batgrbproduct Analysis for Trigger=282445

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 02:26:14 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger282445/GCN5_download_cron
======================================================================

  Trigger: 00282445      Segment: 000

  BAT Trigger Time: 203704176   [s; MET]
      Trigger Stop: 203704240   [s; MET]
               UTC: 2007-06-16T16:29:33.974040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 32.1553533187329   Dec: 56.9481781851878  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.92
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.92

  Flight Position:   [ source = BAT ]
    RA: 32.1553533187329   Dec: 56.9481781851878  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 32.0966670768743   Dec: 56.944639970781  [deg; J2000]  
        { 02h 08m 23.2s , +56d 56' 40.7" }
         +/- 2.70827071489915 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.5890672462162 [arcmin] (formal 1-sigma fit error)
    SNR: 7.3280233789102
    RA  =   2h  8m 23.2s  (32.096667 deg.)
    Dec =  56d 56' 41" (56.944640 deg.)
 
  Angular difference between Flight and Ground position is 1.932228 arcmin
 
  Partial Coding Fraction: 0.609375    [ including projection effects ]

  Duration
     T90: 402.356000006199 +/- 16.337113588242
        Measured from: 92.3759999871254
                   to: 494.731999993324     [s; relative to TRIGTIME]
     T50: 199.09999999404 +/- 5.64298962099925
        Measured from: 161.108000010252
                   to: 360.208000004292     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 139.743999987841     
                   to: 140.743999987841     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.64399999380112     
                   to: 602.224000006914     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     9.846492  12.363082   8.669295   1.797473
           0.126841   0.129564   0.118635   0.108522 [error]
 Peak      0.059680   0.091304   0.078001   0.026147
           0.005548   0.005992   0.005816   0.004919 [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 3.17e-06 5.33e-06 6.82e-06 1.75e-05 2.02e-05 3.28e-05   erg/cm2
              Error 1.32e-07 1.23e-07 1.45e-07 9.19e-07 3.62e-07 9.48e-07   erg/cm2
Peak flux Power-law 5.68e-01 6.53e-01 5.40e-01 7.49e-01 2.03e+00 2.51e+00   ph/cm2/s
              Error 8.21e-02 5.55e-02 4.75e-02 1.45e-01 1.52e-01 1.92e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.92e-06 5.36e-06 6.98e-06 1.29e-05 1.98e-05 2.84e-05   erg/cm2
              Error 1.90e-07 1.27e-07 1.72e-07 2.30e-06 3.18e-07 2.37e-06   erg/cm2
Peak flux Cutoff-PL 5.67e-01 6.54e-01 5.40e-01 7.45e-01 2.03e+00 2.51e+00   ph/cm2/s
              Error 8.21e-02 5.55e-02 4.75e-02 1.44e-01 1.52e-01 1.91e-01   ph/cm2/s
 
Fluence        Band 2.90e-06 5.34e-06 6.96e-06 1.29e-05 1.98e-05 2.82e-05   erg/cm2
              Error 1.89e-07 1.26e-07 1.72e-07 2.30e-06 4.24e-07 2.36e-06   erg/cm2
Peak flux      Band 5.39e-01 6.45e-01 5.44e-01 7.65e-01 2.03e+00 2.54e+00   ph/cm2/s
              Error 1.07e-01 4.75e-02 4.17e-02 9.72e-02 1.48e-01 1.84e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.645    0.038    -      -           3.59e-03 6.46e-05   58.818 57
CPL   1.378    0.165     136.1   69.6      4.66e-03 7.36e-04   50.607 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.275    0.136    -      -           1.71e-02 1.24e-03   46.175 57
CPL   1.271    0.137    9992.9 5000.0      1.72e-02 1.25e-03   46.191 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: 343.936000 sec.
T50 in the 50-300 keV band: 171.968000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  604.868   -2.644  602.224
T90   402.356   92.376  494.732
T50   199.100  161.108  360.208
Peak    1.000  139.744  140.744

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   32.0967 +56.9446 0.0262   26.6  -64.5       1.0443     7.3  TRIG_00282445       
------------------------------------------
 
