batgrbproduct Analysis for Trigger=358422

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Mon Jul 27 14:15:47 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger358422/GCN5_download_cron
======================================================================

  Trigger: 00358422      Segment: 000

  BAT Trigger Time: 270340952.704   [s; MET]
      Trigger Stop: 270340964.864   [s; MET]
               UTC: 2009-07-26T22:42:27.759160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 248.818572808623   Dec: 72.8709899504922  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.07
     Image Trigger?:     NO
     Rate S/N Ratio:     12.9614813968157  [ if not an image trigger ]
     Image S/N Ratio:    11.07

  Flight Position:   [ source = BAT ]
    RA: 248.818572808623   Dec: 72.8709899504922  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 248.672142091278   Dec: 72.8660877615832  [deg; J2000]  
        { 16h 34m 41.3s , +72d 51' 57.9" }
         +/- 1.67471063637264 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.738216546391998 [arcmin] (formal 1-sigma fit error)
    SNR: 14.5614428665054
 
  Angular difference between Flight and Ground position is 2.604663 arcmin
 
  Partial Coding Fraction: 0.859375    [ including projection effects ]

  Duration
     T90: 59.3120000362396 +/- 15.4574575178678
        Measured from: -17.0319998860359
                   to: 42.2800001502037     [s; relative to TRIGTIME]
     T50: 20.8159999847412 +/- 10.2994896640971
        Measured from: -2.27999985218048
                   to: 18.5360001325607     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.66000002622604     
                   to: 8.66000002622604     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -18.1679999828339     
                   to: 54.3280000090599     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.688056   0.633892   0.234964   0.064247
           0.049248   0.051397   0.047234   0.045930 [error]
 Peak      0.022374   0.049093   0.019034   0.009630
           0.006256   0.006613   0.005922   0.005494 [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 2.20e-07 2.56e-07 2.14e-07 3.01e-07 7.98e-07 9.91e-07   erg/cm2
              Error 2.74e-08 2.54e-08 4.14e-08 1.12e-07 9.39e-08 1.64e-07   erg/cm2
Peak flux Power-law 3.08e-01 2.64e-01 1.54e-01 1.34e-01 7.84e-01 8.60e-01   ph/cm2/s
              Error 8.38e-02 5.18e-02 4.51e-02 7.40e-02 1.54e-01 1.74e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.08e-07 2.82e-07 1.91e-07 6.49e-08 7.27e-07 7.45e-07   erg/cm2
              Error 3.06e-08 3.49e-08 5.21e-08 1.26e-07 1.04e-07 1.64e-07   erg/cm2
Peak flux Cutoff-PL 2.36e-01 3.73e-01 1.11e-01 2.75e-03 7.23e-01 7.23e-01   ph/cm2/s
              Error 9.13e-02 8.19e-02 6.00e-02 1.60e-02 1.48e-01 1.48e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 2.27e-01 6.98e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.259    0.197    -      -           1.16e-03 1.62e-04   56.150 57
CPL   1.345    0.858      27.3    0.0      4.16e-03 0.00e+00   52.570 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.775    0.325    -      -           5.74e-03 1.32e-03   70.960 57
CPL  -1.928    0.278      40.3    9.0      9.90e-01 0.00e+00   63.010 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   72.496  -18.168   54.328
T90    59.312  -17.032   42.280
T50    20.816   -2.280   18.536
Peak    1.000    7.660    8.660

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  248.6721 +72.8661 0.0132   28.5 -171.9       1.7260    14.6  TRIG_00358422       
------------------------------------------
 
Foreground time interval of the image:
-18.168  54.328 (delta_t =  72.496 [sec])
Background time interval of the image:
-239.704 -133.824 (delta_t = 105.880 [sec])
-132.704 -18.168 (delta_t = 114.536 [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  -18.168 sec. to   54.328 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.25909     ( -0.190515   0.203694 )
Norm@50keV  : 1.16029E-03    ( -0.00016367   0.000161206 )
------------------------------------------------------------
# Chi-Squared =          56.15 using 59 PHA bins.
# Reduced chi-squared =         0.9851 for     57 degrees of freedom 
# Null hypothesis probability =   5.069984e-01
 
Photon flux (15-150 keV)    in 72.5 sec: 0.198259 ( -0.0184884  0.0184891 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.98131e-07 ( -9.24911e-08  9.53027e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -18.168 sec. to   54.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34511     ( -1.04714   0.668715 )
Epeak [keV] : 27.3223      (   )
Norm@50keV  : 4.16151E-03    (     )
------------------------------------------------------------
# Chi-Squared =          52.57 using 59 PHA bins.
# Reduced chi-squared =         0.9387 for     56 degrees of freedom 
# Null hypothesis probability =   6.055141e-01
 
Photon flux (15-150 keV)    in 72.5 sec: 0.191406 ( -0.019255  0.01934 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.27349e-07 ( -9.80925e-08  1.0999e-07 ) ergs/cm2
 
Band function
Time interval is from  -18.168 sec. to   54.328 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.29730   ( -0.477492   1.00707 )
beta        : -9.37167    ( 10   20 )
Epeak [keV] : 28.4147      ( -8.8579 8.27584 )
Norm@50keV   : 4.37594E-03    ( -0.00430047   0.0254729 )
------------------------------------------------------------
# Chi-Squared =          52.59 using 59 PHA bins.
# Reduced chi-squared =         0.9562 for     55 degrees of freedom 
# Null hypothesis probability =   5.671414e-01
 
Photon flux (15-150 keV)    in 72.5 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    7.656 sec. to    8.664 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77547     ( -0.314681   0.334722 )
Norm@50keV  : 5.74336E-03    ( -0.00133271   0.00130615 )
------------------------------------------------------------
# Chi-Squared =          70.96 using 59 PHA bins.
# Reduced chi-squared =          1.245 for     57 degrees of freedom 
# Null hypothesis probability =   1.012084e-01
 
Photon flux (15-150 keV)    in 1.008 sec: 0.783950 ( -0.15411  0.154112 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.33407e-08 ( -1.23686e-08  1.28938e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    7.656 sec. to    8.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.92832     ( 1.61647   2.17244 )
Epeak [keV] : 40.3083      ( -6.58506 11.475 )
Norm@50keV  : 0.989653    (     )
------------------------------------------------------------
# Chi-Squared =          63.01 using 59 PHA bins.
# Reduced chi-squared =          1.125 for     56 degrees of freedom 
# Null hypothesis probability =   2.423412e-01
 
Photon flux (15-150 keV)    in 1.008 sec: 0.722785 ( -0.143975  0.152576 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.06754e-08 ( -8.89338e-09  1.17912e-08 ) ergs/cm2
 
Band function
Time interval is from    7.656 sec. to    8.664 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.39830   ( -5.67534   -5.06838 )
beta        : -3.00209    ( 3.00213   0.93034 )
Epeak [keV] : 34.9527      ( -6.49067 8.14405 )
Norm@50keV   : 50.4841    ( -50.5147   10.9824 )
------------------------------------------------------------
# Chi-Squared =          62.25 using 59 PHA bins.
# Reduced chi-squared =          1.132 for     55 degrees of freedom 
# Null hypothesis probability =   2.339092e-01
 
Photon flux (15-150 keV)    in 1.008 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Mon Jul 27 15:00:43 EDT 2009