batgrbproduct analysis for trigger=261880

batgrbproduct Analysis for Trigger=261880

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 11:19:39 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger261880
======================================================================

  Trigger: 00261880      Segment: 000

  BAT Trigger Time: 194041680   [s; MET]
      Trigger Stop: 194041744   [s; MET]
               UTC: 2007-02-24T20:27:58.214180    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 178.989686201408   Dec: -13.3399298580834  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.5
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.5

  Flight Position:   [ source = BAT ]
    RA: 178.989686201408   Dec: -13.3399298580834  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 178.99720195201   Dec: -13.373545725744  [deg; J2000]  
        { 11h 55m 59.3s , -13d 22' 24.8" }
         +/- 2.29129570710923 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.910543767147948 [arcmin] (formal 1-sigma fit error)
    SNR: 9.30500796835042
 
  Angular difference between Flight and Ground position is 2.064121 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 48 +/- 35.7770876399966
        Measured from: -15
                   to: 33     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: -15
                   to: 1     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -7.5     
                   to: -6.5     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15     
                   to: 49     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.361915   0.289511   0.112186   0.027142
           0.037197   0.038685   0.033804   0.030114 [error]
 Peak      0.009983   0.014453  -0.004225   0.000578
           0.004767   0.004912   0.004304   0.003772 [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 1.04e-07 1.19e-07 9.75e-08 1.34e-07 3.70e-07 4.54e-07   erg/cm2
              Error 1.73e-08 1.79e-08 2.87e-08 7.42e-08 6.60e-08 1.13e-07   erg/cm2
Peak flux Power-law 9.77e-02 6.35e-02 2.68e-02 1.55e-02 1.96e-01 2.05e-01   ph/cm2/s
              Error 5.96e-02 2.83e-02 2.80e-02 2.95e-02 1.08e-01 1.15e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.02e-07 1.30e-07 8.50e-08 3.02e-08 3.38e-07 3.47e-07   erg/cm2
              Error 1.85e-08 2.47e-08 3.66e-08 7.71e-08 7.41e-08 1.36e-07   erg/cm2
Peak flux Cutoff-PL 7.68e-02 1.24e-01 7.35e-03 8.34e-07 2.08e-01 2.08e-01   ph/cm2/s
              Error 6.33e-02 6.04e-02 1.75e-02 7.89e-04 9.60e-02 9.60e-02   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    2.289    0.285    -      -           6.05e-04 1.31e-04   61.380 57
CPL   1.509    1.168      22.6   17.2      1.89e-03 8.41e-03   60.220 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.157    0.990    -      -           1.22e-03 8.71e-04   51.040 57
CPL  -6.953    0.000      32.0    6.7      1.24e+03 0.00e+00   45.510 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   64.000  -15.000   49.000
T90    48.000  -15.000   33.000
T50    16.000  -15.000    1.000
Peak    1.000   -7.500   -6.500

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
  178.9972   -13.3735   0.0206    12.2877    -0.4991         0.7773800      9.305 TRIG_00261880                 
 
Foreground time interval of the image:
-15.000  49.000 (delta_t =  64.000 [sec])
Background time interval of the image:
-239.000 -15.000 (delta_t = 224.000 [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 64.000000

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 64.000000

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 64.000000

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  -15.000 sec. to   49.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.28896     ( -0.270033   0.300418 )
Norm@50keV  : 6.05476E-04    ( -0.000131605   0.000129548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.38 using 59 PHA bins.
# Reduced chi-squared =          1.077 for     57 degrees of freedom 
# Null hypothesis probability =   3.219588e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.105166 ( -0.0140837  0.0140907 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.69565e-07 ( -6.43936e-08  6.76486e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -15.000 sec. to   49.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50948     ( -1.50888   0.827012 )
Epeak [keV] : 22.5772      ( -19.4422 14.9217 )
Norm@50keV  : 1.89181E-03    ( -0.00108144   0.0157306 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.22 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     56 degrees of freedom 
# Null hypothesis probability =   3.255668e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.102803 ( -0.0142401  0.014441 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.38113e-07 ( -6.5769e-08  8.24838e-08 ) ergs/cm2

