batgrbproduct Analysis for Trigger=323650

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Sep  4 05:25:30 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger323650/GCN5_download_cron
======================================================================

  Trigger: 00323650      Segment: 000

  BAT Trigger Time: 242160834.476   [s; MET]
      Trigger Stop: 242160834.492   [s; MET]
               UTC: 2008-09-03T18:53:51.406300    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 75.2669524534146   Dec: 45.2611080547911  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    18.91
     Image Trigger?:     NO
     Rate S/N Ratio:     145.251506016289  [ if not an image trigger ]
     Image S/N Ratio:    18.91

  Flight Position:   [ source = BAT ]
    RA: 75.2669524534146   Dec: 45.2611080547911  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 75.2731849618181   Dec: 45.2541680101709  [deg; J2000]  
        { 05h 01m 05.6s , +45d 15' 15.0" }
         +/- 0.927568005994465 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.255735692083452 [arcmin] (formal 1-sigma fit error)
    SNR: 33.8662643262873
 
  Angular difference between Flight and Ground position is 0.492628 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 0.0920000076293945 +/- 0.024331070032646
        Measured from: 8.94069671630859e-08
                   to: 0.0920000970363617     [s; relative to TRIGTIME]
     T50: 0.0360000133514404 +/- 0.00400000810623169
        Measured from: 0.00400006771087646
                   to: 0.0400000810623169     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.436000019311905     
                   to: 0.563999980688095     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00400000810623169     
                   to: 0.127999991178513     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.086847   0.101104   0.038495  -0.001201
           0.004004   0.004141   0.002743   0.001415 [error]
 Peak      0.086682   0.101335   0.038423  -0.001109
           0.004017   0.004158   0.002755   0.001418 [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 3.08e-08 3.13e-08 2.24e-08 2.56e-08 9.46e-08 1.11e-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 Power-law 8.33e-01 6.25e-01 3.13e-01 2.24e-01 1.88e+00 2.00e+00   ph/cm2/s
              Error 7.87e-02 4.43e-02 3.66e-02 4.80e-02 1.32e-01 1.43e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.28e-08 4.18e-08 2.65e-08 3.89e-09 9.46e-08 9.50e-08   erg/cm2
              Error 2.57e-09 2.64e-09 3.00e-09 1.87e-09 5.74e-09 5.95e-09   erg/cm2
Peak flux Cutoff-PL 7.67e-01 7.23e-01 3.02e-01 5.40e-02 1.84e+00 1.85e+00   ph/cm2/s
              Error 8.84e-02 6.57e-02 4.49e-02 4.06e-02 1.33e-01 1.37e-01   ph/cm2/s
 
Fluence        Band 2.28e-08 4.17e-08 2.65e-08 3.90e-09 9.45e-08 9.78e-08   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 5.37e+00 5.50e+00 1.87e+00 1.55e-01 1.29e+01 1.29e+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    2.485    0.000    -      -           7.19e-02 0.00e+00  160.170 57
CPL   0.081    0.545      37.6    2.9      1.40e+00 1.11e+00   55.590 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.999    0.123    -      -           1.25e-02 1.12e-03   76.630 57
CPL   0.836    0.631      40.3    6.3      6.16e-02 6.41e-02   63.820 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.132   -0.004    0.128
T90     0.092    0.000    0.092
T50     0.036    0.004    0.040
Peak    1.000   -0.436    0.564
  • Click here for the BAT GCN circular template

    Image

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

    #   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
       75.2732 +45.2542 0.0057    9.7   49.6       0.2327    33.9  TRIG_00323650       
    ------------------------------------------
     
    Foreground time interval of the image:
     -0.004   0.128 (delta_t =   0.132 [sec])
    Background time interval of the image:
    -239.476  -0.004 (delta_t = 239.472 [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
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.016000
    

    8 ms binning

    From T100_start-3 s to T100_start+3 s
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.016000
    

    2 ms binning

    From T100_start-1 s to T100_start+1 s
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.016000
    

