batgrbproduct Analysis for Trigger=317662

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Thu Aug  6 04:52:52 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/317662
======================================================================

  Trigger: 00317662      Segment: 000

  BAT Trigger Time: 238479567.36   [s; MET]
      Trigger Stop: 238479568.384   [s; MET]
               UTC: 2008-07-23T04:19:24.398120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 274.512361086236   Dec: -6.92252284367775  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.42
     Image Trigger?:     NO
     Rate S/N Ratio:     18.0554700852678  [ if not an image trigger ]
     Image S/N Ratio:    8.42

  Flight Position:   [ source = BAT ]
    RA: 274.512361086236   Dec: -6.92252284367775  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 274.464617586536   Dec: -6.90858110057763  [deg; J2000]  
        { 18h 17m 51.5s , -06d 54' 30.9" }
         +/- 1.6259314025759 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.555951762849259 [arcmin] (formal 1-sigma fit error)
    SNR: 15.1895106079697
 
  Angular difference between Flight and Ground position is 2.964247 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 17.9120000004768 +/- 1.93204556098818
        Measured from: 0.0439999997615814
                   to: 17.9560000002384     [s; relative to TRIGTIME]
     T50: 11.944000005722 +/- 2.29455179920174
        Measured from: 1.38799998164177
                   to: 13.3319999873638     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.120000004768372     
                   to: 0.879999995231628     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.232000023126602     
                   to: 19.1679999828339     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.179917   0.298734   0.120425   0.058075
           0.026099   0.024470   0.020989   0.018025 [error]
 Peak      0.029134   0.056572   0.027514   0.010447
           0.006155   0.006072   0.005321   0.004374 [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 5.82e-08 9.46e-08 1.16e-07 2.83e-07 3.49e-07 5.52e-07   erg/cm2
              Error 1.04e-08 1.07e-08 2.00e-08 1.01e-07 4.68e-08 1.19e-07   erg/cm2
Peak flux Power-law 3.10e-01 3.11e-01 2.19e-01 2.45e-01 9.37e-01 1.09e+00   ph/cm2/s
              Error 7.10e-02 4.61e-02 4.15e-02 9.21e-02 1.35e-01 1.61e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.73e-08 9.67e-08 1.16e-07 2.02e-07 3.42e-07 4.72e-07   erg/cm2
              Error 1.11e-08 1.37e-08 2.13e-08 1.95e-07 5.64e-08 1.88e-07   erg/cm2
Peak flux Cutoff-PL 2.64e-01 3.59e-01 2.21e-01 5.55e-02 8.89e-01 9.00e-01   ph/cm2/s
              Error 8.24e-02 6.71e-02 5.40e-02 1.42e-01 1.67e-01 0.00e+00   ph/cm2/s
 
Fluence        Band 5.30e-08 1.07e-07 1.06e-07 1.76e-07 3.26e-07 4.46e-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 2.37e-01 3.90e-01 2.04e-01 1.28e-01 8.93e-01 9.69e-01   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    1.701    0.208    -      -           1.95e-03 2.45e-04   82.570 57
CPL   1.530    0.666     119.2    0.0      2.43e-03 0.00e+00   82.440 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.505    0.239    -      -           7.50e-03 1.13e-03   53.650 57
CPL   0.164    1.498      60.3   72.0      4.15e-02 2.19e-01   49.950 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: 2.816000 sec.
T50 in the 50-300 keV band: 1.088000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   19.400   -0.232   19.168
T90    17.912    0.044   17.956
T50    11.944    1.388   13.332
Peak    1.000   -0.120    0.880

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  274.4646  -6.9086 0.0126    7.2    6.5       0.6673    15.2  TRIG_00317662       
------------------------------------------
 
Foreground time interval of the image:
 -0.232  18.341 (delta_t =  18.573 [sec])
Background time interval of the image:
-239.360  -0.232 (delta_t = 239.128 [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   -0.232 sec. to   19.168 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70080     ( -0.205485   0.210181 )
Norm@50keV  : 1.94586E-03    ( -0.000247364   0.000243112 )
------------------------------------------------------------
# Chi-Squared =          82.57 using 59 PHA bins.
# Reduced chi-squared =          1.449 for     57 degrees of freedom 
# Null hypothesis probability =   1.503374e-02
 
Photon flux (15-150 keV)    in 19.4 sec: 0.258504 ( -0.029392  0.0294145 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.49497e-07 ( -4.62944e-08  4.72448e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.232 sec. to   19.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52956     ( -0.959095   0.373579 )
Epeak [keV] : 119.228      (   )
Norm@50keV  : 2.43177E-03    (     )
------------------------------------------------------------
# Chi-Squared =          82.44 using 59 PHA bins.
# Reduced chi-squared =          1.472 for     56 degrees of freedom 
# Null hypothesis probability =   1.229782e-02
 
Photon flux (15-150 keV)    in 19.4 sec: 0.256438 ( -0.030885  0.030552 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.42051e-07 ( -5.93252e-08  5.34839e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.232 sec. to   19.168 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.47165   ( -2.71443   -1.4471 )
beta        : -2.13970    ( -0.587349   0.422178 )
Epeak [keV] : 35.6314      ( -9.39164 26.1625 )
Norm@50keV   : 0.223271    ( -0.199452   33.4401 )
------------------------------------------------------------
# Chi-Squared =          78.43 using 59 PHA bins.
# Reduced chi-squared =          1.426 for     55 degrees of freedom 
# Null hypothesis probability =   2.070034e-02
 
