batgrbproduct analysis for trigger=286373

batgrbproduct Analysis for Trigger=286373

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jan 20 08:12:14 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger286373
======================================================================

  Trigger: 00286373      Segment: 000

  BAT Trigger Time: 207361556.032   [s; MET]
      Trigger Stop: 207361557.056   [s; MET]
               UTC: 2007-07-29T00:25:53.913580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 56.3223396303976   Dec: -39.3118189788734  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.09
     Image Trigger?:     NO
     Rate S/N Ratio:     21.4941852602047  [ if not an image trigger ]
     Image S/N Ratio:    7.09

  Flight Position:   [ source = BAT ]
    RA: 56.3223396303976   Dec: -39.3118189788734  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 56.2907674977778   Dec: -39.3300297545073  [deg; J2000]  
        { 03h 45m 09.8s , -39d 19' 48.1" }
         +/- 2.10886229460735 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.858033151566055 [arcmin] (formal 1-sigma fit error)
    SNR: 10.4759242315503
 
  Angular difference between Flight and Ground position is 1.827970 arcmin
 
  Partial Coding Fraction: 0.65625    [ including projection effects ]

  Duration
     T90: 0.98800003528595 +/- 0.166901148041195
        Measured from: 0.0199999809265137
                   to: 1.00800001621246     [s; relative to TRIGTIME]
     T50: 0.564000010490417 +/- 0.129799827930591
        Measured from: 0.211999982595444
                   to: 0.775999993085861     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0279999971389771     
                   to: 1.02799999713898     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0680000185966492     
                   to: 1.07600000500679     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.024224   0.039841   0.051912   0.023728
           0.006394   0.007082   0.006828   0.006090 [error]
 Peak      0.018106   0.038134   0.047996   0.024588
           0.006016   0.006703   0.006493   0.005763 [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 6.61e-09 1.77e-08 3.81e-08 2.14e-07 1.03e-07 2.77e-07   erg/cm2
              Error 2.20e-09 3.54e-09 6.16e-09 8.17e-08 1.66e-08 8.40e-08   erg/cm2
Peak flux Power-law 1.77e-01 2.70e-01 3.10e-01 6.80e-01 9.59e-01 1.44e+00   ph/cm2/s
              Error 6.36e-02 5.98e-02 4.89e-02 2.37e-01 1.57e-01 2.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.67e-09 1.82e-08 4.06e-08 1.09e-07 1.00e-07 1.74e-07   erg/cm2
              Error 2.79e-09 3.94e-09 7.95e-09 1.20e-07 1.78e-08 1.08e-07   erg/cm2
Peak flux Cutoff-PL 1.48e-01 2.76e-01 3.33e-01 4.01e-01 9.39e-01 1.16e+00   ph/cm2/s
              Error 7.93e-02 6.52e-02 6.60e-02 -------- 1.22e-01 2.92e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   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    0.890    0.272    -      -           7.98e-03 1.27e-03   58.340 57
CPL   0.322    1.106     174.6    0.0      1.40e-02 2.53e-02   57.630 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.802    0.281    -      -           8.34e-03 1.40e-03   57.380 57
CPL   0.210    1.167     181.9    0.0      1.49e-02 2.65e-02   56.640 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: 0.768000 sec.
T50 in the 50-300 keV band: 0.448000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    1.144   -0.068    1.076
T90     0.988    0.020    1.008
T50     0.564    0.212    0.776
Peak    1.000    0.028    1.028

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
   56.2908   -39.3300   0.0183    34.3692     2.3927         0.1398151     10.476 TRIG_00286373                 
 
Foreground time interval of the image:
 -0.068   1.076 (delta_t =   1.144 [sec])
Background time interval of the image:
-239.032  -0.068 (delta_t = 238.964 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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)

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

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from   -0.068 sec. to    1.076 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.890379     ( -0.280981   0.263454 )
Norm@50keV  : 7.97894E-03    ( -0.00128425   0.00126532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.34 using 59 PHA bins.
# Reduced chi-squared =          1.023 for     57 degrees of freedom 
# Null hypothesis probability =   4.260419e-01
 
Photon flux (15-150 keV)    in 1.144 sec: 0.915751 ( -0.145921  0.146725 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02827e-07 ( -1.65446e-08  1.66356e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.068 sec. to    1.076 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.321639     ( -1.51724   0.693964 )
Epeak [keV] : 174.617      ( -174.617 -174.617 )
Norm@50keV  : 1.40196E-02    ( -0.00704796   0.043538 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.63 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     56 degrees of freedom 
# Null hypothesis probability =   4.147648e-01
 
