batgrbproduct analysis for trigger=336489

batgrbproduct Analysis for Trigger=336489

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 20:11:22 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger336489
======================================================================

  Trigger: 00336489      Segment: 000

  BAT Trigger Time: 250005434.88   [s; MET]
      Trigger Stop: 250005435.904   [s; MET]
               UTC: 2008-12-03T13:57:11.575340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 233.033331525279   Dec: 63.4983389938113  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.56
     Image Trigger?:     NO
     Rate S/N Ratio:     14.5258390463339  [ if not an image trigger ]
     Image S/N Ratio:    7.56

  Flight Position:   [ source = BAT ]
    RA: 233.033331525279   Dec: 63.4983389938113  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 233.071076172623   Dec: 63.5154418460716  [deg; J2000]  
        { 15h 32m 17.1s , +63d 30' 55.6" }
         +/- 1.05533052790578 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.312071243511997 [arcmin] (formal 1-sigma fit error)
    SNR: 28.164771700875
 
  Angular difference between Flight and Ground position is 1.440012 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 223 +/- 89.9888882029331
        Measured from: -14.8799999952316
                   to: 208.120000004768     [s; relative to TRIGTIME]
     T50: 43 +/- 4.47213595499958
        Measured from: 9.12000000476837
                   to: 52.1200000047684     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 31.1200000047684     
                   to: 32.1200000047684     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -68.8799999952316     
                   to: 405.120000004768     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.205891   4.451201   3.547946   0.964441
           0.113921   0.119655   0.106345   0.092897 [error]
 Peak      0.069478   0.127489   0.117334   0.042900
           0.007326   0.008244   0.007925   0.006367 [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 9.70e-07 1.87e-06 2.78e-06 8.90e-06 7.83e-06 1.45e-05   erg/cm2
              Error 6.24e-08 6.86e-08 1.07e-07 8.03e-07 2.63e-07 8.57e-07   erg/cm2
Peak flux Power-law 7.25e-01 8.86e-01 7.86e-01 1.20e+00 2.82e+00 3.60e+00   ph/cm2/s
              Error 9.58e-02 7.18e-02 6.22e-02 2.00e-01 1.99e-01 2.65e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.70e-07 1.87e-06 2.78e-06 8.82e-06 7.83e-06 1.44e-05   erg/cm2
              Error 6.95e-08 6.54e-08 1.11e-07 1.34e-06 2.60e-07 1.56e-06   erg/cm2
Peak flux Cutoff-PL 6.73e-01 9.14e-01 8.17e-01 8.12e-01 2.78e+00 3.22e+00   ph/cm2/s
              Error 1.14e-01 8.16e-02 7.41e-02 3.47e-01 2.04e-01 4.45e-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    1.426    0.060    -      -           1.72e-03 5.39e-05   50.960 57
CPL   1.423    0.136    9999.1    0.0      1.72e-03 2.32e-04   50.970 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.174    0.118    -      -           2.41e-02 1.66e-03   62.450 57
CPL   0.817    0.453     177.1  -51.5      3.58e-02 1.89e-02   60.630 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: 80.768000 sec.
T50 in the 50-300 keV band: 29.056000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  474.000  -68.880  405.120
T90   223.000  -14.880  208.120
T50    43.000    9.120   52.120
Peak    1.000   31.120   32.120

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
  233.0711    63.5154   0.0068    35.6574   167.4005         4.1148731     28.165 TRIG_00336489                 
 
Foreground time interval of the image:
-68.880  17.221 (delta_t =  86.101 [sec])
Background time interval of the image:
-252.779 -68.880 (delta_t = 183.899 [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 1.024000

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 1.024000

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 1.024000

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  -68.880 sec. to  405.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42589     ( -0.0604575   0.060377 )
Norm@50keV  : 1.71813E-03    ( -5.38955e-05   5.38951e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.96 using 59 PHA bins.
# Reduced chi-squared =         0.8940 for     57 degrees of freedom 
# Null hypothesis probability =   6.998498e-01
 
Photon flux (15-150 keV)    in 474 sec: 0.210500 ( -0.00721993  0.00725104 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.82877e-06 ( -2.62837e-07  2.6363e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -68.880 sec. to  405.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42273     ( -0.183686   0.0888122 )
Epeak [keV] : 9999.07      (   )
Norm@50keV  : 1.72400E-03    ( -5.4096e-05   0.000410244 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.97 using 59 PHA bins.
# Reduced chi-squared =         0.9101 for     56 degrees of freedom 
# Null hypothesis probability =   6.653283e-01
 
