batgrbproduct Analysis for Trigger=335895

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Fri Nov 28 22:15:30 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger335895/GCN5_download_cron
======================================================================

  Trigger: 00335895      Segment: 000

  BAT Trigger Time: 249585528   [s; MET]
      Trigger Stop: 249585616   [s; MET]
               UTC: 2008-11-28T17:18:44.708060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 20.7981962498564   Dec: 38.1151246414524  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    20.22
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    20.22

  Flight Position:   [ source = BAT ]
    RA: 20.7981962498564   Dec: 38.1151246414524  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 20.8007131444641   Dec: 38.1240060615556  [deg; J2000]  
        { 01h 23m 12.2s , +38d 07' 26.4" }
         +/- 0.96017626305813 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.320255230630215 [arcmin] (formal 1-sigma fit error)
    SNR: 32.2352681005274
 
  Angular difference between Flight and Ground position is 0.545968 arcmin
 
  Partial Coding Fraction: 0.7421875    [ including projection effects ]

  Duration
     T90: 101.752000033855 +/- 10.8145383620074
        Measured from: -48.3159999251366
                   to: 53.4360001087189     [s; relative to TRIGTIME]
     T50: 31.8560000061989 +/- 4.96311192854815
        Measured from: 4.0840000808239
                   to: 35.9400000870228     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 17.5959999859333     
                   to: 18.5959999859333     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -69.2120000123978     
                   to: 62.6599999964237     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.497667   1.817794   0.916799   0.161912
           0.067147   0.068101   0.059765   0.053019 [error]
 Peak      0.042001   0.054731   0.042192   0.013086
           0.006643   0.006934   0.006039   0.004953 [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 5.35e-07 7.37e-07 7.48e-07 1.38e-06 2.46e-06 3.42e-06   erg/cm2
              Error 4.05e-08 3.57e-08 5.78e-08 2.17e-07 1.34e-07 2.74e-07   erg/cm2
Peak flux Power-law 4.34e-01 4.23e-01 2.88e-01 3.08e-01 1.27e+00 1.45e+00   ph/cm2/s
              Error 9.59e-02 5.81e-02 4.94e-02 1.08e-01 1.68e-01 1.91e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.77e-07 8.04e-07 7.35e-07 3.92e-07 2.27e-06 2.40e-06   erg/cm2
              Error 4.83e-08 4.76e-08 6.69e-08 2.21e-07 1.55e-07 2.71e-07   erg/cm2
Peak flux Cutoff-PL 4.30e-01 4.25e-01 2.90e-01 2.89e-01 1.27e+00 1.43e+00   ph/cm2/s
              Error 1.05e-01 5.90e-02 5.24e-02 1.63e-01 1.66e-01 2.41e-01   ph/cm2/s
 
Fluence        Band 4.68e-07 8.07e-07 7.17e-07 6.88e-07 2.29e-06 2.69e-06   erg/cm2
              Error 4.98e-08 5.03e-08 7.26e-08 5.59e-07 1.58e-07 4.71e-07   erg/cm2
Peak flux      Band 4.19e-01 4.33e-01 2.90e-01 2.81e-01 1.26e+00 1.43e+00   ph/cm2/s
              Error 9.65e-02 7.45e-02 5.17e-02 1.46e-01 1.70e-01 2.39e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.977    0.091    -      -           2.03e-03 1.14e-04   49.968 57
CPL   1.080    0.451      45.3    6.1      6.27e-03 3.84e-03   35.802 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.553    0.229    -      -           1.00e-02 1.36e-03   53.739 57
CPL   1.483    0.984     314.6    0.0      1.09e-02 1.36e-03   53.769 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: 82.432000 sec.
T50 in the 50-300 keV band: 29.184000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  131.872  -69.212   62.660
T90   101.752  -48.316   53.436
T50    31.856    4.084   35.940
Peak    1.000   17.596   18.596

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   20.8007 +38.1240 0.0060   32.0 -180.0       3.6152    32.2  TRIG_00335895       
------------------------------------------
 
