batgrbproduct Analysis for Trigger=346386

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Fri Mar 13 14:21:10 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger346386/GCN5_download_cron
======================================================================

  Trigger: 00346386      Segment: 000

  BAT Trigger Time: 258627992   [s; MET]
      Trigger Stop: 258628056   [s; MET]
               UTC: 2009-03-13T09:06:27.429120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 198.396961251434   Dec: 8.10658701409268  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.12
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.12

  Flight Position:   [ source = BAT ]
    RA: 198.396961251434   Dec: 8.10658701409268  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 198.400207553082   Dec: 8.08631230759155  [deg; J2000]  
        { 13h 13m 36.0s , +08d 05' 10.7" }
         +/- 2.17820711473199 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.914148175233534 [arcmin] (formal 1-sigma fit error)
    SNR: 10.0027534067998
 
  Angular difference between Flight and Ground position is 1.231672 arcmin
 
  Partial Coding Fraction: 0.1523438    [ including projection effects ]

  Duration
     T90: 78.3199999928474 +/- 18.5772781539019
        Measured from: -17.4159999191761
                   to: 60.9040000736713     [s; relative to TRIGTIME]
     T50: 35.6639999747276 +/- 11.6276773127863
        Measured from: 1.11200007796288
                   to: 36.7760000526905     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.86000001430511     
                   to: 5.86000001430511     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.2560000121593     
                   to: 66.6480000019073     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.879004   0.939413   0.586542   0.148250
           0.125918   0.122761   0.108138   0.095361 [error]
 Peak      0.033915   0.038639   0.013252   0.030864
           0.014149   0.013705   0.011404   0.010784 [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 2.81e-07 4.02e-07 4.29e-07 8.51e-07 1.38e-06 1.95e-06   erg/cm2
              Error 6.24e-08 5.91e-08 1.06e-07 4.28e-07 2.41e-07 5.33e-07   erg/cm2
Peak flux Power-law 3.43e-01 2.56e-01 1.27e-01 8.99e-02 7.68e-01 8.16e-01   ph/cm2/s
              Error 2.32e-01 1.09e-01 1.10e-01 1.50e-01 3.33e-01 3.48e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.77e-07 4.08e-07 4.31e-07 7.03e-07 1.36e-06 1.82e-06   erg/cm2
              Error 6.92e-08 7.09e-08 1.08e-07 5.14e-07 2.55e-07 6.84e-07   erg/cm2
Peak flux Cutoff-PL 3.43e-01 2.56e-01 1.27e-01 8.93e-02 7.68e-01 8.15e-01   ph/cm2/s
              Error 2.32e-01 1.09e-01 1.10e-01 1.49e-01 3.33e-01 3.48e-01   ph/cm2/s
 
Fluence        Band 2.74e-07 4.06e-07 4.30e-07 6.99e-07 1.36e-06 1.85e-06   erg/cm2
              Error 6.85e-08 7.06e-08 1.09e-07 6.66e-07 2.58e-07 4.63e-07   erg/cm2
Peak flux      Band 2.84e-01 2.53e-01 1.39e-01 8.99e-02 7.68e-01 8.14e-01   ph/cm2/s
              Error 2.03e-01 1.08e-01 6.82e-02 3.83e-02 3.30e-01 3.51e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.907    0.287    -      -           1.70e-03 3.03e-04   48.460 57
CPL   1.797    0.847      85.4 5000.0      1.95e-03 4.21e-03   48.425  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.010    1.104    -      -           5.10e-03 2.95e-03   65.459 57
CPL   2.009    1.109    9997.2    1.4      5.10e-03 2.96e-03   65.459 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   87.904  -21.256   66.648
T90    78.320  -17.416   60.904
T50    35.664    1.112   36.776
Peak    1.000    4.860    5.860

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  198.4002  +8.0863 0.0193   36.0   97.5       2.3839    10.0  TRIG_00346386       
------------------------------------------
 
