batgrbproduct Analysis for Trigger=511235

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jan 13 07:22:04 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger511235
======================================================================

  Trigger: 00511235      Segment: 000

  BAT Trigger Time: 347552192   [s; MET]
      Trigger Stop: 347552193.024   [s; MET]
               UTC: 2012-01-06T14:16:24.245280    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 66.1293574039097   Dec: 64.0284749529581  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.96
     Image Trigger?:     NO
     Rate S/N Ratio:     19.6214168703486  [ if not an image trigger ]
     Image S/N Ratio:    8.96

  Flight Position:   [ source = BAT ]
    RA: 66.1293574039097   Dec: 64.0284749529581  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 66.1304831988789   Dec: 64.0489374820552  [deg; J2000]  
        { 04h 24m 31.3s , +64d 02' 56.2" }
         +/- 1.26731162392981 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.448335766301229 [arcmin] (formal 1-sigma fit error)
    SNR: 21.6841332885148
 
  Angular difference between Flight and Ground position is 1.228108 arcmin
 
  Partial Coding Fraction: 0.75    [ including projection effects ]

  Duration
     T90: 63.4999999403954 +/- 4.62083798710118
        Measured from: -5.34399998188019
                   to: 58.1559999585152     [s; relative to TRIGTIME]
     T50: 9.51999992132187 +/- 43.2384739832969
        Measured from: -2.4879999756813
                   to: 7.03199994564056     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.459999978542328     
                   to: 1.45999997854233     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.283999979496     
                   to: 62.6399999856949     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.472285   0.581447   0.480925   0.099955
           0.050663   0.052289   0.046489   0.041130 [error]
 Peak      0.048908   0.063264   0.061575   0.018593
           0.007194   0.007648   0.007427   0.005668 [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 1.37e-07 2.48e-07 3.45e-07 9.96e-07 9.91e-07 1.73e-06   erg/cm2
              Error 2.14e-08 2.41e-08 4.51e-08 2.76e-07 1.08e-07 3.14e-07   erg/cm2
Peak flux Power-law 4.39e-01 4.87e-01 3.86e-01 5.05e-01 1.50e+00 1.82e+00   ph/cm2/s
              Error 9.26e-02 6.45e-02 5.69e-02 1.52e-01 1.84e-01 2.30e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.34e-07 2.55e-07 3.48e-07 6.95e-07 9.72e-07 1.43e-06   erg/cm2
              Error 2.40e-08 2.95e-08 4.72e-08 4.97e-07 1.21e-07 5.28e-07   erg/cm2
Peak flux Cutoff-PL 3.81e-01 5.16e-01 4.15e-01 2.61e-01 1.46e+00 1.57e+00   ph/cm2/s
              Error 1.15e-01 7.63e-02 6.92e-02 2.47e-01 1.90e-01 3.04e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 3.91e-01 5.09e-01 4.11e-01 3.09e-01 1.48e+00 1.64e+00   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.527    0.167    -      -           1.52e-03 1.50e-04   54.390 57
CPL   1.316    0.509     154.3    0.0      1.97e-03 1.53e-03   54.020 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.337    0.202    -      -           1.25e-02 1.52e-03   37.580 57
CPL   0.644    0.901     103.6  -34.5      2.70e-02 3.50e-02   35.590 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: 9.920000 sec.
T50 in the 50-300 keV band: 4.288000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   68.924   -6.284   62.640
T90    63.500   -5.344   58.156
T50     9.520   -2.488    7.032
Peak    1.000    0.460    1.460
  • Click here for the BAT GCN circular template

    Image

    Pre-slew 15.0-350.0 keV image (Event data)

    #   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
       66.1305    64.0489   0.0089    28.9334    16.1265         1.3642821     21.684 TRIG_00511235                 
     
    Foreground time interval of the image:
     -6.284  12.301 (delta_t =  18.585 [sec])
    Background time interval of the image:
    -748.599 -731.865 (delta_t =  16.734 [sec])
    -239.000 -34.849 (delta_t = 204.151 [sec])
    -34.000  -6.284 (delta_t =  27.716 [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 1.024000
    

    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 1.024000
    

    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 1.024000
    

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

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

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

    The mask-weighted light curves based on cleaned DPHs

    Spectral Evolution

    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from   -6.284 sec. to   62.640 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.52732     ( -0.165795   0.167349 )
    Norm@50keV  : 1.52209E-03    ( -0.000151025   0.000149772 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.39 using 59 PHA bins.
    # Reduced chi-squared =         0.9543 for     57 degrees of freedom 
    # Null hypothesis probability =   5.734797e-01
     
