batgrbproduct Analysis for Trigger=341504

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Fri Jan 30 06:51:37 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger341504/GCN5_download_cron
======================================================================

  Trigger: 00341504      Segment: 000

  BAT Trigger Time: 254956039.744   [s; MET]
      Trigger Stop: 254956040   [s; MET]
               UTC: 2009-01-29T21:07:15.287600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 269.091866815445   Dec: -32.8258331356111  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.36
     Image Trigger?:     NO
     Rate S/N Ratio:     24.1246761636296  [ if not an image trigger ]
     Image S/N Ratio:    11.36

  Flight Position:   [ source = BAT ]
    RA: 269.091866815445   Dec: -32.8258331356111  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 269.104636585056   Dec: -32.7930096607758  [deg; J2000]  
        { 17h 56m 25.1s , -32d 47' 34.8" }
         +/- 0.696181169739153 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.239328670221731 [arcmin] (formal 1-sigma fit error)
    SNR: 51.027095429528
 
  Angular difference between Flight and Ground position is 2.072018 arcmin
 
  Partial Coding Fraction: 0.890625    [ including projection effects ]

  Duration
     T90: 17.5480000078678 +/- 2.70074359774358
        Measured from: 0.3960000872612
                   to: 17.944000095129     [s; relative to TRIGTIME]
     T50: 7.01199999451637 +/- 0.441542730559746
        Measured from: 2.09600010514259
                   to: 9.10800009965897     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.00400000810623     
                   to: 2.00400000810623     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.195999979972839     
                   to: 27.0040000081062     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.358417   1.498594   0.847881   0.117091
           0.036664   0.034151   0.029653   0.025489 [error]
 Peak      0.122158   0.183312   0.124782   0.029096
           0.008013   0.008217   0.007332   0.005792 [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 4.18e-07 6.10e-07 6.63e-07 1.35e-06 2.11e-06 3.04e-06   erg/cm2
              Error 2.41e-08 1.99e-08 3.09e-08 1.38e-07 7.04e-08 1.59e-07   erg/cm2
Peak flux Power-law 1.21e+00 1.23e+00 8.72e-01 9.86e-01 3.70e+00 4.30e+00   ph/cm2/s
              Error 1.17e-01 7.15e-02 6.16e-02 1.44e-01 2.05e-01 2.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.95e-07 6.23e-07 6.68e-07 8.64e-07 2.05e-06 2.51e-06   erg/cm2
              Error 3.08e-08 2.30e-08 3.22e-08 3.26e-07 6.51e-08 3.44e-07   erg/cm2
Peak flux Cutoff-PL 1.12e+00 1.27e+00 8.99e-01 6.09e-01 3.62e+00 3.90e+00   ph/cm2/s
              Error 1.42e-01 6.30e-02 6.84e-02 2.72e-01 2.17e-01 3.54e-01   ph/cm2/s
 
Fluence        Band 3.91e-07 6.21e-07 6.66e-07 9.82e-07 2.04e-06 2.69e-06   erg/cm2
              Error 3.47e-08 2.65e-08 3.81e-08 3.43e-07 8.81e-08 3.98e-07   erg/cm2
Peak flux      Band 1.12e+00 1.27e+00 8.97e-01 6.85e-01 3.61e+00 3.97e+00   ph/cm2/s
              Error 1.71e-01 1.17e-01 8.29e-02 2.16e-01 4.04e-01 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.880    0.064    -      -           8.42e-03 2.81e-04   48.653 57
CPL   1.578    0.265      68.2   54.8      1.19e-02 3.66e-03   44.613 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.493    0.098    -      -           2.97e-02 1.65e-03   47.961 57
CPL   1.068    0.406     109.6  240.9      4.86e-02 2.36e-02   44.424 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: 12.608000 sec.
T50 in the 50-300 keV band: 5.056000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   27.200   -0.196   27.004
T90    17.548    0.396   17.944
T50     7.012    2.096    9.108
Peak    1.000    1.004    2.004

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  269.1046 -32.7930 0.0037   18.2 -129.2       3.9266    51.0  TRIG_00341504       
------------------------------------------
 
