batgrbproduct Analysis for Trigger=290624

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 11:24:32 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger290624/GCN5_download_cron
======================================================================

  Trigger: 00290624      Segment: 000

  BAT Trigger Time: 211183066.304   [s; MET]
      Trigger Stop: 211183067.328   [s; MET]
               UTC: 2007-09-11T05:57:44.087900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 25.7991691907814   Dec: -33.4728088428944  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.5
     Image Trigger?:     NO
     Rate S/N Ratio:     17.4928556845359  [ if not an image trigger ]
     Image S/N Ratio:    10.5

  Flight Position:   [ source = BAT ]
    RA: 25.7991691907814   Dec: -33.4728088428944  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 25.8099812686414   Dec: -33.4791487468178  [deg; J2000]  
        { 01h 43m 14.4s , -33d 28' 44.9" }
         +/- 0.508168425467487 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.15286907199678 [arcmin] (formal 1-sigma fit error)
    SNR: 80.0032099978069
    RA  =   1h 43m 14.4s  (25.809981 deg.)
    Dec = -33d 28' 45" (-33.479149 deg.)
 
  Angular difference between Flight and Ground position is 0.661440 arcmin
 
  Partial Coding Fraction: 0.8828125    [ including projection effects ]

  Duration
     T90: 158.583999991417 +/- 6.06081844959174
        Measured from: -28.1079999804497
                   to: 130.476000010967     [s; relative to TRIGTIME]
     T50: 65.9239999949932 +/- 1.38297069939194
        Measured from: 21.9640000164509
                   to: 87.8880000114441     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 36.1280000209808     
                   to: 37.1280000209808     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -64.311999976635     
                   to: 158.800000011921     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.939369   7.980241   5.067826   0.953378
           0.084941   0.087054   0.076846   0.065883 [error]
 Peak      0.110973   0.181382   0.155117   0.040748
           0.006244   0.007059   0.006808   0.004944 [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 2.10e-06 3.37e-06 4.08e-06 9.67e-06 1.23e-05 1.92e-05   erg/cm2
              Error 9.09e-08 8.00e-08 9.26e-08 5.42e-07 2.30e-07 5.62e-07   erg/cm2
Peak flux Power-law 1.11e+00 1.27e+00 1.04e+00 1.42e+00 3.94e+00 4.85e+00   ph/cm2/s
              Error 9.74e-02 6.67e-02 5.52e-02 1.62e-01 1.84e-01 2.26e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.00e-06 3.38e-06 4.13e-06 8.00e-06 1.22e-05 1.75e-05   erg/cm2
              Error 1.30e-07 8.13e-08 1.07e-07 1.66e-06 2.66e-07 1.59e-06   erg/cm2
Peak flux Cutoff-PL 1.01e+00 1.31e+00 1.09e+00 9.47e-01 3.87e+00 4.36e+00   ph/cm2/s
              Error 1.21e-01 7.44e-02 6.71e-02 3.00e-01 1.91e-01 3.57e-01   ph/cm2/s
 
Fluence        Band 1.98e-06 3.37e-06 4.12e-06 8.01e-06 1.22e-05 1.77e-05   erg/cm2
              Error 1.29e-07 8.12e-08 1.07e-07 1.55e-06 2.73e-07 1.59e-06   erg/cm2
Peak flux      Band 1.01e+00 1.31e+00 1.09e+00 9.47e-01 3.87e+00 4.36e+00   ph/cm2/s
              Error 1.21e-01 7.45e-02 6.71e-02 3.00e-01 1.91e-01 3.57e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.724    0.040    -      -           5.99e-03 1.12e-04   49.816 57
CPL   1.564    0.165     157.3 3966.4      7.02e-03 1.14e-03   47.040  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.290    0.080    -      -           3.31e-02 1.49e-03   51.184 57
CPL   0.883    0.328     150.0  165.3      5.14e-02 1.83e-02   46.179 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: 158.272000 sec.
T50 in the 50-300 keV band: 63.104000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  223.112  -64.312  158.800
T90   158.584  -28.108  130.476
T50    65.924   21.964   87.888
Peak    1.000   36.128   37.128

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   25.8100 -33.4791 0.0024   21.2  156.6      13.8845    80.0  TRIG_00290624       
------------------------------------------
 
