batgrbproduct Analysis for Trigger=260304

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 13:17:34 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger260304/GCN5_download_cron
======================================================================

  Trigger: 00260304      Segment: 000

  BAT Trigger Time: 193002936   [s; MET]
      Trigger Stop: 193003256   [s; MET]
               UTC: 2007-02-12T19:55:34.239780    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 299.95071696654   Dec: 34.913974860868  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.25
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.25

  Flight Position:   [ source = BAT ]
    RA: 299.95071696654   Dec: 34.913974860868  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 299.964937755881   Dec: 34.9270079753423  [deg; J2000]  
        { 19h 59m 51.6s , +34d 55' 37.2" }
         +/- 3.5894879657619 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.93272144785869 [arcmin] (formal 1-sigma fit error)
    SNR: 4.90021128586274
    RA  =  19h 59m 51.6s  (299.964938 deg.)
    Dec =  34d 55' 37" (34.927008 deg.)
 
  Angular difference between Flight and Ground position is 1.049270 arcmin
 
  Partial Coding Fraction: 0.09765625    [ including projection effects ]

  Duration
     T90: 419.008000016212 +/- 38.1175881940934
        Measured from: 30.1839999854565
                   to: 449.192000001669     [s; relative to TRIGTIME]
     T50: 245.631999999285 +/- 46.3092077089747
        Measured from: 121.576000005007
                   to: 367.208000004292     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 20.2439999878407     
                   to: 21.2439999878407     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 20.2639999985695     
                   to: 466.152000010014     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.998945   4.383640   3.216574   1.315877
           0.361562   0.365970   0.324812   0.284247 [error]
 Peak      0.038282   0.041445   0.027923   0.044883
           0.019301   0.020017   0.016309   0.015244 [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 1.35e-06 2.21e-06 2.75e-06 6.75e-06 8.21e-06 1.30e-05   erg/cm2
              Error 2.21e-07 2.21e-07 3.16e-07 1.66e-06 7.80e-07 1.89e-06   erg/cm2
Peak flux Power-law 4.38e-01 4.13e-01 2.71e-01 2.75e-01 1.23e+00 1.40e+00   ph/cm2/s
              Error 3.47e-01 3.13e-01 1.08e-01 2.02e-01 6.22e-01 6.10e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.27e-06 2.28e-06 2.84e-06 4.49e-06 8.12e-06 1.07e-05   erg/cm2
              Error 2.66e-07 2.58e-07 3.67e-07 3.00e-06 8.07e-07 3.08e-06   erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   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
 
Fluence        Band 1.25e-06 2.30e-06 2.73e-06 6.22e-06 8.12e-06 1.25e-05   erg/cm2
              Error 2.71e-07 2.64e-07 3.04e-07 1.90e-06 7.85e-07 2.08e-06   erg/cm2
Peak flux      Band 3.61e-01 4.35e-01 3.09e-01 2.28e-01 1.15e+00 1.34e+00   ph/cm2/s
              Error 2.72e-01 1.58e-01 2.49e-01 7.73e-01 1.00e+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    1.689    0.159    -      -           1.99e-03 1.83e-04   68.894 57
CPL   1.360    0.571     103.6 4968.4      2.87e-03 1.92e-03   68.044  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.609    0.666    -      -           9.58e-03 4.06e-03   66.522 57
CPL   1.286    0.000     143.6    0.0      1.30e-02 0.00e+00   66.490 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  445.888   20.264  466.152
T90   419.008   30.184  449.192
T50   245.632  121.576  367.208
Peak    1.000   20.244   21.244

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  299.9649 +34.9270 0.0394   55.7   -6.5       6.9276     4.9  TRIG_00260304       
------------------------------------------
 
Foreground time interval of the image:
 20.264 466.152 (delta_t = 445.888 [sec])
Background time interval of the image:
-239.000  20.264 (delta_t = 259.264 [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   20.264 sec. to  466.152 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68901     ( -0.158392   0.159875 )
Norm@50keV  : 1.987019E-03    ( -1.836868E-04   1.830596E-04) )
------------------------------------------------------------
 Chi-Squared =      68.89354     using    59 PHA bins.
 Reduced chi-squared =      1.208659     for     57 degrees of freedom
 Null hypothesis probability = 0.134
 
Photon flux (15-150 keV)    in 445.9 sec: 0.262893 ( -0.026302  0.026449 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.21103e-06 ( -7.78541e-07  7.81351e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   20.264 sec. to  466.152 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36004     ( -0.682285   0.460226 )
Epeak [keV] : 103.643      ( -40.4940 9896.36 )
Norm@50keV  : 2.866651E-03    ( -7.166627E-04   3.116170E-03) )
------------------------------------------------------------
 Chi-Squared =      68.04359     using    59 PHA bins.
 but latest trial   41.0542     gives Chi-Squared =   3.06068
 but latest trial  1.709117E-03 gives Chi-Squared =   7.16656
 Reduced chi-squared =      1.215064     for     56 degrees of freedom
 Null hypothesis probability = 0.130
 
Photon flux (15-150 keV)    in 445.9 sec: 0.258887 ( -0.02722  0.013709 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.11605e-06 ( -8.1399e-07  8.00703e-07 ) ergs/cm2
 
Band function
Time interval is from   20.264 sec. to  466.152 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.32226   ( -0.498482   0.646253 )
beta        : -9.01759    ( -0.982410   7.46123 )
Epeak [keV] : 98.4876      ( -34.6566 9901.51 )
Norm@50keV   : 2.981000E-03    ( -1.143826E-03   3.010965E-03) )
------------------------------------------------------------
 Chi-Squared =      68.05597     using    59 PHA bins.
 Reduced chi-squared =      1.237381     for     55 degrees of freedom
 Null hypothesis probability = 0.111
 
Photon flux (15-150 keV)    in 445.9 sec: 0.258881 ( -0.027258  0.02739 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.11614e-06 ( -7.71853e-07  7.98696e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   20.264 sec. to   21.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60885     ( -0.709569   0.622030 )
Norm@50keV  : 9.582595E-03    ( -4.194981E-03   3.931507E-03) )
------------------------------------------------------------
 Chi-Squared =      66.52232     using    59 PHA bins.
 Reduced chi-squared =      1.167058     for     57 degrees of freedom
 Null hypothesis probability = 0.182
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.23483 ( -0.610194  0.6336 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.58706e-08 ( -3.41913e-08  3.42475e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   20.264 sec. to   21.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28579     (     )
Epeak [keV] : 143.646      (   )
Norm@50keV  : 1.304925E-02    (     )
------------------------------------------------------------
 Chi-Squared =      66.48973     using    59 PHA bins.
 Reduced chi-squared =      1.187317     for     56 degrees of freedom
 Null hypothesis probability = 0.159
 
Photon flux (15-150 keV)    in 0.9600 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   20.264 sec. to   21.224 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.765579   ( -12.5944   2.40558 )
beta        : -1.87543    ( -7.81267   1.15207 )
Epeak [keV] : 82.1366      ( -47.5094 9952.39 )
Norm@50keV   : 2.310978E-02    ( -6.36804   4.09900 )
------------------------------------------------------------
 Chi-Squared =      66.39400     using    59 PHA bins.
 Reduced chi-squared =      1.207164     for     55 degrees of freedom
 Null hypothesis probability = 0.140
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.14844 ( -0.560537  0.98602 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.67154e-08 ( -3.44689e-08  3.42437e-08 ) ergs/cm2
 
Plot creation:
Thu Dec 13 13:57:47 EST 2007