batgrbproduct analysis for trigger=582184

batgrbproduct Analysis for Trigger=582184

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 Mar  3 23:29:19 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger582184
======================================================================

  Trigger: 00582184      Segment: 000

  BAT Trigger Time: 409812302.656   [s; MET]
      Trigger Stop: 409812303.168   [s; MET]
               UTC: 2013-12-27T04:44:51.212140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 67.3857857931921   Dec: 28.8645303957545  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.87
     Image Trigger?:     NO
     Rate S/N Ratio:     13.5646599662505  [ if not an image trigger ]
     Image S/N Ratio:    7.87

  Flight Position:   [ source = BAT ]
    RA: 67.3857857931921   Dec: 28.8645303957545  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 67.3659981459722   Dec: 28.8775730325598  [deg; J2000]  
        { 04h 29m 27.8s , +28d 52' 39.3" }
         +/- 1.29866666048165 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.410235495073138 [arcmin] (formal 1-sigma fit error)
    SNR: 20.940103350303
 
  Angular difference between Flight and Ground position is 1.301291 arcmin
 
  Partial Coding Fraction: 0.90625    [ including projection effects ]

  Duration
     T90: 17.9879999756813 +/- 1.55097383208861
        Measured from: -0.340000033378601
                   to: 17.6479999423027     [s; relative to TRIGTIME]
     T50: 10.41999989748 +/- 1.68187513846769
        Measured from: 2.00400000810623
                   to: 12.4239999055862     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.60799998044968     
                   to: 2.60799998044968     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.18800002336502     
                   to: 19.227999985218     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.369747   0.476384   0.405377   0.092055
           0.028105   0.029707   0.026495   0.022306 [error]
 Peak      0.046184   0.049559   0.043969   0.006605
           0.006512   0.006988   0.006193   0.005376 [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 9.58e-08 1.93e-07 3.02e-07 1.04e-06 8.41e-07 1.63e-06   erg/cm2
              Error 1.18e-08 1.39e-08 2.59e-08 2.01e-07 6.34e-08 2.18e-07   erg/cm2
Peak flux Power-law 3.88e-01 3.83e-01 2.64e-01 2.88e-01 1.15e+00 1.32e+00   ph/cm2/s
              Error 8.64e-02 5.38e-02 5.10e-02 1.12e-01 1.58e-01 1.90e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.58e-08 1.93e-07 3.01e-07 9.60e-07 8.39e-07 1.55e-06   erg/cm2
              Error 1.26e-08 1.46e-08 2.67e-08 3.02e-07 6.51e-08 3.53e-07   erg/cm2
Peak flux Cutoff-PL 3.70e-01 3.94e-01 2.70e-01 2.06e-01 1.14e+00 1.24e+00   ph/cm2/s
              Error 1.01e-01 6.37e-02 5.57e-02 1.25e-01 1.62e-01 2.38e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 3.67e-01 3.95e-01 2.72e-01 1.99e-01 1.14e+00 1.23e+00   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    1.353    0.122    -      -           4.22e-03 2.81e-04   61.100 57
CPL   1.340    0.276    9956.1    0.0      4.28e-03 1.36e-03   61.180 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.534    0.246    -      -           9.12e-03 1.35e-03   31.940 57
CPL   1.254    0.754     131.4    0.0      1.27e-02 1.97e-02   31.630 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: 19.712000 sec.
T50 in the 50-300 keV band: 12.352000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   20.416   -1.188   19.228
T90    17.988   -0.340   17.648
T50    10.420    2.004   12.424
Peak    1.000    1.608    2.608

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
   67.3660    28.8776   0.0092    14.0972   -70.6305         0.9028433     20.940 TRIG_00582184                 
 
Foreground time interval of the image:
 -1.188  10.045 (delta_t =  11.233 [sec])
Background time interval of the image:
-239.656  -1.188 (delta_t = 238.468 [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 0.512000

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 0.512000

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 0.512000

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   -1.188 sec. to   19.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35321     ( -0.121854   0.121943 )
Norm@50keV  : 4.21747E-03    ( -0.000281327   0.000280541 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.10 using 59 PHA bins.
# Reduced chi-squared =          1.072 for     57 degrees of freedom 
# Null hypothesis probability =   3.307946e-01
 
