batgrbproduct Analysis for Trigger=304549

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Mar  3 14:16:43 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger304549/SDC
======================================================================

  Trigger: 00304549      Segment: 000

  BAT Trigger Time: 226228237.888   [s; MET]
      Trigger Stop: 226228238.4   [s; MET]
               UTC: 2008-03-03T09:10:35.271760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 112.073412725568   Dec: -70.2400675622224  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.67
     Image Trigger?:     NO
     Rate S/N Ratio:     12.6885775404495  [ if not an image trigger ]
     Image S/N Ratio:    7.67

  Flight Position:   [ source = BAT ]
    RA: 112.073412725568   Dec: -70.2400675622224  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 112.019374760461   Dec: -70.2313891521169  [deg; J2000]  
        { 07h 28m 04.6s , -70d 13' 53.0" }
         +/- 1.57541753928539 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.552967552774822 [arcmin] (formal 1-sigma fit error)
    SNR: 15.8900241345686
    RA  =   7h 28m  4.6s  (112.019375 deg.)
    Dec = -70d 13' 53" (-70.231389 deg.)
 
  Angular difference between Flight and Ground position is 1.213747 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 67.3640000224113 +/- 20.4871178935379
        Measured from: 0.223999977111816
                   to: 67.5879999995232     [s; relative to TRIGTIME]
     T50: 29.3600000143051 +/- 12.348733363983
        Measured from: 1.95199999213219
                   to: 31.3120000064373     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0600000023841858     
                   to: 1.06000000238419     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.232000023126602     
                   to: 73.2439999878407     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.265011   0.417137   0.291974   0.066406
           0.047736   0.047148   0.041377   0.036398 [error]
 Peak      0.054549   0.066610   0.028542   0.012207
           0.006826   0.007003   0.005909   0.005176 [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 9.33e-08 1.67e-07 2.29e-07 6.51e-07 6.61e-07 1.14e-06   erg/cm2
              Error 2.20e-08 2.30e-08 4.16e-08 2.63e-07 9.82e-08 2.93e-07   erg/cm2
Peak flux Power-law 5.32e-01 4.56e-01 2.67e-01 2.34e-01 1.36e+00 1.49e+00   ph/cm2/s
              Error 1.05e-01 5.85e-02 4.95e-02 8.49e-02 1.74e-01 1.91e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.34e-08 1.67e-07 2.29e-07 6.45e-07 6.61e-07 1.13e-06   erg/cm2
              Error 2.20e-08 2.30e-08 4.16e-08 2.62e-07 9.83e-08 2.91e-07   erg/cm2
Peak flux Cutoff-PL 5.05e-01 4.91e-01 2.67e-01 1.05e-01 1.33e+00 1.36e+00   ph/cm2/s
              Error 1.18e-01 9.02e-02 5.90e-02 1.55e-01 1.82e-01 2.46e-01   ph/cm2/s
 
Fluence        Band 8.78e-08 1.63e-07 2.31e-07 6.70e-07 6.64e-07 1.27e-06   erg/cm2
              Error 1.37e-08 2.37e-08 2.44e-08 1.35e-07 9.02e-08 2.07e-07   erg/cm2
Peak flux      Band 4.76e-01 5.25e-01 2.50e-01 1.56e-01 1.33e+00 1.41e+00   ph/cm2/s
              Error 1.25e-01 9.14e-02 5.67e-02 1.30e-01 1.76e-01 2.06e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.545    0.251    -      -           9.54e-04 1.29e-04   63.091 57
CPL   1.543    0.252    9987.1 5000.0      9.59e-04 1.30e-04   63.102 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.772    0.226    -      -           9.95e-03 1.42e-03   52.935 57
CPL   1.183    1.276      58.7 4980.3      2.18e-02 8.65e-02   52.164 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: 3.968000 sec.
T50 in the 50-300 keV band: 1.984000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   73.476   -0.232   73.244
T90    67.364    0.224   67.588
T50    29.360    1.952   31.312
Peak    1.000    0.060    1.060

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  112.0194 -70.2314 0.0121   30.7  -10.8       0.7093    15.9  TRIG_00304549       
------------------------------------------
 
