batgrbproduct analysis for trigger=515976

batgrbproduct Analysis for Trigger=515976

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 13 06:22:08 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger515976
======================================================================

  Trigger: 00515976      Segment: 000

  BAT Trigger Time: 351751204.416   [s; MET]
      Trigger Stop: 351751208.512   [s; MET]
               UTC: 2012-02-24T04:39:56.492380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 40.9754640993993   Dec: -17.7926294691115  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.8
     Image Trigger?:     NO
     Rate S/N Ratio:     9.8488578017961  [ if not an image trigger ]
     Image S/N Ratio:    7.8

  Flight Position:   [ source = BAT ]
    RA: 40.9754640993993   Dec: -17.7926294691115  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 40.9352492353547   Dec: -17.7805838114318  [deg; J2000]  
        { 02h 43m 44.5s , -17d 46' 50.1" }
         +/- 2.36674659485247 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.09760698224247 [arcmin] (formal 1-sigma fit error)
    SNR: 8.88414962720802
 
  Angular difference between Flight and Ground position is 2.408552 arcmin
 
  Partial Coding Fraction: 0.296875    [ including projection effects ]

  Duration
     T90: 7 +/- 2.23606797749979
        Measured from: -1.41600000858307
                   to: 5.58399999141693     [s; relative to TRIGTIME]
     T50: 4 +/- 1
        Measured from: -0.416000008583069
                   to: 3.58399999141693     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.416000008583069     
                   to: 0.583999991416931     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.41600000858307     
                   to: 6.58399999141693     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.171260   0.184099   0.052321   0.032755
           0.026116   0.026961   0.023974   0.022327 [error]
 Peak      0.032861   0.039973   0.011694   0.009748
           0.009204   0.009491   0.008499   0.007739 [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 6.36e-08 7.03e-08 5.55e-08 7.24e-08 2.16e-07 2.62e-07   erg/cm2
              Error 1.39e-08 1.38e-08 2.16e-08 5.41e-08 4.96e-08 8.34e-08   erg/cm2
Peak flux Power-law 4.62e-01 2.66e-01 9.66e-02 4.64e-02 8.49e-01 8.71e-01   ph/cm2/s
              Error 1.63e-01 8.85e-02 6.38e-02 6.20e-02 2.40e-01 2.51e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.27e-08 7.33e-08 5.32e-08 3.66e-08 2.09e-07 2.26e-07   erg/cm2
              Error 1.47e-08 1.79e-08 2.44e-08 6.80e-08 5.42e-08 9.54e-08   erg/cm2
Peak flux Cutoff-PL 4.49e-01 2.79e-01 9.72e-02 2.89e-02 8.44e-01 8.55e-01   ph/cm2/s
              Error 1.82e-01 1.11e-01 6.82e-02 6.08e-02 2.40e-01 2.56e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 4.46e-01 2.80e-01 9.82e-02 2.90e-02 8.44e-01 8.54e-01   ph/cm2/s
              Error -------- -------- 6.82e-02 6.08e-02 -------- 2.54e-01   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.341    0.386    -      -           2.81e-03 8.00e-04   45.140 57
CPL   1.952    0.000       4.7    0.0      4.88e-03 0.00e+00   44.990 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.459    0.713    -      -           4.43e-03 3.30e-03   55.680 57
CPL   1.857    0.000      10.2    0.0      9.83e-03 0.00e+00   55.620 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    8.000   -1.416    6.584
T90     7.000   -1.416    5.584
T50     4.000   -0.416    3.584
Peak    1.000   -0.416    0.584

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
   40.9352   -17.7806   0.0216    35.5738  -113.5179         0.4945639      8.884 TRIG_00515976                 
 
Foreground time interval of the image:
 -1.416   6.584 (delta_t =   8.000 [sec])
Background time interval of the image:
-515.215 -496.569 (delta_t =  18.646 [sec])
-239.416  -1.416 (delta_t = 238.000 [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 4.096000

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 4.096000

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 4.096000

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)

The mask-weighted light curves based on cleaned DPHs

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   -1.416 sec. to    6.584 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.34101     ( -0.355647   0.41549 )
Norm@50keV  : 2.80748E-03    ( -0.000812369   0.000788379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.14 using 59 PHA bins.
# Reduced chi-squared =         0.7919 for     57 degrees of freedom 
# Null hypothesis probability =   8.718559e-01
 
