batgrbproduct Analysis for Trigger=337889

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Mon Dec 22 04:00:02 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger337889/GCN5_download_cron
======================================================================

  Trigger: 00337889      Segment: 000

  BAT Trigger Time: 251569275.2   [s; MET]
      Trigger Stop: 251569275.712   [s; MET]
               UTC: 2008-12-21T16:21:11.847580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 15.8049817084335   Dec: -24.5258354741473  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.37
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8452325786651  [ if not an image trigger ]
     Image S/N Ratio:    8.37

  Flight Position:   [ source = BAT ]
    RA: 15.8049817084335   Dec: -24.5258354741473  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 15.8009824543681   Dec: -24.5424389421762  [deg; J2000]  
        { 01h 03m 12.2s , -24d 32' 32.8" }
         +/- 0.71058906227833 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.16181809342373 [arcmin] (formal 1-sigma fit error)
    SNR: 49.5555071682021
 
  Angular difference between Flight and Ground position is 1.019844 arcmin
 
  Partial Coding Fraction: 0.6171875    [ including projection effects ]

  Duration
     T90: 33.4840000271797 +/- 0.801917699762502
        Measured from: 4.60400009155273
                   to: 38.0880001187325     [s; relative to TRIGTIME]
     T50: 9.06800001859665 +/- 0.135882302790745
        Measured from: 19.9120000898838
                   to: 28.9800001084805     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 21.4240000247955     
                   to: 22.4240000247955     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.283999979496002     
                   to: 112.572000026703     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     9.975714  12.585798   7.876630   1.175833
           0.072892   0.077765   0.069809   0.058963 [error]
 Peak      0.485867   0.826024   0.681741   0.157127
           0.012406   0.015401   0.014842   0.009038 [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 3.67e-06 5.44e-06 6.01e-06 1.25e-05 1.89e-05 2.78e-05   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 Power-law 5.47e+00 5.93e+00 4.58e+00 5.79e+00 1.82e+01 2.18e+01   ph/cm2/s
              Error 2.58e-01 1.71e-01 1.26e-01 3.34e-01 4.73e-01 5.29e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.05e-06 5.53e-06 6.35e-06 6.60e-06 1.82e-05 2.15e-05   erg/cm2
              Error 1.50e-07 1.03e-07 1.19e-07 7.36e-07 3.04e-07 8.10e-07   erg/cm2
Peak flux Cutoff-PL 4.66e+00 6.12e+00 4.91e+00 3.39e+00 1.76e+01 1.91e+01   ph/cm2/s
              Error 3.29e-01 1.88e-01 1.61e-01 5.09e-01 4.96e-01 7.33e-01   ph/cm2/s
 
Fluence        Band 3.02e-06 5.51e-06 6.33e-06 7.73e-06 1.81e-05 2.27e-05   erg/cm2
              Error 1.53e-07 1.04e-07 1.17e-07 1.49e-06 3.12e-07 1.76e-06   erg/cm2
Peak flux      Band 4.31e+00 6.31e+00 4.78e+00 4.57e+00 1.73e+01 2.00e+01   ph/cm2/s
              Error 4.09e-01 2.27e-01 1.65e-01 4.63e-01 5.10e-01 6.70e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.856    0.000    -      -           1.85e-02 0.00e+00  119.896 57
CPL   1.211    0.128      69.9    3.9      3.52e-02 4.43e-03   37.728 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.374    0.042    -      -           1.50e-01 3.63e-03  106.852 57
CPL   0.749    0.190     112.9   19.3      2.87e-01 5.61e-02   71.265 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: 29.504000 sec.
T50 in the 50-300 keV band: 7.296000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  112.856   -0.284  112.572
T90    33.484    4.604   38.088
T50     9.068   19.912   28.980
Peak    1.000   21.424   22.424

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   15.8010 -24.5424 0.0039   27.1   37.5       2.5547    49.6  TRIG_00337889       
------------------------------------------
 
