batgrbproduct Analysis for Trigger=172516

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 19:38:26 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger172516/GCN5_download_hand
======================================================================

  Trigger: 00172516      Segment: 000

  BAT Trigger Time: 156150784   [s; MET]
      Trigger Stop: 156150848   [s; MET]
               UTC: 2005-12-13T07:13:04.106720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 252.122941460355   Dec: -59.2071286962437  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.98
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.98

  Flight Position:   [ source = BAT ]
    RA: 252.122941460355   Dec: -59.2071286962437  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 252.092441595541   Dec: -59.2280556693885  [deg; J2000]  
        { 16h 48m 22.2s , -59d 13' 41.0" }
         +/- 1.83844552445614 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.717315065428104 [arcmin] (formal 1-sigma fit error)
    SNR: 12.7447573677545
    RA  =  16h 48m 22.2s  (252.092442 deg.)
    Dec = -59d 13' 41" (-59.228056 deg.)
 
  Angular difference between Flight and Ground position is 1.566431 arcmin
 
  Partial Coding Fraction: 0.6796875    [ including projection effects ]

  Duration
     T90: 71.0480000078678 +/- 4.98602527147389
        Measured from: -8.43599998950958
                   to: 62.6120000183582     [s; relative to TRIGTIME]
     T50: 53.3000000119209 +/- 4.99063000895054
        Measured from: -1.67199999094009
                   to: 51.6280000209808     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 48.8840000033379     
                   to: 49.8840000033379     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -10.7240000069141     
                   to: 66.7159999907017     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.340683   0.571601   0.312484   0.051225
           0.053765   0.052460   0.044977   0.037005 [error]
 Peak      0.004951   0.027517   0.019905   0.009771
           0.006100   0.006065   0.005231   0.004334 [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 1.21e-07 2.05e-07 2.66e-07 6.94e-07 7.82e-07 1.29e-06   erg/cm2
              Error 2.23e-08 2.43e-08 4.30e-08 2.33e-07 1.03e-07 2.71e-07   erg/cm2
Peak flux Power-law 1.06e-01 1.45e-01 1.45e-01 2.63e-01 4.80e-01 6.58e-01   ph/cm2/s
              Error 6.45e-02 5.40e-02 4.00e-02 1.66e-01 1.40e-01 1.85e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.09e-07 2.27e-07 2.70e-07 2.08e-07 7.28e-07 8.10e-07   erg/cm2
              Error 2.54e-08 3.35e-08 5.02e-08 2.77e-07 1.17e-07 2.10e-07   erg/cm2
Peak flux Cutoff-PL 9.66e-02 1.47e-01 1.51e-01 1.89e-01 4.74e-01 5.84e-01   ph/cm2/s
              Error 7.51e-02 5.89e-02 5.15e-02 2.14e-01 1.43e-01 2.46e-01   ph/cm2/s
 
Fluence        Band 1.08e-07 2.31e-07 2.56e-07 4.77e-07 7.49e-07 1.04e-06   erg/cm2
              Error 2.54e-08 3.42e-08 4.46e-08 3.97e-07 1.13e-07 4.18e-07   erg/cm2
Peak flux      Band 6.90e-02 1.61e-01 1.49e-01 2.23e-01 4.57e-01 6.04e-01   ph/cm2/s
              Error 7.83e-02 4.51e-02 4.49e-02 1.95e-01 1.50e-01 2.07e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.628    0.199    -      -           1.08e-03 1.34e-04   53.425 57
CPL   0.773    0.936      65.5  249.8      3.16e-03 5.75e-03   50.460  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.994    0.507    -      -           4.17e-03 1.19e-03   51.445 57
CPL   0.561    3.454     193.5 5000.0      6.47e-03 5.24e-02   51.370 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   77.440  -10.724   66.716
T90    71.048   -8.436   62.612
T50    53.300   -1.672   51.628
Peak    1.000   48.884   49.884

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  252.0924 -59.2281 0.0151   21.6  -85.3       1.1695    12.7  TRIG_00172516       
------------------------------------------
 
