batgrbproduct analysis for trigger=335895

batgrbproduct Analysis for Trigger=335895

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): Sun Jan 19 20:16:58 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger335895
======================================================================

  Trigger: 00335895      Segment: 000

  BAT Trigger Time: 249585528   [s; MET]
      Trigger Stop: 249585616   [s; MET]
               UTC: 2008-11-28T17:18:44.708060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 20.7981962498564   Dec: 38.1151246414524  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    20.22
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    20.22

  Flight Position:   [ source = BAT ]
    RA: 20.7981962498564   Dec: 38.1151246414524  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 20.8010912395511   Dec: 38.1225509909459  [deg; J2000]  
        { 01h 23m 12.3s , +38d 07' 21.2" }
         +/- 0.957842186923752 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.313384247613815 [arcmin] (formal 1-sigma fit error)
    SNR: 32.3475425452977
 
  Angular difference between Flight and Ground position is 0.466065 arcmin
 
  Partial Coding Fraction: 0.7421875    [ including projection effects ]

  Duration
     T90: 102.315999984741 +/- 10.6085107395872
        Measured from: -48.8039999902248
                   to: 53.5119999945164     [s; relative to TRIGTIME]
     T50: 32.0120000243187 +/- 5.52789290421497
        Measured from: 3.9839999973774
                   to: 35.9960000216961     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 17.5959999859333     
                   to: 18.5959999859333     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -68.9799999892712     
                   to: 62.6599999964237     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.462672   1.830976   1.020446   0.176184
           0.066113   0.069333   0.060676   0.053871 [error]
 Peak      0.041708   0.053543   0.045269   0.016238
           0.006528   0.007044   0.006156   0.005041 [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 5.06e-07 7.39e-07 8.04e-07 1.64e-06 2.55e-06 3.68e-06   erg/cm2
              Error 3.76e-08 3.53e-08 5.84e-08 2.42e-07 1.37e-07 2.98e-07   erg/cm2
Peak flux Power-law 4.28e-01 4.25e-01 2.96e-01 3.26e-01 1.28e+00 1.47e+00   ph/cm2/s
              Error 9.52e-02 5.86e-02 5.01e-02 1.13e-01 1.69e-01 1.94e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.51e-07 8.14e-07 7.90e-07 4.32e-07 2.34e-06 2.49e-06   erg/cm2
              Error 4.40e-08 4.72e-08 6.84e-08 2.26e-07 1.57e-07 2.75e-07   erg/cm2
Peak flux Cutoff-PL 4.24e-01 4.28e-01 2.97e-01 3.03e-01 1.28e+00 1.45e+00   ph/cm2/s
              Error 1.05e-01 6.60e-02 5.37e-02 2.24e-01 1.72e-01 2.47e-01   ph/cm2/s
 
Fluence        Band 4.32e-07 8.30e-07 7.50e-07 1.08e-06 2.40e-06 3.10e-06   erg/cm2
              Error 4.75e-08 5.09e-08 6.57e-08 7.01e-07 1.49e-07 --------   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    1.879    0.086    -      -           2.11e-03 1.13e-04   69.730 57
CPL   0.940    0.423      49.9    6.7      6.91e-03 3.94e-03   51.620 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.523    0.229    -      -           1.02e-02 1.37e-03   58.200 57
CPL   1.467    1.105     476.5    0.0      1.09e-02 1.54e-02   58.190 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: 80.960000 sec.
T50 in the 50-300 keV band: 28.800000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  131.640  -68.980   62.660
T90   102.316  -48.804   53.512
T50    32.012    3.984   35.996
Peak    1.000   17.596   18.596

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
   20.8011    38.1226   0.0060    31.9507  -179.9777         3.7020476     32.348 TRIG_00335895                 
 
Foreground time interval of the image:
 -4.699  62.660 (delta_t =  67.359 [sec])
Background time interval of the image:

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 88.000000

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 88.000000

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 88.000000

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  -68.980 sec. to   62.660 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87892     ( -0.0858404   0.0871586 )
Norm@50keV  : 2.10925E-03    ( -0.000113307   0.000112545 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.73 using 59 PHA bins.
# Reduced chi-squared =          1.223 for     57 degrees of freedom 
# Null hypothesis probability =   1.200132e-01
 