Foreground time interval of the image:
-64.312 -28.952 (delta_t =  35.360 [sec])
-28.304  73.797 (delta_t = 102.101 [sec])
Background time interval of the image:
-299.304 -121.034 (delta_t = 178.270 [sec])
-120.304 -64.312 (delta_t =  55.992 [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
Multiple GTIs in the spectrum
tstart tstop
-64.312000 -28.952000
-28.304000 158.800000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72430     ( -3.993869E-02   3.997898E-02) )
Norm@50keV  : 5.991497E-03    ( -1.119650E-04   1.119520E-04) )
------------------------------------------------------------
 Chi-Squared =      49.81606     using    59 PHA bins.
 Reduced chi-squared =     0.8739659     for     57 degrees of freedom
 Null hypothesis probability = 0.739
 
Photon flux (15-150 keV)    in 222.5 sec: 0.802613 ( -0.019461  0.019618 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23197e-05 ( -2.29042e-07  2.31556e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-64.312000 -28.952000
-28.304000 158.800000
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56431     ( -0.172310   0.157804 )
Epeak [keV] : 157.350      ( -52.5117 7880.39 )
Norm@50keV  : 7.015064E-03    ( -1.015175E-03   1.263811E-03) )
------------------------------------------------------------
 Chi-Squared =      47.03970     using    59 PHA bins.
 but latest trial   1.72358     gives Chi-Squared =   2.78006
 but latest trial  5.999691E-03 gives Chi-Squared =   2.72640
 Reduced chi-squared =     0.8399946     for     56 degrees of freedom
 Null hypothesis probability = 0.797
 
Photon flux (15-150 keV)    in 222.5 sec: 0.787499 ( -0.024082  0.024493 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21782e-05 ( -2.74231e-07  2.57922e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-64.312000 -28.952000
-28.304000 158.800000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.56300   ( -0.164159   0.171003 )
beta        : -7.99667    ( -2.00333   6.27481 )
Epeak [keV] : 156.503      ( -51.6914 7789.48 )
Norm@50keV   : 7.021805E-03    ( -8.134888E-04   1.255845E-03) )
------------------------------------------------------------
 Chi-Squared =      47.03978     using    59 PHA bins.
 Reduced chi-squared =     0.8552688     for     55 degrees of freedom
 Null hypothesis probability = 0.769
 
Photon flux (15-150 keV)    in 222.5 sec: 0.787527 ( -0.024157  0.024476 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21657e-05 ( -2.74498e-07  2.7234e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   36.128 sec. to   37.128 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28964     ( -8.047557E-02   8.036840E-02) )
Norm@50keV  : 3.310292E-02    ( -1.486391E-03   1.486354E-03) )
------------------------------------------------------------
 Chi-Squared =      51.18364     using    59 PHA bins.
 Reduced chi-squared =     0.8979586     for     57 degrees of freedom
 Null hypothesis probability = 0.692
 
Photon flux (15-150 keV)    in 1.000 sec: 3.94183 ( -0.1839  0.18415 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.27954e-07 ( -1.6287e-08  1.6342e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   36.128 sec. to   37.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.882708     ( -0.340475   0.314564 )
Epeak [keV] : 150.028      ( -44.9820 285.663 )
Norm@50keV  : 5.136662E-02    ( -1.445074E-02   2.205019E-02) )
------------------------------------------------------------
 Chi-Squared =      46.17896     using    59 PHA bins.
 Reduced chi-squared =     0.8246242     for     56 degrees of freedom
 Null hypothesis probability = 0.822
 
Photon flux (15-150 keV)    in 1.000 sec: 3.87236 ( -0.19114  0.19104 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.21289e-07 ( -1.7626e-08  1.7347e-08 ) ergs/cm2
 
Band function
Time interval is from   36.128 sec. to   37.128 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.882780   ( -0.314514   0.340598 )
beta        : -9.23402    ( -0.765976   4.92633 )
Epeak [keV] : 149.996      ( -44.9777 285.195 )
Norm@50keV   : 5.136164E-02    ( -1.445229E-02   2.205900E-02) )
------------------------------------------------------------
 Chi-Squared =      46.17893     using    59 PHA bins.
 Reduced chi-squared =     0.8396170     for     55 degrees of freedom
 Null hypothesis probability = 0.796
 
Photon flux (15-150 keV)    in 1.000 sec: 3.87231 ( -0.19129  0.19135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.21003e-07 ( -1.7604e-08  1.734e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 14 11:36:43 EST 2007