Band function

Time interval is from  -15.000 sec. to   49.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.93025   ( -4.93025   -4.93025 )
beta        : -2.39981    ( -0.439841   0.314329 )
Epeak [keV] : 19.1140      ( -19.114 4.04236 )
Norm@50keV   : 689.880    ( -91.628   1.52084e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.50 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     55 degrees of freedom 
# Null hypothesis probability =   2.840491e-01
 
Photon flux (15-150 keV)    in 64 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]    : 8.08272  (-1.26622  1.414)
R^2/D10^2   : 0.111052  (-0.0522055   0.107324)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.50 using 59 PHA bins.
# Reduced chi-squared =          1.219 for     57 degrees of freedom 
# Null hypothesis probability =   1.238857e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.460e-08   2.094e-08
25- 50  1.507e-07   3.296e-08
50-150  4.093e-08   1.726e-08
15-150  2.763e-07   5.315e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 39.5705       (-11.8194      19.7686)
Norm        : 0.687781       (-0.158985     0.22296)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.29 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     57 degrees of freedom 
# Null hypothesis probability =   3.577540e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.007e-07   1.677e-08
25- 50  1.319e-07   2.493e-08
50-150  1.008e-07   4.606e-08
15-150  3.334e-07   6.963e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.55951        (-1.31194      1.751)
R1^2/D10^2  : 2.02942        (-1.65053      22.2645)
kT2 [keV]   : 11.5565        (-2.55973      4.62)
R2^2/D10^2  : 2.09058E-02    (-0.0163667   0.0416728)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.75 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     55 degrees of freedom 
# Null hypothesis probability =   3.398249e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.028e-07   5.398e-08
25- 50  1.299e-07   6.931e-08
50-150  8.869e-08   5.398e-08
15-150  3.214e-07   1.686e-07

Peak spectrum fit

Power-law model

Time interval is from   -7.500 sec. to   -6.500 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.15739     ( -0.89301   1.08746 )
Norm@50keV  : 1.21692E-03    ( -0.000872113   0.000869417 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.04 using 59 PHA bins.
# Reduced chi-squared =         0.8954 for     57 degrees of freedom 
# Null hypothesis probability =   6.972080e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.195595 ( -0.107622  0.107966 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08959e-08 ( -6.79282e-09  8.01032e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from   -7.500 sec. to   -6.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -6.95328     (     )
Epeak [keV] : 32.0340      ( -4.32483 9.05452 )
Norm@50keV  : 1238.58    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.51 using 59 PHA bins.
# Reduced chi-squared =         0.8126 for     56 degrees of freedom 
# Null hypothesis probability =   8.406599e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.207831 ( -0.093979  0.097976 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.85905e-09 ( -4.48605e-09  4.94545e-09 ) ergs/cm2

Band function

Time interval is from   -7.500 sec. to   -6.500 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98098   ( -13.8292   -4.98098 )
beta        : -9.36691    ( 9.36691   19.335 )
Epeak [keV] : 31.9662      ( -7.32957 9.13652 )
Norm@50keV   : 67.3606    ( -29.0705   312.504 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.61 using 59 PHA bins.
# Reduced chi-squared =         0.8293 for     55 degrees of freedom 
# Null hypothesis probability =   8.125789e-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]    : 8.08569  (-2.4412  3.3135)
R^2/D10^2   : 0.264583  (-0.262656   0.760284)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.72 using 59 PHA bins.
# Reduced chi-squared =         0.8196 for     57 degrees of freedom 
# Null hypothesis probability =   8.326229e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.153e-09   2.008e-09
25- 50  5.620e-09   3.703e-09
50-150  1.528e-09   1.450e-09
15-150  1.030e-08   7.025e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 34.5724       (-22.3553      122.173)
Norm        : 1.49992       (-0.919735     1.95651)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.55 using 59 PHA bins.
# Reduced chi-squared =         0.8693 for     57 degrees of freedom 
# Null hypothesis probability =   7.477564e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.260e-09   2.078e-09
25- 50  4.011e-09   2.736e-09
50-150  2.625e-09   2.711e-09
15-150  9.896e-09   7.430e-09