    SN=5 or 10 sec. binning (whichever binning is satisfied first)

    SN=5 or 10 sec. binning (T < 200 sec)

    Flight mask-tagged light curves

    Caution: Mask-weight map is always using the same on-axis map

    Quad-rate summed light curves (from T0-300 to T0+1000)

    Spectra

    Notes:

    Time averaged spectrum fit using the pre-slew DRM

    Power-law model
    Time interval is from   -0.004 sec. to    0.128 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.48538     (     )
    Norm@50keV  : 7.19182E-02    (     )
    ------------------------------------------------------------
    # Chi-Squared =         160.17 using 59 PHA bins.
    # Reduced chi-squared =         2.8101 for     57 degrees of freedom 
    # Null hypothesis probability =   9.694356e-12
     
    Photon flux (15-150 keV)    in 0.132 sec: 14.0015 (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.45652e-08 ( 0  0 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.004 sec. to    0.128 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 8.11006E-02     ( -0.583764   0.506469 )
    Epeak [keV] : 37.5504      ( -3.03684 2.70314 )
    Norm@50keV  : 1.40047    ( -0.658067   1.55429 )
    ------------------------------------------------------------
    # Chi-Squared =          55.59 using 59 PHA bins.
    # Reduced chi-squared =         0.9926 for     56 degrees of freedom 
    # Null hypothesis probability =   4.904100e-01
     
    Photon flux (15-150 keV)    in 0.132 sec: 13.2486 ( -0.8099  0.8134 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.45738e-08 ( -5.71916e-09  5.75164e-09 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.004 sec. to    0.128 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -9.87144E-02   ( -0.508516   0.597896 )
    beta        : -9.99927    ( 4346.87   4356.86 )
    Epeak [keV] : 37.3725      ( -2.87546 2.87507 )
    Norm@50keV   : 1.37915    ( -0.63639   1.58272 )
    ------------------------------------------------------------
    # Chi-Squared =          55.60 using 59 PHA bins.
    # Reduced chi-squared =          1.011 for     55 degrees of freedom 
    # Null hypothesis probability =   4.520116e-01
     
    Photon flux (15-150 keV)    in 0.132 sec: 13.2499 ( -0.8082  0.8076 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.44645e-08 ( -5.69276e-09  5.74332e-09 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 10.0700  (-0.500411  0.519732)
    R^2/D10^2   : 6.59279  (-1.2171   1.49622)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    # Chi-Squared =          73.46 using 59 PHA bins.
    # Reduced chi-squared =          1.289 for     57 degrees of freedom 
    # Null hypothesis probability =   7.007938e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.802e-08   1.445e-09
    25- 50  4.523e-08   2.330e-09
    50-150  2.409e-08   3.142e-09
    15-150  8.734e-08   5.273e-09
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 43.8154       (-4.16851      4.60824)
    Norm        : 88.4311       (-7.55115     8.24499)
    ------------------------------------------------------------
    # Chi-Squared =          76.13 using 59 PHA bins.
    # Reduced chi-squared =          1.336 for     57 degrees of freedom 
    # Null hypothesis probability =   4.604867e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.758e-08   2.033e-09
    25- 50  3.769e-08   2.099e-09
    50-150  3.212e-08   4.349e-09
    15-150  9.739e-08   5.425e-09
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 4.13298        (-1.91664      2.94372)
    R1^2/D10^2  : 83.1107        (-67.7844      2386.3)
    kT2 [keV]   : 11.6535        (-1.22631      2.79509)
    R2^2/D10^2  : 3.16948    (-2.26112   2.28001)
    ------------------------------------------------------------
    # Chi-Squared =          55.14 using 59 PHA bins.
    # Reduced chi-squared =          1.002 for     55 degrees of freedom 
    # Null hypothesis probability =   4.695099e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.365e-08   8.359e-09
    25- 50  4.103e-08   8.224e-09
    50-150  2.921e-08   5.821e-09
    15-150  9.388e-08   1.845e-08
    

