batgrbproduct analysis for trigger=629547

batgrbproduct Analysis for Trigger=629547

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): Tue Feb 17 21:28:04 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger629547
======================================================================

  Trigger: 00629547      Segment: 000

  BAT Trigger Time: 444611415.488   [s; MET]
      Trigger Stop: 444611417.536   [s; MET]
               UTC: 2015-02-02T23:10:02.353060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 39.2357037817736   Dec: -33.1499202499856  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.85
     Image Trigger?:     NO
     Rate S/N Ratio:     18.6815416922694  [ if not an image trigger ]
     Image S/N Ratio:    10.85

  Flight Position:   [ source = BAT ]
    RA: 39.2357037817736   Dec: -33.1499202499856  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 39.243669948438   Dec: -33.1331291710513  [deg; J2000]  
        { 02h 36m 58.5s , -33d 07' 59.3" }
         +/- 1.61349123068584 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.718884860842111 [arcmin] (formal 1-sigma fit error)
    SNR: 15.3570903038171
 
  Angular difference between Flight and Ground position is 1.084047 arcmin
 
  Partial Coding Fraction: 0.6015625    [ including projection effects ]

  Duration
     T90: 25.472000002861 +/- 4.82001162478996
        Measured from: -0.767999947071075
                   to: 24.7040000557899     [s; relative to TRIGTIME]
     T50: 16.1919999718666 +/- 1.38453165221894
        Measured from: 1.34400004148483
                   to: 17.5360000133514     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 17.3240000009537     
                   to: 18.3240000009537     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.59999996423721     
                   to: 26.688000023365     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.327787   0.312433   0.300886   0.126350
           0.033837   0.034922   0.031059   0.026605 [error]
 Peak      0.026404   0.037940   0.045804   0.016577
           0.006616   0.006929   0.006324   0.005304 [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 8.09e-08 1.52e-07 2.20e-07 6.76e-07 6.24e-07 1.13e-06   erg/cm2
              Error 1.47e-08 1.63e-08 3.10e-08 2.12e-07 7.39e-08 2.34e-07   erg/cm2
Peak flux Power-law 2.45e-01 3.08e-01 2.82e-01 4.51e-01 9.89e-01 1.29e+00   ph/cm2/s
              Error 8.06e-02 5.97e-02 5.04e-02 1.84e-01 1.59e-01 2.18e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.17e-08 1.52e-07 2.21e-07 6.21e-07 6.25e-07 1.07e-06   erg/cm2
              Error 1.47e-08 1.58e-08 3.07e-08 2.77e-07 7.26e-08 2.89e-07   erg/cm2
Peak flux Cutoff-PL 2.49e-01 3.10e-01 2.81e-01 4.40e-01 9.90e-01 1.28e+00   ph/cm2/s
              Error 8.36e-02 5.96e-02 5.17e-02 1.72e-01 1.59e-01 2.50e-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    1.466    0.193    -      -           2.31e-03 2.43e-04   59.440 57
CPL   2.121    0.000      45.8    0.0      1.05e-03 0.00e+00   59.420 56
 
The chi2 of BB fit is -------- which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.127    0.298    -      -           8.50e-03 1.32e-03   36.300 57
CPL   1.129    0.300    9999.4    0.0      8.54e-03 5.80e-03   36.310 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: 19.200000 sec.
T50 in the 50-300 keV band: 14.080000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   28.288   -1.600   26.688
T90    25.472   -0.768   24.704
T50    16.192    1.344   17.536
Peak    1.000   17.324   18.324

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
   39.2437   -33.1331   0.0124    22.7315    80.1288         1.0887588     15.357 TRIG_00629547                 
 
Foreground time interval of the image:
 -1.600  26.688 (delta_t =  28.288 [sec])
Background time interval of the image:
-239.488  -1.600 (delta_t = 237.888 [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 2.048000

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 2.048000

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 2.048000

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   -1.600 sec. to   26.688 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46596     ( -0.192164   0.193657 )
Norm@50keV  : 2.31171E-03    ( -0.000243852   0.000241735 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.44 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     57 degrees of freedom 
# Null hypothesis probability =   3.869044e-01
 
