batgrbproduct Analysis for Trigger=306869

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Mar 20 12:37:09 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger306869/GCN5_download_cron
======================================================================

  Trigger: 00306869      Segment: 000

  BAT Trigger Time: 227690184   [s; MET]
      Trigger Stop: 227690248   [s; MET]
               UTC: 2008-03-20T07:16:21.343760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 19.6986376691473   Dec: 63.7644947903169  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.16
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.16

  Flight Position:   [ source = BAT ]
    RA: 19.6986376691473   Dec: 63.7644947903169  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 19.731267823421   Dec: 63.8266751633481  [deg; J2000]  
        { 01h 18m 55.5s , +63d 49' 36.0" }
         +/- 2.97787502363589 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.80177322439157 [arcmin] (formal 1-sigma fit error)
    SNR: 6.39895625369035
    RA  =   1h 18m 55.5s  (19.731268 deg.)
    Dec =   63d 49' 36" (63.826675 deg.)
 
  Angular difference between Flight and Ground position is 3.829677 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.210635   0.144388   0.019611   0.042991
           0.034627   0.034530   0.030661   0.027045 [error]
 Peak      0.210635   0.144388   0.019611   0.042991
           0.034627   0.034530   0.030661   0.027045 [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 6.36e-08 5.08e-08 2.74e-08 2.15e-08 1.51e-07 1.64e-07   erg/cm2
              Error 1.54e-08 1.74e-08 1.92e-08 2.88e-08 4.95e-08 6.54e-08   erg/cm2
Peak flux Power-law 3.30e-02 1.48e-02 3.99e-03 1.33e-03 5.26e-02 5.31e-02   ph/cm2/s
              Error 8.14e-03 4.84e-03 3.56e-03 1.83e-03 1.24e-02 1.27e-02   ph/cm2/s
 
Fluence   Cutoff-PL 6.77e-08 5.13e-08 3.78e-09 6.21e-12 1.23e-07 1.23e-07   erg/cm2
              Error 1.72e-08 2.29e-08 2.00e-08 2.09e-08 3.09e-08 5.71e-08   erg/cm2
Peak flux Cutoff-PL 3.44e-02 1.57e-02 6.43e-04 5.63e-07 5.07e-02 5.07e-02   ph/cm2/s
              Error 8.91e-03 6.44e-03 2.88e-03 7.55e-04 1.16e-02 1.16e-02   ph/cm2/s
 
Fluence        Band 6.24e-08 5.32e-08 2.87e-08 2.25e-08 1.51e-07 1.81e-07   erg/cm2
              Error 1.41e-08 9.80e-09 1.13e-08 1.05e-08 3.60e-08 4.64e-08   erg/cm2
Peak flux      Band 3.51e-02 1.48e-02 1.12e-03 8.73e-05 5.09e-02 5.54e-02   ph/cm2/s
              Error 9.00e-03 5.39e-03 2.28e-03 9.28e-04 1.14e-02 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.893    0.614    -      -           2.07e-04 1.09e-04   43.389 57
CPL   0.247    2.487      17.3    9.2      1.96e-02 0.00e+00   41.802  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.893    0.614    -      -           2.07e-04 1.09e-04   43.389 57
CPL   0.247    2.514      17.3    9.2      1.96e-02 0.00e+00   41.802  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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   19.7313 +63.8267 0.0301    0.2  104.7       0.4377     6.4  TRIG_00306869       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [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   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.89301     ( -0.542734   0.685347 )
Norm@50keV  : 2.065145E-04    ( -1.013801E-04   1.159171E-04) )
------------------------------------------------------------
 Chi-Squared =      43.38884     using    59 PHA bins.
 Reduced chi-squared =     0.7612076     for     57 degrees of freedom
 Null hypothesis probability = 0.908
 
Photon flux (15-150 keV)    in 64.00 sec: 5.260334E-02 ( -0.0123468  0.0124357 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51495e-07 ( -4.61094e-08  5.2951e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 0.247474     ( -3.24747   1.72674 )
Epeak [keV] : 17.2933      ( -9.94572 8.45050 )
Norm@50keV  : 1.955544E-02    (     )
------------------------------------------------------------
 Chi-Squared =      41.80201     using    59 PHA bins.
 but latest trial   1.98035     gives Chi-Squared =  0.852200
 but latest trial   11.9255     gives Chi-Squared =  0.433018
 Reduced chi-squared =     0.7464644     for     56 degrees of freedom
 Null hypothesis probability = 0.921
 
Photon flux (15-150 keV)    in 64.00 sec: 5.069556E-02 ( -0.0115173  0.0116869 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22801e-07 ( -3.20506e-08  2.97888e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.46409   ( -8.53591   0.728704 )
beta        : -8.32878    ( -1.67122   18.3282 )
Epeak [keV] : 10.3071      ( -10.2071 11.0100 )
Norm@50keV   : 2.291619E-03    ( -6.085944E-04   220968. )
------------------------------------------------------------
 Chi-Squared =      42.33394     using    59 PHA bins.
 Reduced chi-squared =     0.7697080     for     55 degrees of freedom
 Null hypothesis probability = 0.894
 
Photon flux (15-150 keV)    in 64.00 sec: 5.085968E-02 ( -0.0113542  0.0113478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51326e-07 ( -3.4121e-08  3.78586e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.89301     ( -0.542734   0.685347 )
Norm@50keV  : 2.065145E-04    ( -1.013801E-04   1.159171E-04) )
------------------------------------------------------------
 Chi-Squared =      43.38884     using    59 PHA bins.
 Reduced chi-squared =     0.7612076     for     57 degrees of freedom
 Null hypothesis probability = 0.908
 
Photon flux (15-150 keV)    in 64.00 sec: 5.260334E-02 ( -0.0123468  0.0124357 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51495e-07 ( -4.61094e-08  5.2951e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.247474     ( -3.24747   1.78015 )
Epeak [keV] : 17.2933      ( -9.94572 8.45050 )
Norm@50keV  : 1.955544E-02    (     )
------------------------------------------------------------
 Chi-Squared =      41.80201     using    59 PHA bins.
 but latest trial   11.9255     gives Chi-Squared =  0.433018
 Reduced chi-squared =     0.7464644     for     56 degrees of freedom
 Null hypothesis probability = 0.921
 
Photon flux (15-150 keV)    in 64.00 sec: 5.069556E-02 ( -0.0115173  0.0116869 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22801e-07 ( -3.20506e-08  2.97888e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.46409   ( -8.53591   0.728704 )
beta        : -8.32878    ( -1.67122   18.3282 )
Epeak [keV] : 10.3071      ( -10.2071 11.0100 )
Norm@50keV   : 2.291619E-03    ( -6.085944E-04   220968. )
------------------------------------------------------------
 Chi-Squared =      42.33394     using    59 PHA bins.
 Reduced chi-squared =     0.7697080     for     55 degrees of freedom
 Null hypothesis probability = 0.894
 
Photon flux (15-150 keV)    in 64.00 sec: 5.085968E-02 ( -0.0113542  0.0113478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51326e-07 ( -3.4121e-08  3.78586e-08 ) ergs/cm2
 
Plot creation:
Thu Mar 20 12:46:19 EDT 2008