batgrbproduct analysis for trigger=602604

batgrbproduct Analysis for Trigger=602604

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): Sat Oct  4 22:03:00 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger602604
======================================================================

  Trigger: 00602604      Segment: 000

  BAT Trigger Time: 425435593.984   [s; MET]
      Trigger Stop: 425435602.176   [s; MET]
               UTC: 2014-06-26T00:33:01.797720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 77.3504863959002   Dec: -82.6298888891504  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.59
     Image Trigger?:     NO
     Rate S/N Ratio:     15.9687194226713  [ if not an image trigger ]
     Image S/N Ratio:    11.59

  Flight Position:   [ source = BAT ]
    RA: 77.3504863959002   Dec: -82.6298888891504  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 77.1620136909233   Dec: -82.6236753841851  [deg; J2000]  
        { 05h 08m 38.9s , -82d 37' 25.2" }
         +/- 1.50289262898903 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.520444879200264 [arcmin] (formal 1-sigma fit error)
    SNR: 16.9966824039363
 
  Angular difference between Flight and Ground position is 1.498346 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 16.1599999666214 +/- 1.23416207233031
        Measured from: -7.87200003862381
                   to: 8.28799992799759     [s; relative to TRIGTIME]
     T50: 8.99199992418289 +/- 2.40738281438328
        Measured from: -3.22000002861023
                   to: 5.77199989557266     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5.68399995565414     
                   to: 6.68399995565414     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.46000003814697     
                   to: 9.08399999141693     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.245107   0.321828   0.150311   0.030122
           0.024086   0.024707   0.021295   0.018850 [error]
 Peak      0.025760   0.032175   0.018566   0.008031
           0.006015   0.006278   0.005232   0.004644 [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 7.96e-08 1.15e-07 1.24e-07 2.49e-07 3.96e-07 5.68e-07   erg/cm2
              Error 1.07e-08 1.10e-08 1.96e-08 7.76e-08 4.58e-08 9.90e-08   erg/cm2
Peak flux Power-law 2.67e-01 2.21e-01 1.25e-01 1.04e-01 6.59e-01 7.16e-01   ph/cm2/s
              Error 8.09e-02 4.70e-02 4.25e-02 6.82e-02 1.40e-01 1.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.06e-08 1.33e-07 1.18e-07 4.25e-08 3.53e-07 3.64e-07   erg/cm2
              Error 1.24e-08 1.55e-08 2.39e-08 5.76e-08 4.79e-08 6.90e-08   erg/cm2
Peak flux Cutoff-PL 2.58e-01 2.32e-01 1.25e-01 6.28e-02 6.52e-01 6.78e-01   ph/cm2/s
              Error 8.91e-02 6.12e-02 4.63e-02 8.99e-02 1.06e-01 1.74e-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    1.893    0.172    -      -           2.46e-03 2.85e-04   55.770 57
CPL   0.617    0.874      45.7   10.2      1.31e-02 2.28e-02   47.640 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.830    0.392    -      -           4.72e-03 1.24e-03   55.850 57
CPL   1.473    1.322      63.7   -0.1      7.57e-03 4.64e-02   55.670 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: 18.112000 sec.
T50 in the 50-300 keV band: 10.432000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   17.544   -8.460    9.084
T90    16.160   -7.872    8.288
T50     8.992   -3.220    5.772
Peak    1.000    5.684    6.684

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
   77.1620   -82.6237   0.0112    13.5753    -9.1241         0.8102696     16.997 TRIG_00602604                 
 
Foreground time interval of the image:
 -8.460   9.084 (delta_t =  17.544 [sec])
Background time interval of the image:
-239.984  -8.460 (delta_t = 231.524 [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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

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   -8.460 sec. to    9.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89254     ( -0.167795   0.17557 )
Norm@50keV  : 2.45608E-03    ( -0.000287754   0.000283001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.77 using 59 PHA bins.
# Reduced chi-squared =         0.9784 for     57 degrees of freedom 
# Null hypothesis probability =   5.214297e-01
 
Photon flux (15-150 keV)    in 17.54 sec: 0.351363 ( -0.0333893  0.033394 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.96034e-07 ( -4.52793e-08  4.62472e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -8.460 sec. to    9.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.617218     ( -0.950894   0.797244 )
Epeak [keV] : 45.6669      ( -7.52718 12.8594 )
Norm@50keV  : 1.31175E-02    ( -0.0131175   0.0324608 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.64 using 59 PHA bins.
# Reduced chi-squared =         0.8508 for     56 degrees of freedom 
# Null hypothesis probability =   7.790281e-01
 