Photon flux (15-150 keV)    in 28.29 sec: 0.286032 ( -0.0295567  0.0296181 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.2401e-07 ( -7.35118e-08  7.43555e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.600 sec. to   26.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.12072     (     )
Epeak [keV] : 45.8191      (   )
Norm@50keV  : 1.04529E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.42 using 59 PHA bins.
# Reduced chi-squared =          1.061 for     56 degrees of freedom 
# Null hypothesis probability =   3.521675e-01
 
Photon flux (15-150 keV)    in 28.29 sec: 0.286540 ( -0.044978  0.02913 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.24646e-07 ( -7.37973e-08  7.13898e-08 ) ergs/cm2

Band function

Time interval is from   -1.600 sec. to   26.688 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.13277   ( 1.12543   1.12543 )
beta        : -1.46636    ( -0.20272   0.194056 )
Epeak [keV] : 45.1608      ( -48.406 -48.406 )
Norm@50keV   : 4.59289E-03    ( -0.00249922   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.43 using 59 PHA bins.
# Reduced chi-squared =          1.081 for     55 degrees of freedom 
# Null hypothesis probability =   3.173300e-01
 
Photon flux (15-150 keV)    in 28.29 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]    : 16.4356  (-2.47911  2.98301)
R^2/D10^2   : 2.27813E-02  (-0.00976977   0.0171656)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          97.63 using 59 PHA bins.
# Reduced chi-squared =          1.713 for     57 degrees of freedom 
# Null hypothesis probability =   6.525971e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.577e-08   7.344e-09
25- 50  1.540e-07   2.579e-08
50-150  2.936e-07   5.754e-08
15-150  4.833e-07   7.327e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 1.16634       (-0.118777     0.118771)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.39 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     57 degrees of freedom 
# Null hypothesis probability =   2.906644e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.217e-08   4.518e-08
25- 50  1.581e-07   8.705e-08
50-150  3.467e-07   1.871e-07
15-150  5.869e-07   3.158e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.08991        (-1.14673      1.57594)
R1^2/D10^2  : 1.08289        (-0.708136      2.21154)
kT2 [keV]   : 27.1237        (-5.65936      10.1479)
R2^2/D10^2  : 3.74410E-03    (-0.00234743   0.00439186)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.21 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     55 degrees of freedom 
# Null hypothesis probability =   3.932028e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.291e-08   4.638e-08
25- 50  1.310e-07   4.014e-08
50-150  4.125e-07   1.431e-07
15-150  6.364e-07   1.938e-07

Peak spectrum fit

Power-law model

Time interval is from   17.324 sec. to   18.324 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12669     ( -0.303057   0.293238 )
Norm@50keV  : 8.49883E-03    ( -0.00132454   0.00132269 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.30 using 59 PHA bins.
# Reduced chi-squared =         0.6368 for     57 degrees of freedom 
# Null hypothesis probability =   9.852219e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.988511 ( -0.159229  0.15974 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.81151e-08 ( -1.52485e-08  1.54077e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   17.324 sec. to   18.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12898     ( -0.312103   0.288514 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 8.54453E-03    ( -0.00132618   0.0102829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.31 using 59 PHA bins.
# Reduced chi-squared =         0.6484 for     56 degrees of freedom 
# Null hypothesis probability =   9.809136e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.990381 ( -0.160003  0.157599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.74888e-08 ( -1.46594e-08  1.58542e-08 ) ergs/cm2

