batgrbproduct Analysis for Trigger=240801

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 13:54:37 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger240801/GCN5_download_cron
======================================================================

  Trigger: 00240801      Segment: 000

  BAT Trigger Time: 186239768.944   [s; MET]
      Trigger Stop: 186239769.296   [s; MET]
               UTC: 2006-11-26T13:16:07.348460    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 16 ms to TRIGTIME + 320 ms

  BAT 
    RA: 286.816471920316   Dec: 9.31861256148646  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.49
     Image Trigger?:     NO
     Rate S/N Ratio:     64.1872261435249  [ if not an image trigger ]
     Image S/N Ratio:    14.49

  Flight Position:   [ source = BAT ]
    RA: 286.816471920316   Dec: 9.31861256148646  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 286.812410377038   Dec: 9.33661461132041  [deg; J2000]  
        { 19h 07m 15.0s , +09d 20' 11.8" }
         +/- 1.52928620193158 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.680675402060097 [arcmin] (formal 1-sigma fit error)
    SNR: 16.5791779929542
    RA  =  19h  7m 15.0s  (286.812410 deg.)
    Dec =   9d 20' 12" (9.336615 deg.)
 
  Angular difference between Flight and Ground position is 1.106568 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: 0.0200000107288361 +/- 0.0126491080018669
        Measured from: 0.296000003814697
                   to: 0.316000014543533     [s; relative to TRIGTIME]
     T50: 0.00400000810623169 +/- 0.00565684464005017
        Measured from: 0.299999982118607
                   to: 0.303999990224838     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.187999993562698     
                   to: 0.812000006437302     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.296000003814697     
                   to: 0.324000000953674     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.028145   0.017861   0.007241   0.000695
           0.002409   0.002069   0.001442   0.000701 [error]
 Peak      0.028350   0.018178   0.007238   0.000652
           0.002456   0.002096   0.001471   0.000704 [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 8.58e-09 5.62e-09 2.39e-09 1.40e-09 1.73e-08 1.80e-08   erg/cm2
              Error 1.20e-09 7.95e-10 5.72e-10 5.62e-10 2.27e-09 2.45e-09   erg/cm2
Peak flux Power-law 8.98e+00 3.34e+00 7.17e-01 1.84e-01 1.32e+01 1.32e+01   ph/cm2/s
              Error 1.28e+00 4.61e-01 1.65e-01 6.87e-02 1.70e+00 1.70e+00   ph/cm2/s
 
Fluence   Cutoff-PL 7.94e-09 8.05e-09 2.57e-09 1.83e-10 1.87e-08 1.84e-08   erg/cm2
              Error 1.33e-09 1.26e-09 9.85e-10 2.49e-10 2.38e-09 0.00e+00   erg/cm2
Peak flux Cutoff-PL 8.10e+00 4.78e+00 8.15e-01 3.03e-02 1.37e+01 1.37e+01   ph/cm2/s
              Error 1.42e+00 7.21e-01 2.92e-01 3.93e-02 1.73e+00 1.73e+00   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   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      Band 8.13e+00 4.75e+00 8.28e-01 3.36e-02 1.37e+01 1.37e+01   ph/cm2/s
              Error 1.42e+00 6.66e-01 2.25e-01 3.48e-02 1.72e+00 1.73e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.229    0.207    -      -           4.59e-02 8.73e-03   69.166 57
CPL   1.041    1.051      17.8   12.7      9.87e-01 3.17e+00   49.493 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.222    0.204    -      -           4.05e-02 7.65e-03   72.868 57
CPL   0.973    1.058      18.6   11.1      9.47e-01 3.07e+00   52.170 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.028    0.296    0.324
T90     0.020    0.296    0.316
T50     0.004    0.300    0.304
Peak    1.000   -0.188    0.812

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  286.8124  +9.3366 0.0116   17.7  -69.3       0.0556    16.6  TRIG_00240801       
------------------------------------------
 