Photon flux (15-150 keV)    in 474 sec: 0.210461 ( -0.007657  0.007 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.82783e-06 ( -2.56766e-07  2.62501e-07 ) ergs/cm2

Band function

Time interval is from  -68.880 sec. to  405.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.562017   ( 0.969745   0.969745 )
beta        : -1.43683    ( 1.44012   0.0707747 )
Epeak [keV] : 28.8197      ( -38.3895 257.822 )
Norm@50keV   : 6.28319E-02    ( -0.0628198   142.859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.52 using 59 PHA bins.
# Reduced chi-squared =         0.9186 for     55 degrees of freedom 
# Null hypothesis probability =   6.461346e-01
 
Photon flux (15-150 keV)    in 474 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]    : 17.3668  (  )
R^2/D10^2   : 1.40087E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         291.04 using 59 PHA bins.
# Reduced chi-squared =         5.1059 for     57 degrees of freedom 
# Null hypothesis probability =   4.108653e-33
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.054e-07   2.763e-08
25- 50  1.824e-06   8.295e-08
50-150  3.954e-06   2.427e-07
15-150  6.184e-06   2.370e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.872887       (-0.0275022     0.0274953)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.68 using 59 PHA bins.
# Reduced chi-squared =          1.293 for     57 degrees of freedom 
# Null hypothesis probability =   6.773569e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.030e-06   3.911e-08
25- 50  1.982e-06   7.442e-08
50-150  4.347e-06   1.503e-07
15-150  7.359e-06   2.726e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.71620        (-0.84565      0.915646)
R1^2/D10^2  : 0.153576        (-0.0476636      0.0760967)
kT2 [keV]   : 31.9168        (-3.79166      5.39841)
R2^2/D10^2  : 1.47339E-03    (-0.000585027   0.000794672)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.50 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     55 degrees of freedom 
# Null hypothesis probability =   4.555831e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.690e-07   9.551e-08
25- 50  1.928e-06   1.330e-07
50-150  5.033e-06   5.726e-07
15-150  7.830e-06   6.873e-07

Peak spectrum fit

Power-law model

Time interval is from   31.120 sec. to   32.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17416     ( -0.118353   0.117085 )
Norm@50keV  : 2.40661E-02    ( -0.00165927   0.00165922 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.45 using 59 PHA bins.
# Reduced chi-squared =          1.096 for     57 degrees of freedom 
# Null hypothesis probability =   2.886352e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.81502 ( -0.199244  0.199459 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.4598e-07 ( -1.87817e-08  1.88666e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   31.120 sec. to   32.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.816752     ( -0.500807   0.405035 )
Epeak [keV] : 177.072      ( -74.1806 -177.082 )
Norm@50keV  : 3.57505E-02    ( -0.0124747   0.0254088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.63 using 59 PHA bins.
# Reduced chi-squared =          1.083 for     56 degrees of freedom 
# Null hypothesis probability =   3.126264e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.77930 ( -0.20446  0.20439 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.40789e-07 ( -2.036e-08  2.0165e-08 ) ergs/cm2

Band function

Time interval is from   31.120 sec. to   32.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.63269   ( -3.72486   -1.63144 )
beta        : -1.33695    ( -0.210358   0.187319 )
Epeak [keV] : 41.0058      ( -18.7417 74.9319 )
Norm@50keV   : 1.62873    ( -1.61507   258.938 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.47 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     55 degrees of freedom 
# Null hypothesis probability =   3.837697e-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]    : 18.4914  (-1.68359  1.90968)
R^2/D10^2   : 0.169418  (-0.0470181   0.063304)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          97.30 using 59 PHA bins.
# Reduced chi-squared =          1.707 for     57 degrees of freedom 
# Null hypothesis probability =   7.045178e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.150e-08   1.541e-09
25- 50  5.423e-08   5.720e-09
50-150  1.355e-07   1.650e-08
15-150  2.012e-07   1.755e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 11.6040       (-0.818732     0.818665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.97 using 59 PHA bins.
# Reduced chi-squared =          1.543 for     57 degrees of freedom 
# Null hypothesis probability =   5.278419e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.889e-08   2.390e-09
25- 50  5.557e-08   5.880e-09
50-150  1.219e-07   3.573e-08
15-150  2.063e-07   4.335e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.73303        (-2.1369      2.40911)
R1^2/D10^2  : 0.903938        (-0.409118      0.916988)
kT2 [keV]   : 39.8442        (-11.47      41.894)
R2^2/D10^2  : 1.11402E-02    (-0.0093116   0.0225392)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.23 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     55 degrees of freedom 
# Null hypothesis probability =   3.924999e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.956e-08   5.475e-09
25- 50  5.690e-08   1.420e-08
50-150  1.682e-07   7.362e-08
15-150  2.447e-07   9.077e-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: 1.35276     ( -0.087814   0.087391 )
Norm@50keV  : 3.31011E-03    ( -0.000157483   0.000157483 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.56 using 59 PHA bins.
# Reduced chi-squared =         0.9221 for     57 degrees of freedom 
# Null hypothesis probability =   6.422072e-01
 