Foreground time interval of the image:
 -9.799  66.648 (delta_t =  76.447 [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  -21.256 sec. to   66.648 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90670     ( -0.275332   0.297800 )
Norm@50keV  : 1.702751E-03    ( -3.091864E-04   2.972289E-04) )
------------------------------------------------------------
 Chi-Squared =      48.45963     using    59 PHA bins.
 Reduced chi-squared =     0.8501689     for     57 degrees of freedom
 Null hypothesis probability = 0.782
 
Photon flux (15-150 keV)    in 87.90 sec: 0.245060 ( -0.036308  0.036352 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37634e-06 ( -2.38983e-07  2.43993e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -21.256 sec. to   66.648 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.79662     ( -1.18964   0.504096 )
Epeak [keV] : 85.3645      ( -85.3545 9914.64 )
Norm@50keV  : 1.953110E-03    ( -1.953110E-03   6.469452E-03) )
------------------------------------------------------------
 Chi-Squared =      48.42492     using    59 PHA bins.
 but latest trial   2.29558     gives Chi-Squared =  0.191681
 Reduced chi-squared =     0.8647307     for     56 degrees of freedom
 Null hypothesis probability = 0.754
 
Photon flux (15-150 keV)    in 87.90 sec: 0.243866 ( -0.035824  0.037052 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36438e-06 ( -2.61379e-07  2.48968e-07 ) ergs/cm2
 
Band function
Time interval is from  -21.256 sec. to   66.648 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.68958   ( -8.31042   1.07092 )
beta        : -9.07095    ( -0.929045   7.43958 )
Epeak [keV] : 66.7968      ( -173.232 9826.67 )
Norm@50keV   : 2.213581E-03    ( -3.707679E-04   6.706240E-03) )
------------------------------------------------------------
 Chi-Squared =      48.45689     using    59 PHA bins.
 Reduced chi-squared =     0.8810343     for     55 degrees of freedom
 Null hypothesis probability = 0.721
 
Photon flux (15-150 keV)    in 87.90 sec: 0.243866 ( -0.037834  0.037207 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36243e-06 ( -2.61054e-07  2.54356e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    4.856 sec. to    5.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.00967     ( -0.914927   1.29338 )
Norm@50keV  : 5.096095E-03    ( -3.270939E-03   2.623434E-03) )
------------------------------------------------------------
 Chi-Squared =      65.45939     using    59 PHA bins.
 Reduced chi-squared =      1.148410     for     57 degrees of freedom
 Null hypothesis probability = 0.207
 
Photon flux (15-150 keV)    in 1.008 sec: 0.767979 ( -0.33287  0.332761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.74156e-08 ( -2.40078e-08  2.48397e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.856 sec. to    5.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.00946     ( -0.919014   1.29872 )
Epeak [keV] : 9997.16      ( 0.00000 2.84082 )
Norm@50keV  : 5.098400E-03    ( -3.285705E-03   2.634326E-03) )
------------------------------------------------------------
 Chi-Squared =      65.45934     using    59 PHA bins.
 Reduced chi-squared =      1.168917     for     56 degrees of freedom
 Null hypothesis probability = 0.181
 
Photon flux (15-150 keV)    in 1.008 sec: 0.767630 ( -0.332767  0.33265 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.73764e-08 ( -2.39773e-08  2.48784e-08 ) ergs/cm2
 
Band function
Time interval is from    4.856 sec. to    5.864 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.52877   ( -8.47123   6.52877 )
beta        : -1.98907    ( -8.01093   0.892196 )
Epeak [keV] : 14.0290      ( -13.9290 9985.97 )
Norm@50keV   : 1.476337E-02    ( -1.476337E-02   359.074 )
------------------------------------------------------------
 Chi-Squared =      65.46107     using    59 PHA bins.
 Reduced chi-squared =      1.190201     for     55 degrees of freedom
 Null hypothesis probability = 0.158
 
Photon flux (15-150 keV)    in 1.008 sec: 0.767998 ( -0.331995  0.327432 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.77296e-08 ( -2.41457e-08  2.03501e-08 ) ergs/cm2
 
Plot creation:
Fri Mar 13 14:39:37 EDT 2009