    Peak spectrum fit

    Power-law model
    Time interval is from   -0.436 sec. to    0.564 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.99872     ( -0.120672   0.125708 )
    Norm@50keV  : 1.25159E-02    ( -0.00113247   0.00111696 )
    ------------------------------------------------------------
    # Chi-Squared =          76.63 using 59 PHA bins.
    # Reduced chi-squared =          1.344 for     57 degrees of freedom 
    # Null hypothesis probability =   4.245569e-02
     
    Photon flux (15-150 keV)    in 1 sec: 1.87629 ( -0.131849  0.131849 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.15414e-07 ( -9.86065e-09  9.98296e-09 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.436 sec. to    0.564 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.835890     ( -0.674639   0.587865 )
    Epeak [keV] : 40.3343      ( -5.68035 6.8299 )
    Norm@50keV  : 6.16389E-02    ( -0.0338213   0.0944055 )
    ------------------------------------------------------------
    # Chi-Squared =          63.82 using 59 PHA bins.
    # Reduced chi-squared =          1.140 for     56 degrees of freedom 
    # Null hypothesis probability =   2.208671e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.83691 ( -0.13244  0.13275 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.05132e-07 ( -1.00477e-08  1.0625e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.436 sec. to    0.564 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.816836   ( -0.592226   1.12663 )
    beta        : -3.60532    ( 3.56359   1.2167 )
    Epeak [keV] : 40.1395      ( -8.25579 6.51702 )
    Norm@50keV   : 6.35017E-02    ( -0.0200012   0.376845 )
    ------------------------------------------------------------
    # Chi-Squared =          63.68 using 59 PHA bins.
    # Reduced chi-squared =          1.158 for     55 degrees of freedom 
    # Null hypothesis probability =   1.975402e-01
     
    Photon flux (15-150 keV)    in 1 sec: 12.8818 ( -0.7643  0.7802 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 6.92116e-07 ( -3.9455e-08  3.8268e-08 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 9.86546  (-0.738447  0.791018)
    R^2/D10^2   : 0.972881  (-0.250176   0.336548)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    # Chi-Squared =          88.62 using 59 PHA bins.
    # Reduced chi-squared =          1.555 for     57 degrees of freedom 
    # Null hypothesis probability =   4.619909e-03
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.919e-08   2.160e-09
    25- 50  4.681e-08   3.490e-09
    50-150  2.349e-08   4.400e-09
    15-150  8.949e-08   7.310e-09
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 62.8919       (-11.653      15.3551)
    Norm        : 9.81747       (-1.04909     1.10743)
    ------------------------------------------------------------
    # Chi-Squared =          65.54 using 59 PHA bins.
    # Reduced chi-squared =          1.150 for     57 degrees of freedom 
    # Null hypothesis probability =   2.047624e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.485e-08   2.250e-09
    25- 50  3.836e-08   2.760e-09
    50-150  4.536e-08   8.230e-09
    15-150  1.086e-07   9.690e-09
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 4.99686        (-1.42381      1.7006)
    R1^2/D10^2  : 6.86492        (-4.1371      13.7259)
    kT2 [keV]   : 14.1473        (-2.32185      4.36148)
    R2^2/D10^2  : 0.180838    (-0.130039   0.16417)
    ------------------------------------------------------------
    # Chi-Squared =          63.57 using 59 PHA bins.
    # Reduced chi-squared =          1.156 for     55 degrees of freedom 
    # Null hypothesis probability =   2.001758e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.429e-08   1.007e-08
    25- 50  3.956e-08   1.710e-08
    50-150  3.847e-08   2.065e-08
    15-150  1.023e-07   3.921e-08
    

    Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

    Power-law model
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.48538     (     )
    Norm@50keV  : 7.19182E-02    (     )
    ------------------------------------------------------------
    # Chi-Squared =         160.17 using 59 PHA bins.
    # Reduced chi-squared =         2.8101 for     57 degrees of freedom 
    # Null hypothesis probability =   9.694356e-12
     
