batgrbproduct analysis for trigger=557782

batgrbproduct Analysis for Trigger=557782

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): Wed Sep 10 21:22:01 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger557782
======================================================================

  Trigger: 00557782      Segment: 000

  BAT Trigger Time: 392439919.296   [s; MET]
      Trigger Stop: 392439919.808   [s; MET]
               UTC: 2013-06-09T03:05:08.643500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 152.675973444186   Dec: 24.1013777128368  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.68
     Image Trigger?:     NO
     Rate S/N Ratio:     16.431676725155  [ if not an image trigger ]
     Image S/N Ratio:    9.68

  Flight Position:   [ source = BAT ]
    RA: 152.675973444186   Dec: 24.1013777128368  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 152.681399168073   Dec: 24.1264911388588  [deg; J2000]  
        { 10h 10m 43.5s , +24d 07' 35.4" }
         +/- 1.11928922489939 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.343029922818602 [arcmin] (formal 1-sigma fit error)
    SNR: 25.8940973121231
 
  Angular difference between Flight and Ground position is 1.535823 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 7.05599993467331 +/- 0.797686635421695
        Measured from: -0.568000018596649
                   to: 6.48799991607666     [s; relative to TRIGTIME]
     T50: 2.93199998140335 +/- 0.380525912837393
        Measured from: 0.691999971866608
                   to: 3.62399995326996     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.523999989032745     
                   to: 1.52399998903275     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.18000000715256     
                   to: 7.283999979496     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.367284   0.405406   0.249264   0.021392
           0.020003   0.020915   0.018038   0.014982 [error]
 Peak      0.079285   0.087818   0.045957  -0.006915
           0.007348   0.007854   0.006469   0.005139 [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 1.14e-07 1.66e-07 1.81e-07 3.68e-07 5.74e-07 8.28e-07   erg/cm2
              Error 1.05e-08 9.94e-09 1.75e-08 7.23e-08 4.02e-08 8.93e-08   erg/cm2
Peak flux Power-law 8.11e-01 6.10e-01 3.06e-01 2.20e-01 1.83e+00 1.95e+00   ph/cm2/s
              Error 1.14e-01 6.17e-02 5.23e-02 7.04e-02 1.84e-01 1.99e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.06e-07 1.77e-07 1.80e-07 1.47e-07 5.43e-07 6.10e-07   erg/cm2
              Error 1.21e-08 1.28e-08 1.92e-08 1.01e-07 4.53e-08 1.12e-07   erg/cm2
Peak flux Cutoff-PL 7.60e-01 6.66e-01 3.02e-01 8.45e-02 1.79e+00 1.81e+00   ph/cm2/s
              Error 1.26e-01 8.34e-02 5.98e-02 9.36e-02 1.87e-01 2.05e-01   ph/cm2/s
 
Fluence        Band 1.04e-07 1.76e-07 1.81e-07 1.52e-07 5.44e-07 6.16e-07   erg/cm2
              Error -------- 1.26e-08 -------- -------- 4.53e-08 --------   erg/cm2
Peak flux      Band 7.65e-01 6.59e-01 3.08e-01 9.95e-02 1.80e+00 1.83e+00   ph/cm2/s
              Error 1.26e-01 -------- -------- -------- -------- 2.09e-01   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.879    0.113    -      -           7.37e-03 5.16e-04   60.580 57
CPL   1.283    0.466      53.9   19.8      1.56e-02 9.76e-03   55.040 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.994    0.186    -      -           1.22e-02 1.58e-03   53.500 57
CPL   1.261    0.788      41.7    0.0      3.28e-02 0.00e+00   50.440 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: 5.440000 sec.
T50 in the 50-300 keV band: 2.624000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    8.464   -1.180    7.284
T90     7.056   -0.568    6.488
T50     2.932    0.692    3.624
Peak    1.000    0.524    1.524

Click here for the BAT GCN circular template

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  152.6814    24.1265   0.0074    18.7366  -127.2700         1.0455414     25.894 TRIG_00557782                 
 
Foreground time interval of the image:
 -1.180   7.284 (delta_t =   8.464 [sec])
Background time interval of the image:
-239.296  -1.180 (delta_t = 238.116 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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 0.512000