Photon flux (15-150 keV)    in 8 sec: 0.502076 ( -0.0871567  0.0871862 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.16335e-07 ( -4.8221e-08  5.09887e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.416 sec. to    6.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.95192     (     )
Epeak [keV] : 4.66570      (   )
Norm@50keV  : 4.88500E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.99 using 59 PHA bins.
# Reduced chi-squared =         0.8033 for     56 degrees of freedom 
# Null hypothesis probability =   8.539992e-01
 
Photon flux (15-150 keV)    in 8 sec: 0.497358 ( -0.088729  0.089053 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.08868e-07 ( -5.1808e-08  5.66768e-08 ) ergs/cm2

Band function

Time interval is from   -1.416 sec. to    6.584 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.93133   ( 1.93133   1.93133 )
beta        : -3.18487    ( 3.16139   12.9472 )
Epeak [keV] : 6.47350      ( -6.47256 62.6651 )
Norm@50keV   : 4.98936E-03    ( -0.00182671   0.00483571 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.99 using 59 PHA bins.
# Reduced chi-squared =         0.8180 for     55 degrees of freedom 
# Null hypothesis probability =   8.301023e-01
 
Photon flux (15-150 keV)    in 8 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]    : 8.25206  (-1.6858  1.92193)
R^2/D10^2   : 0.482140  (-0.270479   0.713848)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.48 using 59 PHA bins.
# Reduced chi-squared =         0.9207 for     57 degrees of freedom 
# Null hypothesis probability =   6.451475e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.856e-08   1.719e-08
25- 50  8.962e-08   2.843e-08
50-150  2.603e-08   1.452e-08
15-150  1.642e-07   5.408e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 39.3447       (-14.6856      28.3496)
Norm        : 3.28370       (-0.955569     1.55334)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.47 using 59 PHA bins.
# Reduced chi-squared =         0.7977 for     57 degrees of freedom 
# Null hypothesis probability =   8.641518e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.998e-08   1.416e-08
25- 50  7.835e-08   2.278e-08
50-150  5.952e-08   3.462e-08
15-150  1.979e-07   5.916e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.91290        (-1.19453      1.86216)
R1^2/D10^2  : 30.4847        (-28.1382      96.9288)
kT2 [keV]   : 11.3477        (-2.77366      5.1549)
R2^2/D10^2  : 0.111042    (-0.0860991   0.159561)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.50 using 59 PHA bins.
# Reduced chi-squared =         0.7908 for     55 degrees of freedom 
# Null hypothesis probability =   8.685294e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.191e-08   3.267e-08
25- 50  7.566e-08   4.232e-08
50-150  5.264e-08   3.324e-08
15-150  1.902e-07   1.015e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.416 sec. to    0.584 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.45904     ( -0.578123   0.847412 )
Norm@50keV  : 4.43184E-03    ( -0.00443184   0.00217024 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.68 using 59 PHA bins.
# Reduced chi-squared =         0.9769 for     57 degrees of freedom 
# Null hypothesis probability =   5.245289e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.849237 ( -0.239892  0.240118 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.38467e-08 ( -1.60816e-08  1.73665e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.416 sec. to    0.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85743     (     )
Epeak [keV] : 10.2406      (   )
Norm@50keV  : 9.83140E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.62 using 59 PHA bins.
# Reduced chi-squared =         0.9933 for     56 degrees of freedom 
# Null hypothesis probability =   4.890410e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.844217 ( -0.23831  0.241133 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.31821e-08 ( -1.56852e-08  1.77425e-08 ) ergs/cm2

