 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger306793/GCN5_download_cron
======================================================================

  Trigger: 00306793      Segment: 000

  BAT Trigger Time: 227639112   [s; MET]
      Trigger Stop: 227639176   [s; MET]
               UTC: 2008-03-19T17:05:09.345180    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 99.4803719736166   Dec: 23.9335194811168  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.22
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.22

  Flight Position:   [ source = BAT ]
    RA: 99.4803719736166   Dec: 23.9335194811168  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 99.4801094074848   Dec: 23.9643361537032  [deg; J2000]  
        { 06h 37m 55.2s , +23d 57' 51.6" }
         +/- 2.68166581428596 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.12801827153751 [arcmin] (formal 1-sigma fit error)
    SNR: 7.43210315743331
    RA  =   6h 37m 55.2s  (99.480109 deg.)
    Dec =   23d 57' 52" (23.964336 deg.)
 
  Angular difference between Flight and Ground position is 1.849056 arcmin
 
  Partial Coding Fraction: 0.59375    [ including projection effects ]

  Duration
     T90: 26.9120000004768 +/- 4.54080343748093
        Measured from: 7.27200001478195
                   to: 34.1840000152588     [s; relative to TRIGTIME]
     T50: 16.3440000116825 +/- 5.62053379547734
        Measured from: 12.5999999940395
                   to: 28.944000005722     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 25.3479999899864     
                   to: 26.3479999899864     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 5.33199998736382     
                   to: 34.4760000109673     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.192598   0.234799   0.084869   0.041047
           0.034686   0.035494   0.034406   0.036790 [error]
 Peak      0.017231  -0.001800   0.005095   0.026185
           0.006504   0.006538   0.006420   0.006958 [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 6.70e-08 9.27e-08 9.48e-08 1.77e-07 3.11e-07 4.30e-07   erg/cm2
              Error 1.68e-08 1.77e-08 3.16e-08 1.17e-07 7.34e-08 1.53e-07   erg/cm2
Peak flux Power-law 4.43e-04 3.37e-03 2.29e-02 8.30e-01 8.21e-02 8.61e-01   ph/cm2/s
              Error 6.80e-02 4.77e-02 4.57e-02 6.87e-01 1.40e-01 7.14e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.13e-08 1.18e-07 4.94e-08 2.19e-09 2.31e-07 2.30e-07   erg/cm2
              Error 1.93e-08 2.93e-08 4.75e-08 8.37e-08 8.00e-08 1.27e-07   erg/cm2
Peak flux Cutoff-PL 3.23e-04 2.76e-03 2.11e-02 9.27e-01 7.97e-02 9.53e-01   ph/cm2/s
              Error 6.56e-02 4.64e-02 4.41e-02 7.39e-01 1.39e-01 7.63e-01   ph/cm2/s
 
Fluence        Band 6.17e-08 1.13e-07 6.86e-08 5.34e-08 2.68e-07 3.12e-07   erg/cm2
              Error 1.95e-08 2.66e-08 5.50e-08 5.44e-08 7.55e-08 1.22e-07   erg/cm2
Peak flux      Band 4.81e-02 4.50e-02 5.31e-02 8.24e-01 5.49e-02 2.25e-01   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 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    1.966    0.352    -      -           1.16e-03 2.84e-04   61.143 57
CPL  -0.358    2.487      35.1   33.5      3.61e-02 0.00e+00   58.382  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -1.596    3.109    -      -           2.92e-04 1.21e-03   72.712 57
CPL  -0.738    0.000    9998.5 5000.0      4.66e-04 1.09e-03   73.928 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   29.144    5.332   34.476
T90    26.912    7.272   34.184
T50    16.344   12.600   28.944
Peak    1.000   25.348   26.348

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   99.4801 +23.9643 0.0259   33.9 -141.4       0.5488     7.4  TRIG_00306793       
------------------------------------------
 