Foreground time interval of the image:
 -6.799  66.716 (delta_t =  73.515 [sec])
Background time interval of the image:

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  -10.724 sec. to   66.716 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62847     ( -0.197715   0.200770 )
Norm@50keV  : 1.083292E-03    ( -1.344523E-04   1.331028E-04) )
------------------------------------------------------------
 Chi-Squared =      53.42503     using    59 PHA bins.
 Reduced chi-squared =     0.9372811     for     57 degrees of freedom
 Null hypothesis probability = 0.610
 
Photon flux (15-150 keV)    in 77.44 sec: 0.140462 ( -0.016578  0.0166 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.82051e-07 ( -1.02773e-07  1.04048e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -10.724 sec. to   66.716 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.772773     ( -1.02922   0.842119 )
Epeak [keV] : 65.4646      ( -16.5871 482.967 )
Norm@50keV  : 3.162719E-03    ( -3.162719E-03   8.339128E-03) )
------------------------------------------------------------
 Chi-Squared =      50.45972     using    59 PHA bins.
 but latest trial   1.61126     gives Chi-Squared =   2.64136
 Reduced chi-squared =     0.9010664     for     56 degrees of freedom
 Null hypothesis probability = 0.684
 
Photon flux (15-150 keV)    in 77.44 sec: 0.136489 ( -0.017118  0.017095 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.27543e-07 ( -1.16067e-07  1.17986e-07 ) ergs/cm2
 
Band function
Time interval is from  -10.724 sec. to   66.716 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.857800   ( -1.53415   4.32365 )
beta        : -2.21550    ( -2.12583   0.384119 )
Epeak [keV] : 65.3026      ( -15.0370 47.6682 )
Norm@50keV   : 2.907465E-03    ( -0.347281   18.1223 )
------------------------------------------------------------
 Chi-Squared =      50.37790     using    59 PHA bins.
 Reduced chi-squared =     0.9159617     for     55 degrees of freedom
 Null hypothesis probability = 0.652
 
Photon flux (15-150 keV)    in 77.44 sec: 0.137227 ( -0.016285  0.017167 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.49024e-07 ( -1.12562e-07  1.13835e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   48.884 sec. to   49.884 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.994421     ( -0.541910   0.472928 )
Norm@50keV  : 4.170548E-03    ( -1.213345E-03   1.164865E-03) )
------------------------------------------------------------
 Chi-Squared =      51.44536     using    59 PHA bins.
 Reduced chi-squared =     0.9025502     for     57 degrees of freedom
 Null hypothesis probability = 0.683
 
Photon flux (15-150 keV)    in 1.000 sec: 0.480240 ( -0.138791  0.14057 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.52276e-08 ( -1.24895e-08  1.24865e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   48.884 sec. to   49.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.561333     ( -2.93935   3.96955 )
Epeak [keV] : 193.541      ( -193.531 9806.46 )
Norm@50keV  : 6.468295E-03    ( -6.468295E-03   9.834018E-02) )
------------------------------------------------------------
 Chi-Squared =      51.37047     using    59 PHA bins.
 Reduced chi-squared =     0.9173298     for     56 degrees of freedom
 Null hypothesis probability = 0.650
 
Photon flux (15-150 keV)    in 1.000 sec: 0.474382 ( -0.142614  0.143983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.46454e-08 ( -1.36558e-08  1.28962e-08 ) ergs/cm2
 
Band function
Time interval is from   48.884 sec. to   49.884 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.193543   ( -14.6293   0.370691 )
beta        : -1.11292    ( -1.12416   0.684673 )
Epeak [keV] : 96.4433      ( -41.8056 9958.09 )
Norm@50keV   : 1.106709E-02    ( -9.69528   662811. )
------------------------------------------------------------
 Chi-Squared =      51.21140     using    59 PHA bins.
 Reduced chi-squared =     0.9311163     for     55 degrees of freedom
 Null hypothesis probability = 0.620
 
Photon flux (15-150 keV)    in 1.000 sec: 0.456924 ( -0.14176  0.157323 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.46328e-08 ( -1.36569e-08  1.28854e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 19:48:19 EST 2008