Photon flux (15-150 keV)    in 1.144 sec: 0.895506 ( -0.152747  0.152354 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00417e-07 ( -1.80515e-08  1.75389e-08 ) ergs/cm2

Band function

Time interval is from   -0.068 sec. to    1.076 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -4.99999   -4.99999 )
beta        : -0.934065    ( -0.296794   0.298276 )
Epeak [keV] : 27.3005      ( -27.3002 17.2935 )
Norm@50keV   : 296.976    ( -44.924   1.47292e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.89 using 59 PHA bins.
# Reduced chi-squared =          1.053 for     55 degrees of freedom 
# Null hypothesis probability =   3.690523e-01
 
Photon flux (15-150 keV)    in 1.144 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]    : 23.2961  (-4.21762  5.94913)
R^2/D10^2   : 2.83895E-02  (-0.0142914   0.025078)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.97 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     57 degrees of freedom 
# Null hypothesis probability =   3.351839e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.174e-09   1.098e-09
25- 50  1.735e-08   4.781e-09
50-150  7.028e-08   1.869e-08
15-150  9.080e-08   2.285e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 3.73207       (-0.609981     0.609907)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.71 using 59 PHA bins.
# Reduced chi-squared =          1.311 for     57 degrees of freedom 
# Null hypothesis probability =   5.782378e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.063e-08   6.080e-09
25- 50  2.045e-08   1.182e-08
50-150  4.485e-08   2.588e-08
15-150  7.593e-08   4.331e-08

Double BB

------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.71 using 59 PHA bins.
#Fit statistic : Chi-Squared =          57.91 using 59 PHA bins.
#Fit statistic : Chi-Squared =          57.16 using 59 PHA bins.
#Fit statistic : Chi-Squared =          57.11 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     55 degrees of freedom 
# Reduced chi-squared =          1.053 for     55 degrees of freedom 
# Reduced chi-squared =          1.039 for     55 degrees of freedom 
# Reduced chi-squared =          1.038 for     55 degrees of freedom 
# Null hypothesis probability =   3.411242e-01
# Null hypothesis probability =   3.683237e-01
# Null hypothesis probability =   3.949751e-01
# Null hypothesis probability =   3.966834e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.950e-09   3.402e-09
25- 50  1.686e-08   6.437e-09
50-150  7.408e-08   3.730e-08
15-150  9.689e-08   4.470e-08

Peak spectrum fit

Power-law model

Time interval is from    0.028 sec. to    1.028 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.802175     ( -0.2916   0.269559 )
Norm@50keV  : 8.34414E-03    ( -0.00141601   0.00138512 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.38 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     57 degrees of freedom 
# Null hypothesis probability =   4.609700e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.958928 ( -0.156611  0.157688 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.74193e-08 ( -1.57822e-08  1.58595e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.028 sec. to    1.028 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.210092     ( -1.52541   0.80817 )
Epeak [keV] : 181.886      ( -181.886 -181.886 )
Norm@50keV  : 1.48516E-02    ( -0.00760229   0.0453767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.64 using 59 PHA bins.
# Reduced chi-squared =          1.011 for     56 degrees of freedom 
# Null hypothesis probability =   4.510627e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.938602 ( -0.081747  0.162568 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.52561e-08 ( -1.71965e-08  1.66529e-08 ) ergs/cm2

Band function

Time interval is from    0.028 sec. to    1.028 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -0.807734    ( -0.271513   0.293279 )
Epeak [keV] : 19.9762      ( -19.3699 -19.3699 )
Norm@50keV   : 1697.34    ( -260.988   1.37029e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.34 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     55 degrees of freedom 
# Null hypothesis probability =   3.884184e-01
 