Foreground time interval of the image:
  5.332  34.476 (delta_t =  29.144 [sec])
Background time interval of the image:
-119.000   5.332 (delta_t = 124.332 [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    5.332 sec. to   34.476 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.96639     ( -0.336773   0.367001 )
Norm@50keV  : 1.159418E-03    ( -2.876024E-04   2.796696E-04) )
------------------------------------------------------------
 Chi-Squared =      61.14302     using    59 PHA bins.
 Reduced chi-squared =      1.072685     for     57 degrees of freedom
 Null hypothesis probability = 0.330
 
Photon flux (15-150 keV)    in 29.14 sec: 0.171278 ( -0.031937  0.031939 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.11011e-07 ( -7.13496e-08  7.53881e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    5.332 sec. to   34.476 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.357917     ( -2.64208   2.33278 )
Epeak [keV] : 35.1112      ( -21.9206 44.9923 )
Norm@50keV  : 3.607533E-02    (     )
------------------------------------------------------------
 Chi-Squared =      58.38195     using    59 PHA bins.
 but latest trial   80.0895     gives Chi-Squared =   2.89006
 Reduced chi-squared =      1.042535     for     56 degrees of freedom
 Null hypothesis probability = 0.388
 
Photon flux (15-150 keV)    in 29.14 sec: 0.157032 ( -0.032242  0.034422 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30725e-07 ( -5.607e-08  1.03899e-07 ) ergs/cm2
 
Band function
Time interval is from    5.332 sec. to   34.476 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.05781   ( -4.00792   2.51716 )
beta        : -2.47333    ( -6.63786   1.23602 )
Epeak [keV] : 36.5385      ( -12.1240 18.2538 )
Norm@50keV   : 4.554773E-03    ( -0.843115   33.3338 )
------------------------------------------------------------
 Chi-Squared =      58.99425     using    59 PHA bins.
 Reduced chi-squared =      1.072623     for     55 degrees of freedom
 Null hypothesis probability = 0.332
 
Photon flux (15-150 keV)    in 29.14 sec: 0.164568 ( -0.034187  0.030885 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.6846e-07 ( -7.86626e-08  7.24289e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   25.348 sec. to   26.348 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.59647     ( -1.40353   4.81464 )
Norm@50keV  : 2.919056E-04    ( -2.919056E-04   2.123746E-03) )
------------------------------------------------------------
 Chi-Squared =      72.71151     using    59 PHA bins.
 Reduced chi-squared =      1.275640     for     57 degrees of freedom
 Null hypothesis probability = 7.842E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 8.210241E-02 ( -0.0779991  0.201965 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45246e-08 ( -1.45246e-08  1.97529e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   25.348 sec. to   26.348 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.737850     (     )
Epeak [keV] : 9998.53      ( -9998.52 1.47168 )
Norm@50keV  : 4.659266E-04    ( -9.976821E-05   2.084943E-03) )
------------------------------------------------------------
 Chi-Squared =      73.92817     using    59 PHA bins.
 Reduced chi-squared =      1.320146     for     56 degrees of freedom
 Null hypothesis probability = 5.452E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 7.974762E-02 ( -0.0797476  0.19756 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.43105e-08 ( -1.43105e-08  1.9749e-08 ) ergs/cm2
 
Band function
Time interval is from   25.348 sec. to   26.348 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.962539   ( -8.583069E-05   14.9999 )
beta        : -1.02298    ( -4.88952   8.27240 )
Epeak [keV] : 17.6633      ( -17.5633 9982.34 )
Norm@50keV   : 2.113282E-03    ( -3.183673E-02   0.294044 )
------------------------------------------------------------
 Chi-Squared =      74.38805     using    59 PHA bins.
 Reduced chi-squared =      1.352510     for     55 degrees of freedom
 Null hypothesis probability = 4.188E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 5.486210E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30985e-08 ( 0  0 ) ergs/cm2
 
Plot creation:
Thu Mar 20 03:00:27 EDT 2008