Photon flux (15-150 keV)    in 17.54 sec: 0.335497 ( -0.034334  0.034477 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53199e-07 ( -4.58566e-08  4.99785e-08 ) ergs/cm2

Band function

Time interval is from   -8.460 sec. to    9.084 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.616542   ( -0.871397   1.05342 )
beta        : -9.91636    ( 4.83484   14.8348 )
Epeak [keV] : 45.6506      ( -4.70976 12.8821 )
Norm@50keV   : 1.31310E-02    ( -0.00404447   0.0342 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.64 using 59 PHA bins.
# Reduced chi-squared =         0.8662 for     55 degrees of freedom 
# Null hypothesis probability =   7.489130e-01
 
Photon flux (15-150 keV)    in 17.54 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]    : 10.9310  (-1.10609  1.22864)
R^2/D10^2   : 0.121246  (-0.0400242   0.0596827)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.83 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     57 degrees of freedom 
# Null hypothesis probability =   4.081235e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.303e-08   9.296e-09
25- 50  1.487e-07   1.711e-08
50-150  9.990e-08   2.343e-08
15-150  3.017e-07   3.806e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 75.9271       (-19.5032      31.9545)
Norm        : 1.69287       (-0.228449     0.271269)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.64 using 59 PHA bins.
# Reduced chi-squared =         0.8709 for     57 degrees of freedom 
# Null hypothesis probability =   7.448109e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.676e-08   9.656e-09
25- 50  1.247e-07   1.306e-08
50-150  1.699e-07   6.939e-08
15-150  3.714e-07   6.481e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.58629        (-1.98807      2.51113)
R1^2/D10^2  : 1.48792        (-1.15233      4.71137)
kT2 [keV]   : 14.1642        (-2.44313      4.45851)
R2^2/D10^2  : 3.79440E-02    (-0.027351   0.0473023)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.57 using 59 PHA bins.
# Reduced chi-squared =         0.8467 for     55 degrees of freedom 
# Null hypothesis probability =   7.837461e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.252e-08   3.553e-08
25- 50  1.293e-07   6.538e-08
50-150  1.415e-07   7.256e-08
15-150  3.432e-07   1.428e-07

Peak spectrum fit

Power-law model

Time interval is from    5.684 sec. to    6.684 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.82984     ( -0.371696   0.412039 )
Norm@50keV  : 4.72449E-03    ( -0.00126582   0.00120564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.85 using 59 PHA bins.
# Reduced chi-squared =         0.9797 for     57 degrees of freedom 
# Null hypothesis probability =   5.184696e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.658710 ( -0.139781  0.139781 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.34564e-08 ( -1.1278e-08  1.17227e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    5.684 sec. to    6.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47300     ( -1.88727   0.75636 )
Epeak [keV] : 63.7107      ( -63.5861 -63.7284 )
Norm@50keV  : 7.56512E-03    ( -0.00756192   0.0851721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.67 using 59 PHA bins.
# Reduced chi-squared =         0.9942 for     56 degrees of freedom 
# Null hypothesis probability =   4.871498e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.652375 ( -0.141943  0.070976 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.20072e-08 ( -1.2179e-08  1.27672e-08 ) ergs/cm2

Band function

Time interval is from    5.684 sec. to    6.684 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.37678   ( 1.37698   1.37698 )
beta        : -2.33906    ( 2.39617   11.6644 )
Epeak [keV] : 60.1571      ( -61.1212 -61.1212 )
Norm@50keV   : 8.52217E-03    ( -0.00447493   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.67 using 59 PHA bins.
# Reduced chi-squared =          1.012 for     55 degrees of freedom 
# Null hypothesis probability =   4.494759e-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]    : 10.9254  (-2.71898  3.58682)
R^2/D10^2   : 0.226251  (-0.146603   0.420747)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.14 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     57 degrees of freedom 
# Null hypothesis probability =   3.296487e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.635e-09   1.988e-09
25- 50  1.579e-08   6.299e-09
50-150  1.059e-08   5.522e-09
15-150  3.202e-08   1.088e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 90.7936       (-46.2369      -90.7936)
Norm        : 3.00226       (-0.74513     1.13069)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.71 using 59 PHA bins.
# Reduced chi-squared =         0.9774 for     57 degrees of freedom 
# Null hypothesis probability =   5.234117e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.836e-09   2.486e-09
25- 50  1.328e-08   6.187e-09
50-150  2.033e-08   1.616e-08
15-150  4.144e-08   2.477e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.19582        (-3.58366      4.65065)
R1^2/D10^2  : 2.28197        (-1.96713      1369.11)
kT2 [keV]   : 18.4599        (-7.62541      180.652)
R2^2/D10^2  : 2.47713E-02    (-0.0242432   0.193976)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.86 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     55 degrees of freedom 
# Null hypothesis probability =   4.422713e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.132e-09   4.758e-09
25- 50  1.253e-08   6.245e-09
50-150  1.988e-08   1.246e-08
15-150  4.054e-08   2.182e-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: 1.89254     ( -0.167795   0.17557 )
Norm@50keV  : 2.45608E-03    ( -0.000287754   0.000283001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.77 using 59 PHA bins.
# Reduced chi-squared =         0.9784 for     57 degrees of freedom 
# Null hypothesis probability =   5.214297e-01
 