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 0.512000

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   -1.180 sec. to    7.284 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87941     ( -0.111605   0.114467 )
Norm@50keV  : 7.37463E-03    ( -0.000519291   0.000513291 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.58 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     57 degrees of freedom 
# Null hypothesis probability =   3.481321e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.04921 ( -0.0636908  0.0637429 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.7381e-07 ( -3.9958e-08  4.03785e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.180 sec. to    7.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28256     ( -0.489663   0.441887 )
Epeak [keV] : 53.8745      ( -10.063 29.6337 )
Norm@50keV  : 1.56075E-02    ( -0.00651628   0.0130118 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.04 using 59 PHA bins.
# Reduced chi-squared =         0.9829 for     56 degrees of freedom 
# Null hypothesis probability =   5.110730e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.01808 ( -0.06728  0.06734 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.42587e-07 ( -4.4816e-08  4.58326e-08 ) ergs/cm2

Band function

Time interval is from   -1.180 sec. to    7.284 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.28320   ( -0.4203   0.522267 )
beta        : -10.0000    ( 10   1.06581e-14 )
Epeak [keV] : 53.8775      ( -10.0696 29.9062 )
Norm@50keV   : 1.55927E-02    ( -0.0065031   0.0130327 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.04 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     55 degrees of freedom 
# Null hypothesis probability =   4.729884e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.02352 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.44294e-07 ( -5.44235e-07  -4.71927e-08 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.4605  (-0.873858  0.943511)
R^2/D10^2   : 0.289185  (-0.0739852   0.100167)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         110.50 using 59 PHA bins.
# Reduced chi-squared =         1.9385 for     57 degrees of freedom 
# Null hypothesis probability =   2.797005e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.764e-08   7.630e-09
25- 50  2.014e-07   1.430e-08
50-150  1.541e-07   2.192e-08
15-150  4.231e-07   3.127e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 85.2317       (-16.2232      22.9373)
Norm        : 4.80643       (-0.427737     0.486681)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.10 using 59 PHA bins.
# Reduced chi-squared =         0.9666 for     57 degrees of freedom 
# Null hypothesis probability =   5.468326e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.059e-07   9.903e-09
25- 50  1.770e-07   1.164e-08
50-150  2.605e-07   8.329e-08
15-150  5.434e-07   7.309e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.40375        (-0.890296      1.01079)
R1^2/D10^2  : 3.12134        (-1.46954      3.26872)
kT2 [keV]   : 18.4041        (-2.47682      3.39987)
R2^2/D10^2  : 3.81487E-02    (-0.0189642   0.030652)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.50 using 59 PHA bins.
# Reduced chi-squared =         0.9182 for     55 degrees of freedom 
# Null hypothesis probability =   6.470151e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.085e-07   3.043e-08
25- 50  1.705e-07   3.538e-08
50-150  2.566e-07   7.605e-08
15-150  5.357e-07   1.267e-07

Peak spectrum fit

Power-law model

Time interval is from    0.524 sec. to    1.524 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99386     ( -0.181163   0.191786 )
Norm@50keV  : 1.22324E-02    ( -0.00160153   0.00156775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.50 using 59 PHA bins.
# Reduced chi-squared =         0.9385 for     57 degrees of freedom 
# Null hypothesis probability =   6.073301e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.82969 ( -0.184148  0.184155 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1277e-07 ( -1.38108e-08  1.41026e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.524 sec. to    1.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26068     ( -0.857438   0.718858 )
Epeak [keV] : 41.6814      (   )
Norm@50keV  : 3.27707E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.44 using 59 PHA bins.
# Reduced chi-squared =         0.9006 for     56 degrees of freedom 
# Null hypothesis probability =   6.846154e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.78976 ( -0.18713  0.18753 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05349e-07 ( -1.47016e-08  1.5582e-08 ) ergs/cm2

