batgrbproduct analysis for trigger=554996

batgrbproduct Analysis for Trigger=554996

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 12 03:53:02 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger554996
======================================================================

  Trigger: 00554996      Segment: 000

  BAT Trigger Time: 389209841.152   [s; MET]
      Trigger Stop: 389209841.216   [s; MET]
               UTC: 2013-05-02T17:50:30.642920    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 138.577789038498   Dec: -0.143261927772071  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.75
     Image Trigger?:     NO
     Rate S/N Ratio:     13.076696830622  [ if not an image trigger ]
     Image S/N Ratio:    7.75

  Flight Position:   [ source = BAT ]
    RA: 138.577789038498   Dec: -0.143261927772071  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 138.576416102131   Dec: -0.143687216245506  [deg; J2000]  
        { 09h 14m 18.3s , -00d 08' 37.3" }
         +/- 1.89503469948159 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.923253093726447 [arcmin] (formal 1-sigma fit error)
    SNR: 12.2045684545505
 
  Angular difference between Flight and Ground position is 0.086238 arcmin
 
  Partial Coding Fraction: 0.4726562    [ including projection effects ]

  Duration
     T90: 7.567999958992 +/- 4.44984135991245
        Measured from: -0.100000023841858
                   to: 7.46799993515015     [s; relative to TRIGTIME]
     T50: 2.33199995756149 +/- 0.456508505864197
        Measured from: 0.167999982833862
                   to: 2.49999994039536     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.216000020503998     
                   to: 0.783999979496002     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.196000039577484     
                   to: 10.2039999961853     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.243782   0.255007   0.203317   0.020296
           0.031770   0.033184   0.030699   0.031037 [error]
 Peak      0.084963   0.127071   0.105184   0.016687
           0.011129   0.012343   0.011447   0.010026 [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 8.36e-08 1.24e-07 1.37e-07 2.84e-07 4.31e-07 6.29e-07   erg/cm2
              Error 1.70e-08 1.65e-08 3.01e-08 1.28e-07 6.90e-08 1.58e-07   erg/cm2
Peak flux Power-law 1.10e+00 9.72e-01 5.88e-01 5.38e-01 2.89e+00 3.20e+00   ph/cm2/s
              Error 1.81e-01 1.07e-01 9.03e-02 1.58e-01 3.17e-01 3.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.25e-08 1.26e-07 1.37e-07 2.29e-07 4.26e-07 5.73e-07   erg/cm2
              Error 1.88e-08 2.01e-08 3.10e-08 2.13e-07 7.57e-08 2.18e-07   erg/cm2
Peak flux Cutoff-PL 9.47e-01 1.09e+00 6.25e-01 1.85e-01 2.80e+00 2.85e+00   ph/cm2/s
              Error 2.11e-01 1.39e-01 1.07e-01 -------- 3.23e-01 3.53e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 9.60e-01 1.08e+00 6.29e-01 2.12e-01 2.82e+00 2.88e+00   ph/cm2/s
              Error 2.08e-01 -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.856    0.257    -      -           4.50e-03 7.17e-04   61.300 57
CPL   1.736    0.850      98.9   -0.0      5.25e-03 1.05e-02   61.260 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.724    0.182    -      -           2.16e-02 2.60e-03   82.580 57
CPL   0.648    0.832      58.8   22.5      8.12e-02 1.04e-01   76.460 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: 0.768000 sec.
T50 in the 50-300 keV band: 0.384000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   10.400   -0.196   10.204
T90     7.568   -0.100    7.468
T50     2.332    0.168    2.500
Peak    1.000   -0.216    0.784

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
  138.5764    -0.1437   0.0159    43.2770  -171.5646         0.7365808     12.205 TRIG_00554996                 
 
Foreground time interval of the image:
 -0.196   9.749 (delta_t =   9.945 [sec])
Background time interval of the image:
-239.152  -0.196 (delta_t = 238.956 [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 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:

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   -0.196 sec. to   10.204 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85624     ( -0.248946   0.264642 )
Norm@50keV  : 4.50367E-03    ( -0.000728237   0.000705369 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.30 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     57 degrees of freedom 
# Null hypothesis probability =   3.244095e-01
 
