batgrbproduct Analysis for Trigger=331332

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed May  6 17:20:05 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger331332
======================================================================

  Trigger: 00331332      Segment: 000

  BAT Trigger Time: 245377733.632   [s; MET]
      Trigger Stop: 245377737.728   [s; MET]
               UTC: 2008-10-11T00:28:50.466880    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 220.360725648565   Dec: 33.6074738964866  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.49
     Image Trigger?:     NO
     Rate S/N Ratio:     10.9087121146357  [ if not an image trigger ]
     Image S/N Ratio:    7.49

  Flight Position:   [ source = BAT ]
    RA: 220.360725648565   Dec: 33.6074738964866  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 220.362510504791   Dec: 33.5613723471907  [deg; J2000]  
        { 14h 41m 27.0s , +33d 33' 40.9" }
         +/- 2.12885854413827 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.05054307268918 [arcmin] (formal 1-sigma fit error)
    SNR: 10.3356365748531
 
  Angular difference between Flight and Ground position is 2.767531 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 17.0879999995232 +/- 2.81381732604774
        Measured from: 1.10400000214577
                   to: 18.1920000016689     [s; relative to TRIGTIME]
     T50: 7.93599998950958 +/- 5.78731302841808
        Measured from: 2.64000001549721
                   to: 10.5760000050068     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.08399999141693     
                   to: 2.08399999141693     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.84799998998642     
                   to: 19.0879999995232     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.095880   0.133727   0.091764   0.006508
           0.018658   0.019603   0.017656   0.016202 [error]
 Peak      0.012157   0.016679   0.019483   0.000511
           0.004454   0.004702   0.004189   0.003970 [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 2.76e-08 5.07e-08 7.18e-08 2.14e-07 2.05e-07 3.64e-07   erg/cm2
              Error 7.16e-09 8.27e-09 1.70e-08 1.08e-07 4.06e-08 1.23e-07   erg/cm2
Peak flux Power-law 9.48e-02 1.19e-01 1.09e-01 1.74e-01 3.82e-01 4.96e-01   ph/cm2/s
              Error 4.76e-02 3.67e-02 3.33e-02 1.17e-01 1.02e-01 1.44e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.72e-08 5.09e-08 7.21e-08 2.12e-07 2.04e-07 3.22e-07   erg/cm2
              Error 6.76e-09 9.83e-09 1.73e-08 -------- 4.49e-08 --------   erg/cm2
Peak flux Cutoff-PL 7.90e-02 1.24e-01 1.17e-01 8.69e-02 3.69e-01 4.07e-01   ph/cm2/s
              Error 5.89e-02 4.20e-02 4.06e-02 1.50e-01 1.08e-01 1.79e-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    1.498    0.296    -      -           1.19e-03 2.07e-04   70.450 57
CPL   1.472    1.307     960.1    0.0      1.22e-03 2.80e-03   70.450 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.129    0.474    -      -           3.28e-03 8.60e-04   59.180 57
CPL   0.383    2.282     119.7    0.0      7.22e-03 5.96e-02   58.740 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   18.240    0.848   19.088
T90    17.088    1.104   18.192
T50     7.936    2.640   10.576
Peak    1.000    1.084    2.084
  • 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
      220.3625    33.5614   0.0187     7.7433  -132.8796         0.3969034     10.336 TRIG_00331332                 
     
    Foreground time interval of the image:
      0.848  19.088 (delta_t =  18.240 [sec])
    Background time interval of the image:
    -147.731   0.848 (delta_t = 148.579 [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 4.096000
    

    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 4.096000
    

    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 4.096000
    

    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:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from    0.848 sec. to   19.088 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.49753     ( -0.291676   0.299445 )
    Norm@50keV  : 1.18604E-03    ( -0.000209614   0.00020488 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.45 using 59 PHA bins.
    # Reduced chi-squared =          1.236 for     57 degrees of freedom 
    # Null hypothesis probability =   1.086410e-01
     
