batgrbproduct analysis for trigger=218582

batgrbproduct Analysis for Trigger=218582

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 May  9 19:42:43 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger218582
======================================================================

  Trigger: 00218582      Segment: 000

  BAT Trigger Time: 174431265.024   [s; MET]
      Trigger Stop: 174431291.904   [s; MET]
               UTC: 2006-07-12T21:07:43.711080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 184.061047100022   Dec: 35.5596913631098  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.67
     Image Trigger?:     NO
     Rate S/N Ratio:     10.3923048454133  [ if not an image trigger ]
     Image S/N Ratio:    6.67

  Flight Position:   [ source = BAT ]
    RA: 184.061047100022   Dec: 35.5596913631098  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 184.062138125809   Dec: 35.5481500472195  [deg; J2000]  
        { 12h 16m 14.9s , +35d 32' 53.3" }
         +/- 2.37215949182318 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.1859363488358 [arcmin] (formal 1-sigma fit error)
    SNR: 8.85520345110734
 
  Angular difference between Flight and Ground position is 0.694524 arcmin
 
  Partial Coding Fraction: 0.09570312    [ including projection effects ]

  Duration
     T90: 30.9120000004768 +/- 6.63041235721911
        Measured from: 2.83200001716614
                   to: 33.744000017643     [s; relative to TRIGTIME]
     T50: 13.7599999904633 +/- 7.10515306344147
        Measured from: 12.4960000216961
                   to: 26.2560000121593     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 16.7639999985695     
                   to: 17.7639999985695     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.592000007629395     
                   to: 38.7360000014305     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.620259   0.727489   0.487346   0.208240
           0.113049   0.118332   0.103771   0.088533 [error]
 Peak      0.077845   0.042344   0.061181   0.026251
           0.018959   0.018811   0.017213   0.014988 [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 2.03e-07 3.60e-07 4.89e-07 1.37e-06 1.42e-06 2.43e-06   erg/cm2
              Error 6.71e-08 6.98e-08 1.03e-07 6.66e-07 2.52e-07 7.21e-07   erg/cm2
Peak flux Power-law 6.80e-01 5.36e-01 2.84e-01 2.19e-01 1.60e+00 1.72e+00   ph/cm2/s
              Error 3.75e-01 1.89e-01 1.27e-01 1.92e-01 5.74e-01 5.82e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.05e-07 3.61e-07 4.88e-07 1.34e-06 1.41e-06 2.40e-06   erg/cm2
              Error 6.71e-08 6.82e-08 1.03e-07 -------- 2.49e-07 7.77e-07   erg/cm2
Peak flux Cutoff-PL 6.80e-01 5.36e-01 2.84e-01 2.17e-01 1.60e+00 1.72e+00   ph/cm2/s
              Error 4.08e-01 2.05e-01 1.47e-01 2.17e-01 5.86e-01 6.33e-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    1.557    0.321    -      -           3.95e-03 6.70e-04   57.980 57
CPL   1.569    0.324    9999.4    0.0      3.96e-03 1.93e-03   57.990 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.916    0.624    -      -           1.11e-02 3.99e-03   83.010 57
CPL   2.463    0.000     171.7    0.0      5.53e-03 0.00e+00   82.590 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   38.144    0.592   38.736
T90    30.912    2.832   33.744
T50    13.760   12.496   26.256
Peak    1.000   16.764   17.764

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
  184.0621    35.5482   0.0217    55.5548    -4.9746         2.2483836      8.855 TRIG_00218582                 
 
Foreground time interval of the image:
  0.592  38.736 (delta_t =  38.144 [sec])
Background time interval of the image:
-239.024   0.592 (delta_t = 239.616 [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 26.880000

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 26.880000

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 26.880000

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    0.592 sec. to   38.736 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55705     ( -0.322745   0.319848 )
Norm@50keV  : 3.94923E-03    ( -0.000670256   0.000669579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.98 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     57 degrees of freedom 
# Null hypothesis probability =   4.389729e-01
 
Photon flux (15-150 keV)    in 38.14 sec: 0.500975 ( -0.0937742  0.0944737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41658e-06 ( -2.51488e-07  2.52302e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.592 sec. to   38.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56925     ( -0.338226   0.308855 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 3.95624E-03    ( -0.000669862   0.00319573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.99 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     56 degrees of freedom 
# Null hypothesis probability =   4.016151e-01
 