Photon flux (15-150 keV)    in 131.6 sec: 0.300028 ( -0.0146553  0.0146729 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.55176e-06 ( -1.36224e-07  1.37088e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -68.980 sec. to   62.660 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.939746     ( -0.443983   0.401037 )
Epeak [keV] : 49.8558      ( -5.35506 8.06493 )
Norm@50keV  : 6.91096E-03    ( -0.00271486   0.00516203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.62 using 59 PHA bins.
# Reduced chi-squared =         0.9218 for     56 degrees of freedom 
# Null hypothesis probability =   6.411172e-01
 
Photon flux (15-150 keV)    in 131.6 sec: 0.286245 ( -0.015617  0.015642 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33685e-06 ( -1.55564e-07  1.59091e-07 ) ergs/cm2

Band function

Time interval is from  -68.980 sec. to   62.660 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.939698   ( -0.296094   0.356326 )
beta        : -10.00000    ( 10   20 )
Epeak [keV] : 49.8466      ( -5.33905 6.34354 )
Norm@50keV   : 6.91098E-03    ( -0.00199058   0.00516765 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.62 using 59 PHA bins.
# Reduced chi-squared =         0.9386 for     55 degrees of freedom 
# Null hypothesis probability =   6.044785e-01
 
Photon flux (15-150 keV)    in 131.6 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.40442e-06 ( -2.4035e-06  -1.4909e-07 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.2850  (-0.612319  0.649213)
R^2/D10^2   : 8.86868E-02  (-0.0170861   0.0210813)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         107.68 using 59 PHA bins.
# Reduced chi-squared =         1.8891 for     57 degrees of freedom 
# Null hypothesis probability =   5.755061e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.120e-07   2.652e-08
25- 50  9.113e-07   4.461e-08
50-150  6.683e-07   7.297e-08
15-150  1.892e-06   1.092e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 82.7889       (-12.2866      15.9668)
Norm        : 1.39221       (-0.102009     0.111967)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.66 using 59 PHA bins.
# Reduced chi-squared =         0.9414 for     57 degrees of freedom 
# Null hypothesis probability =   6.011179e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.764e-07   3.158e-08
25- 50  7.906e-07   3.987e-08
50-150  1.142e-06   1.341e-07
15-150  2.409e-06   1.494e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.72292        (-1.17532      1.25221)
R1^2/D10^2  : 0.393776        (-0.149431      0.304204)
kT2 [keV]   : 19.3248        (-3.34932      5.78651)
R2^2/D10^2  : 7.64064E-03    (-0.0047286   0.00909196)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.68 using 59 PHA bins.
# Reduced chi-squared =         0.9033 for     55 degrees of freedom 
# Null hypothesis probability =   6.773187e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.335e-07   1.197e-07
25- 50  8.125e-07   1.720e-07
50-150  1.048e-06   4.776e-07
15-150  2.294e-06   6.193e-07

Peak spectrum fit

Power-law model

Time interval is from   17.596 sec. to   18.596 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52253     ( -0.22706   0.230223 )
Norm@50keV  : 1.01785E-02    ( -0.00137304   0.00135987 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.20 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     57 degrees of freedom 
# Null hypothesis probability =   4.308826e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.27853 ( -0.16874  0.169051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.62134e-08 ( -1.40881e-08  1.4248e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   17.596 sec. to   18.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46687     ( -0.962227   1.24824 )
Epeak [keV] : 476.502      ( -476.714 -476.714 )
Norm@50keV  : 1.08724E-02    ( -0.00854378   0.0222831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.19 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     56 degrees of freedom 
# Null hypothesis probability =   3.947177e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.27571 ( -0.17345  0.17092 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.58702e-08 ( -1.53138e-08  1.45168e-08 ) ergs/cm2

