batgrbproduct Analysis for Trigger=173321

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 20:11:31 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger173321/GCN5_download_cron
======================================================================

  Trigger: 00173321      Segment: 000

  BAT Trigger Time: 156625608   [s; MET]
      Trigger Stop: 156625672   [s; MET]
               UTC: 2005-12-18T19:06:48.096320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 246.657378485672   Dec: -51.93739381185  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    33590
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    33590

  Flight Position:   [ source = BAT ]
    RA: 246.657378485672   Dec: -51.93739381185  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 246.62903314658   Dec: -51.9396614157793  [deg; J2000]  
        { 16h 26m 31.0s , -51d 56' 22.8" }
         +/- 2.59604462428728 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.79288806650324 [arcmin] (formal 1-sigma fit error)
    SNR: 7.78473574827235
    RA  =  16h 26m 31.0s  (246.629033 deg.)
    Dec = -51d 56' 23" (-51.939661 deg.)
 
  Angular difference between Flight and Ground position is 1.057296 arcmin
 
  Partial Coding Fraction: 0.296875    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.560398   0.348418  -0.004888   0.099612
           0.079445   0.073687   0.063875   0.056128 [error]
 Peak      0.560398   0.348418  -0.004888   0.099612
           0.079445   0.073687   0.063875   0.056128 [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 2.21e-07 1.39e-07 5.58e-08 3.04e-08 4.31e-07 4.46e-07   erg/cm2
              Error 4.89e-08 4.40e-08 3.74e-08 4.23e-08 1.10e-07 1.26e-07   erg/cm2
Peak flux Power-law 1.16e-01 4.10e-02 8.26e-03 1.97e-03 1.66e-01 1.67e-01   ph/cm2/s
              Error 2.62e-02 1.24e-02 5.36e-03 2.59e-03 3.41e-02 3.43e-02   ph/cm2/s
 
Fluence   Cutoff-PL 2.22e-07 1.49e-07 2.51e-08 6.69e-10 3.97e-07 3.97e-07   erg/cm2
              Error 5.18e-08 5.40e-08 4.29e-08 3.20e-08 1.03e-07 1.17e-07   erg/cm2
Peak flux Cutoff-PL 1.16e-01 4.10e-02 8.25e-03 1.95e-03 1.66e-01 1.67e-01   ph/cm2/s
              Error 2.61e-02 1.24e-02 5.36e-03 2.57e-03 3.40e-02 3.43e-02   ph/cm2/s
 
Fluence        Band 2.19e-07 1.38e-07 5.60e-08 3.12e-08 4.37e-07 4.45e-07   erg/cm2
              Error 4.46e-08 3.24e-08 4.08e-08 9.76e-08 1.13e-07 0.00e+00   erg/cm2
Peak flux      Band 1.14e-01 4.22e-02 8.75e-03 2.12e-03 1.68e-01 1.74e-01   ph/cm2/s
              Error 2.32e-02 1.34e-02 4.38e-03 1.31e-03 3.46e-02 3.47e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.312    0.590    -      -           4.78e-04 2.43e-04   53.801 57
CPL   1.379    3.821       9.0   11.0      1.17e-02 5.47e+00   52.459  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.312    0.590    -      -           4.78e-04 2.43e-04   53.801 57
CPL   1.379    3.371       9.0   11.0      1.17e-02 5.47e+00   52.459  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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  246.6290 -51.9397 0.0247   41.3  -45.4       1.1686     7.8  TRIG_00173321       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.31153     ( -0.525262   0.654711 )
Norm@50keV  : 4.781588E-04    ( -2.241413E-04   2.611908E-04) )
------------------------------------------------------------
 Chi-Squared =      53.80140     using    59 PHA bins.
 Reduced chi-squared =     0.9438841     for     57 degrees of freedom
 Null hypothesis probability = 0.596
 
Photon flux (15-150 keV)    in 64.00 sec: 0.166445 ( -0.034033  0.034075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.31256e-07 ( -1.05422e-07  1.13886e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37910     ( -4.23050   3.41136 )
Epeak [keV] : 9.03184      ( -9.02184 12.8958 )
Norm@50keV  : 1.166872E-02    ( -1.166872E-02   10.9364 )
------------------------------------------------------------
 Chi-Squared =      52.45891     using    59 PHA bins.
 but latest trial  -6.20593     gives Chi-Squared =   2.52340
 but latest trial   21.9276     gives Chi-Squared =   4.19870
 Reduced chi-squared =     0.9367662     for     56 degrees of freedom
 Null hypothesis probability = 0.610
 
Photon flux (15-150 keV)    in 64.00 sec: 0.166373 ( -0.034021  0.03406 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.97195e-07 ( -9.17018e-08  1.14938e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.43488   ( -8.56512   0.920099 )
beta        : -9.11101    ( -0.888988   6.12801 )
Epeak [keV] : 10.3756      ( -10.2756 13.0821 )
Norm@50keV   : 7.877296E-03    ( -1.592774E-03   992612. )
------------------------------------------------------------
 Chi-Squared =      53.06627     using    59 PHA bins.
 Reduced chi-squared =     0.9648412     for     55 degrees of freedom
 Null hypothesis probability = 0.549
 
Photon flux (15-150 keV)    in 64.00 sec: 0.168261 ( -0.034706  0.034449 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.36605e-07 ( -1.03324e-07  9.1975e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.31153     ( -0.525262   0.654711 )
Norm@50keV  : 4.781588E-04    ( -2.241413E-04   2.611908E-04) )
------------------------------------------------------------
 Chi-Squared =      53.80140     using    59 PHA bins.
 Reduced chi-squared =     0.9438841     for     57 degrees of freedom
 Null hypothesis probability = 0.596
 
Photon flux (15-150 keV)    in 64.00 sec: 0.166445 ( -0.034033  0.034075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.31256e-07 ( -1.05422e-07  1.13886e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37910     ( -4.23050   2.51183 )
Epeak [keV] : 9.03184      ( -9.02184 12.8958 )
Norm@50keV  : 1.166872E-02    ( -1.166872E-02   10.9364 )
------------------------------------------------------------
 Chi-Squared =      52.45891     using    59 PHA bins.
 but latest trial  -6.20593     gives Chi-Squared =   2.52340
 but latest trial   21.9276     gives Chi-Squared =   4.19870
 Reduced chi-squared =     0.9367662     for     56 degrees of freedom
 Null hypothesis probability = 0.610
 
Photon flux (15-150 keV)    in 64.00 sec: 0.166373 ( -0.034021  0.03406 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.97195e-07 ( -9.17018e-08  1.14938e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.43488   ( -8.56512   0.920099 )
beta        : -9.11101    ( -0.888988   9.08948 )
Epeak [keV] : 10.3756      ( -10.2756 13.0821 )
Norm@50keV   : 7.877296E-03    ( -1.592774E-03   992612. )
------------------------------------------------------------
 Chi-Squared =      53.06627     using    59 PHA bins.
 Reduced chi-squared =     0.9648412     for     55 degrees of freedom
 Null hypothesis probability = 0.549
 
Photon flux (15-150 keV)    in 64.00 sec: 0.168261 ( -0.034706  0.034449 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.36605e-07 ( -1.03324e-07  9.1975e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 20:18:44 EST 2008