batgrbproduct Analysis for Trigger=516997

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jan 13 06:09:51 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger516997
======================================================================

  Trigger: 00516997      Segment: 000

  BAT Trigger Time: 352669058.068   [s; MET]
      Trigger Stop: 352669058.132   [s; MET]
               UTC: 2012-03-05T19:37:30.107140    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 47.5464362623518   Dec: 28.4934691193433  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    18.18
     Image Trigger?:     NO
     Rate S/N Ratio:     186.566342087741  [ if not an image trigger ]
     Image S/N Ratio:    18.18

  Flight Position:   [ source = BAT ]
    RA: 47.5464362623518   Dec: 28.4934691193433  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 47.5489609882108   Dec: 28.494791756286  [deg; J2000]  
        { 03h 10m 11.8s , +28d 29' 41.3" }
         +/- 0.927685758260998 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.269958629434275 [arcmin] (formal 1-sigma fit error)
    SNR: 33.8601235139361
 
  Angular difference between Flight and Ground position is 0.154991 arcmin
 
  Partial Coding Fraction: 0.921875    [ including projection effects ]

  Duration
     T90: 0.0999999046325684 +/- 0.0120000243186951
        Measured from: 0.00400000810623169
                   to: 0.1039999127388     [s; relative to TRIGTIME]
     T50: 0.0279999375343323 +/- 0.00565686571343518
        Measured from: 0.0199999809265137
                   to: 0.0479999184608459     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.434000015258789     
                   to: 0.565999984741211     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.12799996137619     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.052298   0.097002   0.099583   0.033456
           0.003540   0.004716   0.005186   0.004097 [error]
 Peak      0.054310   0.103196   0.103130   0.031328
           0.005824   0.006688   0.006726   0.005624 [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 1.46e-08 3.66e-08 7.36e-08 3.71e-07 1.98e-07 4.95e-07   erg/cm2
              Error 1.40e-09 2.13e-09 4.68e-09 5.24e-08 1.23e-08 5.55e-08   erg/cm2
Peak flux Power-law 5.08e-01 6.73e-01 6.55e-01 1.14e+00 2.21e+00 2.98e+00   ph/cm2/s
              Error 6.82e-02 5.45e-02 5.18e-02 1.95e-01 1.53e-01 2.34e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.37e-08 3.78e-08 7.58e-08 2.30e-07 1.94e-07 3.58e-07   erg/cm2
              Error 1.66e-09 2.55e-09 5.36e-09 1.22e-07 1.35e-08 1.09e-07   erg/cm2
Peak flux Cutoff-PL 4.86e-01 6.84e-01 6.69e-01 9.01e-01 2.19e+00 2.74e+00   ph/cm2/s
              Error 8.10e-02 6.04e-02 6.09e-02 3.73e-01 1.57e-01 4.11e-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    0.992    0.089    -      -           1.43e-01 7.49e-03   64.320 57
CPL   0.675    0.356     222.9  -65.2      2.04e-01 7.81e-02   61.830 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.039    0.121    -      -           1.92e-02 1.31e-03   52.630 57
CPL   0.838    0.375     313.2    0.0      2.39e-02 1.09e-02   52.050 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.128    0.000    0.128
T90     0.100    0.004    0.104
T50     0.028    0.020    0.048
Peak    1.000   -0.434    0.566
  • 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
       47.5490    28.4948   0.0057    11.3491   109.5526         0.2940537     33.860 TRIG_00516997                 
     
    Foreground time interval of the image:
      0.000   0.128 (delta_t =   0.128 [sec])
    Background time interval of the image:
    -657.567 -640.191 (delta_t =  17.377 [sec])
    -239.068   0.000 (delta_t = 239.068 [sec])
    

    Lightcurves

    Notes:

    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 0.064000
    

    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 0.064000
    

    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 0.064000
    

    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:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from    0.000 sec. to    0.128 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.992083     ( -0.089597   0.0891914 )
    Norm@50keV  : 0.143079    ( -0.00748925   0.00748869 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          64.32 using 59 PHA bins.
    # Reduced chi-squared =          1.128 for     57 degrees of freedom 
    # Null hypothesis probability =   2.358180e-01
     
    Photon flux (15-150 keV)    in 0.128 sec: 16.4660 ( -0.86223  0.861478 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.98456e-07 ( -1.21697e-08  1.2523e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.000 sec. to    0.128 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.675105     ( -0.372192   0.339679 )
    Epeak [keV] : 222.885      ( -92.5833 -222.887 )
    Norm@50keV  : 0.203660    ( -0.0554945   0.10073 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          61.83 using 59 PHA bins.
    # Reduced chi-squared =          1.104 for     56 degrees of freedom 
    # Null hypothesis probability =   2.758933e-01
     