Foreground time interval of the image:
 -0.284   7.901 (delta_t =   8.185 [sec])
Background time interval of the image:
-239.200  -0.284 (delta_t = 238.916 [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
Multiple GTIs in the spectrum
tstart tstop
-0.284000 105.450000
106.800000 112.572000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85556     (     )
Norm@50keV  : 1.845715E-02    (     )
------------------------------------------------------------
 Chi-Squared =      119.8963     using    59 PHA bins.
 Reduced chi-squared =      2.103444     for     57 degrees of freedom
 Null hypothesis probability = 2.246E-06
 
Photon flux (15-150 keV)    in 111.5 sec: 2.60024 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89203e-05 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.284000 105.450000
106.800000 112.572000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21106     ( -0.129802   0.126681 )
Epeak [keV] : 69.9263      ( -3.44485 4.39536 )
Norm@50keV  : 3.518464E-02    ( -4.102701E-03   4.761651E-03) )
------------------------------------------------------------
 Chi-Squared =      37.72836     using    59 PHA bins.
 Reduced chi-squared =     0.6737208     for     56 degrees of freedom
 Null hypothesis probability = 0.971
 
Photon flux (15-150 keV)    in 111.5 sec: 2.42377 ( -0.05669  0.05702 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.81588e-05 ( -3.03168e-07  3.04953e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.284000 105.450000
106.800000 112.572000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.20079   ( -0.134828   0.200371 )
beta        : -2.66804    ( -7.33196   0.461948 )
Epeak [keV] : 69.4969      ( -7.65054 4.72260 )
Norm@50keV   : 3.560728E-02    ( -5.173203E-03   9.844594E-03) )
------------------------------------------------------------
 Chi-Squared =      37.63891     using    59 PHA bins.
 Reduced chi-squared =     0.6843438     for     55 degrees of freedom
 Null hypothesis probability = 0.964
 
Photon flux (15-150 keV)    in 111.5 sec: 2.42133 ( -0.05786  0.05845 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.81218e-05 ( -3.06402e-07  3.17887e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   21.424 sec. to   22.424 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37378     ( -4.177260E-02   4.179788E-02) )
Norm@50keV  : 0.149948    ( -3.630847E-03   3.631100E-03) )
------------------------------------------------------------
 Chi-Squared =      106.8515     using    59 PHA bins.
 Reduced chi-squared =      1.874588     for     57 degrees of freedom
 Null hypothesis probability = 7.091E-05
 
Photon flux (15-150 keV)    in 1.000 sec: 18.1552 ( -0.4728  0.4734 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45688e-06 ( -3.7262e-08  3.7332e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   21.424 sec. to   22.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.749295     ( -0.193363   0.186567 )
Epeak [keV] : 112.863      ( -14.2348 24.4260 )
Norm@50keV  : 0.287360    ( -4.968825E-02   6.244338E-02) )
------------------------------------------------------------
 Chi-Squared =      71.26511     using    59 PHA bins.
 Reduced chi-squared =      1.272591     for     56 degrees of freedom
 Null hypothesis probability = 8.217E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 17.5689 ( -0.4943  0.4978 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41917e-06 ( -3.9759e-08  3.9588e-08 ) ergs/cm2
 
Band function
Time interval is from   21.424 sec. to   22.424 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.129339   ( -0.421764   0.663726 )
beta        : -1.67592    ( -0.139983   0.108726 )
Epeak [keV] : 70.1421      ( -14.3995 19.3748 )
Norm@50keV   : 0.645253    ( -0.268289   0.954286 )
------------------------------------------------------------
 Chi-Squared =      63.38693     using    59 PHA bins.
 Reduced chi-squared =      1.152490     for     55 degrees of freedom
 Null hypothesis probability = 0.205
 
Photon flux (15-150 keV)    in 1.000 sec: 17.3196 ( -0.529  0.4911 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41815e-06 ( -3.9679e-08  3.9598e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 22 04:22:02 EST 2008