Band function

Time interval is from   -0.416 sec. to    0.584 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.99716   ( -0.00284438   0.308264 )
beta        : -9.37167    ( 9.37167   19.3717 )
Epeak [keV] : 0.260974      ( -0.260974 -0.260974 )
Norm@50keV   : 8.22409E-03    ( -0.00230628   0.00230628 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.60 using 59 PHA bins.
# Reduced chi-squared =          1.011 for     55 degrees of freedom 
# Null hypothesis probability =   4.520216e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.844397 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.36338e-08 ( -4.36268e-08  -1.62485e-08 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.91617  (-3.26078  3.94251)
R^2/D10^2   : 0.601005  (-0.593594   3.002)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.51 using 59 PHA bins.
# Reduced chi-squared =          1.044 for     57 degrees of freedom 
# Null hypothesis probability =   3.844180e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.257e-09   5.665e-09
25- 50  1.939e-08   1.193e-08
50-150  7.187e-09   5.355e-09
15-150  3.583e-08   2.260e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 39.9614       (-21.4966      54.8438)
Norm        : 5.52474       (-2.28014     5.37314)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.90 using 59 PHA bins.
# Reduced chi-squared =         0.9808 for     57 degrees of freedom 
# Null hypothesis probability =   5.162443e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.268e-08   6.033e-09
25- 50  1.668e-08   9.095e-09
50-150  1.289e-08   1.013e-08
15-150  4.225e-08   2.286e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.02499        (-1.59487      2.23616)
R1^2/D10^2  : 698.998        (-1759.43      -1770.63)
kT2 [keV]   : 12.0714        (-4.00236      5.59559)
R2^2/D10^2  : 0.159627    (-0.144942   0.248758)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.55 using 59 PHA bins.
# Reduced chi-squared =         0.9554 for     55 degrees of freedom 
# Null hypothesis probability =   5.689692e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.208e-08   6.470e-09
25- 50  1.581e-08   1.022e-08
50-150  1.372e-08   1.022e-08
15-150  4.161e-08   2.283e-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: 2.34101     ( -0.355647   0.41549 )
Norm@50keV  : 2.80748E-03    ( -0.000812369   0.000788379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.14 using 59 PHA bins.
# Reduced chi-squared =         0.7919 for     57 degrees of freedom 
# Null hypothesis probability =   8.718559e-01
 
Photon flux (15-150 keV)    in 8 sec: 0.502076 ( -0.0871567  0.0871862 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.16335e-07 ( -4.8221e-08  5.09887e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.95192     (     )
Epeak [keV] : 4.66570      (   )
Norm@50keV  : 4.88500E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.99 using 59 PHA bins.
# Reduced chi-squared =         0.8033 for     56 degrees of freedom 
# Null hypothesis probability =   8.539992e-01
 
Photon flux (15-150 keV)    in 8 sec: 0.497358 ( -0.088729  0.089053 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.08868e-07 ( -5.1808e-08  5.66768e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.93133   ( 1.93133   1.93133 )
beta        : -3.18487    ( 3.16139   12.9472 )
Epeak [keV] : 6.47350      ( -6.47256 62.6651 )
Norm@50keV   : 4.98936E-03    ( -0.00182671   0.00461348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.99 using 59 PHA bins.
# Reduced chi-squared =         0.8180 for     55 degrees of freedom 
# Null hypothesis probability =   8.301023e-01
 
Photon flux (15-150 keV)    in 8 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)  = 7.03e-08
S(50-100 keV) = 5.55e-08

T90 vs. Hardness ratio plot

T90                                   = 7 sec.
Hardness ratio (energy fluence ratio) = 0.789474

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.07497
Count Ratio (50-100 keV) / (15-25 keV) = 0.305506

Mask shadow pattern

IMX = -2.854052604166931E-01, IMY = 6.558275520128743E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-515.215400 -496.569100
-239.416000 -1.416000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6336  22.0131    0.3  22.3   58.0  10.6004  44.0    0.1	Crab                          
 75.2035  27.5277    3.2  23.1   33.5   0.7689   3.6 ------	UNKNOWN                       
 68.3973  25.3142    2.4  19.9   18.0   0.9569   4.8 ------	UNKNOWN                       
 81.4657 -51.9624    2.6  58.4 -171.8   5.4540   4.5 ------	UNKNOWN                       
 43.5451 -41.1528    2.9  51.8 -138.6   4.5835   4.0 ------	UNKNOWN

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

Time interval of the image:
-1.416000 6.584000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.4896  22.1314    6.8  22.3   57.6  -0.0564  -1.7   10.6	Crab                          
109.1579   0.4680    3.1  41.1  113.2   0.4157   3.6 ------	UNKNOWN                       
103.3959 -31.4524    2.6  49.8  157.7   0.4279   4.4 ------	UNKNOWN                       
 40.9352 -17.7806    1.3  35.6 -113.5   0.4947   8.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
93.084600 962.645700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 43.6596 -46.1520    2.2  28.5  178.2   2.3995   5.3 ------	UNKNOWN                       
 33.7254 -74.6547    4.3  57.0 -175.6   5.6798   2.7 ------	UNKNOWN                       
 21.4382 -24.7601    2.8  19.5 -112.3   1.8800   4.1 ------	UNKNOWN                       
 16.0026  15.0251    2.8  41.0  -36.4   2.9549   4.2 ------	UNKNOWN                       
352.0843 -41.9545    3.4  48.0 -128.9   6.8738   3.4 ------	UNKNOWN

Plot creation:
Sat May 30 20:14:03 EDT 2015