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.00088E-04        (      )
R1^2/D10^2  : 6.30878E-02        (-0.0630917      -0.0630917)
kT2 [keV]   : 8.12010        (-2.42469      3.32731)
R2^2/D10^2  : 0.260535    (-0.261446   0.761101)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.73 using 59 PHA bins.
#Fit statistic : Chi-Squared =          46.72 using 59 PHA bins.
# Reduced chi-squared =         0.8497 for     55 degrees of freedom 
# Reduced chi-squared =         0.8494 for     55 degrees of freedom 
# Null hypothesis probability =   7.785565e-01
# Null hypothesis probability =   7.790368e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.123e-09   5.710e-04
25- 50  5.777e-09   4.849e-03
50-150  1.691e-09   1.167e-01
15-150  1.059e-08   1.134e-01

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: 2.28896     ( -0.270033   0.300418 )
Norm@50keV  : 6.05476E-04    ( -0.000131605   0.000129548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.38 using 59 PHA bins.
# Reduced chi-squared =          1.077 for     57 degrees of freedom 
# Null hypothesis probability =   3.219588e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.105166 ( -0.0140837  0.0140907 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.69565e-07 ( -6.43936e-08  6.76486e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50948     ( -1.50888   0.827012 )
Epeak [keV] : 22.5772      ( -19.3658 14.9254 )
Norm@50keV  : 1.89181E-03    ( -0.00108144   0.0157306 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.22 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     56 degrees of freedom 
# Null hypothesis probability =   3.255668e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.102803 ( -0.0142401  0.014441 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.38113e-07 ( -6.5769e-08  8.24838e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.93025   ( -4.93025   -4.93025 )
beta        : -2.39981    ( -0.439841   0.314329 )
Epeak [keV] : 19.1140      ( -19.114 4.04236 )
Norm@50keV   : 689.880    ( -91.628   1.52084e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.50 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     55 degrees of freedom 
# Null hypothesis probability =   2.840491e-01
 
Photon flux (15-150 keV)    in 64 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)  = 1.19e-07
S(50-100 keV) = 9.75e-08

T90 vs. Hardness ratio plot

T90                                   = 48 sec.
Hardness ratio (energy fluence ratio) = 0.819328

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.799942
Count Ratio (50-100 keV) / (15-25 keV) = 0.309979

Mask shadow pattern

IMX = 2.178018704812982E-01, IMY = 1.897387479609091E-03

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-239.000000 -15.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
179.6562  43.9069    2.9  45.0  173.7   1.1662   3.9 ------	UNKNOWN                       
197.6841  42.0144    2.2  46.0 -167.6   1.4909   5.2 ------	UNKNOWN                       
194.4151  14.4744    2.1  21.1 -144.1   0.9032   5.5 ------	UNKNOWN

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

Time interval of the image:
-15.000000 49.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
154.5690  42.7021    1.9  49.5  149.6   1.9876   6.0 ------	UNKNOWN                       
176.8772 -11.6020    2.5  11.0   11.3   0.3707   4.7 ------	UNKNOWN                       
178.9972 -13.3736    1.2  12.3   -0.5   0.7776   9.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
129.100590 963.100000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6042 -40.5968    5.1  46.6   -0.0   1.8253   2.2    4.3	Vela X-1                      
170.2892 -60.6424    5.7  47.7  -40.2   2.7231   2.0    1.4	Cen X-3                       
159.7756   0.1318    2.7  23.3   78.0   2.0529   4.3 ------	UNKNOWN                       
174.5395  -1.3048    2.9  12.8  113.9   1.4027   4.0 ------	UNKNOWN                       
145.3789 -33.3172    3.0  36.5    5.2   1.9049   3.8 ------	UNKNOWN                       
189.5516   1.6451    3.0  18.3  170.0   1.3517   3.8 ------	UNKNOWN                       
143.4278 -50.4883    2.4  47.0  -15.5   3.4858   4.7 ------	UNKNOWN                       
231.4595  15.4639    3.7  59.4 -163.2  11.2082   3.2 ------	UNKNOWN

Plot creation:
Sun May 31 10:46:19 EDT 2015