batgrbproduct Analysis for Trigger=252593

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 17:42:43 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger252593/SDC
======================================================================

  Trigger: 00252593      Segment: 000

  BAT Trigger Time: 188453464   [s; MET]
      Trigger Stop: 188453528   [s; MET]
               UTC: 2006-12-22T04:11:02.350780    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 105.357290328966   Dec: -25.8555478617164  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.83
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.83

  Flight Position:   [ source = BAT ]
    RA: 105.357290328966   Dec: -25.8555478617164  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 105.354928817218   Dec: -25.8661513801757  [deg; J2000]  
        { 07h 01m 25.2s , -25d 51' 58.1" }
         +/- 1.3114063189005 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.423279295607933 [arcmin] (formal 1-sigma fit error)
    SNR: 20.6501056153599
    RA  =   7h  1m 25.2s  (105.354929 deg.)
    Dec = -25d 51' 58" (-25.866151 deg.)
 
  Angular difference between Flight and Ground position is 0.648861 arcmin
 
  Partial Coding Fraction: 0.15625    [ including projection effects ]

  Duration
     T90: 40 +/- 6.17724340223664
        Measured from: 38.6960000097752
                   to: 78.6960000097752     [s; relative to TRIGTIME]
     T50: 19.2000000178814 +/- 2.503373745358
        Measured from: 47.0160000026226
                   to: 66.216000020504     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 59.1559999883175     
                   to: 60.1559999883175     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 35.1119999885559     
                   to: 84.9040000140667     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.415233   1.593626   0.878566   0.122996
           0.093200   0.094815   0.080827   0.067855 [error]
 Peak      0.079980   0.060466   0.029928   0.015012
           0.013641   0.013565   0.011573   0.009879 [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 4.85e-07 6.69e-07 6.81e-07 1.26e-06 2.24e-06 3.10e-06   erg/cm2
              Error 5.43e-08 4.90e-08 7.82e-08 2.93e-07 1.83e-07 3.71e-07   erg/cm2
Peak flux Power-law 8.10e-01 5.14e-01 2.10e-01 1.17e-01 1.59e+00 1.65e+00   ph/cm2/s
              Error 2.28e-01 1.22e-01 8.63e-02 8.70e-02 3.61e-01 3.77e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.44e-07 7.22e-07 6.85e-07 4.72e-07 2.12e-06 2.36e-06   erg/cm2
              Error 6.25e-08 6.41e-08 8.81e-08 3.80e-07 2.01e-07 4.34e-07   erg/cm2
Peak flux Cutoff-PL 7.71e-01 6.20e-01 1.67e-01 1.18e-02 1.57e+00 1.57e+00   ph/cm2/s
              Error 2.48e-01 1.68e-01 1.44e-01 6.33e-02 3.56e-01 3.57e-01   ph/cm2/s
 
Fluence        Band 4.40e-07 7.18e-07 6.82e-07 4.72e-07 2.12e-06 2.39e-06   erg/cm2
              Error 6.19e-08 6.40e-08 8.79e-08 3.79e-07 2.01e-07 5.82e-07   erg/cm2
Peak flux      Band 7.72e-01 6.20e-01 1.67e-01 1.18e-02 1.57e+00 1.57e+00   ph/cm2/s
              Error 2.00e-01 1.52e-01 5.59e-02 9.59e-02 3.47e-01 3.52e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.973    0.134    -      -           4.88e-03 4.12e-04   67.882 57
CPL   1.296    0.565      46.7   15.7      1.15e-02 9.15e-03   62.869 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.289    0.416    -      -           9.17e-03 2.93e-03   87.473 57
CPL   0.635    2.486      29.1   21.1      1.07e-01 1.38e+01   84.730  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: 31.168000 sec.
T50 in the 50-300 keV band: 17.664000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   49.792   35.112   84.904
T90    40.000   38.696   78.696
T50    19.200   47.016   66.216
Peak    1.000   59.156   60.156

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  105.3549 -25.8662 0.0093   37.2  104.1       4.0811    20.7  TRIG_00252593       
------------------------------------------
 