Photon flux (15-150 keV)    in 86.1 sec: 0.399001 ( -0.020299  0.0203724 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.78182e-06 ( -1.4276e-07  1.43326e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31480     ( -0.335787   0.0820152 )
Epeak [keV] : 976.162      ( -9999.36 -9999.36 )
Norm@50keV  : 3.44970E-03    ( -0.000157815   0.00137665 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.61 using 59 PHA bins.
# Reduced chi-squared =         0.9395 for     56 degrees of freedom 
# Null hypothesis probability =   6.038852e-01
 
Photon flux (15-150 keV)    in 86.1 sec: 0.398897 ( -0.020295  0.020144 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.78186e-06 ( -1.3274e-07  1.42866e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.850959   ( 0.839519   5.81469 )
beta        : -1.39147    ( 1.39209   0.117393 )
Epeak [keV] : 78.2888      ( -76.116 501.969 )
Norm@50keV   : 6.78921E-03    ( -0.00398066   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.00 using 59 PHA bins.
# Reduced chi-squared =         0.9455 for     55 degrees of freedom 
# Null hypothesis probability =   5.898251e-01
 
Photon flux (15-150 keV)    in 86.1 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)  = 1.87e-06
S(50-100 keV) = 2.78e-06

T90 vs. Hardness ratio plot

T90                                   = 223 sec.
Hardness ratio (energy fluence ratio) = 1.48663

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.38844
Count Ratio (50-100 keV) / (15-25 keV) = 1.1067

Mask shadow pattern

IMX = -7.001689677475702E-01, IMY = -1.564997302572309E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-252.779400 -68.880000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2745  35.2649   17.4  51.0 -152.1   0.2475   0.7   10.1	Her X-1                       
165.5738   1.5979    2.3  43.1   -9.0   1.0180   5.1 ------	UNKNOWN                       
221.4422   9.7261    3.6  41.1  -98.0   2.1458   3.2 ------	UNKNOWN

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

Time interval of the image:
-68.880000 17.220600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3746  35.2908   25.7  51.0 -152.2  -0.1313  -0.4    5.1	Her X-1                       
233.0711  63.5154    0.4  35.7  167.4   4.1147  28.2 ------	UNKNOWN                       
192.4021  14.1274    2.3  25.0  -52.3   0.5677   5.0 ------	UNKNOWN                       
166.5973 -16.0108    2.0  58.9  -19.2   3.5342   5.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
72.420600 804.020600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6119  35.2596    7.8  31.2 -109.3   0.7597   1.5    9.0	Her X-1                       
299.6042  35.2084    0.5  48.6 -161.3  23.0789  25.5    0.8	Cyg X-1                       
308.2500  40.9507    3.7  47.7 -173.2   2.2665   3.1    6.3	Cyg X-3                       
232.9741  63.5127    1.4   0.0   40.1   2.9367   8.1 ------	UNKNOWN                       
242.7743  35.9721    3.6  28.2  -90.7   1.6724   3.2 ------	UNKNOWN                       
217.2326  17.7115    4.5  47.1  -53.1   5.1601   2.6 ------	UNKNOWN                       
250.1649  23.9497    4.1  41.2  -98.0   6.1634   2.8 ------	UNKNOWN                       
269.1098  24.5029    2.8  45.6 -122.4   7.2310   4.1 ------	UNKNOWN

Plot creation:
Sun May 31 05:23:22 EDT 2015