    Photon flux (15-150 keV)    in 0.128 sec: 16.2966 ( -0.8846  0.8821 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.94264e-07 ( 0  0 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.000 sec. to    0.128 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.86977   ( -4.831   -4.86977 )
    beta        : -1.09284    ( -0.107321   0.104857 )
    Epeak [keV] : 28.9767      ( -4.34796 3.92911 )
    Norm@50keV   : 3452.23    ( -179.9   10121.6 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          56.79 using 59 PHA bins.
    # Reduced chi-squared =          1.032 for     55 degrees of freedom 
    # Null hypothesis probability =   4.083016e-01
     
    Photon flux (15-150 keV)    in 0.128 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]    : 19.9704  (  )
    R^2/D10^2   : 0.805583  (   )
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         117.60 using 59 PHA bins.
    # Reduced chi-squared =         2.0631 for     57 degrees of freedom 
    # Null hypothesis probability =   4.226049e-06
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.932e-09   7.795e-10
    25- 50  3.947e-08   2.746e-09
    50-150  1.167e-07   1.147e-08
    15-150  1.641e-07   1.139e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 199.363       (      )
    Norm        : 62.7244       (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         154.92 using 59 PHA bins.
    # Reduced chi-squared =         2.7180 for     57 degrees of freedom 
    # Null hypothesis probability =   5.444918e-11
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.999e-08   1.158e-09
    25- 50  3.846e-08   3.002e-09
    50-150  8.435e-08   1.969e-08
    15-150  1.428e-07   2.775e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 9.48863        (-2.15228      2.54836)
    R1^2/D10^2  : 4.78057        (-2.12988      4.83058)
    kT2 [keV]   : 38.8362        (-9.40564      28.6112)
    R2^2/D10^2  : 8.36656E-02    (-0.0644068   0.068091)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.90 using 59 PHA bins.
    # Reduced chi-squared =          1.089 for     55 degrees of freedom 
    # Null hypothesis probability =   3.024564e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.313e-08   2.838e-09
    25- 50  3.973e-08   7.885e-09
    50-150  1.439e-07   6.129e-08
    15-150  1.968e-07   6.630e-08
    

    Peak spectrum fit

    Power-law model
    Time interval is from   -0.434 sec. to    0.566 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.03872     ( -0.12135   0.119932 )
    Norm@50keV  : 1.91597E-02    ( -0.00130952   0.00130942 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          52.63 using 59 PHA bins.
    # Reduced chi-squared =         0.9234 for     57 degrees of freedom 
    # Null hypothesis probability =   6.395168e-01
     
    Photon flux (15-150 keV)    in 1 sec: 2.21106 ( -0.152661  0.152729 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.04411e-07 ( -1.60604e-08  1.6176e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.434 sec. to    0.566 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.838242     ( -0.489828   0.259231 )
    Epeak [keV] : 313.177      ( -313.178 -313.178 )
    Norm@50keV  : 2.38622E-02    ( -0.00574322   0.0161506 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          52.05 using 59 PHA bins.
    # Reduced chi-squared =         0.9295 for     56 degrees of freedom 
    # Null hypothesis probability =   6.250831e-01
     
    Photon flux (15-150 keV)    in 1 sec: 2.19361 ( -0.15764  0.15735 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.01666e-07 ( -1.7547e-08  1.7358e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.434 sec. to    0.566 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.96198   ( -14.7043   -4.96198 )
    beta        : -1.11464    ( -0.168966   0.136823 )
    Epeak [keV] : 27.5069      ( -8.80222 5.56648 )
    Norm@50keV   : 737.677    ( -50.2764   9237.1 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          49.75 using 59 PHA bins.
    # Reduced chi-squared =         0.9045 for     55 degrees of freedom 
    # Null hypothesis probability =   6.748792e-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]    : 20.2094  (-1.90912  2.17676)
    R^2/D10^2   : 0.101830  (-0.0279335   0.0375566)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          89.15 using 59 PHA bins.
    # Reduced chi-squared =          1.564 for     57 degrees of freedom 
    # Null hypothesis probability =   4.143095e-03
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.984e-09   1.140e-09
    25- 50  4.004e-08   3.805e-09
    50-150  1.214e-07   1.490e-08
    15-150  1.694e-07   1.510e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (      )
    Norm        : 8.76809       (-0.623768     0.623768)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          97.61 using 59 PHA bins.
    # Reduced chi-squared =          1.712 for     57 degrees of freedom 
    # Null hypothesis probability =   6.555106e-04
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.182e-08   1.870e-09
    25- 50  4.199e-08   6.280e-09
    50-150  9.208e-08   3.153e-08
    15-150  1.559e-07   4.588e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 8.94286        (-2.43014      3.06207)
    R1^2/D10^2  : 0.792909        (-0.429258      1.18526)
    kT2 [keV]   : 37.8073        (-10.0534      37.239)
    R2^2/D10^2  : 1.20762E-02    (-0.0100085   0.0203814)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          51.30 using 59 PHA bins.
    # Reduced chi-squared =         0.9327 for     55 degrees of freedom 
    # Null hypothesis probability =   6.169295e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.462e-08   4.815e-09
    25- 50  4.144e-08   1.251e-08
    50-150  1.480e-07   6.767e-08
    15-150  2.041e-07   7.637e-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: 0.992083     ( -0.089597   0.0891914 )
    Norm@50keV  : 0.143079    ( -0.00748925   0.00748869 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          64.32 using 59 PHA bins.
    # Reduced chi-squared =          1.128 for     57 degrees of freedom 
    # Null hypothesis probability =   2.358180e-01
     