    Photon flux (15-150 keV)    in 0.132 sec: 14.0015 (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.45652e-08 ( 0  0 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 8.11006E-02     ( -0.583764   0.506469 )
    Epeak [keV] : 37.5504      ( -3.03684 2.70314 )
    Norm@50keV  : 1.40047    ( -0.658067   1.55429 )
    ------------------------------------------------------------
    # Chi-Squared =          55.59 using 59 PHA bins.
    # Reduced chi-squared =         0.9926 for     56 degrees of freedom 
    # Null hypothesis probability =   4.904100e-01
     
    Photon flux (15-150 keV)    in 0.132 sec: 13.2486 ( -0.8099  0.8134 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.45738e-08 ( -5.71916e-09  5.75164e-09 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -9.87144E-02   ( -0.508516   0.597896 )
    beta        : -9.99927    ( 4346.87   4356.86 )
    Epeak [keV] : 37.3725      ( -2.87546 2.87507 )
    Norm@50keV   : 1.37915    ( -0.63639   1.58272 )
    ------------------------------------------------------------
    # Chi-Squared =          55.60 using 59 PHA bins.
    # Reduced chi-squared =          1.011 for     55 degrees of freedom 
    # Null hypothesis probability =   4.520116e-01
     
    Photon flux (15-150 keV)    in 0.132 sec: 13.2499 ( -0.8082  0.8076 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.44645e-08 ( -5.69276e-09  5.74332e-09 ) ergs/cm2
     
    

    S(25-50 keV) vs. S(50-100 keV) plot

    S(25-50 keV)  = 3.13326e-08
    S(50-100 keV) = 2.24046e-08
    

    T90 vs. Hardness ratio plot

    T90                                   = 0.0920000076293945 sec.
    Hardness ratio (energy fluence ratio) = 0.715057
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.16416
    Count Ratio (50-100 keV) / (15-25 keV) = 0.443251
    

    Mask shadow pattern

    IMX = 0, IMY = 0
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.016000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.016000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.016000
    

    Spacecraft aspect plot

    Bright source in the pre-burst/pre-slew/post-slew images

    Pre-burst image of 15-350 keV band

    Time interval of the image:
    -239.476000 -0.004000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6506  22.0180    0.2  29.4   -0.5  10.1670  48.3    1.0	Crab                          
     41.7596  28.2614    2.6  40.6   66.7   3.0744   4.4 ------	UNKNOWN                       
     74.6556  35.5316    3.1  18.0   27.2   0.6953   3.7 ------	UNKNOWN                       
     84.2787  24.4201    2.6  27.0   -1.3   0.9477   4.4 ------	UNKNOWN                       
    243.1842  69.1058    2.7  58.3 -176.7   5.3552   4.2 ------	UNKNOWN                       
    235.4941  69.2107    2.5  57.3 -173.7   5.0399   4.6 ------	UNKNOWN                       
    

    Pre-slew background subtracted image of 15-350 keV band

    Time interval of the image:
    -0.004000 0.128000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6854  22.1385    5.0  29.3   -0.5  -0.0199  -2.3    8.0	Crab                          
     37.8386  32.8740    2.6  39.8   75.4   0.1298   4.4 ------	UNKNOWN                       
     75.2732  45.2542    0.3   9.7   49.6   0.2327  33.8 ------	UNKNOWN                       
     93.9654  23.3951    1.8  28.5  -20.3   0.0446   6.4 ------	UNKNOWN                       
    144.9532  41.6702    2.6  40.1 -106.0   0.1057   4.4 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    37.424600 962.640000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6318  22.0166    0.1  24.2  -15.5  38.8930  80.8    0.1	Crab                          
     38.6955  22.9090    2.4  37.1   69.1   6.4607   4.8 ------	UNKNOWN                       
     60.4439  62.0772    2.5  18.9  161.9   2.1241   4.7 ------	UNKNOWN                       
    
    Plot creation:
    Wed Feb 17 12:08:32 EST 2010