batgrbproduct Analysis for Trigger=218582

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jan  1 20:05:20 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger218582/GCN5_download_cron
======================================================================

  Trigger: 00218582      Segment: 000

  BAT Trigger Time: 174431265.024   [s; MET]
      Trigger Stop: 174431291.904   [s; MET]
               UTC: 2006-07-12T21:07:43.711080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 184.061047100022   Dec: 35.5596913631098  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.67
     Image Trigger?:     NO
     Rate S/N Ratio:     10.3923048454133  [ if not an image trigger ]
     Image S/N Ratio:    6.67

  Flight Position:   [ source = BAT ]
    RA: 184.061047100022   Dec: 35.5596913631098  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 184.068729754653   Dec: 35.5425704645346  [deg; J2000]  
        { 12h 16m 16.5s , +35d 32' 33.3" }
         +/- 2.2692081683826 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.29924677710124 [arcmin] (formal 1-sigma fit error)
    SNR: 9.43466465531147
    RA  =  12h 16m 16.5s  (184.068730 deg.)
    Dec =  35d 32' 33" (35.542570 deg.)
 
  Angular difference between Flight and Ground position is 1.093573 arcmin
 
  Partial Coding Fraction: 0.09570312    [ including projection effects ]

  Duration
     T90: 26.5919999778271 +/- 4.75956301217577
        Measured from: 2.04800000786781
                   to: 28.6399999856949     [s; relative to TRIGTIME]
     T50: 13.0719999670982 +/- 7.41044020466044
        Measured from: 11.2000000178814
                   to: 24.2719999849796     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 16.772000014782     
                   to: 17.772000014782     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.608000010251999     
                   to: 30.2240000069141     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.567508   0.619926   0.437972   0.214706
           0.101297   0.103497   0.090750   0.076641 [error]
 Peak      0.071752   0.053145   0.059122   0.021843
           0.018925   0.018990   0.017156   0.014575 [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 1.96e-07 3.27e-07 4.16e-07 1.06e-06 1.23e-06 1.99e-06   erg/cm2
              Error 6.46e-08 6.24e-08 9.12e-08 5.33e-07 2.18e-07 5.82e-07   erg/cm2
Peak flux Power-law 8.53e-01 5.45e-01 2.25e-01 1.26e-01 1.69e+00 1.75e+00   ph/cm2/s
              Error 4.09e-01 1.83e-01 1.13e-01 1.17e-01 5.91e-01 5.97e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.96e-07 3.28e-07 4.16e-07 1.05e-06 1.23e-06 1.97e-06   erg/cm2
              Error 6.46e-08 6.25e-08 9.13e-08 5.29e-07 2.18e-07 5.79e-07   erg/cm2
Peak flux Cutoff-PL 6.73e-01 6.17e-01 2.68e-01 5.82e-02 1.60e+00 1.62e+00   ph/cm2/s
              Error 6.15e-01 2.36e-01 2.24e-01 1.24e-01 6.30e-01 6.53e-01   ph/cm2/s
 
Fluence        Band 1.91e-07 3.25e-07 4.17e-07 1.07e-06 1.23e-06 2.04e-06   erg/cm2
              Error 4.54e-08 5.75e-08 7.87e-08 2.58e-07 2.13e-07 0.00e+00   erg/cm2
Peak flux      Band 6.73e-01 6.16e-01 2.68e-01 5.86e-02 1.60e+00 1.62e+00   ph/cm2/s
              Error 6.15e-01 2.36e-01 2.18e-01 1.24e-01 7.67e-01 6.49e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.655    0.332    -      -           4.47e-03 7.63e-04   54.861 57
CPL   1.654    0.334    9992.8 5000.0      4.48e-03 7.66e-04   54.872 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.278    0.623    -      -           9.77e-03 3.95e-03   64.186 57
CPL   1.018    2.540      41.1 5000.0      4.13e-02 1.29e+00   63.551  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   29.616    0.608   30.224
T90    26.592    2.048   28.640
T50    13.072   11.200   24.272
Peak    1.000   16.772   17.772

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  184.0687 +35.5426 0.0205   55.6   -5.0       1.9916     9.4  TRIG_00218582       
------------------------------------------
 