Foreground time interval of the image:
 -0.232  13.717 (delta_t =  13.949 [sec])
Background time interval of the image:
-239.888  -0.232 (delta_t = 239.656 [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   -0.232 sec. to   73.244 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54473     ( -0.249574   0.251957 )
Norm@50keV  : 9.544257E-04    ( -1.298531E-04   1.282130E-04) )
------------------------------------------------------------
 Chi-Squared =      63.09071     using    59 PHA bins.
 Reduced chi-squared =      1.106854     for     57 degrees of freedom
 Null hypothesis probability = 0.270
 
Photon flux (15-150 keV)    in 73.48 sec: 0.120642 ( -0.016205  0.016263 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.60787e-07 ( -9.7746e-08  9.87314e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.232 sec. to   73.244 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54265     ( -0.251059   0.253411 )
Epeak [keV] : 9987.10      ( -9987.09 12.9014 )
Norm@50keV  : 9.586286E-04    ( -1.323388E-04   1.273004E-04) )
------------------------------------------------------------
 Chi-Squared =      63.10157     using    59 PHA bins.
 Reduced chi-squared =      1.126814     for     56 degrees of freedom
 Null hypothesis probability = 0.240
 
Photon flux (15-150 keV)    in 73.48 sec: 0.120596 ( -0.0162  0.016259 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.60762e-07 ( -9.77203e-08  9.88372e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.232 sec. to   73.244 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.10453   ( -8.89547   5.84595 )
beta        : -1.56499    ( -8.43501   0.269130 )
Epeak [keV] : 52.8240      ( -52.7240 9742.14 )
Norm@50keV   : 2.009832E-03    ( -2.009832E-03   1.38880 )
------------------------------------------------------------
 Chi-Squared =      63.07145     using    59 PHA bins.
 Reduced chi-squared =      1.146754     for     55 degrees of freedom
 Null hypothesis probability = 0.213
 
Photon flux (15-150 keV)    in 73.48 sec: 0.133939 ( -0.02897  2.08012 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.64145e-07 ( -8.6411e-08  9.39405e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.060 sec. to    1.060 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77213     ( -0.222330   0.229289 )
Norm@50keV  : 9.947819E-03    ( -1.432646E-03   1.403950E-03) )
------------------------------------------------------------
 Chi-Squared =      52.93517     using    59 PHA bins.
 Reduced chi-squared =     0.9286871     for     57 degrees of freedom
 Null hypothesis probability = 0.628
 
Photon flux (15-150 keV)    in 1.000 sec: 1.35626 ( -0.17379  0.17392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.16643e-08 ( -1.33566e-08  1.36677e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.060 sec. to    1.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18288     ( -1.54966   1.00295 )
Epeak [keV] : 58.7185      ( -19.3564 9941.28 )
Norm@50keV  : 2.176827E-02    ( -1.596954E-02   0.157049 )
------------------------------------------------------------
 Chi-Squared =      52.16449     using    59 PHA bins.
 Reduced chi-squared =     0.9315087     for     56 degrees of freedom
 Null hypothesis probability = 0.621
 
Photon flux (15-150 keV)    in 1.000 sec: 1.33150 ( -0.18292  0.18019 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.56739e-08 ( -1.68343e-08  1.67201e-08 ) ergs/cm2
 
Band function
Time interval is from    0.060 sec. to    1.060 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.624823   ( -9.37518   4.10734 )
beta        : -2.13275    ( -7.86725   0.454096 )
Epeak [keV] : 44.0323      ( -43.9323 9955.97 )
Norm@50keV   : 5.096999E-02    ( -0.371026   260.863 )
------------------------------------------------------------
 Chi-Squared =      50.24688     using    59 PHA bins.
 Reduced chi-squared =     0.9135797     for     55 degrees of freedom
 Null hypothesis probability = 0.656
 
Photon flux (15-150 keV)    in 1.000 sec: 1.32692 ( -0.17929  0.17192 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.67925e-08 ( -1.45885e-08  1.36705e-08 ) ergs/cm2
 
Plot creation:
Mon Mar  3 15:55:46 EST 2008