Foreground time interval of the image:
  0.280   0.308 (delta_t =   0.028 [sec])
Background time interval of the image:
-238.960 -111.670 (delta_t = 127.290 [sec])
-110.960   0.280 (delta_t = 111.240 [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    0.280 sec. to    0.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.22947     ( -0.193676   0.220492 )
Norm@50keV  : 4.585912E-02    ( -8.793082E-03   8.669559E-03) )
------------------------------------------------------------
 Chi-Squared =      69.16602     using    59 PHA bins.
 Reduced chi-squared =      1.213439     for     57 degrees of freedom
 Null hypothesis probability = 0.130
 
Photon flux (15-150 keV)    in 2.8000E-02 sec: 14.9737 ( -1.9222  1.9244 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.73002e-08 ( -2.27265e-09  2.27251e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.280 sec. to    0.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04072     ( -1.20334   0.899400 )
Epeak [keV] : 17.8228      ( -17.8128 7.63031 )
Norm@50keV  : 0.986976    ( -0.986976   5.36220 )
------------------------------------------------------------
 Chi-Squared =      49.49255     using    59 PHA bins.
 Reduced chi-squared =     0.8837956     for     56 degrees of freedom
 Null hypothesis probability = 0.718
 
Photon flux (15-150 keV)    in 2.8000E-02 sec: 15.5592 ( -1.9518  1.951 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.87305e-08 ( -2.38048e-09  2.37611e-09 ) ergs/cm2
 
Band function
Time interval is from    0.280 sec. to    0.308 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.51168   ( -0.480310   0.410877 )
beta        : -9.36460    (     )
Epeak [keV] : 13.3490      (   )
Norm@50keV   : 0.439582    (     )
------------------------------------------------------------
 Chi-Squared =      51.51043     using    59 PHA bins.
 Reduced chi-squared =     0.9365532     for     55 degrees of freedom
 Null hypothesis probability = 0.609
 
Photon flux (15-150 keV)    in 2.8000E-02 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.280 sec. to    0.312 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.22218     ( -0.191401   0.217324 )
Norm@50keV  : 4.052510E-02    ( -7.698651E-03   7.592473E-03) )
------------------------------------------------------------
 Chi-Squared =      72.86820     using    59 PHA bins.
 Reduced chi-squared =      1.278389     for     57 degrees of freedom
 Null hypothesis probability = 7.661E-02
 
Photon flux (15-150 keV)    in 3.2000E-02 sec: 13.1587 ( -1.6979  1.6984 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.74026e-08 ( -2.28883e-09  2.29373e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.280 sec. to    0.312 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.972928     ( -1.20955   0.905542 )
Epeak [keV] : 18.6099      ( -14.8800 7.31803 )
Norm@50keV  : 0.947490    ( -0.947490   5.18595 )
------------------------------------------------------------
 Chi-Squared =      52.17035     using    59 PHA bins.
 Reduced chi-squared =     0.9316134     for     56 degrees of freedom
 Null hypothesis probability = 0.621
 
Photon flux (15-150 keV)    in 3.2000E-02 sec: 13.7248 ( -1.7262  1.726 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89499e-08 ( -2.40608e-09  2.40397e-09 ) ergs/cm2
 
Band function
Time interval is from    0.280 sec. to    0.312 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.66258   ( -7.066965E-02   0.110435 )
beta        : -9.25850    ( -0.741502   19.2585 )
Epeak [keV] : 8.89497      ( -4.64625 3.24373 )
Norm@50keV   : 0.369783    ( -0.242430   5.51176 )
------------------------------------------------------------
 Chi-Squared =      53.68254     using    59 PHA bins.
 Reduced chi-squared =     0.9760463     for     55 degrees of freedom
 Null hypothesis probability = 0.525
 
Photon flux (15-150 keV)    in 3.2000E-02 sec: 13.7403 ( -1.7337  1.7111 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89244e-08 ( -2.28602e-09  2.33875e-09 ) ergs/cm2
 
Plot creation:
Wed Jan  2 14:28:34 EST 2008