batgrbproduct Analysis for Trigger=155408

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 11:34:54 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger155408/SDC
======================================================================

  Trigger: 00155408      Segment: 000

  BAT Trigger Time: 148581352   [s; MET]
      Trigger Stop: 148581472   [s; MET]
               UTC: 2005-09-16T16:35:52.267640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 135.992250681767   Dec: -51.4255835934932  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.77
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.77

  Flight Position:   [ source = BAT ]
    RA: 135.992250681767   Dec: -51.4255835934932  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 136.056883156863   Dec: -51.3743992210269  [deg; J2000]  
        { 09h 04m 13.7s , -51d 22' 27.8" }
         +/- 4.03047182409539 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.37384519963774 [arcmin] (formal 1-sigma fit error)
    SNR: 4.15263970569892
    RA  =   9h  4m 13.7s  (136.056883 deg.)
    Dec = -51d 22' 28" (-51.374399 deg.)
 
  Angular difference between Flight and Ground position is 3.909577 arcmin
 
  Partial Coding Fraction: 0.421875    [ including projection effects ]

  Duration
     T90: 64 +/- 22.6274169979695
        Measured from: 5
                   to: 69     [s; relative to TRIGTIME]
     T50: 16 +/- 22.6274169979695
        Measured from: 21
                   to: 37     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 44.5     
                   to: 45.5     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 5     
                   to: 69     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.398841   0.620311   0.339905   0.113908
           0.063929   0.064768   0.056978   0.051278 [error]
 Peak      0.184856   0.175899   0.127436   0.037812
           0.032308   0.032848   0.028924   0.025908 [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 1.62e-07 2.55e-07 3.03e-07 7.01e-07 9.24e-07 1.42e-06   erg/cm2
              Error 3.29e-08 3.33e-08 5.60e-08 2.67e-07 1.33e-07 3.18e-07   erg/cm2
Peak flux Power-law 1.29e-01 9.97e-02 5.16e-02 3.85e-02 2.98e-01 3.19e-01   ph/cm2/s
              Error 3.66e-02 1.87e-02 1.57e-02 2.30e-02 5.64e-02 6.01e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.45e-07 2.82e-07 3.08e-07 2.11e-07 8.63e-07 9.53e-07   erg/cm2
              Error 3.95e-08 4.67e-08 6.58e-08 4.02e-07 1.55e-07 4.42e-07   erg/cm2
Peak flux Cutoff-PL 1.29e-01 9.98e-02 5.16e-02 3.83e-02 2.98e-01 3.19e-01   ph/cm2/s
              Error 3.66e-02 1.87e-02 1.58e-02 2.29e-02 5.64e-02 6.00e-02   ph/cm2/s
 
Fluence        Band 1.38e-07 2.90e-07 2.96e-07 3.98e-07 8.72e-07 1.12e-06   erg/cm2
              Error 4.03e-08 4.77e-08 6.22e-08 3.44e-07 1.43e-07 3.83e-07   erg/cm2
Peak flux      Band 1.29e-01 9.98e-02 5.16e-02 3.83e-02 2.98e-01 3.19e-01   ph/cm2/s
              Error 3.89e-02 1.87e-02 1.58e-02 2.29e-02 5.64e-02 6.53e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.749    0.226    -      -           1.56e-03 2.18e-04   52.396 57
CPL   0.876    1.245      59.0 4978.2      4.65e-03 1.50e-02   50.541  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.950    0.365    -      -           2.03e-03 4.69e-04   62.012 57
CPL   1.810    0.000      63.6    0.0      2.40e-03 5.24e-03   62.058 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: 33.664000 sec.
T50 in the 50-300 keV band: 12.096000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   64.000    5.000   69.000
T90    64.000    5.000   69.000
T50    16.000   21.000   37.000
Peak    1.000   44.500   45.500

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  136.0569 -51.3744 0.0465   41.4 -145.2       1.5203     4.2  TRIG_00155408       
------------------------------------------
 
