batgrbproduct Analysis for Trigger=349510

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.44
    Process Start Time (local time): Sat Apr 18 15:33:01 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger349510/GCN5_download_cron
======================================================================

  Trigger: 00349510      Segment: 000

  BAT Trigger Time: 261745664.896   [s; MET]
      Trigger Stop: 261745665.92   [s; MET]
               UTC: 2009-04-18T11:07:40.226940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 269.33377128532   Dec: 33.4087902749121  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.16
     Image Trigger?:     NO
     Rate S/N Ratio:     16.9410743460974  [ if not an image trigger ]
     Image S/N Ratio:    8.16

  Flight Position:   [ source = BAT ]
    RA: 269.33377128532   Dec: 33.4087902749121  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 269.319901660802   Dec: 33.4067707414425  [deg; J2000]  
        { 17h 57m 16.8s , +33d 24' 24.4" }
         +/- 1.42597471588349 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.541791298222326 [arcmin] (formal 1-sigma fit error)
    SNR: 18.321398877576
 
  Angular difference between Flight and Ground position is 0.705168 arcmin
 
  Partial Coding Fraction: 0.3164062    [ including projection effects ]

  Duration
     T90: 56.1959999799728 +/- 4.12921107301137
        Measured from: -2.99199989438057
                   to: 53.2040000855923     [s; relative to TRIGTIME]
     T50: 29.4560000002384 +/- 2.9338063976611
        Measured from: 13.3440001010895
                   to: 42.8000001013279     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0640000104904175     
                   to: 1.06400001049042     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.50799998641014     
                   to: 61.1119999885559     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.668192   2.414087   2.078136   0.633483
           0.072642   0.075235   0.070566   0.062680 [error]
 Peak      0.051496   0.073449   0.073570   0.028661
           0.011088   0.012150   0.011649   0.009949 [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 6.06e-07 1.12e-06 1.61e-06 4.86e-06 4.58e-06 8.14e-06   erg/cm2
              Error 4.31e-08 4.64e-08 6.98e-08 4.82e-07 1.72e-07 5.22e-07   erg/cm2
Peak flux Power-law 5.59e-01 6.09e-01 4.73e-01 6.02e-01 1.87e+00 2.24e+00   ph/cm2/s
              Error 1.69e-01 1.13e-01 9.20e-02 2.46e-01 3.17e-01 3.73e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.98e-07 1.13e-06 1.62e-06 4.51e-06 4.57e-06 7.81e-06   erg/cm2
              Error 5.12e-08 4.92e-08 7.26e-08 9.86e-07 1.73e-07 1.00e-06   erg/cm2
Peak flux Cutoff-PL 5.56e-01 6.09e-01 4.73e-01 5.98e-01 1.87e+00 2.20e+00   ph/cm2/s
              Error 1.69e-01 1.13e-01 9.21e-02 2.44e-01 3.17e-01 4.58e-01   ph/cm2/s
 
Fluence        Band 5.99e-07 1.12e-06 1.61e-06 4.82e-06 4.58e-06 8.20e-06   erg/cm2
              Error 5.03e-08 4.62e-08 7.65e-08 9.80e-07 1.80e-07 1.00e-06   erg/cm2
Peak flux      Band 5.45e-01 6.14e-01 4.75e-01 5.99e-01 1.86e+00 2.25e+00   ph/cm2/s
              Error 1.78e-01 1.32e-01 9.10e-02 2.38e-01 3.24e-01 3.74e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.484    0.066    -      -           6.92e-03 2.46e-04   35.091 57
CPL   1.436    0.175     643.2    0.0      7.27e-03 2.47e-04   35.105 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.366    0.286    -      -           1.54e-02 2.52e-03   48.037 57
CPL   1.278    2.127     439.6    0.0      1.70e-02 2.53e-03   48.061  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: 52.608000 sec.
T50 in the 50-300 keV band: 32.704000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   69.620   -8.508   61.112
T90    56.196   -2.992   53.204
T50    29.456   13.344   42.800
Peak    1.000    0.064    1.064

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  269.3199 +33.4068 0.0106   46.3    1.8       1.6414    18.3  TRIG_00349510       
------------------------------------------
 