Band function

Time interval is from   17.596 sec. to   18.596 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.32622   ( 1.23169   5.9311 )
beta        : -1.60518    ( 1.55177   0.255878 )
Epeak [keV] : 159.077      ( -89.1646 -89.1646 )
Norm@50keV   : 1.29370E-02    ( -0.00409094   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.14 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     55 degrees of freedom 
# Null hypothesis probability =   3.603869e-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]    : 14.4339  (-2.324  2.9147)
R^2/D10^2   : 0.163440  (-0.0779875   0.1419)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.94 using 59 PHA bins.
# Reduced chi-squared =          1.297 for     57 degrees of freedom 
# Null hypothesis probability =   6.514960e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.169e-09   1.771e-09
25- 50  2.747e-08   5.565e-09
50-150  3.826e-08   1.070e-08
15-150  7.290e-08   1.468e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-84.8516      -199.363)
Norm        : 5.22450       (-0.67543     0.676279)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.46 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     57 degrees of freedom 
# Null hypothesis probability =   4.215691e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.301e-08   7.300e-09
25- 50  2.503e-08   1.392e-08
50-150  5.489e-08   3.014e-08
15-150  9.292e-08   5.125e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.75715        (-3.25525      4.9334)
R1^2/D10^2  : 1.51126        (-1.18053      17.4074)
kT2 [keV]   : 26.0460        (-9.17105      -26.319)
R2^2/D10^2  : 1.65090E-02    (-0.0156714   0.0637243)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.94 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     55 degrees of freedom 
# Null hypothesis probability =   3.013134e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.257e-08   7.130e-09
25- 50  2.465e-08   1.293e-08
50-150  5.703e-08   3.239e-08
15-150  9.425e-08   5.055e-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: 1.92300     ( -0.0849418   0.0863739 )
Norm@50keV  : 3.24546E-03    ( -0.000173524   0.000172349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.91 using 59 PHA bins.
# Reduced chi-squared =          1.244 for     57 degrees of freedom 
# Null hypothesis probability =   1.018471e-01
 
Photon flux (15-150 keV)    in 67.36 sec: 0.470372 ( -0.0228231  0.0228548 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.01049e-06 ( -1.05319e-07  1.0595e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.857823     ( -0.455368   0.411501 )
Epeak [keV] : 47.5560      ( -4.61761 6.06521 )
Norm@50keV  : 1.23841E-02    ( -0.00494844   0.00949796 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.28 using 59 PHA bins.
# Reduced chi-squared =         0.8621 for     56 degrees of freedom 
# Null hypothesis probability =   7.588772e-01
 
Photon flux (15-150 keV)    in 67.36 sec: 0.445654 ( -0.024394  0.024441 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.83191e-06 ( -1.18237e-07  1.21093e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.798644   ( -0.441078   1.45595 )
beta        : -3.05320    ( 3.05337   0.839563 )
Epeak [keV] : 46.8105      ( -11.1351 6.27669 )
Norm@50keV   : 1.34600E-02    ( -0.00576226   0.114011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.91 using 59 PHA bins.
# Reduced chi-squared =         0.8712 for     55 degrees of freedom 
# Null hypothesis probability =   7.398094e-01
 
Photon flux (15-150 keV)    in 67.36 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.83984e-06 ( -1.83937e-06  -1.20904e-07 ) ergs/cm2

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

S(25-50 keV)  = 7.39e-07
S(50-100 keV) = 8.04e-07

T90 vs. Hardness ratio plot

T90                                   = 102.315999984741 sec.
Hardness ratio (energy fluence ratio) = 1.08796

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.2518
Count Ratio (50-100 keV) / (15-25 keV) = 0.697659

Mask shadow pattern

IMX = -6.236743208708314E-01, IMY = 2.432135093438287E-04

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000

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:

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

Time interval of the image:
-4.699400 62.660000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6358  22.0018    0.4  23.7   -2.7   2.7939  29.3    0.8	Crab                          
359.4898  30.4090    2.6  50.6  173.2   1.1856   4.4 ------	UNKNOWN                       
 94.4180   9.8346    2.5  39.2    4.9   0.6306   4.6 ------	UNKNOWN                       
 20.8011  38.1226    0.4  32.0 -180.0   3.7022  32.3 ------	UNKNOWN                       
 41.9482  61.6059    2.3  31.6 -127.6   0.5893   4.9 ------	UNKNOWN                       
 86.6948  70.2221    3.1  41.0  -98.2   1.6340   3.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
184.500600 958.400610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 68.7617  43.7887    2.6  36.2   54.8   3.6799   4.4 ------	UNKNOWN                       
 18.2083 -14.0697    2.0  52.3  172.5   8.1536   5.7 ------	UNKNOWN                       
 29.5799  30.1600    2.6  10.8  124.5   1.5897   4.5 ------	UNKNOWN                       
313.0949  57.7400    3.4  47.0  -53.1   8.8916   3.4 ------	UNKNOWN                       
330.3390  32.7161    3.4  40.9  -92.4   8.6043   3.4 ------	UNKNOWN                       
337.7811  12.8726    3.1  45.7 -122.4   8.8050   3.8 ------	UNKNOWN

Plot creation:
Sun May 31 05:25:05 EDT 2015