batgrbproduct Analysis for Trigger=323870

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Thu Aug  6 11:17:53 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/323870
======================================================================

  Trigger: 00323870      Segment: 000

  BAT Trigger Time: 242308738.048   [s; MET]
      Trigger Stop: 242308738.304   [s; MET]
               UTC: 2008-09-05T11:58:54.973940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 287.661676067797   Dec: -18.8772722987606  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.87
     Image Trigger?:     NO
     Rate S/N Ratio:     29.0344622819159  [ if not an image trigger ]
     Image S/N Ratio:    6.87

  Flight Position:   [ source = BAT ]
    RA: 287.661676067797   Dec: -18.8772722987606  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 287.667070250673   Dec: -18.8666914499791  [deg; J2000]  
        { 19h 10m 40.1s , -18d 52' 00.1" }
         +/- 2.08490420128634 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.764992115125948 [arcmin] (formal 1-sigma fit error)
    SNR: 10.6483198509038
 
  Angular difference between Flight and Ground position is 0.704859 arcmin
 
  Partial Coding Fraction: 0.5625    [ including projection effects ]

  Duration
     T90: 1.01600003242493 +/- 0.0815843255901954
        Measured from: 0.0479999780654907
                   to: 1.06400001049042     [s; relative to TRIGTIME]
     T50: 0.768000036478043 +/- 0.120000004768375
        Measured from: 0.179999977350235
                   to: 0.948000013828278     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0399999916553497     
                   to: 1.03999999165535     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0399999916553497     
                   to: 1.12799999117851     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.011610   0.062965   0.065322   0.036225
           0.007346   0.008028   0.007953   0.007170 [error]
 Peak      0.009954   0.056345   0.058198   0.034752
           0.007015   0.007665   0.007648   0.006936 [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 7.96e-09 2.26e-08 5.21e-08 3.24e-07 1.41e-07 4.07e-07   erg/cm2
              Error 2.49e-09 4.25e-09 6.99e-09 1.04e-07 1.91e-08 1.06e-07   erg/cm2
Peak flux Power-law 2.14e-01 3.40e-01 4.08e-01 9.52e-01 1.24e+00 1.91e+00   ph/cm2/s
              Error 7.37e-02 7.20e-02 5.64e-02 2.93e-01 1.85e-01 3.00e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.60e-09 2.28e-08 5.33e-08 2.63e-07 1.40e-07 3.46e-07   erg/cm2
              Error 2.92e-09 4.48e-09 8.63e-09 2.17e-07 1.95e-08 1.69e-07   erg/cm2
Peak flux Cutoff-PL 2.08e-01 3.41e-01 4.13e-01 8.67e-01 1.23e+00 1.83e+00   ph/cm2/s
              Error 8.50e-02 7.39e-02 6.93e-02 1.87e-01 4.60e-01 0.00e+00   ph/cm2/s
 
Fluence        Band 7.54e-09 2.27e-08 5.32e-08 2.63e-07 1.40e-07 3.30e-07   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 1.55e-01 3.73e-01 4.17e-01 8.70e-01 1.21e+00 1.80e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 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    0.795    0.242    -      -           1.10e-02 1.61e-03   50.300 57
CPL   0.627    0.830     499.3    0.0      1.30e-02 1.19e-02   50.200 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.739    0.259    -      -           1.07e-02 1.69e-03   49.630 57
CPL   0.641    0.703     855.8    0.0      1.18e-02 1.08e-02   49.600 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: 1.024000 sec.
T50 in the 50-300 keV band: 0.832000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    1.088    0.040    1.128
T90     1.016    0.048    1.064
T50     0.768    0.180    0.948
Peak    1.000    0.040    1.040

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  287.6671 -18.8667 0.0181   39.6   -6.5       0.1762    10.6  TRIG_00323870       
------------------------------------------
 
Foreground time interval of the image:
  0.040   1.128 (delta_t =   1.088 [sec])
Background time interval of the image:
-749.147 -701.951 (delta_t =  47.196 [sec])
-239.048   0.040 (delta_t = 239.088 [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    0.040 sec. to    1.128 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.794893     ( -0.250696   0.232787 )
Norm@50keV  : 1.10397E-02    ( -0.00162857   0.00158854 )
------------------------------------------------------------
# Chi-Squared =          50.30 using 59 PHA bins.
# Reduced chi-squared =         0.8825 for     57 degrees of freedom 
# Null hypothesis probability =   7.226037e-01
 
Photon flux (15-150 keV)    in 1.088 sec: 1.26907 ( -0.1791  0.180251 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40664e-07 ( -1.90668e-08  1.91138e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.040 sec. to    1.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.626821     ( -1.03686   0.623252 )
Epeak [keV] : 499.275      ( -500.137 -500.137 )
Norm@50keV  : 1.29966E-02    ( -0.00309095   0.0207787 )
------------------------------------------------------------
# Chi-Squared =          50.20 using 59 PHA bins.
# Reduced chi-squared =         0.8964 for     56 degrees of freedom 
# Null hypothesis probability =   6.930455e-01
 
Photon flux (15-150 keV)    in 1.088 sec: 1.26276 ( -0.18128  0.18296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40128e-07 ( -1.96721e-08  1.93762e-08 ) ergs/cm2
 