Photon flux (15-150 keV)    in 20.42 sec: 0.508420 ( -0.0343784  0.0344393 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.4052e-07 ( -6.31791e-08  6.36169e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.188 sec. to   19.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33979     ( -0.428699   0.123809 )
Epeak [keV] : 9956.07      ( -9999.34 -9999.34 )
Norm@50keV  : 4.27646E-03    ( -0.000282087   0.00244047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.18 using 59 PHA bins.
# Reduced chi-squared =          1.092 for     56 degrees of freedom 
# Null hypothesis probability =   2.953976e-01
 
Photon flux (15-150 keV)    in 20.42 sec: 0.508343 ( -0.035373  0.034297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.39397e-07 ( -6.57218e-08  6.44312e-08 ) ergs/cm2

Band function

Time interval is from   -1.188 sec. to   19.228 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.06575   ( 1.10302   1.10302 )
beta        : -1.35251    ( -0.121958   0.121894 )
Epeak [keV] : 48.3819      ( -36.4647 -36.4647 )
Norm@50keV   : 7.95823E-03    ( -0.00312892   0.603277 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.11 using 59 PHA bins.
# Reduced chi-squared =          1.111 for     55 degrees of freedom 
# Null hypothesis probability =   2.659650e-01
 
Photon flux (15-150 keV)    in 20.42 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]    : 17.3175  (  )
R^2/D10^2   : 3.54282E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         122.53 using 59 PHA bins.
# Reduced chi-squared =         2.1496 for     57 degrees of freedom 
# Null hypothesis probability =   1.077577e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.395e-08   6.034e-09
25- 50  1.974e-07   2.022e-08
50-150  4.250e-07   5.228e-08
15-150  6.663e-07   6.003e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 2.09352       (-0.138916     0.138905)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.16 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     57 degrees of freedom 
# Null hypothesis probability =   1.130976e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.064e-07   7.709e-09
25- 50  2.048e-07   1.947e-08
50-150  4.491e-07   1.358e-07
15-150  7.603e-07   1.507e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.62465        (-1.31707      1.53783)
R1^2/D10^2  : 0.598879        (-0.305519      0.757772)
kT2 [keV]   : 29.0910        (-4.98205      8.31754)
R2^2/D10^2  : 5.36211E-03    (-0.00296061   0.00478167)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.14 using 59 PHA bins.
# Reduced chi-squared =          1.094 for     55 degrees of freedom 
# Null hypothesis probability =   2.949075e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.590e-08   2.516e-08
25- 50  1.896e-07   3.878e-08
50-150  5.573e-07   1.527e-07
15-150  8.428e-07   1.886e-07

Peak spectrum fit

Power-law model

Time interval is from    1.608 sec. to    2.608 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53424     ( -0.241638   0.25083 )
Norm@50keV  : 9.12013E-03    ( -0.00136803   0.00134162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.94 using 59 PHA bins.
# Reduced chi-squared =         0.5603 for     57 degrees of freedom 
# Null hypothesis probability =   9.970679e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.14936 ( -0.157737  0.157792 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.60554e-08 ( -1.41099e-08  1.43886e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.608 sec. to    2.608 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25361     ( -0.992139   0.515238 )
Epeak [keV] : 131.377      ( -131.364 -131.364 )
Norm@50keV  : 1.27222E-02    ( -0.0127228   0.0267481 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.63 using 59 PHA bins.
# Reduced chi-squared =         0.5648 for     56 degrees of freedom 
# Null hypothesis probability =   9.964774e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.13702 ( -0.162193  0.16135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.43513e-08 ( -1.49789e-08  1.52465e-08 ) ergs/cm2