Photon flux (15-150 keV)    in 38.14 sec: 0.507054 ( -0.101148  0.089346 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41455e-06 ( -2.49458e-07  2.48921e-07 ) ergs/cm2

Band function

Time interval is from    0.592 sec. to   38.736 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -1.59550    ( -0.351541   0.334562 )
Epeak [keV] : 21.4242      ( -21.424 9.0157 )
Norm@50keV   : 1155.33    ( -195.168   2.91199e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.39 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     55 degrees of freedom 
# Null hypothesis probability =   3.865997e-01
 
Photon flux (15-150 keV)    in 38.14 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]    : 14.3876  (-3.57475  5.72922)
R^2/D10^2   : 6.14545E-02  (-0.0605819   0.11292)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.36 using 59 PHA bins.
# Reduced chi-squared =          1.322 for     57 degrees of freedom 
# Null hypothesis probability =   5.216189e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.022e-07   3.936e-08
25- 50  3.904e-07   1.201e-07
50-150  5.394e-07   1.989e-07
15-150  1.032e-06   3.070e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (-96.4545      -199.363)
Norm        : 2.02907       (-0.346334     0.392899)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.49 using 59 PHA bins.
# Reduced chi-squared =          1.044 for     57 degrees of freedom 
# Null hypothesis probability =   3.851379e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.927e-07   1.138e-07
25- 50  3.707e-07   2.098e-07
50-150  8.130e-07   4.668e-07
15-150  1.376e-06   7.739e-07

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.01062        (-2.36344      2.86927)
R1^2/D10^2  : 0.295658        (-0.227502      0.406883)
kT2 [keV]   : 199.401        (      )
R2^2/D10^2  : 6.76132E-05    (-2.27789e-05   0.00206426)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.56 using 59 PHA bins.
#Fit statistic : Chi-Squared =          54.31 using 59 PHA bins.
# Reduced chi-squared =         0.9921 for     55 degrees of freedom 
# Reduced chi-squared =         0.9874 for     55 degrees of freedom 
# Null hypothesis probability =   4.912656e-01
# Null hypothesis probability =   5.010074e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.901e-07   1.138e-07
25- 50  3.967e-07   2.183e-07
50-150  8.240e-07   4.985e-07
15-150  1.411e-06   7.578e-07

Peak spectrum fit

Power-law model

Time interval is from   16.764 sec. to   17.764 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.91586     ( -0.567069   0.681793 )
Norm@50keV  : 1.10708E-02    ( -0.00411583   0.00386888 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.01 using 59 PHA bins.
# Reduced chi-squared =          1.456 for     57 degrees of freedom 
# Null hypothesis probability =   1.385796e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.59957 ( -0.570377  0.577631 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01801e-07 ( -3.56369e-08  3.57903e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   16.764 sec. to   17.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.46266     (     )
Epeak [keV] : 171.650      (   )
Norm@50keV  : 5.53465E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.59 using 59 PHA bins.
# Reduced chi-squared =          1.475 for     56 degrees of freedom 
# Null hypothesis probability =   1.194702e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.59913 ( -0.59467  0.57699 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01926e-07 ( -3.57748e-08  3.5659e-08 ) ergs/cm2

Band function

Time interval is from   16.764 sec. to   17.764 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -6.22441   ( 10.9636   6.22441 )
beta        : -1.91587    ( -0.681783   0.566957 )
Epeak [keV] : 77.3221      ( -77.3221 -77.3221 )
Norm@50keV   : 1.50467    ( -0.559446   0.525848 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.01 using 59 PHA bins.
# Reduced chi-squared =          1.509 for     55 degrees of freedom 
# Null hypothesis probability =   8.685549e-03
 
