batgrbproduct Analysis for Trigger=163170

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 18:00:29 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger163170/GCN5_download_cron
======================================================================

  Trigger: 00163170      Segment: 000

  BAT Trigger Time: 153218379.2   [s; MET]
      Trigger Stop: 153218383.296   [s; MET]
               UTC: 2005-11-09T08:39:39.370220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 345.43961754781   Dec: 38.6721088138371  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.84
     Image Trigger?:     NO
     Rate S/N Ratio:     15.0665191733194  [ if not an image trigger ]
     Image S/N Ratio:    9.84

  Flight Position:   [ source = BAT ]
    RA: 345.43961754781   Dec: 38.6721088138371  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 345.463610671997   Dec: 38.65927104705  [deg; J2000]  
        { 23h 01m 51.3s , +38d 39' 33.4" }
         +/- 1.98272537813421 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.823740005588431 [arcmin] (formal 1-sigma fit error)
    SNR: 11.4408310481278
    RA  =  23h  1m 51.3s  (345.463611 deg.)
    Dec =  38d 39' 33" (38.659271 deg.)
 
  Angular difference between Flight and Ground position is 1.362633 arcmin
 
  Partial Coding Fraction: 0.8984375    [ including projection effects ]

  Duration
     T90: 14.2080000042915 +/- 3.7781688614362
        Measured from: -6.783999979496
                   to: 7.42400002479553     [s; relative to TRIGTIME]
     T50: 6.0160000026226 +/- 2.16562230363598
        Measured from: -1.72799998521805
                   to: 4.28800001740456     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0439999997615814     
                   to: 1.04399999976158     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.57599997520447     
                   to: 8.70400002598763     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.169782   0.203816   0.085184   0.026615
           0.021664   0.022133   0.019660   0.018794 [error]
 Peak      0.026326   0.016232   0.018462   0.002879
           0.005264   0.005417   0.004749   0.004620 [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 5.51e-08 7.63e-08 7.80e-08 1.45e-07 2.56e-07 3.54e-07   erg/cm2
              Error 9.72e-09 9.96e-09 1.80e-08 6.58e-08 4.14e-08 8.62e-08   erg/cm2
Peak flux Power-law 2.43e-01 1.83e-01 9.19e-02 6.62e-02 5.48e-01 5.83e-01   ph/cm2/s
              Error 8.07e-02 4.43e-02 4.14e-02 5.80e-02 1.30e-01 1.44e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.09e-08 8.67e-08 7.24e-08 2.78e-08 2.30e-07 2.36e-07   erg/cm2
              Error 1.10e-08 1.44e-08 2.26e-08 6.61e-08 4.48e-08 5.31e-08   erg/cm2
Peak flux Cutoff-PL 2.41e-01 1.84e-01 9.25e-02 6.26e-02 5.47e-01 5.76e-01   ph/cm2/s
              Error 8.91e-02 5.08e-02 4.16e-02 6.93e-02 1.29e-01 1.51e-01   ph/cm2/s
 
Fluence        Band 5.04e-08 8.64e-08 7.23e-08 2.77e-08 2.30e-07 2.41e-07   erg/cm2
              Error 1.09e-08 1.43e-08 2.26e-08 7.62e-08 4.47e-08 0.00e+00   erg/cm2
Peak flux      Band 2.42e-01 1.83e-01 9.19e-02 6.57e-02 5.48e-01 5.83e-01   ph/cm2/s
              Error 8.40e-02 5.08e-02 4.16e-02 5.76e-02 1.30e-01 1.44e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.968    0.244    -      -           1.61e-03 2.70e-04   63.512 57
CPL   0.880    1.219      41.7   29.1      7.02e-03 2.45e-02   60.288 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.991    0.512    -      -           3.67e-03 1.24e-03   63.008 57
CPL   1.956    0.991      53.6 4993.2      3.84e-03 1.73e-02   63.010  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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   17.280   -8.576    8.704
T90    14.208   -6.784    7.424
T50     6.016   -1.728    4.288
Peak    1.000    0.044    1.044

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  345.4636 +38.6593 0.0167   11.9   98.6       0.4939    11.4  TRIG_00163170       
------------------------------------------
 
