batgrbproduct Analysis for Trigger=261225

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 14:24:44 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger261225/GCN5_download_cron
======================================================================

  Trigger: 00261225      Segment: 000

  BAT Trigger Time: 193591480   [s; MET]
      Trigger Stop: 193591800   [s; MET]
               UTC: 2007-02-19T15:24:38.225280    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 299.588800877955   Dec: 35.1930088954434  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    12.29
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.29

  Flight Position:   [ source = BAT ]
    RA: 299.588800877955   Dec: 35.1930088954434  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 299.579142424733   Dec: 35.2227776289544  [deg; J2000]  
        { 19h 58m 19.0s , +35d 13' 22.0" }
         +/- 3.15131563255167 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.06061175162189 [arcmin] (formal 1-sigma fit error)
    SNR: 5.90183534238608
    RA  =  19h 58m 19.0s  (299.579142 deg.)
    Dec =  35d 13' 22" (35.222778 deg.)
 
  Angular difference between Flight and Ground position is 1.847819 arcmin
 
  Partial Coding Fraction: 0.2304688    [ including projection effects ]

  Duration
     T90: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]
     T50: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 320 second)
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.207661   0.348657   0.341883   0.063753
           0.083212   0.073960   0.061861   0.050935 [error]
 Peak      0.207661   0.348657   0.341883   0.063753
           0.083212   0.073960   0.061861   0.050935 [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 1.17e-07 1.86e-07 2.21e-07 5.13e-07 6.73e-07 1.04e-06   erg/cm2
              Error 4.34e-08 4.30e-08 5.96e-08 2.92e-07 1.49e-07 3.39e-07   erg/cm2
Peak flux Power-law 1.15e-01 1.00e-01 5.97e-02 5.34e-02 2.98e-01 3.29e-01   ph/cm2/s
              Error 4.32e-02 2.38e-02 1.56e-02 2.80e-02 7.01e-02 7.15e-02   ph/cm2/s
 
Fluence   Cutoff-PL 8.40e-08 2.07e-07 2.52e-07 1.33e-07 6.35e-07 6.76e-07   erg/cm2
              Error 5.34e-08 5.29e-08 7.58e-08 3.16e-07 1.56e-07 2.19e-07   erg/cm2
Peak flux Cutoff-PL 8.09e-02 1.09e-01 6.91e-02 1.90e-02 2.74e-01 2.78e-01   ph/cm2/s
              Error 5.34e-02 2.84e-02 2.04e-02 3.24e-02 7.45e-02 8.06e-02   ph/cm2/s
 
Fluence        Band 8.44e-08 2.06e-07 2.51e-07 1.35e-07 6.36e-07 6.78e-07   erg/cm2
              Error 3.38e-08 3.93e-08 7.57e-08 2.81e-07 1.49e-07 2.13e-07   erg/cm2
Peak flux      Band 8.12e-02 1.09e-01 6.91e-02 1.91e-02 2.74e-01 2.78e-01   ph/cm2/s
              Error 5.02e-02 2.13e-02 1.46e-02 3.24e-02 7.39e-02 6.07e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.748    0.365    -      -           2.21e-03 4.81e-04   62.409 57
CPL   0.233    2.117      62.5 4977.8      1.14e-02 8.04e-02   60.111  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.748    0.365    -      -           2.21e-03 4.81e-04   62.409 57
CPL   0.233    2.117      62.5 4977.8      1.14e-02 8.04e-02   60.111  0
 
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  320.000    0.000  320.000
T90   320.000    0.000  320.000
T50   320.000    0.000  320.000
Peak  320.000    0.000  320.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  299.5791 +35.2228 0.0324   51.7 -165.6       0.9285     5.9  TRIG_00261225       
------------------------------------------
 
Foreground time interval of the image:
  0.000  33.057 (delta_t =  33.057 [sec])
Background time interval of the image:

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    0.000 sec. to   33.057 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74793     ( -0.359328   0.371205 )
Norm@50keV  : 2.206034E-03    ( -4.823143E-04   4.795631E-04) )
------------------------------------------------------------
 Chi-Squared =      62.40940     using    59 PHA bins.
 Reduced chi-squared =      1.094902     for     57 degrees of freedom
 Null hypothesis probability = 0.290
 
Photon flux (15-150 keV)    in 33.06 sec: 0.298071 ( -0.069519  0.070707 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.73135e-07 ( -1.49137e-07  1.49831e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   33.057 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.232940     ( -2.58333   1.65057 )
Epeak [keV] : 62.4660      ( -18.1599 9937.53 )
Norm@50keV  : 1.140098E-02    ( -1.140098E-02   0.149318 )
------------------------------------------------------------
 Chi-Squared =      60.11085     using    59 PHA bins.
 but latest trial   1.88609     gives Chi-Squared =   2.73544
 Reduced chi-squared =      1.073408     for     56 degrees of freedom
 Null hypothesis probability = 0.329
 
Photon flux (15-150 keV)    in 33.06 sec: 0.274007 ( -0.073418  0.075533 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.35086e-07 ( -1.5399e-07  1.57852e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   33.057 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.252511   ( -9.74749   2.34828 )
beta        : -9.35689    ( -0.643113   7.74059 )
Epeak [keV] : 62.5563      ( -9.16359 9937.44 )
Norm@50keV   : 1.117165E-02    ( -1.117165E-02   3.656737E-02) )
------------------------------------------------------------
 Chi-Squared =      60.11125     using    59 PHA bins.
 Reduced chi-squared =      1.092932     for     55 degrees of freedom
 Null hypothesis probability = 0.296
 
Photon flux (15-150 keV)    in 33.06 sec: 0.274170 ( -0.072487  0.075387 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.35641e-07 ( -1.53772e-07  1.44694e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   33.057 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74793     ( -0.359328   0.371205 )
Norm@50keV  : 2.206034E-03    ( -4.823143E-04   4.795631E-04) )
------------------------------------------------------------
 Chi-Squared =      62.40940     using    59 PHA bins.
 Reduced chi-squared =      1.094902     for     57 degrees of freedom
 Null hypothesis probability = 0.290
 
Photon flux (15-150 keV)    in 33.06 sec: 0.298071 ( -0.069519  0.070707 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.73135e-07 ( -1.49137e-07  1.49831e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   33.057 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.232940     ( -2.58333   1.65057 )
Epeak [keV] : 62.4660      ( -18.1599 9937.53 )
Norm@50keV  : 1.140098E-02    ( -1.140098E-02   0.149318 )
------------------------------------------------------------
 Chi-Squared =      60.11085     using    59 PHA bins.
 but latest trial   1.88609     gives Chi-Squared =   2.73544
 Reduced chi-squared =      1.073408     for     56 degrees of freedom
 Null hypothesis probability = 0.329
 
Photon flux (15-150 keV)    in 33.06 sec: 0.274007 ( -0.073418  0.075533 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.35086e-07 ( -1.5399e-07  1.57852e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   33.057 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.252511   ( -9.74749   2.34828 )
beta        : -9.35689    ( -0.643113   7.74059 )
Epeak [keV] : 62.5563      ( -9.16359 9937.44 )
Norm@50keV   : 1.117165E-02    ( -1.117165E-02   3.656737E-02) )
------------------------------------------------------------
 Chi-Squared =      60.11125     using    59 PHA bins.
 Reduced chi-squared =      1.092932     for     55 degrees of freedom
 Null hypothesis probability = 0.296
 
Photon flux (15-150 keV)    in 33.06 sec: 0.274170 ( -0.072487  0.075387 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.35641e-07 ( -1.53772e-07  1.44694e-07 ) ergs/cm2
 
Plot creation:
Thu Dec 13 14:30:33 EST 2007