Foreground time interval of the image:
 -2.644  70.501 (delta_t =  73.145 [sec])
Background time interval of the image:
-72.499  -2.644 (delta_t =  69.855 [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
Multiple GTIs in the spectrum
tstart tstop
-2.644000 496.990000
498.000000 602.224000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64525     ( -3.770030E-02   3.771734E-02) )
Norm@50keV  : 3.588670E-03    ( -6.463961E-05   6.461353E-05) )
------------------------------------------------------------
 Chi-Squared =      58.81788     using    59 PHA bins.
 Reduced chi-squared =      1.031893     for     57 degrees of freedom
 Null hypothesis probability = 0.409
 
Photon flux (15-150 keV)    in 603.9 sec: 0.467862 ( -0.010738  0.010814 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.01654e-05 ( -3.62098e-07  3.62159e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-2.644000 496.990000
498.000000 602.224000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37784     ( -0.169784   0.159442 )
Epeak [keV] : 136.065      ( -30.8867 108.394 )
Norm@50keV  : 4.655791E-03    ( -6.553777E-04   8.161650E-04) )
------------------------------------------------------------
 Chi-Squared =      50.60677     using    59 PHA bins.
 Reduced chi-squared =     0.9036923     for     56 degrees of freedom
 Null hypothesis probability = 0.678
 
Photon flux (15-150 keV)    in 603.9 sec: 0.453965 ( -0.013119  0.013276 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97988e-05 ( -2.13599e-07  4.2273e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-2.644000 496.990000
498.000000 602.224000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.35822   ( -0.180098   0.151278 )
beta        : -9.26197    ( -0.738029   7.52519 )
Epeak [keV] : 130.587      ( -25.5697 115.412 )
Norm@50keV   : 4.743933E-03    ( -7.479773E-04   7.321262E-04) )
------------------------------------------------------------
 Chi-Squared =      50.64066     using    59 PHA bins.
 Reduced chi-squared =     0.9207392     for     55 degrees of freedom
 Null hypothesis probability = 0.642
 
Photon flux (15-150 keV)    in 603.9 sec: 0.453974 ( -0.013147  0.013302 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97777e-05 ( -4.24421e-07  4.24119e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  139.744 sec. to  140.744 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27513     ( -0.136240   0.135771 )
Norm@50keV  : 1.711486E-02    ( -1.243113E-03   1.242371E-03) )
------------------------------------------------------------
 Chi-Squared =      46.17455     using    59 PHA bins.
 Reduced chi-squared =     0.8100798     for     57 degrees of freedom
 Null hypothesis probability = 0.847
 
Photon flux (15-150 keV)    in 1.000 sec: 2.03279 ( -0.1522  0.15263 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.7012e-07 ( -1.3882e-08  1.4069e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  139.744 sec. to  140.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27123     ( -0.137177   0.136649 )
Epeak [keV] : 9992.92      ( -9992.91 7.08008 )
Norm@50keV  : 1.718975E-02    ( -1.249738E-03   1.248661E-03) )
------------------------------------------------------------
 Chi-Squared =      46.19116     using    59 PHA bins.
 Reduced chi-squared =     0.8248422     for     56 degrees of freedom
 Null hypothesis probability = 0.822
 
Photon flux (15-150 keV)    in 1.000 sec: 2.03211 ( -0.15215  0.15258 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70206e-07 ( -1.3938e-08  1.403e-08 ) ergs/cm2
 
Band function
Time interval is from  139.744 sec. to  140.744 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01921   ( -8.98079   4.01569 )
beta        : -1.27481    ( -8.72519   0.136063 )
Epeak [keV] : 42.2472      ( -42.1472 3331.98 )
Norm@50keV   : 3.256700E-02    ( -1.669285E-02   4.33312 )
------------------------------------------------------------
 Chi-Squared =      46.17505     using    59 PHA bins.
 Reduced chi-squared =     0.8395463     for     55 degrees of freedom
 Null hypothesis probability = 0.796
 
Photon flux (15-150 keV)    in 1.000 sec: 2.02887 ( -0.14705  0.149 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70074e-07 ( -1.3939e-08  1.4017e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 14 02:47:37 EST 2007