Band function

Time interval is from    1.608 sec. to    2.608 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.20484   ( -0.440078   0.945097 )
beta        : -9.37164    ( 9.37166   19.3717 )
Epeak [keV] : 121.864      ( -61.9256 -122.236 )
Norm@50keV   : 1.34124E-02    ( -0.00547748   0.0153537 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.64 using 59 PHA bins.
# Reduced chi-squared =         0.5753 for     55 degrees of freedom 
# Null hypothesis probability =   9.951881e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.13657 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.40924e-08 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.3493  (-2.68435  3.19697)
R^2/D10^2   : 0.120483  (-0.0573239   0.113091)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.46 using 59 PHA bins.
# Reduced chi-squared =         0.7975 for     57 degrees of freedom 
# Null hypothesis probability =   8.644849e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.919e-09   1.566e-09
25- 50  2.402e-08   5.080e-09
50-150  3.890e-08   1.114e-08
15-150  6.883e-08   1.442e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-94.2539      -199.363)
Norm        : 4.69036       (-0.640935     0.64111)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.71 using 59 PHA bins.
# Reduced chi-squared =         0.5563 for     57 degrees of freedom 
# Null hypothesis probability =   9.973430e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.168e-08   6.520e-09
25- 50  2.247e-08   1.275e-08
50-150  4.927e-08   2.747e-08
15-150  8.342e-08   4.587e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.47649        (-1.56038      2.32182)
R1^2/D10^2  : 6.29315        (-5.11943      44.3181)
kT2 [keV]   : 21.2850        (-4.45662      7.22454)
R2^2/D10^2  : 3.40777E-02    (-0.0219813   0.0446874)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.82 using 59 PHA bins.
# Reduced chi-squared =         0.5241 for     55 degrees of freedom 
# Null hypothesis probability =   9.986180e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.252e-08   6.210e-09
25- 50  1.977e-08   7.662e-09
50-150  5.091e-08   2.664e-08
15-150  8.320e-08   3.794e-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: 1.39229     ( -0.134072   0.134719 )
Norm@50keV  : 5.09041E-03    ( -0.000383301   0.00038215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.56 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     57 degrees of freedom 
# Null hypothesis probability =   4.179422e-01
 
Photon flux (15-150 keV)    in 11.23 sec: 0.618841 ( -0.046573  0.0466451 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.53247e-07 ( -4.68639e-08  4.72545e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25786     ( -0.533428   0.255228 )
Epeak [keV] : 285.468      ( -285.461 -285.461 )
Norm@50keV  : 5.92790E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.34 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     56 degrees of freedom 
# Null hypothesis probability =   3.892575e-01
 
Photon flux (15-150 keV)    in 11.23 sec: 0.614667 ( -0.048947  0.04881 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.47891e-07 ( -5.14514e-08  5.08876e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.20196   ( 1.20196   1.20196 )
beta        : -1.39231    ( -0.1347   0.134096 )
Epeak [keV] : 18.9841      (   )
Norm@50keV   : 9.72676E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.56 using 59 PHA bins.
# Reduced chi-squared =          1.065 for     55 degrees of freedom 
# Null hypothesis probability =   3.461731e-01
 
Photon flux (15-150 keV)    in 11.23 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)  = 1.93e-07
S(50-100 keV) = 3.02e-07

T90 vs. Hardness ratio plot

T90                                   = 17.9879999756813 sec.
Hardness ratio (energy fluence ratio) = 1.56477

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.28841
Count Ratio (50-100 keV) / (15-25 keV) = 1.09636

Mask shadow pattern

IMX = 8.328994264363478E-02, IMY = 2.369173205339976E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-239.656000 -1.188000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6358  22.0139    0.2   3.1   57.8   9.9504  47.4    0.2	Crab                          
 96.7573  17.5866    2.7  15.8   84.1   0.9867   4.3 ------	UNKNOWN                       
 35.9365  28.9454    2.0  40.8  -86.1   5.6271   5.8 ------	UNKNOWN

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

Time interval of the image:
-1.188000 10.044590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7951  21.9921    4.7   3.2   58.9   0.1004   2.4    9.1	Crab                          
 74.2050 -25.4852    2.3  47.1  171.4   0.4513   4.9 ------	UNKNOWN                       
 67.3660  28.8776    0.5  14.1  -70.6   0.9029  20.9 ------	UNKNOWN                       
 55.7342  18.7838    2.9  23.3 -107.8   0.1989   4.0 ------	UNKNOWN                       
 36.8910  71.8233    2.4  56.3  -31.2   1.1115   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
46.044610 838.865900
840.344000 962.379100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6403  22.0145    0.2  16.2  106.1  39.0140  49.9    0.4	Crab                          
 63.9811  37.9038    3.1   9.5  -21.9   2.5092   3.7 ------	UNKNOWN                       
 61.7705   3.6223    3.4  25.8 -172.3   2.4579   3.4 ------	UNKNOWN                       
 57.3295  18.8256    3.6  13.6 -140.6   2.2928   3.2 ------	UNKNOWN                       
 53.1627 -10.3451    2.8  41.6 -163.9   5.1452   4.1 ------	UNKNOWN                       
351.0732  74.5252    3.0  58.6  -23.0  21.7799   3.9 ------	UNKNOWN                       
 29.2680  -2.2677    2.7  48.0 -129.1  17.4311   4.3 ------	UNKNOWN

Plot creation:
Sat May 30 14:54:56 EDT 2015