Foreground time interval of the image:
  5.000  69.000 (delta_t =  64.000 [sec])
Background time interval of the image:
 -2.595   5.000 (delta_t =   7.595 [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    5.000 sec. to   69.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74916     ( -0.222217   0.229188 )
Norm@50keV  : 1.564112E-03    ( -2.194701E-04   2.161302E-04) )
------------------------------------------------------------
 Chi-Squared =      52.39632     using    59 PHA bins.
 Reduced chi-squared =     0.9192337     for     57 degrees of freedom
 Null hypothesis probability = 0.648
 
Photon flux (15-150 keV)    in 64.00 sec: 0.211430 ( -0.027878  0.027935 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.23565e-07 ( -1.32333e-07  1.34355e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    5.000 sec. to   69.000 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.875676     ( -1.49044   0.998676 )
Epeak [keV] : 58.9520      ( -15.2768 9941.05 )
Norm@50keV  : 4.645674E-03    ( -4.645674E-03   2.537397E-02) )
------------------------------------------------------------
 Chi-Squared =      50.54089     using    59 PHA bins.
 but latest trial   1.87435     gives Chi-Squared =   2.76714
 Reduced chi-squared =     0.9025158     for     56 degrees of freedom
 Null hypothesis probability = 0.681
 
Photon flux (15-150 keV)    in 64.00 sec: 0.204786 ( -0.029663  0.029326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.63392e-07 ( -1.53837e-07  1.55258e-07 ) ergs/cm2
 
Band function
Time interval is from    5.000 sec. to   69.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.452045   ( -1.58083   2.88981 )
beta        : -2.30654    ( -7.69346   0.597268 )
Epeak [keV] : 50.1589      ( -30.4493 528.498 )
Norm@50keV   : 8.440110E-03    ( -8.440110E-03   0.974423 )
------------------------------------------------------------
 Chi-Squared =      49.65913     using    59 PHA bins.
 Reduced chi-squared =     0.9028932     for     55 degrees of freedom
 Null hypothesis probability = 0.678
 
Photon flux (15-150 keV)    in 64.00 sec: 0.203549 ( -0.029688  0.029013 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.71994e-07 ( -1.43354e-07  1.43206e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   37.000 sec. to   53.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.95048     ( -0.347227   0.382507 )
Norm@50keV  : 2.033186E-03    ( -4.810888E-04   4.563886E-04) )
------------------------------------------------------------
 Chi-Squared =      62.01237     using    59 PHA bins.
 Reduced chi-squared =      1.087936     for     57 degrees of freedom
 Null hypothesis probability = 0.302
 
Photon flux (15-150 keV)    in 16.00 sec: 0.298240 ( -0.056349  0.056401 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99378e-07 ( -6.58656e-08  6.75408e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   37.000 sec. to   53.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81044     (     )
Epeak [keV] : 63.5558      (   )
Norm@50keV  : 2.398195E-03    ( -5.016612E-04   9.978490E-03) )
------------------------------------------------------------
 Chi-Squared =      62.05789     using    59 PHA bins.
 Reduced chi-squared =      1.108177     for     56 degrees of freedom
 Null hypothesis probability = 0.269
 
Photon flux (15-150 keV)    in 16.00 sec: 0.298145 ( -0.056331  0.056383 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99485e-07 ( -6.58976e-08  6.75184e-08 ) ergs/cm2
 
Band function
Time interval is from   37.000 sec. to   53.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.85452   ( -6.32228   8.66384 )
beta        : -8.51624    ( -0.382002   0.347477 )
Epeak [keV] : 71.1135      ( -71.0135 9928.89 )
Norm@50keV   : 2.277151E-03    ( -6.539506E-02   6.203273E-02) )
------------------------------------------------------------
 Chi-Squared =      62.03443     using    59 PHA bins.
 Reduced chi-squared =      1.127899     for     55 degrees of freedom
 Null hypothesis probability = 0.240
 
Photon flux (15-150 keV)    in 16.00 sec: 0.298146 ( -0.056331  0.05637 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99838e-07 ( -5.61568e-08  5.62368e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 11:55:15 EST 2008