Foreground time interval of the image:
 -5.099  62.660 (delta_t =  67.759 [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  -69.212 sec. to   62.660 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97724     ( -9.050441E-02   9.236836E-02) )
Norm@50keV  : 2.027769E-03    ( -1.143069E-04   1.133652E-04) )
------------------------------------------------------------
 Chi-Squared =      49.96805     using    59 PHA bins.
 Reduced chi-squared =     0.8766325     for     57 degrees of freedom
 Null hypothesis probability = 0.734
 
Photon flux (15-150 keV)    in 131.9 sec: 0.301025 ( -0.015048  0.015074 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.464e-06 ( -1.33364e-07  1.33971e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -69.212 sec. to   62.660 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08039     ( -0.475225   0.426986 )
Epeak [keV] : 45.3261      ( -5.44823 6.79970 )
Norm@50keV  : 6.269987E-03    ( -2.578059E-03   5.097705E-03) )
------------------------------------------------------------
 Chi-Squared =      35.80206     using    59 PHA bins.
 Reduced chi-squared =     0.6393224     for     56 degrees of freedom
 Null hypothesis probability = 0.984
 
Photon flux (15-150 keV)    in 131.9 sec: 0.286612 ( -0.016306  0.01635 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.27104e-06 ( -1.53175e-07  1.57396e-07 ) ergs/cm2
 
Band function
Time interval is from  -69.212 sec. to   62.660 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.05276   ( -0.418097   1.60233 )
beta        : -2.76955    ( -7.23045   0.566215 )
Epeak [keV] : 44.4508      ( -11.1457 6.44565 )
Norm@50keV   : 6.580143E-03    ( -2.698353E-03   7.393762E-02) )
------------------------------------------------------------
 Chi-Squared =      35.29068     using    59 PHA bins.
 Reduced chi-squared =     0.6416487     for     55 degrees of freedom
 Null hypothesis probability = 0.982
 
Photon flux (15-150 keV)    in 131.9 sec: 0.286395 ( -0.016189  0.016274 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29089e-06 ( -1.60918e-07  1.55167e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   17.596 sec. to   18.596 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55328     ( -0.227559   0.230907 )
Norm@50keV  : 1.001347E-02    ( -1.362538E-03   1.348015E-03) )
------------------------------------------------------------
 Chi-Squared =      53.73917     using    59 PHA bins.
 Reduced chi-squared =     0.9427925     for     57 degrees of freedom
 Null hypothesis probability = 0.598
 
Photon flux (15-150 keV)    in 1.000 sec: 1.26885 ( -0.16801  0.16833 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.42122e-08 ( -1.37955e-08  1.39958e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   17.596 sec. to   18.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48293     ( -0.952320   1.01545 )
Epeak [keV] : 314.579      (   )
Norm@50keV  : 1.088918E-02    ( -1.370923E-03   1.355156E-03) )
------------------------------------------------------------
 Chi-Squared =      53.76878     using    59 PHA bins.
 Reduced chi-squared =     0.9601569     for     56 degrees of freedom
 Null hypothesis probability = 0.560
 
Photon flux (15-150 keV)    in 1.000 sec: 1.26636 ( -0.16609  0.16629 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.42589e-08 ( -1.38233e-08  1.39741e-08 ) ergs/cm2
 
Band function
Time interval is from   17.596 sec. to   18.596 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.974215   ( -9.02579   4.21277 )
beta        : -1.58935    ( -8.41065   0.258590 )
Epeak [keV] : 52.0109      ( -51.9109 585.778 )
Norm@50keV   : 2.506279E-02    ( -1.637691E-02   576.724 )
------------------------------------------------------------
 Chi-Squared =      53.62059     using    59 PHA bins.
 Reduced chi-squared =     0.9749198     for     55 degrees of freedom
 Null hypothesis probability = 0.527
 
Photon flux (15-150 keV)    in 1.000 sec: 1.26050 ( -0.17087  0.17006 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.29362e-08 ( -1.24243e-08  1.24598e-08 ) ergs/cm2
 
Plot creation:
Fri Nov 28 22:38:36 EST 2008