Foreground time interval of the image:
 35.112  80.405 (delta_t =  45.293 [sec])
Background time interval of the image:
-239.000  35.112 (delta_t = 274.112 [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   35.112 sec. to   84.904 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97321     ( -0.132454   0.136288 )
Norm@50keV  : 4.882177E-03    ( -4.147957E-04   4.092767E-04) )
------------------------------------------------------------
 Chi-Squared =      67.88243     using    59 PHA bins.
 Reduced chi-squared =      1.190920     for     57 degrees of freedom
 Null hypothesis probability = 0.153
 
Photon flux (15-150 keV)    in 49.79 sec: 0.723456 ( -0.054488  0.054582 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.23873e-06 ( -1.82177e-07  1.8386e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   35.112 sec. to   84.904 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29564     ( -0.602680   0.527616 )
Epeak [keV] : 46.6549      ( -12.4570 18.8899 )
Norm@50keV  : 1.147829E-02    ( -5.475210E-03   1.283280E-02) )
------------------------------------------------------------
 Chi-Squared =      62.86897     using    59 PHA bins.
 Reduced chi-squared =      1.122660     for     56 degrees of freedom
 Null hypothesis probability = 0.246
 
Photon flux (15-150 keV)    in 49.79 sec: 0.702982 ( -0.056754  0.056794 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.12481e-06 ( -1.98468e-07  2.0383e-07 ) ergs/cm2
 
Band function
Time interval is from   35.112 sec. to   84.904 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.29774   ( -0.525688   0.604149 )
beta        : -9.09008    ( -0.909916   7.09254 )
Epeak [keV] : 46.6561      ( -12.4649 18.8817 )
Norm@50keV   : 1.144650E-02    ( -5.878723E-03   1.286907E-02) )
------------------------------------------------------------
 Chi-Squared =      62.86912     using    59 PHA bins.
 Reduced chi-squared =      1.143075     for     55 degrees of freedom
 Null hypothesis probability = 0.218
 
Photon flux (15-150 keV)    in 49.79 sec: 0.703013 ( -0.056789  0.056767 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.12333e-06 ( -1.99304e-07  2.02581e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   59.176 sec. to   60.136 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.28923     ( -0.387061   0.444644 )
Norm@50keV  : 9.170931E-03    ( -2.955567E-03   2.911862E-03) )
------------------------------------------------------------
 Chi-Squared =      87.47340     using    59 PHA bins.
 Reduced chi-squared =      1.534621     for     57 degrees of freedom
 Null hypothesis probability = 5.834E-03
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.59310 ( -0.36108  0.36108 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.39079e-08 ( -2.2372e-08  2.36178e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   59.176 sec. to   60.136 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 0.635174     ( -3.63517   1.33677 )
Epeak [keV] : 29.0810      ( -27.2440 14.8726 )
Norm@50keV  : 0.106571    ( -0.106571   27.4959 )
------------------------------------------------------------
 Chi-Squared =      84.73018     using    59 PHA bins.
 but latest trial   2.00133     gives Chi-Squared =   4.21743
 but latest trial   1.78238     gives Chi-Squared =   4.03069
 Reduced chi-squared =      1.513039     for     56 degrees of freedom
 Null hypothesis probability = 7.882E-03
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.56909 ( -0.35446  0.35711 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.41977e-08 ( -2.13562e-08  2.44634e-08 ) ergs/cm2
 
Band function
Time interval is from   59.176 sec. to   60.136 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.825380   ( -15.0000   3.814697E-06) )
beta        : -9.27612    ( -1.66375   13.0289 )
Epeak [keV] : 29.1645      ( -6.81681 2.66452 )
Norm@50keV   : 7.779181E-02    ( -1564.30   7810.93 )
------------------------------------------------------------
 Chi-Squared =      84.76604     using    59 PHA bins.
 Reduced chi-squared =      1.541201     for     55 degrees of freedom
 Null hypothesis probability = 6.113E-03
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.56901 ( -0.34824  0.34667 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.93771e-08 ( -2.12296e-08  2.11944e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 18:12:04 EST 2008