Band function

Time interval is from   17.324 sec. to   18.324 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.919923   ( 0.919923   0.919923 )
beta        : -1.12668    ( 1.12668   0.303054 )
Epeak [keV] : 51.7615      ( -51.7615 -51.7615 )
Norm@50keV   : 1.46047E-02    ( -0.00657649   463273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.30 using 59 PHA bins.
# Reduced chi-squared =         0.6600 for     55 degrees of freedom 
# Null hypothesis probability =   9.757151e-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]    : 21.8361  (-4.62175  6.58514)
R^2/D10^2   : 3.40679E-02  (-0.0189569   0.0389855)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.55 using 59 PHA bins.
# Reduced chi-squared =         0.8342 for     57 degrees of freedom 
# Null hypothesis probability =   8.094660e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.017e-09   1.224e-09
25- 50  1.588e-08   4.419e-09
50-150  5.656e-08   1.902e-08
15-150  7.546e-08   2.001e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 4.07460       (-0.652467     0.652401)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.95 using 59 PHA bins.
# Reduced chi-squared =         0.7535 for     57 degrees of freedom 
# Null hypothesis probability =   9.160385e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.015e-08   5.800e-09
25- 50  1.952e-08   1.097e-08
50-150  4.280e-08   2.399e-08
15-150  7.247e-08   4.087e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.72662        (-1.9225      4.24437)
R1^2/D10^2  : 3.91646        (-3.55505      46.5035)
kT2 [keV]   : 29.6463        (-7.86237      20.0467)
R2^2/D10^2  : 1.22171E-02    (-0.0094797   0.0182388)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.59 using 59 PHA bins.
# Reduced chi-squared =         0.6472 for     55 degrees of freedom 
# Null hypothesis probability =   9.803961e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.257e-09   5.065e-09
25- 50  1.468e-08   6.516e-09
50-150  6.491e-08   3.249e-08
15-150  8.884e-08   4.412e-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: 1.46596     ( -0.192164   0.193657 )
Norm@50keV  : 2.31171E-03    ( -0.000243852   0.000241735 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.44 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     57 degrees of freedom 
# Null hypothesis probability =   3.869044e-01
 
Photon flux (15-150 keV)    in 28.29 sec: 0.286032 ( -0.0295567  0.0296181 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.2401e-07 ( -7.35118e-08  7.43555e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.12072     (     )
Epeak [keV] : 45.8191      (   )
Norm@50keV  : 1.04529E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.42 using 59 PHA bins.
# Reduced chi-squared =          1.061 for     56 degrees of freedom 
# Null hypothesis probability =   3.521675e-01
 
Photon flux (15-150 keV)    in 28.29 sec: 0.286540 ( -0.044978  0.02913 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.24646e-07 ( -7.37973e-08  7.13898e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.13277   ( 1.12543   1.12543 )
beta        : -1.46636    ( -0.20272   0.194056 )
Epeak [keV] : 45.1608      ( -48.406 -48.406 )
Norm@50keV   : 4.59289E-03    ( -0.00249922   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.43 using 59 PHA bins.
# Reduced chi-squared =          1.081 for     55 degrees of freedom 
# Null hypothesis probability =   3.173300e-01
 
Photon flux (15-150 keV)    in 28.29 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)  = 1.52e-07
S(50-100 keV) = 2.20e-07

T90 vs. Hardness ratio plot

T90                                   = 25.472000002861 sec.
Hardness ratio (energy fluence ratio) = 1.44737

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.953159
Count Ratio (50-100 keV) / (15-25 keV) = 0.917931

Mask shadow pattern

IMX = 7.182336479167151E-02, IMY = -4.127527821486207E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-239.488000 -1.600000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 26.9186  16.4695    3.0  55.9   10.6   3.8602   3.9 ------	UNKNOWN                       
 28.5016 -27.3399    2.5  17.4   51.9   0.8142   4.6 ------	UNKNOWN                       
344.1786 -84.3851    3.0  47.5  176.6   1.4708   3.8 ------	UNKNOWN                       
308.4789 -77.6262    2.4  47.8 -172.0   1.5870   4.8 ------	UNKNOWN

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

Time interval of the image:
-1.600000 26.688000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 81.0199 -65.1211    2.4  47.8  141.0   1.0930   4.8 ------	UNKNOWN                       
 39.2437 -33.1331    0.7  22.7   80.1   1.0889  15.4 ------	UNKNOWN                       
348.4809 -57.4130    2.6  25.1 -156.7   0.2391   4.5 ------	UNKNOWN                       
327.8250 -22.0697    2.2  40.7  -87.3   1.0825   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
72.412610 962.570600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 91.5591 -67.9235    2.8  45.7  166.1   4.8800   4.1 ------	UNKNOWN                       
124.5196 -75.9087    4.7  56.8  173.8   7.4694   2.5 ------	UNKNOWN                       
 23.4294  -8.2688    2.8  28.8  -23.2   2.1959   4.0 ------	UNKNOWN                       
340.9737 -51.5341    3.3  45.4 -121.3   8.8256   3.5 ------	UNKNOWN

Plot creation:
Thu May 28 13:36:26 EDT 2015