Foreground time interval of the image:
 -8.576   8.704 (delta_t =  17.280 [sec])
Background time interval of the image:
-299.200  -8.576 (delta_t = 290.624 [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   -8.576 sec. to    8.704 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.96775     ( -0.235466   0.253153 )
Norm@50keV  : 1.609099E-03    ( -2.744291E-04   2.659017E-04) )
------------------------------------------------------------
 Chi-Squared =      63.51211     using    59 PHA bins.
 Reduced chi-squared =      1.114248     for     57 degrees of freedom
 Null hypothesis probability = 0.258
 
Photon flux (15-150 keV)    in 17.28 sec: 0.237740 ( -0.030503  0.030503 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.55849e-07 ( -4.06771e-08  4.21563e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -8.576 sec. to    8.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.879549     ( -1.40291   1.03440 )
Epeak [keV] : 41.7008      ( -19.1554 39.0723 )
Norm@50keV  : 7.019644E-03    ( -7.019644E-03   4.192271E-02) )
------------------------------------------------------------
 Chi-Squared =      60.28818     using    59 PHA bins.
 Reduced chi-squared =      1.076575     for     56 degrees of freedom
 Null hypothesis probability = 0.323
 
Photon flux (15-150 keV)    in 17.28 sec: 0.229491 ( -0.015843  0.031365 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30282e-07 ( -4.21805e-08  4.73368e-08 ) ergs/cm2
 
Band function
Time interval is from   -8.576 sec. to    8.704 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.05547   ( -0.876532   1.51525 )
beta        : -9.26177    ( -0.738225   7.31590 )
Epeak [keV] : 42.0859      ( -10.5715 42.8656 )
Norm@50keV   : 5.555115E-03    ( -5.555115E-03   2.518903E-02) )
------------------------------------------------------------
 Chi-Squared =      60.35220     using    59 PHA bins.
 Reduced chi-squared =      1.097313     for     55 degrees of freedom
 Null hypothesis probability = 0.289
 
Photon flux (15-150 keV)    in 17.28 sec: 0.229483 ( -0.031244  0.031375 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30005e-07 ( -4.20751e-08  4.72954e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.064 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99147     ( -0.463499   0.559562 )
Norm@50keV  : 3.667792E-03    ( -1.291413E-03   1.186478E-03) )
------------------------------------------------------------
 Chi-Squared =      63.00813     using    59 PHA bins.
 Reduced chi-squared =      1.105406     for     57 degrees of freedom
 Null hypothesis probability = 0.272
 
Photon flux (15-150 keV)    in 0.9600 sec: 0.548021 ( -0.129537  0.129579 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.24336e-08 ( -9.98755e-09  1.06492e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.064 sec. to    1.024 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.95562     ( -1.76392   0.218971 )
Epeak [keV] : 53.6117      ( -40.1041 9946.39 )
Norm@50keV  : 3.842088E-03    ( -3.842088E-03   3.077443E-02) )
------------------------------------------------------------
 Chi-Squared =      63.01007     using    59 PHA bins.
 but latest trial   2.17408     gives Chi-Squared =  0.103367
 but latest trial   13.5076     gives Chi-Squared =  5.493164E-04
 Reduced chi-squared =      1.125180     for     56 degrees of freedom
 Null hypothesis probability = 0.242
 
Photon flux (15-150 keV)    in 0.9600 sec: 0.547291 ( -0.129469  0.129153 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.25471e-08 ( -1.01004e-08  1.05418e-08 ) ergs/cm2
 
Band function
Time interval is from    0.064 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.84421   ( -4.59770   7.21187 )
beta        : -8.17622    ( -0.559690   0.463800 )
Epeak [keV] : 51.2424      ( -51.1424 9948.76 )
Norm@50keV   : 4.372187E-03    ( -0.175523   0.161269 )
------------------------------------------------------------
 Chi-Squared =      63.03510     using    59 PHA bins.
 Reduced chi-squared =      1.146093     for     55 degrees of freedom
 Null hypothesis probability = 0.213
 
Photon flux (15-150 keV)    in 0.9600 sec: 0.547852 ( -0.12951  0.129539 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.24217e-08 ( -1.03911e-08  1.06199e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 18:13:10 EST 2008