Photon flux (15-150 keV)    in 1 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]    : 24.7031  (-4.71803  6.87095)
R^2/D10^2   : 2.53881E-02  (-0.013228   0.0236978)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.68 using 59 PHA bins.
# Reduced chi-squared =          1.047 for     57 degrees of freedom 
# Null hypothesis probability =   3.786506e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.708e-09   9.310e-10
25- 50  1.527e-08   4.744e-09
50-150  6.922e-08   2.108e-08
15-150  8.719e-08   2.117e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 3.87443       (-0.658894     0.658857)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.51 using 59 PHA bins.
# Reduced chi-squared =          1.360 for     57 degrees of freedom 
# Null hypothesis probability =   3.673398e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.650e-09   5.625e-09
25- 50  1.856e-08   1.066e-08
50-150  4.071e-08   2.297e-08
15-150  6.893e-08   3.945e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 16.2416        (-10.2569      7.97141)
R1^2/D10^2  : 6.82577E-02        (-0.0466154      0.339302)
kT2 [keV]   : 199.387        (      )
R2^2/D10^2  : 1.60640E-04    (-0.000115787   0.0121072)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.75 using 59 PHA bins.
#Fit statistic : Chi-Squared =          55.36 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     55 degrees of freedom 
# Reduced chi-squared =          1.007 for     55 degrees of freedom 
# Null hypothesis probability =   4.464871e-01
# Null hypothesis probability =   4.611122e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.039e-09   2.546e-09
25- 50  1.721e-08   1.052e-08
50-150  7.078e-08   3.801e-08
15-150  9.203e-08   4.763e-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: 0.890379     ( -0.280981   0.263454 )
Norm@50keV  : 7.97894E-03    ( -0.00128425   0.00126532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.34 using 59 PHA bins.
# Reduced chi-squared =          1.023 for     57 degrees of freedom 
# Null hypothesis probability =   4.260419e-01
 
Photon flux (15-150 keV)    in 1.144 sec: 0.915751 ( -0.145921  0.146725 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02827e-07 ( -1.65446e-08  1.66356e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.321639     ( -1.51724   0.693964 )
Epeak [keV] : 174.617      ( -174.617 -174.617 )
Norm@50keV  : 1.40196E-02    ( -0.00704796   0.043538 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.63 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     56 degrees of freedom 
# Null hypothesis probability =   4.147648e-01
 
Photon flux (15-150 keV)    in 1.144 sec: 0.895506 ( -0.152747  0.152354 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00417e-07 ( -1.80515e-08  1.75389e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -4.99999   -4.99999 )
beta        : -0.934065    ( -0.296794   0.298276 )
Epeak [keV] : 27.3005      ( -27.3002 17.2935 )
Norm@50keV   : 296.976    ( -44.924   1.47292e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.89 using 59 PHA bins.
# Reduced chi-squared =          1.053 for     55 degrees of freedom 
# Null hypothesis probability =   3.690523e-01
 
Photon flux (15-150 keV)    in 1.144 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)  = 1.77e-08
S(50-100 keV) = 3.81e-08

T90 vs. Hardness ratio plot

T90                                   = 0.98800003528595 sec.
Hardness ratio (energy fluence ratio) = 2.15254

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.64469
Count Ratio (50-100 keV) / (15-25 keV) = 2.143

Mask shadow pattern

IMX = 6.833278986216549E-01, IMY = -2.855262225315715E-02

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-239.032000 -0.068000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 16.9262 -52.8885    2.2  47.5   44.5   3.5523   5.2 ------	UNKNOWN                       
  1.7602  -7.4599    2.7  36.6  116.1   1.6194   4.2  459.8	UNKNOWN                       
  7.9220  40.5970    3.6  56.9  179.2   3.1485   3.2 ------	UNKNOWN                       
 39.2413  -2.1963    2.3   6.6 -148.5   0.7410   5.0 ------	UNKNOWN                       
 21.8361  48.3440    2.3  59.0 -166.2   5.4039   5.2 ------	UNKNOWN                       
 75.5688   1.0244    2.4  38.0  -76.3   2.0730   4.8 ------	UNKNOWN

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

Time interval of the image:
-0.068000 1.076000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 31.5467 -36.8812    2.1  28.8   38.8   0.0758   5.4 ------	UNKNOWN                       
 43.2271 -38.3409    2.5  29.8   19.7   0.0579   4.6 ------	UNKNOWN                       
 56.2907 -39.3300    1.1  34.4    2.4   0.1398  10.5 ------	UNKNOWN                       
 85.7123 -43.1810    2.4  53.4  -14.8   0.1404   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
71.268600 623.068600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
168.5867 -84.4902    2.8  52.9   19.7   5.3255   4.1 ------	UNKNOWN                       
 32.6819  10.1710    3.2  54.2  177.0   3.9887   3.6 ------	UNKNOWN                       
122.4270 -48.8131    3.0  46.9  -29.5   2.1514   3.8 ------	UNKNOWN                       
121.9708 -36.7829    3.3  50.6  -44.7   5.5811   3.5 ------	UNKNOWN                       
117.4344 -33.9996    2.6  48.4  -50.1   6.8780   4.5 ------	UNKNOWN

Plot creation:
Sun May 31 09:36:09 EDT 2015