Photon flux (15-150 keV)    in 10.4 sec: 0.634649 ( -0.0853884  0.0854754 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.30637e-07 ( -6.81977e-08  6.97213e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.196 sec. to   10.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73591     ( -1.1089   0.590227 )
Epeak [keV] : 98.8664      ( -99.2713 -99.2864 )
Norm@50keV  : 5.24559E-03    ( -0.00524052   0.0157674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.26 using 59 PHA bins.
# Reduced chi-squared =          1.094 for     56 degrees of freedom 
# Null hypothesis probability =   2.929955e-01
 
Photon flux (15-150 keV)    in 10.4 sec: 0.631299 ( -0.086014  0.087864 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.25955e-07 ( -7.78877e-08  7.34677e-08 ) ergs/cm2

Band function

Time interval is from   -0.196 sec. to   10.204 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.72778   ( 1.596   6.49788 )
beta        : -2.18062    ( 1.963   11.9361 )
Epeak [keV] : 94.1928      ( -89.2773 -89.2773 )
Norm@50keV   : 5.30736E-03    ( -0.00162826   0.513417 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.26 using 59 PHA bins.
# Reduced chi-squared =          1.114 for     55 degrees of freedom 
# Null hypothesis probability =   2.616161e-01
 
Photon flux (15-150 keV)    in 10.4 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]    : 11.5608  (-1.9426  2.27701)
R^2/D10^2   : 0.170164  (-0.0825102   0.166849)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.12 using 59 PHA bins.
# Reduced chi-squared =          1.336 for     57 degrees of freedom 
# Null hypothesis probability =   4.612622e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.983e-08   1.292e-08
25- 50  1.500e-07   2.626e-08
50-150  1.175e-07   3.619e-08
15-150  3.172e-07   6.874e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 92.0485       (-35.0739      84.2881)
Norm        : 2.84452       (-0.514818     0.685127)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.77 using 59 PHA bins.
# Reduced chi-squared =          1.084 for     57 degrees of freedom 
# Null hypothesis probability =   3.097054e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.724e-08   1.398e-08
25- 50  1.313e-07   2.574e-08
50-150  2.027e-07   1.047e-07
15-150  4.112e-07   1.259e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.64818        (-1.80614      2.69761)
R1^2/D10^2  : 3.55348        (-2.89844      33.8703)
kT2 [keV]   : 17.9477        (-4.58599      11.9234)
R2^2/D10^2  : 2.69828E-02    (-0.0231769   0.0313674)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.61 using 59 PHA bins.
# Reduced chi-squared =          1.120 for     55 degrees of freedom 
# Null hypothesis probability =   2.514934e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.462e-08   4.640e-08
25- 50  1.197e-07   6.066e-08
50-150  1.963e-07   1.172e-07
15-150  4.007e-07   1.904e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.216 sec. to    0.784 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72382     ( -0.178161   0.1856 )
Norm@50keV  : 2.15935E-02    ( -0.00261545   0.00257985 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.58 using 59 PHA bins.
# Reduced chi-squared =          1.449 for     57 degrees of freedom 
# Null hypothesis probability =   1.501478e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.89213 ( -0.317368  0.317546 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.99582e-07 ( -2.49604e-08  2.52784e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.216 sec. to    0.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.648154     ( -0.900532   0.763361 )
Epeak [keV] : 58.8106      ( -11.4416 33.6278 )
Norm@50keV  : 8.11766E-02    ( -0.0487548   0.160043 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.46 using 59 PHA bins.
# Reduced chi-squared =          1.365 for     56 degrees of freedom 
# Null hypothesis probability =   3.599775e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.80206 ( -0.32275  0.32326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.86729e-07 ( -2.5827e-08  2.6685e-08 ) ergs/cm2