    Photon flux (15-150 keV)    in 0.128 sec: 16.4660 ( -0.86223  0.861478 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.98456e-07 ( -1.21697e-08  1.2523e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.675105     ( -0.372192   0.339679 )
    Epeak [keV] : 222.885      ( -92.5833 -222.887 )
    Norm@50keV  : 0.203660    ( -0.0554945   0.10073 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          61.83 using 59 PHA bins.
    # Reduced chi-squared =          1.104 for     56 degrees of freedom 
    # Null hypothesis probability =   2.758933e-01
     
    Photon flux (15-150 keV)    in 0.128 sec: 16.2966 ( -0.8846  0.8821 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.94264e-07 ( 0  0 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.86977   ( -4.83102   -4.86977 )
    beta        : -1.09284    ( -0.107321   0.104857 )
    Epeak [keV] : 28.9767      ( -4.34796 3.92911 )
    Norm@50keV   : 3452.23    ( -179.9   10121.6 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          56.79 using 59 PHA bins.
    # Reduced chi-squared =          1.032 for     55 degrees of freedom 
    # Null hypothesis probability =   4.083016e-01
     
    Photon flux (15-150 keV)    in 0.128 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)  = 3.66e-08
    S(50-100 keV) = 7.36e-08
    

    T90 vs. Hardness ratio plot

    T90                                   = 0.0999999046325684 sec.
    Hardness ratio (energy fluence ratio) = 2.01093
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.85479
    Count Ratio (50-100 keV) / (15-25 keV) = 1.90415
    

    Mask shadow pattern

    IMX = -6.717245590820499E-02, IMY = -1.891371247912358E-01
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    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:
    -657.567400 -640.190500
    -239.068000 0.000000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    326.1660  38.2232    4.6  58.8  -20.7   3.0771   2.5    5.9	Cyg X-2                       
     10.3249  66.6781    2.7  44.2   24.5   1.5516   4.3 ------	UNKNOWN                       
     75.1851  -4.5296    2.9  48.9  160.4   2.9520   4.0 ------	UNKNOWN                       
     10.5027  47.4878    2.4  29.6    3.4   0.9683   4.9 ------	UNKNOWN                       
    338.3605  46.8582    2.5  49.5  -10.5   1.7101   4.6 ------	UNKNOWN                       
     49.6163 -24.2463    2.9  51.5 -158.3   2.0616   4.0 ------	UNKNOWN                       
     31.7743 -12.1515    3.1  37.6 -135.9   1.2198   3.7 ------	UNKNOWN                       
     35.8994 -27.8760    3.3  53.2 -142.2   3.4967   3.5 ------	UNKNOWN                       
    354.4565   7.8306    2.8  42.7  -68.5   3.9896   4.1  575.1	UNKNOWN                       
     25.1472 -21.5895    3.0  48.0 -128.8   3.1938   3.9 ------	UNKNOWN                       
    

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

    Time interval of the image:
    0.000000 0.128000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    326.1591  38.3321    5.4  58.8  -20.5   0.1130   2.1    0.9	Cyg X-2                       
     47.5490  28.4948    0.3  11.3  109.6   0.2941  33.9 ------	UNKNOWN                       
     13.0763 -10.2408    2.1  41.7 -107.5   0.1732   5.6 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    51.832600 662.964900
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6409  22.0128    0.5  33.2  113.3  24.7545  24.3    0.4	Crab                          
     36.2541  72.7945    2.9  44.7   15.7   3.9846   4.0 ------	UNKNOWN                       
     51.3681 -25.4206    3.0  54.0 -163.9   6.3668   3.8 ------	UNKNOWN                       
    337.9465  54.9533    2.9  55.5  -20.4   7.2141   3.9 ------	UNKNOWN                       
     24.5315 -14.0155    2.5  48.0 -128.9  10.8692   4.6 ------	UNKNOWN                       
    349.5269  33.7644    3.4  49.3  -48.1  10.1321   3.4 ------	UNKNOWN                       
    
    Plot creation:
    Sat May 30 20:10:15 EDT 2015