    Photon flux (15-150 keV)    in 18.24 sec: 0.147966 ( -0.0238065  0.0238124 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.05308e-07 ( -3.99728e-08  4.11788e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.848 sec. to   19.088 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.47208     ( -1.22559   1.38843 )
    Epeak [keV] : 960.067      (   )
    Norm@50keV  : 1.22454E-03    ( -0.000245931   0.00535839 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.45 using 59 PHA bins.
    # Reduced chi-squared =          1.258 for     56 degrees of freedom 
    # Null hypothesis probability =   9.259863e-02
     
    Photon flux (15-150 keV)    in 18.24 sec: 0.147945 ( -0.023818  0.023776 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.03664e-07 ( -4.72073e-08  4.25193e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.848 sec. to   19.088 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -1.00556   ( 1.00618   5.83153 )
    beta        : -1.67116    ( 1.65753   0.443318 )
    Epeak [keV] : 80.2623      ( -82.7042 -82.7042 )
    Norm@50keV   : 2.30737E-03    ( -0.001229   0.0217591 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.30 using 59 PHA bins.
    # Reduced chi-squared =          1.278 for     55 degrees of freedom 
    # Null hypothesis probability =   8.007738e-02
     
    Photon flux (15-150 keV)    in 18.24 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]    : 12.8547  (-2.40099  3.24449)
    R^2/D10^2   : 2.84503E-02  (-0.0155575   0.0308553)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          78.85 using 59 PHA bins.
    # Reduced chi-squared =          1.383 for     57 degrees of freedom 
    # Null hypothesis probability =   2.923268e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.819e-08   6.229e-09
    25- 50  6.188e-08   1.586e-08
    50-150  6.422e-08   2.575e-08
    15-150  1.443e-07   3.527e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 199.363       (-104.529      -199.363)
    Norm        : 0.602769       (-0.0968782     0.0968807)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.63 using 59 PHA bins.
    # Reduced chi-squared =          1.239 for     57 degrees of freedom 
    # Null hypothesis probability =   1.059886e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.738e-08   1.557e-08
    25- 50  5.266e-08   3.000e-08
    50-150  1.155e-07   6.647e-08
    15-150  1.956e-07   1.105e-07
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 9.38390        (-4.99976      2.97431)
    R1^2/D10^2  : 7.12432E-02        (-0.042161      0.0542711)
    kT2 [keV]   : 66.4144        (-55.0746      -72.7018)
    R2^2/D10^2  : 1.28538E-04    (-8.24291e-05   0.00783952)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.44 using 59 PHA bins.
    # Reduced chi-squared =          1.281 for     55 degrees of freedom 
    # Null hypothesis probability =   7.847198e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.363e-08   1.309e-08
    25- 50  5.837e-08   3.179e-08
    50-150  1.286e-07   6.616e-08
    15-150  2.106e-07   1.033e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from    1.084 sec. to    2.084 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.12930     ( -0.481891   0.465805 )
    Norm@50keV  : 3.28364E-03    ( -0.000860125   0.000860124 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.18 using 59 PHA bins.
    # Reduced chi-squared =          1.038 for     57 degrees of freedom 
    # Null hypothesis probability =   3.960246e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.382034 ( -0.101652  0.102001 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.40178e-08 ( -9.97316e-09  1.02389e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    1.084 sec. to    2.084 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.383342     ( -2.90081   1.66404 )
    Epeak [keV] : 119.690      ( -119.692 -119.692 )
    Norm@50keV  : 7.21840E-03    ( -0.00721852   0.112065 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.74 using 59 PHA bins.
    # Reduced chi-squared =          1.049 for     56 degrees of freedom 
    # Null hypothesis probability =   3.753234e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.368759 ( -0.108136  0.107437 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.25142e-08 ( -1.06142e-08  1.09014e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    1.084 sec. to    2.084 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.480501   ( -0.698621   2.97169 )
    beta        : -10.0000    ( 10   10 )
    Epeak [keV] : 130.918      ( -64.6121 369.812 )
    Norm@50keV   : 6.47497E-03    ( -0.00395715   0.111787 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.75 using 59 PHA bins.
    # Reduced chi-squared =          1.068 for     55 degrees of freedom 
    # Null hypothesis probability =   3.398106e-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]    : 19.9432  (-5.60227  8.91316)
    R^2/D10^2   : 1.83098E-02  (-0.0126227   0.035345)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          60.00 using 59 PHA bins.
    # Reduced chi-squared =          1.053 for     57 degrees of freedom 
    # Null hypothesis probability =   3.676385e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.405e-09   8.340e-10
    25- 50  6.987e-09   3.952e-09
    50-150  2.059e-08   1.191e-08
    15-150  2.899e-08   1.588e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 199.363       (-94.6135      -199.363)
    Norm        : 1.55443       (-0.4184     0.418414)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          61.24 using 59 PHA bins.
    # Reduced chi-squared =          1.074 for     57 degrees of freedom 
    # Null hypothesis probability =   3.264942e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  3.871e-09   2.379e-09
    25- 50  7.446e-09   4.412e-09
    50-150  1.633e-08   9.980e-09
    15-150  2.765e-08   1.653e-08
    