Band function

Time interval is from    0.524 sec. to    1.524 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.26053   ( -0.437315   0.986944 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 41.6731      ( -12.8031 40.1039 )
Norm@50keV   : 3.27741E-02    ( -0.0199953   0.0714567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.44 using 59 PHA bins.
# Reduced chi-squared =         0.9170 for     55 degrees of freedom 
# Null hypothesis probability =   6.494149e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.80143 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05781e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.86399  (-1.21774  1.37219)
R^2/D10^2   : 0.906456  (-0.353769   0.591329)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.15 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     57 degrees of freedom 
# Null hypothesis probability =   1.132500e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.788e-08   3.145e-09
25- 50  4.359e-08   5.785e-09
50-150  2.186e-08   5.695e-09
15-150  8.332e-08   1.055e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 65.5077       (-17.3168      27.4182)
Norm        : 9.29782       (-1.41604     1.63892)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.45 using 59 PHA bins.
# Reduced chi-squared =         0.8851 for     57 degrees of freedom 
# Null hypothesis probability =   7.174822e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.367e-08   3.105e-09
25- 50  3.697e-08   3.970e-09
50-150  4.515e-08   1.269e-08
15-150  1.058e-07   1.486e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.24796        (-1.25209      1.46098)
R1^2/D10^2  : 6.67943        (-3.90555      7.72652)
kT2 [keV]   : 17.0935        (-3.70969      6.2232)
R2^2/D10^2  : 8.00269E-02    (-0.0573572   0.149542)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.05 using 59 PHA bins.
# Reduced chi-squared =         0.8736 for     55 degrees of freedom 
# Null hypothesis probability =   7.352463e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.439e-08   1.277e-08
25- 50  3.556e-08   1.660e-08
50-150  4.490e-08   2.510e-08
15-150  1.049e-07   4.604e-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: 1.87941     ( -0.111605   0.114467 )
Norm@50keV  : 7.37463E-03    ( -0.000519291   0.000513291 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.58 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     57 degrees of freedom 
# Null hypothesis probability =   3.481321e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.04921 ( -0.0636908  0.0637429 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.7381e-07 ( -3.9958e-08  4.03785e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28256     ( -0.489663   0.441887 )
Epeak [keV] : 53.8745      ( -10.063 29.6337 )
Norm@50keV  : 1.56075E-02    ( -0.00651628   0.0130118 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.04 using 59 PHA bins.
# Reduced chi-squared =         0.9829 for     56 degrees of freedom 
# Null hypothesis probability =   5.110730e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.01808 ( -0.06728  0.06734 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.42587e-07 ( -4.4816e-08  4.58326e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.28320   ( -0.4203   0.522267 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 53.8775      ( -10.0696 29.9062 )
Norm@50keV   : 1.55927E-02    ( -0.0065031   0.0130327 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.04 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     55 degrees of freedom 
# Null hypothesis probability =   4.729884e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.02352 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.44294e-07 ( -5.44235e-07  -4.71927e-08 ) ergs/cm2

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

S(25-50 keV)  = 1.66e-07
S(50-100 keV) = 1.81e-07

T90 vs. Hardness ratio plot

T90                                   = 7.05599993467331 sec.
Hardness ratio (energy fluence ratio) = 1.09036

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.10379
Count Ratio (50-100 keV) / (15-25 keV) = 0.678668

Mask shadow pattern

IMX = -2.054055758425427E-01, IMY = 2.699267135133130E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-239.296000 -1.180000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
220.8947  37.3725    2.2  40.9   33.0   2.1571   5.2 ------	UNKNOWN                       
148.8225  45.9951    2.1  26.5  -70.8   1.5081   5.4 ------	UNKNOWN

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

Time interval of the image:
-1.180000 7.284000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
233.6402  55.7313    1.9  51.0    8.3   0.6228   6.1 ------	UNKNOWN                       
152.6814  24.1265    0.4  18.7 -127.3   1.0455  25.9 ------	UNKNOWN                       
169.8186  69.3625    2.2  41.7  -32.6   0.3213   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
51.004590 842.834000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
174.2898   5.5101    1.9  27.9  112.3   3.4863   6.0 ------	UNKNOWN                       
136.6022 -24.7855    2.6  51.3 -177.3   4.6651   4.4 ------	UNKNOWN                       
135.9740 -10.6679    2.4  38.4 -169.0   2.5647   4.9 ------	UNKNOWN                       
101.7665  61.6166    5.1  50.7  -44.6   5.1251   2.3 ------	UNKNOWN

Plot creation:
Sat May 30 16:28:20 EDT 2015