batgrbproduct Analysis for Trigger=306745

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Mar 19 10:06:49 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger306745/GCN5_download_cron
======================================================================

  Trigger: 00306745      Segment: 000

  BAT Trigger Time: 227584632   [s; MET]
      Trigger Stop: 227584696   [s; MET]
               UTC: 2008-03-19T01:57:09.346700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 244.637321123988   Dec: -15.275254374716  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    18.71
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    18.71

  Flight Position:   [ source = BAT ]
    RA: 244.637321123988   Dec: -15.275254374716  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 244.644298719222   Dec: -15.2806989048191  [deg; J2000]  
        { 16h 18m 34.6s , -15d 16' 50.5" }
         +/- 1.286362959802 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.597676308792213 [arcmin] (formal 1-sigma fit error)
    SNR: 21.2268118782609
    RA  =  16h 18m 34.6s  (244.644299 deg.)
    Dec =  -15d 16' 51" (-15.280699 deg.)
 
  Angular difference between Flight and Ground position is 0.519439 arcmin
 
  Partial Coding Fraction: 0.421875    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.389056   0.254361   0.020264   0.063229
           0.071750   0.062616   0.053348   0.047587 [error]
 Peak      2.389056   0.254361   0.020264   0.063229
           0.071750   0.062616   0.053348   0.047587 [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 8.90e-07 1.24e-07 7.78e-09 5.15e-10 1.02e-06 1.02e-06   erg/cm2
              Error 1.06e-07 3.09e-08 4.72e-09 5.53e-10 1.11e-07 1.11e-07   erg/cm2
Peak flux Power-law 4.91e-01 4.01e-02 1.25e-03 4.04e-05 5.32e-01 5.32e-01   ph/cm2/s
              Error 6.01e-02 9.50e-03 7.41e-04 4.97e-05 6.06e-02 6.06e-02   ph/cm2/s
 
Fluence   Cutoff-PL 9.07e-07 9.90e-08 7.76e-10 1.52e-13 1.01e-06 1.01e-06   erg/cm2
              Error 1.13e-07 4.46e-08 5.81e-09 4.96e-10 1.13e-07 1.13e-07   erg/cm2
Peak flux Cutoff-PL 4.90e-01 4.00e-02 1.25e-03 4.00e-05 5.31e-01 5.31e-01   ph/cm2/s
              Error 6.00e-02 9.50e-03 7.39e-04 4.93e-05 6.05e-02 6.05e-02   ph/cm2/s
 
Fluence        Band 8.82e-07 1.20e-07 6.71e-09 3.74e-10 1.03e-06 7.75e-07   erg/cm2
              Error 1.04e-07 3.43e-08 1.11e-07 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 4.90e-01 4.00e-02 2.27e-04 7.75e-07 5.29e-01 5.31e-01   ph/cm2/s
              Error 6.03e-02 4.13e-05 5.77e-02 6.05e-02 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    6.000    0.507    -      -           1.29e-04 6.37e-05   48.088 57
CPL   1.707    0.000       1.4    5.4      4.82e-01 8.97e+02   46.921  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    6.000    0.507    -      -           1.29e-04 6.37e-05   48.088 57
CPL   1.707    0.935       1.4    2.9      4.82e-01 0.00e+00   46.921  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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  244.6443 -15.2807 0.0090   38.0  157.4       2.8460    21.2  TRIG_00306745       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.99977     ( -0.497203   0.516554 )
Norm@50keV  : 1.293127E-04    ( -5.177446E-05   7.567856E-05) )
------------------------------------------------------------
 Chi-Squared =      48.08831     using    59 PHA bins.
 Reduced chi-squared =     0.8436546     for     57 degrees of freedom
 Null hypothesis probability = 0.794
 
Photon flux (15-150 keV)    in 64.00 sec: 0.531951 ( -0.060598  0.060668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02257e-06 ( -1.11309e-07  1.11347e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70704     (     )
Epeak [keV] : 1.39622      ( -0.498099 10.2494 )
Norm@50keV  : 0.481971    ( -0.233015   1793.37 )
------------------------------------------------------------
 Chi-Squared =      46.92144     using    59 PHA bins.
 but latest trial  0.141242     gives Chi-Squared =   12.2984
 but latest trial   12.3512     gives Chi-Squared =   20.7069
 Reduced chi-squared =     0.8378829     for     56 degrees of freedom
 Null hypothesis probability = 0.801
 
Photon flux (15-150 keV)    in 64.00 sec: 0.531295 ( -0.060495  0.060562 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0063e-06 ( -1.13248e-07  1.128e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.28617   ( -0.713828   1.37194 )
beta        : -5.99932    ( -0.516770   0.497142 )
Epeak [keV] : 312.873      ( -312.773 9687.13 )
Norm@50keV   : 1.758097E-02    ( -7.042355E-03   1.028032E-02) )
------------------------------------------------------------
 Chi-Squared =      48.08831     using    59 PHA bins.
 Reduced chi-squared =     0.8743329     for     55 degrees of freedom
 Null hypothesis probability = 0.734
 
Photon flux (15-150 keV)    in 64.00 sec: 0.529391 ( -0.054552  0.060816 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03127e-06 ( -1.11456e-07  1.11462e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.99977     ( -0.497203   0.516554 )
Norm@50keV  : 1.293127E-04    ( -5.177446E-05   7.567856E-05) )
------------------------------------------------------------
 Chi-Squared =      48.08831     using    59 PHA bins.
 Reduced chi-squared =     0.8436546     for     57 degrees of freedom
 Null hypothesis probability = 0.794
 
Photon flux (15-150 keV)    in 64.00 sec: 0.531951 ( -0.060598  0.060668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02257e-06 ( -1.11309e-07  1.11347e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70704     ( -0.976059   0.892987 )
Epeak [keV] : 1.39622      ( -0.760048 5.01637 )
Norm@50keV  : 0.481971    (     )
------------------------------------------------------------
 Chi-Squared =      46.92144     using    59 PHA bins.
 but latest trial  0.961520     gives Chi-Squared =  4.317093E-02
 but latest trial   6.41259     gives Chi-Squared =  0.520100
 Reduced chi-squared =     0.8378829     for     56 degrees of freedom
 Null hypothesis probability = 0.801
 
Photon flux (15-150 keV)    in 64.00 sec: 0.531295 ( -0.060495  0.060562 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0063e-06 ( -1.13248e-07  1.128e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.28617   ( -0.713828   1.21878 )
beta        : -5.99932    ( -0.516770   0.497142 )
Epeak [keV] : 312.873      ( -312.773 9687.13 )
Norm@50keV   : 1.758097E-02    ( -7.042355E-03   1.028032E-02) )
------------------------------------------------------------
 Chi-Squared =      48.08831     using    59 PHA bins.
 Reduced chi-squared =     0.8743329     for     55 degrees of freedom
 Null hypothesis probability = 0.734
 
Photon flux (15-150 keV)    in 64.00 sec: 0.529391 ( -0.054552  0.060816 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03127e-06 ( -1.11456e-07  1.11462e-07 ) ergs/cm2
 
Plot creation:
Wed Mar 19 10:17:32 EDT 2008