Photon flux (15-150 keV)    in 17.54 sec: 0.351363 ( -0.0333893  0.033394 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.96034e-07 ( -4.52793e-08  4.62472e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.617218     ( -0.950894   0.797244 )
Epeak [keV] : 45.6669      ( -7.52718 12.8594 )
Norm@50keV  : 1.31175E-02    ( -0.0131175   0.0324608 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.64 using 59 PHA bins.
# Reduced chi-squared =         0.8508 for     56 degrees of freedom 
# Null hypothesis probability =   7.790281e-01
 
Photon flux (15-150 keV)    in 17.54 sec: 0.335497 ( -0.034334  0.034477 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53199e-07 ( -4.58566e-08  4.99785e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.616542   ( -0.871397   1.05342 )
beta        : -9.91636    ( 4.83484   14.8348 )
Epeak [keV] : 45.6506      ( -4.70976 12.8821 )
Norm@50keV   : 1.31310E-02    ( -0.00404449   0.0342095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.64 using 59 PHA bins.
# Reduced chi-squared =         0.8662 for     55 degrees of freedom 
# Null hypothesis probability =   7.489130e-01
 
Photon flux (15-150 keV)    in 17.54 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)  = 1.15e-07
S(50-100 keV) = 1.24e-07

T90 vs. Hardness ratio plot

T90                                   = 16.1599999666214 sec.
Hardness ratio (energy fluence ratio) = 1.07826

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.31301
Count Ratio (50-100 keV) / (15-25 keV) = 0.613246

Mask shadow pattern

IMX = 2.384144820168048E-01, IMY = 3.829060910223910E-02

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-239.984000 -8.460000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.4324 -60.7942    0.0  44.0   -4.2   0.5226   1.6   10.8	Cen X-3                       
186.5085 -62.9151    3.6  43.1    7.1   1.0143   3.2    9.6	GX 301-2                      
328.9629 -84.1305    3.3  13.7   37.7   0.6701   3.5 ------	UNKNOWN                       
177.4262 -50.1501    2.9  55.1   -1.6   2.5945   3.9 ------	UNKNOWN                       
 25.0685 -14.8405   13.7  58.8 -159.3   1.3490   0.8 ------	UNKNOWN

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

Time interval of the image:
-8.460000 9.084000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2455 -60.5871    9.8  44.1   -4.4  -0.0971  -1.2    3.0	Cen X-3                       
186.8997 -62.7859    6.1  43.3    7.4  -0.1626  -1.9    6.7	GX 301-2                      
324.1964 -43.3592    2.4  39.9  123.4   0.7041   4.7 ------	UNKNOWN                       
348.6538 -36.4605    2.1  40.6  154.4   0.5319   5.7 ------	UNKNOWN                       
 77.1620 -82.6237    0.7  13.6   -9.1   0.8103  17.0 ------	UNKNOWN                       
149.8328 -52.1494    2.3  49.4  -22.3   0.5323   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
84.116600 962.153500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5363 -40.5444    2.7  45.9  -42.4   7.1643   4.2    0.7	Vela X-1                      
170.2188 -60.6553    3.3  30.5   -0.9   2.4305   3.5    3.4	Cen X-3                       
186.6210 -62.7083    5.3  30.5   14.9   1.4849   2.2    3.8	GX 301-2                      
210.5788 -44.2018    3.0  51.1   31.4  14.0461   3.8 ------	UNKNOWN                       
202.8947 -61.7611    2.8  33.0   28.6   3.2041   4.1 ------	UNKNOWN                       
173.5079 -45.1136    2.8  46.1   -3.1   4.0640   4.1 ------	UNKNOWN                       
 27.7086 -26.6513    4.4  58.7 -159.3  13.8707   2.6 ------	UNKNOWN

Plot creation:
Sat May 30 13:15:08 EDT 2015