    Photon flux (15-150 keV)    in 68.92 sec: 0.191447 ( -0.0182203  0.0182342 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.90877e-07 ( -1.07548e-07  1.08847e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -6.284 sec. to   62.640 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.31581     ( -0.659743   0.358554 )
    Epeak [keV] : 154.316      ( -154.334 -154.334 )
    Norm@50keV  : 1.96894E-03    ( -0.000729848   0.00233694 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.02 using 59 PHA bins.
    # Reduced chi-squared =         0.9647 for     56 degrees of freedom 
    # Null hypothesis probability =   5.501570e-01
     
    Photon flux (15-150 keV)    in 68.92 sec: 0.189741 ( -0.018825  0.018796 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.71848e-07 ( -1.2101e-07  1.20327e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from   -6.284 sec. to   62.640 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.93702   ( -13.8377   -4.93702 )
    beta        : -1.65982    ( -0.24139   0.198445 )
    Epeak [keV] : 25.3158      ( -6.19266 4.22044 )
    Norm@50keV   : 141.433    ( -13.2045   752.945 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.95 using 59 PHA bins.
    # Reduced chi-squared =         0.9264 for     55 degrees of freedom 
    # Null hypothesis probability =   6.300284e-01
     
    Photon flux (15-150 keV)    in 68.92 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 14.0350  (-1.80186  2.10926)
    R^2/D10^2   : 2.67819E-02  (-0.0103949   0.0168666)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          83.87 using 59 PHA bins.
    # Reduced chi-squared =          1.471 for     57 degrees of freedom 
    # Null hypothesis probability =   1.179265e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.678e-08   1.324e-08
    25- 50  2.863e-07   3.894e-08
    50-150  3.718e-07   8.436e-08
    15-150  7.349e-07   9.918e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 199.329       (-72.7754      -199.344)
    Norm        : 0.780451       (-0.0732821     0.0733539)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.06 using 59 PHA bins.
    # Reduced chi-squared =         0.9485 for     57 degrees of freedom 
    # Null hypothesis probability =   5.859971e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.339e-07   4.494e-08
    25- 50  2.577e-07   7.602e-08
    50-150  5.650e-07   2.999e-07
    15-150  9.566e-07   3.933e-07
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 6.48690        (-1.40826      1.80073)
    R1^2/D10^2  : 0.278349        (-0.156908      0.396331)
    kT2 [keV]   : 26.1651        (-6.02892      12.4063)
    R2^2/D10^2  : 2.43581E-03    (-0.00175439   0.00378911)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          51.28 using 59 PHA bins.
    # Reduced chi-squared =         0.9323 for     55 degrees of freedom 
    # Null hypothesis probability =   6.175733e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.385e-07   5.671e-08
    25- 50  2.530e-07   8.208e-08
    50-150  5.868e-07   2.980e-07
    15-150  9.783e-07   3.701e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from    0.460 sec. to    1.460 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.33705     ( -0.200885   0.202973 )
    Norm@50keV  : 1.24783E-02    ( -0.00152589   0.0015219 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          37.58 using 59 PHA bins.
    # Reduced chi-squared =         0.6593 for     57 degrees of freedom 
    # Null hypothesis probability =   9.780491e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.49933 ( -0.183847  0.184042 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.22231e-07 ( -1.66277e-08  1.67798e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.460 sec. to    1.460 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.644469     ( -1.02836   0.772776 )
    Epeak [keV] : 103.628      ( -34.71 -103.627 )
    Norm@50keV  : 2.70038E-02    ( -0.0152669   0.0546578 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          35.59 using 59 PHA bins.
    # Reduced chi-squared =         0.6355 for     56 degrees of freedom 
    # Null hypothesis probability =   9.848147e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.46375 ( -0.19024  0.18949 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.18022e-07 ( -1.7803e-08  1.7771e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.460 sec. to    1.460 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.645371   ( -0.548016   0.895865 )
    beta        : -10.0000    ( 10   0 )
    Epeak [keV] : 103.679      ( -27.8412 635.652 )
    Norm@50keV   : 2.69767E-02    ( -0.0152323   0.0546554 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          35.59 using 59 PHA bins.
    # Reduced chi-squared =         0.6471 for     55 degrees of freedom 
    # Null hypothesis probability =   9.804324e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.47641 (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.20081e-07 ( 0  0 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 17.0209  (-2.31854  2.75694)
    R^2/D10^2   : 0.118226  (-0.0471958   0.0756749)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          44.22 using 59 PHA bins.
    # Reduced chi-squared =         0.7758 for     57 degrees of freedom 
    # Null hypothesis probability =   8.918671e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  6.973e-09   1.560e-09
    25- 50  3.088e-08   5.315e-09
    50-150  6.391e-08   1.596e-08
    15-150  1.018e-07   1.657e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (      )
    Norm        : 6.18996       (-0.751505     0.751463)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          39.56 using 59 PHA bins.
    # Reduced chi-squared =         0.6940 for     57 degrees of freedom 
    # Null hypothesis probability =   9.619415e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.541e-08   8.625e-09
    25- 50  2.965e-08   1.622e-08
    50-150  6.503e-08   3.561e-08
    15-150  1.101e-07   6.105e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 4.09111        (-2.15156      8.8888)
    R1^2/D10^2  : 7.91284        (-7.61095      583.771)
    kT2 [keV]   : 20.1624        (-3.59024      25.7466)
    R2^2/D10^2  : 6.15988E-02    (-0.058828   0.0456894)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          35.73 using 59 PHA bins.
    # Reduced chi-squared =         0.6497 for     55 degrees of freedom 
    # Null hypothesis probability =   9.795526e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.283e-08   6.020e-09
    25- 50  2.718e-08   7.835e-09
    50-150  7.274e-08   2.145e-08
    15-150  1.128e-07   3.673e-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: 1.49694     ( -0.121371   0.121907 )
    Norm@50keV  : 4.73300E-03    ( -0.000333521   0.000332212 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          62.09 using 59 PHA bins.
    # Reduced chi-squared =          1.089 for     57 degrees of freedom 
    # Null hypothesis probability =   2.996136e-01
     