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]    : 13.9198  (-5.03564  8.42727)
R^2/D10^2   : 0.213434  (-0.211978   0.912535)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.26 using 59 PHA bins.
# Reduced chi-squared =          1.513 for     57 degrees of freedom 
# Null hypothesis probability =   7.423365e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.740e-09   5.655e-09
25- 50  3.232e-08   2.000e-08
50-150  4.112e-08   2.869e-08
15-150  8.218e-08   5.285e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 104.525       (-66.2236      -104.822)
Norm        : 6.93825       (-2.73881     4.77717)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.22 using 59 PHA bins.
# Reduced chi-squared =          1.460 for     57 degrees of freedom 
# Null hypothesis probability =   1.332406e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.813e-08   1.151e-08
25- 50  3.163e-08   2.007e-08
50-150  5.254e-08   3.959e-08
15-150  1.023e-07   7.060e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.91319        (-1.67492      9.14862)
R1^2/D10^2  : 125.788        (-125.654      105586)
kT2 [keV]   : 18.2660        (-7.13139      76.7093)
R2^2/D10^2  : 6.94117E-02    (-0.0618238   0.106175)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.36 using 59 PHA bins.
# Reduced chi-squared =          1.497 for     55 degrees of freedom 
# Null hypothesis probability =   9.864135e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.417e-08   1.348e-08
25- 50  2.414e-08   1.436e-08
50-150  5.245e-08   3.502e-08
15-150  1.008e-07   5.665e-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: 1.55705     ( -0.322745   0.319848 )
Norm@50keV  : 3.94923E-03    ( -0.000670256   0.000669579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.98 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     57 degrees of freedom 
# Null hypothesis probability =   4.389729e-01
 
Photon flux (15-150 keV)    in 38.14 sec: 0.500975 ( -0.0937742  0.0944737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41658e-06 ( -2.51488e-07  2.52302e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56925     ( -0.338226   0.308855 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 3.95624E-03    ( -0.000669862   0.00319573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.99 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     56 degrees of freedom 
# Null hypothesis probability =   4.016151e-01
 
Photon flux (15-150 keV)    in 38.14 sec: 0.507054 ( -0.101148  0.089346 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41455e-06 ( -2.49458e-07  2.48921e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -1.59550    ( -0.351541   0.334562 )
Epeak [keV] : 21.4242      ( -21.424 9.0157 )
Norm@50keV   : 1155.33    ( -195.168   2.91199e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.39 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     55 degrees of freedom 
# Null hypothesis probability =   3.865997e-01
 
Photon flux (15-150 keV)    in 38.14 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)  = 3.60e-07
S(50-100 keV) = 4.89e-07

T90 vs. Hardness ratio plot

T90                                   = 30.9120000004768 sec.
Hardness ratio (energy fluence ratio) = 1.35833

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.17288
Count Ratio (50-100 keV) / (15-25 keV) = 0.785714

Mask shadow pattern

IMX = 1.452503442940376E+00, IMY = 1.264288181916121E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000

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:
-239.024000 0.592000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5350 -40.5531    0.9  32.8 -178.2   2.4981  13.1    0.3	Vela X-1                      
170.2654 -60.5567    4.6  47.2  141.2   1.5575   2.5    4.2	Cen X-3                       
186.7422  29.2140    2.5  51.5    1.7   1.9790   4.6 ------	UNKNOWN                       
 99.7367 -48.7220    2.6  58.6 -169.5   4.3964   4.4 ------	UNKNOWN                       
144.8046  34.8111    2.5  50.6  -44.7   4.0874   4.6 ------	UNKNOWN

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

Time interval of the image:
0.592000 38.736000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5071 -40.5048 1410.3  32.8 -178.1   0.0005   0.0    3.2	Vela X-1                      
170.1227 -60.7386    6.2  47.3  141.3   0.4303   1.8    9.0	Cen X-3                       
168.7050  15.8056    2.7  31.8  -10.9   0.2788   4.3 ------	UNKNOWN                       
184.0621  35.5482    1.3  55.6   -5.0   2.2484   8.9 ------	UNKNOWN                       
111.1087 -15.3879    3.0  45.3 -128.3   0.6826   3.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
167.476610 723.016000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
178.6277   3.7948    2.7  32.2 -178.5   3.4286   4.2 ------	UNKNOWN                       
178.6121  10.4261    2.5  25.6 -176.3   3.3050   4.5 ------	UNKNOWN                       
167.5008   7.9524    3.2  31.5 -156.1   3.0657   3.6 ------	UNKNOWN                       
163.5129   4.0085    3.0  36.8 -153.0   3.6898   3.9 ------	UNKNOWN                       
155.1942  -2.6856    2.7  46.8 -147.4   7.2720   4.2 ------	UNKNOWN

Plot creation:
Sun May 31 12:40:41 EDT 2015