Foreground time interval of the image:
 -8.508  10.105 (delta_t =  18.613 [sec])
Background time interval of the image:
-239.896  -8.508 (delta_t = 231.388 [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   -8.508 sec. to   61.112 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48413     ( -6.634724E-02   6.641805E-02) )
Norm@50keV  : 6.919038E-03    ( -2.459362E-04   2.459325E-04) )
------------------------------------------------------------
 Chi-Squared =      35.09059     using    59 PHA bins.
 Reduced chi-squared =     0.6156244     for     57 degrees of freedom
 Null hypothesis probability = 0.990
 
Photon flux (15-150 keV)    in 69.62 sec: 0.860135 ( -0.03374  0.033908 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.58183e-06 ( -1.71627e-07  1.71843e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -8.508 sec. to   61.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43608     ( -0.237288   0.112225 )
Epeak [keV] : 643.209      (   )
Norm@50keV  : 7.268983E-03    ( -2.462436E-04   2.472829E-04) )
------------------------------------------------------------
 Chi-Squared =      35.10469     using    59 PHA bins.
 Reduced chi-squared =     0.6268694     for     56 degrees of freedom
 Null hypothesis probability = 0.987
 
Photon flux (15-150 keV)    in 69.62 sec: 0.859711 ( -0.033721  0.033891 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.56892e-06 ( -1.71697e-07  1.74099e-07 ) ergs/cm2
 
Band function
Time interval is from   -8.508 sec. to   61.112 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.07547   ( -3.02577   8.40345 )
beta        : -1.50261    ( -6.652427E-02   6.640315E-02) )
Epeak [keV] : 72.9234      ( -72.8234 9927.08 )
Norm@50keV   : 1.262716E-02    ( -3.342652E-02   3.342563E-02) )
------------------------------------------------------------
 Chi-Squared =      35.23755     using    59 PHA bins.
 Reduced chi-squared =     0.6406826     for     55 degrees of freedom
 Null hypothesis probability = 0.982
 
Photon flux (15-150 keV)    in 69.62 sec: 0.855107 ( -0.039148  0.035649 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.57804e-06 ( -1.87375e-07  1.72094e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.064 sec. to    1.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36601     ( -0.285651   0.285573 )
Norm@50keV  : 1.543763E-02    ( -2.526076E-03   2.522987E-03) )
------------------------------------------------------------
 Chi-Squared =      48.03652     using    59 PHA bins.
 Reduced chi-squared =     0.8427460     for     57 degrees of freedom
 Null hypothesis probability = 0.795
 
Photon flux (15-150 keV)    in 1.000 sec: 1.86602 ( -0.31607  0.31732 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50246e-07 ( -2.6789e-08  2.6981e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.064 sec. to    1.064 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27775     ( -1.02860   3.22502 )
Epeak [keV] : 439.594      (   )
Norm@50keV  : 1.701705E-02    ( -2.537209E-03   2.532271E-03) )
------------------------------------------------------------
 Chi-Squared =      48.06094     using    59 PHA bins.
 but latest trial   3.86089     gives Chi-Squared =   2.54469
 Reduced chi-squared =     0.8582310     for     56 degrees of freedom
 Null hypothesis probability = 0.766
 
Photon flux (15-150 keV)    in 1.000 sec: 1.86548 ( -0.31598  0.31722 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.49948e-07 ( -2.7281e-08  2.739e-08 ) ergs/cm2
 
Band function
Time interval is from    0.064 sec. to    1.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.954326   ( -9.04567   5.78774 )
beta        : -1.37705    ( -8.62295   0.293076 )
Epeak [keV] : 65.5935      ( -65.4935 9933.91 )
Norm@50keV   : 3.092886E-02    ( -1.72289   1287.73 )
------------------------------------------------------------
 Chi-Squared =      47.97161     using    59 PHA bins.
 Reduced chi-squared =     0.8722112     for     55 degrees of freedom
 Null hypothesis probability = 0.738
 
Photon flux (15-150 keV)    in 1.000 sec: 1.86062 ( -0.33232  0.31507 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50073e-07 ( -2.6693e-08  2.7069e-08 ) ergs/cm2
 
Plot creation:
Sat Apr 18 15:49:18 EDT 2009