    Photon flux (15-150 keV)    in 18.58 sec: 0.590379 ( -0.0412445  0.0412904 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.34649e-07 ( -6.45523e-08  6.5033e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.27234     ( -0.491643   0.28905 )
    Epeak [keV] : 159.971      ( -159.983 -159.983 )
    Norm@50keV  : 6.16874E-03    ( -0.00170533   0.00467156 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          61.36 using 59 PHA bins.
    # Reduced chi-squared =          1.096 for     56 degrees of freedom 
    # Null hypothesis probability =   2.898588e-01
     
    Photon flux (15-150 keV)    in 18.58 sec: 0.584254 ( -0.043003  0.042937 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.1935e-07 ( -7.21889e-08  7.1821e-08 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.99887   ( -14.9911   -4.99887 )
    beta        : -1.57510    ( -0.142456   0.136855 )
    Epeak [keV] : 23.9421      ( -5.3916 3.72245 )
    Norm@50keV   : 657.266    ( -44.6856   2605.48 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.51 using 59 PHA bins.
    # Reduced chi-squared =          1.064 for     55 degrees of freedom 
    # Null hypothesis probability =   3.477822e-01
     
    Photon flux (15-150 keV)    in 18.58 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    

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

    S(25-50 keV)  = 2.48e-07
    S(50-100 keV) = 3.45e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 63.4999999403954 sec.
    Hardness ratio (energy fluence ratio) = 1.39113
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.23114
    Count Ratio (50-100 keV) / (15-25 keV) = 1.01829
    

    Mask shadow pattern

    IMX = 5.310376570901550E-01, IMY = -1.535421415736369E-01
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 1.024000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 1.024000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 1.024000
    

    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:
    -748.599400 -731.865300
    -239.000000 -34.849300
    -34.000000 -6.284000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6541  22.0091    1.1  39.5   97.1   9.0544  10.6    1.2	Crab                          
     10.0686  32.8341    2.2  26.2  -99.5   1.3737   5.3 ------	UNKNOWN                       
     11.1388  27.5550    3.6  27.8 -110.8   0.8704   3.2 ------	UNKNOWN                       
      2.1397  34.5024    2.6  31.8  -91.4   1.4079   4.4 ------	UNKNOWN                       
      7.1489   0.5215    3.6  49.7 -137.9   2.6740   3.2  430.1	UNKNOWN                       
    328.9875  57.8448    2.6  49.1  -48.1   4.7145   4.4 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -6.284000 12.300600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.4574  21.9643    3.5  39.4   97.3   0.6370   3.3   10.2	Crab                          
    104.4571  77.6952    2.2  46.4    9.3   0.5453   5.2 ------	UNKNOWN                       
     66.1305  64.0489    0.5  28.9   16.1   1.3643  21.7 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    63.900600 963.099000
    1257.000000 1409.160000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    194.9918  76.3282    3.1  36.0  -18.9   2.6304   3.7 ------	UNKNOWN                       
     19.7459  30.6801    3.9  44.1 -153.6   3.1854   3.0 ------	UNKNOWN                       
    336.3593  57.2295    4.7  40.8  -93.1   8.9075   2.5 ------	UNKNOWN                       
    
    Plot creation:
    Sat May 30 20:42:53 EDT 2015