Foreground time interval of the image:
  0.608  30.224 (delta_t =  29.616 [sec])
Background time interval of the image:
-239.024   0.608 (delta_t = 239.632 [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    0.608 sec. to   30.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65501     ( -0.331545   0.333075 )
Norm@50keV  : 4.473621E-03    ( -7.651739E-04   7.611150E-04) )
------------------------------------------------------------
 Chi-Squared =      54.86083     using    59 PHA bins.
 Reduced chi-squared =     0.9624708     for     57 degrees of freedom
 Null hypothesis probability = 0.556
 
Photon flux (15-150 keV)    in 29.62 sec: 0.585114 ( -0.110682  0.111444 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2318e-06 ( -2.18003e-07  2.18761e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.608 sec. to   30.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65376     ( -0.333426   0.334968 )
Epeak [keV] : 9992.83      ( -9992.82 7.17285 )
Norm@50keV  : 4.482922E-03    ( -7.690578E-04   7.635914E-04) )
------------------------------------------------------------
 Chi-Squared =      54.87207     using    59 PHA bins.
 Reduced chi-squared =     0.9798585     for     56 degrees of freedom
 Null hypothesis probability = 0.518
 
Photon flux (15-150 keV)    in 29.62 sec: 0.584863 ( -0.110643  0.111402 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23173e-06 ( -2.18012e-07  2.18963e-07 ) ergs/cm2
 
Band function
Time interval is from    0.608 sec. to   30.224 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.33900   ( -8.66100   6.33900 )
beta        : -1.65501    ( -8.34499   0.331550 )
Epeak [keV] : 20.3284      ( -20.2284 9979.67 )
Norm@50keV   : 1.029595E-02    ( -1.029595E-02   183.847 )
------------------------------------------------------------
 Chi-Squared =      54.86084     using    59 PHA bins.
 Reduced chi-squared =     0.9974697     for     55 degrees of freedom
 Null hypothesis probability = 0.480
 
Photon flux (15-150 keV)    in 29.62 sec: 0.577367 ( -0.097405  0.10064 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23284e-06 ( -2.08394e-07  2.16697e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   16.768 sec. to   17.776 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.27803     ( -0.537516   0.708299 )
Norm@50keV  : 9.767472E-03    ( -4.140034E-03   3.765629E-03) )
------------------------------------------------------------
 Chi-Squared =      64.18594     using    59 PHA bins.
 Reduced chi-squared =      1.126069     for     57 degrees of freedom
 Null hypothesis probability = 0.239
 
Photon flux (15-150 keV)    in 1.008 sec: 1.68631 ( -0.58866  0.59358 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.36778e-08 ( -3.29407e-08  3.32627e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   16.768 sec. to   17.776 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01800     ( -4.01800   1.06253 )
Epeak [keV] : 41.0520      ( -41.0420 9958.95 )
Norm@50keV  : 4.127755E-02    ( -3.735480E-02   2.53295 )
------------------------------------------------------------
 Chi-Squared =      63.55080     using    59 PHA bins.
 but latest trial   2.07250     gives Chi-Squared =   1.01462
 but latest trial  2.983991E-03 gives Chi-Squared =   6.54333
 Reduced chi-squared =      1.134836     for     56 degrees of freedom
 Null hypothesis probability = 0.228
 
Photon flux (15-150 keV)    in 1.008 sec: 1.60336 ( -0.638635  0.62156 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.36892e-08 ( -3.24655e-08  3.32644e-08 ) ergs/cm2
 
Band function
Time interval is from   16.768 sec. to   17.776 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.00750   ( -8.99250   2.87801 )
beta        : -9.31839    ( -0.681609   7.51014 )
Epeak [keV] : 41.2522      ( -41.1522 9958.75 )
Norm@50keV   : 4.162731E-02    ( -3.374295E-02   9.09877 )
------------------------------------------------------------
 Chi-Squared =      63.55103     using    59 PHA bins.
 Reduced chi-squared =      1.155473     for     55 degrees of freedom
 Null hypothesis probability = 0.201
 
Photon flux (15-150 keV)    in 1.008 sec: 1.60455 ( -0.912067  0.6223 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.37541e-08 ( -3.27934e-08  3.31088e-08 ) ergs/cm2
 
Plot creation:
Tue Jan  1 20:29:38 EST 2008