Photon flux (15-150 keV)    in 19.4 sec: 0.251016 ( -0.033758  0.028119 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.25879e-07 ( -5.34295e-08  4.84185e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.2633  (-1.23247  1.53426)
R^2/D10^2   : 0.110471  (-0.0454646   0.0697228)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          94.98 using 59 PHA bins.
# Reduced chi-squared =          1.666 for     57 degrees of freedom 
# Null hypothesis probability =   1.186820e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.636e-08   9.564e-09
25- 50  1.195e-07   1.838e-08
50-150  6.722e-08   1.919e-08
15-150  2.331e-07   3.383e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 119.990       (-26.3206      -100.327)
Norm        : 1.10385       (-0.152578     0.197108)
------------------------------------------------------------
# Chi-Squared =          82.57 using 59 PHA bins.
# Reduced chi-squared =          1.449 for     57 degrees of freedom 
# Null hypothesis probability =   1.503925e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.578e-08   9.525e-09
25- 50  9.979e-08   1.320e-08
50-150  1.781e-07   3.236e-08
15-150  3.336e-07   4.326e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.17026        (-1.21869      1.33178)
R1^2/D10^2  : 0.221293        (-0.0934067      0.168652)
kT2 [keV]   : 52.2109        (-24.0353      -52.3644)
R2^2/D10^2  : 3.33560E-04    (-0.000307566   0.000878059)
------------------------------------------------------------
# Chi-Squared =          73.11 using 59 PHA bins.
# Reduced chi-squared =          1.329 for     55 degrees of freedom 
# Null hypothesis probability =   5.169782e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.448e-08   1.635e-08
25- 50  1.091e-07   3.410e-08
50-150  1.999e-07   9.813e-08
15-150  3.634e-07   1.435e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.120 sec. to    0.880 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50453     ( -0.237528   0.241008 )
Norm@50keV  : 7.49529E-03    ( -0.00113532   0.00112401 )
------------------------------------------------------------
# Chi-Squared =          53.65 using 59 PHA bins.
# Reduced chi-squared =         0.9412 for     57 degrees of freedom 
# Null hypothesis probability =   6.015383e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.936849 ( -0.134777  0.134876 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.10525e-08 ( -1.16996e-08  1.19512e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.120 sec. to    0.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.164435     ( -1.79427   1.20137 )
Epeak [keV] : 60.3009      ( -14.8542 129.194 )
Norm@50keV  : 4.14509E-02    ( -0.0414806   0.39577 )
------------------------------------------------------------
# Chi-Squared =          49.95 using 59 PHA bins.
# Reduced chi-squared =         0.8920 for     56 degrees of freedom 
# Null hypothesis probability =   7.018854e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.888621 ( -0.142418  0.142279 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.15395e-08 ( 1.46361e-08  -6.15395e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.120 sec. to    0.880 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.43226   ( -2.2027   -1.54952 )
beta        : -2.17075    ( -1.64907   0.549998 )
Epeak [keV] : 40.1703      ( -11.6474 27.3706 )
Norm@50keV   : 1.96387    ( -1.83958   51.3602 )
------------------------------------------------------------
# Chi-Squared =          47.18 using 59 PHA bins.
# Reduced chi-squared =         0.8578 for     55 degrees of freedom 
# Null hypothesis probability =   7.642219e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.893203 ( -0.140231  0.132487 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.3023e-08 ( -1.0141e-08  1.44548e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.6282  (-1.85697  2.33147)
R^2/D10^2   : 0.200804  (-0.0919055   0.155958)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          52.70 using 59 PHA bins.
# Reduced chi-squared =         0.9246 for     57 degrees of freedom 
# Null hypothesis probability =   6.368801e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.791e-09   1.602e-09
25- 50  2.266e-08   4.515e-09
50-150  2.245e-08   7.315e-09
15-150  5.190e-08   1.126e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 192.628       (-13.7954      -110.899)
Norm        : 3.85087       (-0.550621     0.566768)
------------------------------------------------------------
# Chi-Squared =          52.07 using 59 PHA bins.
# Reduced chi-squared =         0.9134 for     57 degrees of freedom 
# Null hypothesis probability =   6.602599e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.632e-09   5.275e-09
25- 50  1.845e-08   1.017e-08
50-150  4.001e-08   2.199e-08
15-150  6.809e-08   3.774e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.8421        (-1.5612      2.92381)
R1^2/D10^2  : 0.313783        (-0.187535      0.515907)
kT2 [keV]   : 197.356        (      )
R2^2/D10^2  : 8.64386E-05    (-5.4401e-05   0.0457788)
------------------------------------------------------------
# Chi-Squared =          47.17 using 59 PHA bins.
# Chi-Squared =          47.06 using 59 PHA bins.
# Reduced chi-squared =         0.8576 for     55 degrees of freedom 
# Reduced chi-squared =         0.8556 for     55 degrees of freedom 
# Null hypothesis probability =   7.645184e-01
# Null hypothesis probability =   7.681087e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.107e-09   4.170e-09
25- 50  2.182e-08   1.128e-08
50-150  3.735e-08   1.868e-08
15-150  6.728e-08   3.001e-08
Plot creation:
Thu Jul 28 15:03:47 EDT 2011