Band function
Time interval is from    0.040 sec. to    1.128 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.744964   ( 0.744964   0.744964 )
beta        : -0.794893    ( -0.232502   0.250696 )
Epeak [keV] : 15.7907      ( -15.7907 -15.7907 )
Norm@50keV   : 1.63120E-02    ( -0.00684467   0 )
------------------------------------------------------------
# Chi-Squared =          50.30 using 59 PHA bins.
# Reduced chi-squared =         0.9146 for     55 degrees of freedom 
# Null hypothesis probability =   6.544155e-01
 
Photon flux (15-150 keV)    in 1.088 sec: 1.23574 ( -0.08899  0.16914 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4004e-07 ( -1.96547e-08  1.93686e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 26.2349  (-4.68402  6.61428)
R^2/D10^2   : 2.79009E-02  (-0.0135686   0.0232666)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          58.43 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     57 degrees of freedom 
# Null hypothesis probability =   4.227844e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.536e-09   1.139e-09
25- 50  2.054e-08   5.173e-09
50-150  1.040e-07   2.415e-08
15-150  1.281e-07   2.994e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.998       (      )
Norm        : 5.22823       (-5.22823     -5.22823)
------------------------------------------------------------
# Chi-Squared =          78.92 using 59 PHA bins.
# Reduced chi-squared =          1.385 for     57 degrees of freedom 
# Null hypothesis probability =   2.890946e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.416e-08   7.839e-09
25- 50  2.724e-08   1.501e-08
50-150  5.975e-08   3.273e-08
15-150  1.012e-07   5.620e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.9498        (-4.76297      6.14934)
R1^2/D10^2  : 0.160525        (      )
kT2 [keV]   : 91.2887        (-57.5192      -92.9555)
R2^2/D10^2  : 9.39710E-04    (-0.000660394   0.00844727)
------------------------------------------------------------
# Chi-Squared =          47.87 using 59 PHA bins.
# Chi-Squared =          47.37 using 59 PHA bins.
# Reduced chi-squared =         0.8704 for     55 degrees of freedom 
# Reduced chi-squared =         0.8613 for     55 degrees of freedom 
# Null hypothesis probability =   7.411578e-01
# Null hypothesis probability =   7.578704e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.924e-09   4.134e-09
25- 50  2.511e-08   1.438e-08
50-150  1.037e-07   5.340e-08
15-150  1.358e-07   6.925e-08

Peak spectrum fit

Power-law model
Time interval is from    0.040 sec. to    1.040 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.739012     ( -0.270077   0.247766 )
Norm@50keV  : 1.07278E-02    ( -0.00171364   0.00166078 )
------------------------------------------------------------
# Chi-Squared =          49.63 using 59 PHA bins.
# Reduced chi-squared =         0.8707 for     57 degrees of freedom 
# Null hypothesis probability =   7.452335e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.23663 ( -0.184518  0.185853 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.28694e-07 ( -1.82875e-08  1.83229e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.040 sec. to    1.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.640540     ( -1.08102   0.325195 )
Epeak [keV] : 855.799      ( -875.766 -875.766 )
Norm@50keV  : 1.17864E-02    ( -0.00219775   0.0194741 )
------------------------------------------------------------
# Chi-Squared =          49.60 using 59 PHA bins.
# Reduced chi-squared =         0.8857 for     56 degrees of freedom 
# Null hypothesis probability =   7.143376e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.23336 ( -0.18636  0.18712 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.28339e-07 ( 9.297e-09  -1.28339e-07 ) ergs/cm2
 
Band function
Time interval is from    0.040 sec. to    1.040 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.684356   ( 0.684356   0.684356 )
beta        : -0.739013    ( -0.247775   0.270035 )
Epeak [keV] : 21.7313      ( -21.7313 -21.7313 )
Norm@50keV   : 1.44431E-02    ( -0.00527452   0 )
------------------------------------------------------------
# Chi-Squared =          49.63 using 59 PHA bins.
# Reduced chi-squared =         0.9023 for     55 degrees of freedom 
# Null hypothesis probability =   6.793253e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.20908 ( -0.18221  0.16536 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.27305e-07 ( -1.749e-08  1.7353e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 27.7815  (-5.35776  7.91069)
R^2/D10^2   : 2.32653E-02  (-0.0119644   0.0212926)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          57.22 using 59 PHA bins.
# Reduced chi-squared =          1.004 for     57 degrees of freedom 
# Null hypothesis probability =   4.668406e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.941e-09   1.022e-09
25- 50  1.755e-08   4.530e-09
50-150  9.822e-08   2.349e-08
15-150  1.187e-07   2.858e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.998       (      )
Norm        : 5.05647       (-5.05647     -5.05647)
------------------------------------------------------------
# Chi-Squared =          78.91 using 59 PHA bins.
# Reduced chi-squared =          1.384 for     57 degrees of freedom 
# Null hypothesis probability =   2.894457e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.259e-08   6.915e-09
25- 50  2.422e-08   1.352e-08
50-150  5.311e-08   2.882e-08
15-150  8.992e-08   4.856e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.9610        (-4.7154      6.44139)
R1^2/D10^2  : 0.176096        (-0.101089      0.237038)
kT2 [keV]   : 63.6827        (-58.9317      -95.7277)
R2^2/D10^2  : 1.97310E-03    (-0.000725845   0.00778017)
------------------------------------------------------------
# Chi-Squared =          47.22 using 59 PHA bins.
# Reduced chi-squared =         0.8586 for     55 degrees of freedom 
# Null hypothesis probability =   7.628349e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.046e-09   3.555e-09
25- 50  2.215e-08   1.238e-08
50-150  9.638e-08   5.080e-08
15-150  1.246e-07   6.340e-08
Plot creation:
Thu Jul 28 11:08:40 EDT 2011