Band function

Time interval is from   -0.216 sec. to    0.784 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.89340   ( -6.28953   -4.8934 )
beta        : -1.98206    ( -0.324363   0.24297 )
Epeak [keV] : 27.9043      ( -4.13419 4.00804 )
Norm@50keV   : 1226.47    ( -131.803   3942.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.52 using 59 PHA bins.
# Reduced chi-squared =          1.391 for     55 degrees of freedom 
# Null hypothesis probability =   2.911290e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.82020 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.87229e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.0347  (-1.60556  1.77089)
R^2/D10^2   : 0.544043  (-0.201639   0.329064)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          88.74 using 59 PHA bins.
# Reduced chi-squared =          1.557 for     57 degrees of freedom 
# Null hypothesis probability =   4.508891e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.960e-08   3.755e-09
25- 50  6.771e-08   9.550e-09
50-150  7.285e-08   1.731e-08
15-150  1.602e-07   2.285e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 117.469       (-38.8986      71.8202)
Norm        : 12.4490       (-1.60792     2.00565)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.33 using 59 PHA bins.
# Reduced chi-squared =          1.374 for     57 degrees of freedom 
# Null hypothesis probability =   3.196309e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.245e-08   4.880e-09
25- 50  5.784e-08   9.015e-09
50-150  1.021e-07   4.693e-08
15-150  1.924e-07   5.850e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.73267        (-1.53903      2.13586)
R1^2/D10^2  : 5.64412        (-3.74325      13.9952)
kT2 [keV]   : 18.2970        (-3.30336      5.52276)
R2^2/D10^2  : 0.123926    (-0.0832587   0.141585)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.91 using 59 PHA bins.
# Reduced chi-squared =          1.344 for     55 degrees of freedom 
# Null hypothesis probability =   4.536479e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.128e-08   1.673e-08
25- 50  5.943e-08   2.855e-08
50-150  9.595e-08   5.364e-08
15-150  1.866e-07   8.209e-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: 1.71154     ( -0.243056   0.252432 )
Norm@50keV  : 4.60476E-03    ( -0.000713131   0.000698621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.26 using 59 PHA bins.
# Reduced chi-squared =          1.110 for     57 degrees of freedom 
# Null hypothesis probability =   2.649561e-01
 
Photon flux (15-150 keV)    in 9.945 sec: 0.614050 ( -0.0856822  0.0857642 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.23628e-07 ( -6.77615e-08  6.90847e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27959     ( -1.20431   0.976263 )
Epeak [keV] : 75.4327      (   )
Norm@50keV  : 7.94702E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.71 using 59 PHA bins.
# Reduced chi-squared =          1.120 for     56 degrees of freedom 
# Null hypothesis probability =   2.505418e-01
 
Photon flux (15-150 keV)    in 9.945 sec: 0.603618 ( -0.089243  0.088894 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.06448e-07 ( -7.76555e-08  7.89852e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.81855   ( -4.81855   -4.81855 )
beta        : -1.84767    ( -0.413665   0.288071 )
Epeak [keV] : 24.5863      ( -24.5863 6.3531 )
Norm@50keV   : 485.147    ( -66.6008   3.56131e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.65 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     55 degrees of freedom 
# Null hypothesis probability =   2.503566e-01
 
Photon flux (15-150 keV)    in 9.945 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.07261e-07 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 1.24e-07
S(50-100 keV) = 1.37e-07

T90 vs. Hardness ratio plot

T90                                   = 7.567999958992 sec.
Hardness ratio (energy fluence ratio) = 1.10484

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.04605
Count Ratio (50-100 keV) / (15-25 keV) = 0.834012

Mask shadow pattern

IMX = -9.314096645177184E-01, IMY = 1.381271159145886E-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:
-239.152000 -0.196000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
182.5164  10.3084    2.9  19.6  103.9   1.0040   4.0 ------	UNKNOWN                       
232.7177  45.5931    2.0  49.8    4.9   2.9460   5.7 ------	UNKNOWN                       
193.3907  43.5903    2.9  22.8   -6.8   0.8384   4.0 ------	UNKNOWN                       
203.1304  62.0693    2.1  39.6  -25.8   1.8004   5.6 ------	UNKNOWN

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

Time interval of the image:
-0.196000 9.748600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
165.5934 -18.0130    1.9  46.3  142.6   0.9392   6.3 ------	UNKNOWN                       
165.5766  -1.2106    2.1  29.8  147.9   0.2847   5.5 ------	UNKNOWN                       
138.5764  -0.1437    1.0  43.3 -171.6   0.7366  12.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
74.948630 620.748610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4991 -40.6034    4.5  40.6  168.1   1.7848   2.6    3.2	Vela X-1                      
169.0518 -30.0830    2.9  41.7  123.2   6.0111   3.9 ------	UNKNOWN                       
162.8410  22.8983    2.8  33.0   28.6   2.0571   4.2 ------	UNKNOWN                       
128.2206 -49.2475    2.9  49.9  173.3   4.2283   4.0 ------	UNKNOWN                       
 94.2641 -43.6631    4.7  58.7 -159.3   8.0336   2.5 ------	UNKNOWN                       
105.3587  35.4240    3.8  47.1  -53.0   6.5242   3.1 ------	UNKNOWN                       
 92.8254 -18.4173    3.4  48.5 -130.3   7.2044   3.4 ------	UNKNOWN

Plot creation:
Sat May 30 17:00:21 EDT 2015