Foreground time interval of the image:
 -0.196  27.004 (delta_t =  27.200 [sec])
Background time interval of the image:
-119.744 -116.182 (delta_t =   3.562 [sec])
-114.744  -0.196 (delta_t = 114.548 [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   -0.196 sec. to   27.004 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87985     ( -6.385219E-02   6.443191E-02) )
Norm@50keV  : 8.422011E-03    ( -2.819439E-04   2.807770E-04) )
------------------------------------------------------------
 Chi-Squared =      48.65317     using    59 PHA bins.
 Reduced chi-squared =     0.8535643     for     57 degrees of freedom
 Null hypothesis probability = 0.776
 
Photon flux (15-150 keV)    in 27.20 sec: 1.19844 ( -0.0412  0.04139 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10598e-06 ( -7.02086e-08  7.05078e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.196 sec. to   27.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57769     ( -0.273425   0.257333 )
Epeak [keV] : 68.2474      ( -13.1649 96.3748 )
Norm@50keV  : 1.193632E-02    ( -2.995774E-03   4.328231E-03) )
------------------------------------------------------------
 Chi-Squared =      44.61331     using    59 PHA bins.
 Reduced chi-squared =     0.7966663     for     56 degrees of freedom
 Null hypothesis probability = 0.863
 
Photon flux (15-150 keV)    in 27.20 sec: 1.16814 ( -0.04781  0.04769 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04614e-06 ( -8.71325e-08  4.31338e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.196 sec. to   27.004 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.57390   ( -0.260675   0.655651 )
beta        : -2.31428    ( -7.95180   0.161970 )
Epeak [keV] : 67.8276      ( -25.4337 103.886 )
Norm@50keV   : 1.199124E-02    ( -5.508755E-03   5.740498E-02) )
------------------------------------------------------------
 Chi-Squared =      44.59912     using    59 PHA bins.
 Reduced chi-squared =     0.8108932     for     55 degrees of freedom
 Null hypothesis probability = 0.841
 
Photon flux (15-150 keV)    in 27.20 sec: 1.16449 ( -0.05048  0.04931 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04228e-06 ( -8.55576e-08  9.0731e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.004 sec. to    2.004 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49334     ( -9.719098E-02   9.793007E-02) )
Norm@50keV  : 2.969739E-02    ( -1.657285E-03   1.652123E-03) )
------------------------------------------------------------
 Chi-Squared =      47.96122     using    59 PHA bins.
 Reduced chi-squared =     0.8414250     for     57 degrees of freedom
 Null hypothesis probability = 0.797
 
Photon flux (15-150 keV)    in 1.000 sec: 3.70081 ( -0.2047  0.20492 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.82013e-07 ( -1.7331e-08  1.7487e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.004 sec. to    2.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06772     ( -0.424411   0.387938 )
Epeak [keV] : 109.629      ( -32.1574 449.583 )
Norm@50keV  : 4.858321E-02    ( -1.720215E-02   2.990434E-02) )
------------------------------------------------------------
 Chi-Squared =      44.42416     using    59 PHA bins.
 Reduced chi-squared =     0.7932885     for     56 degrees of freedom
 Null hypothesis probability = 0.868
 
Photon flux (15-150 keV)    in 1.000 sec: 3.61876 ( -0.2172  0.21715 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.72565e-07 ( -1.9803e-08  1.9385e-08 ) ergs/cm2
 
Band function
Time interval is from    1.004 sec. to    2.004 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.648226   ( -0.787754   3.20889 )
beta        : -1.66930    ( -8.33070   0.188925 )
Epeak [keV] : 63.8900      ( -31.3540 372.334 )
Norm@50keV   : 9.081235E-02    ( -4.559695E-02   101.438 )
------------------------------------------------------------
 Chi-Squared =      44.18819     using    59 PHA bins.
 Reduced chi-squared =     0.8034217     for     55 degrees of freedom
 Null hypothesis probability = 0.851
 
Photon flux (15-150 keV)    in 1.000 sec: 3.60667 ( -0.21371  0.21794 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.7426e-07 ( -2.0349e-08  1.8212e-08 ) ergs/cm2
 
Plot creation:
Fri Jan 30 07:00:03 EST 2009