    Double BB
    R1^2/D10^2  : 2108.34        (      )
    kT2 [keV]   : 21.3957        (-5.94722      10.724)
    R2^2/D10^2  : 1.42396E-02    (   )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          57.63 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          57.60 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          57.53 using 59 PHA bins.
    # Reduced chi-squared =          1.048 for     55 degrees of freedom 
    # Reduced chi-squared =          1.047 for     55 degrees of freedom 
    # Reduced chi-squared =          1.046 for     55 degrees of freedom 
    # Null hypothesis probability =   3.783575e-01
    # Null hypothesis probability =   3.792305e-01
    # Null hypothesis probability =   3.815719e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.942e-09   8.650e-10
    25- 50  6.568e-09   3.984e-09
    50-150  2.115e-08   1.298e-08
    15-150  2.966e-08   1.729e-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: 1.49753     ( -0.291676   0.299445 )
    Norm@50keV  : 1.18604E-03    ( -0.000209614   0.00020488 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.45 using 59 PHA bins.
    # Reduced chi-squared =          1.236 for     57 degrees of freedom 
    # Null hypothesis probability =   1.086410e-01
     
    Photon flux (15-150 keV)    in 18.24 sec: 0.147966 ( -0.0238065  0.0238124 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.05308e-07 ( -3.99728e-08  4.11788e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.47208     ( -1.22559   1.38849 )
    Epeak [keV] : 960.067      (   )
    Norm@50keV  : 1.22454E-03    ( -0.000245931   0.00535839 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.45 using 59 PHA bins.
    # Reduced chi-squared =          1.258 for     56 degrees of freedom 
    # Null hypothesis probability =   9.259863e-02
     
    Photon flux (15-150 keV)    in 18.24 sec: 0.147945 ( -0.023818  0.023776 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.03664e-07 ( -4.72073e-08  4.25193e-08 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -1.00556   ( 1.00618   5.83147 )
    beta        : -1.67116    ( 1.65753   0.443318 )
    Epeak [keV] : 80.2623      ( -82.7042 -82.7042 )
    Norm@50keV   : 2.30737E-03    ( -0.001229   0.0222108 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.30 using 59 PHA bins.
    # Reduced chi-squared =          1.278 for     55 degrees of freedom 
    # Null hypothesis probability =   8.007738e-02
     
    Photon flux (15-150 keV)    in 18.24 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)  = 5.07e-08
    S(50-100 keV) = 7.18e-08
    

    T90 vs. Hardness ratio plot

    T90                                   = 17.0879999995232 sec.
    Hardness ratio (energy fluence ratio) = 1.41617
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.39473
    Count Ratio (50-100 keV) / (15-25 keV) = 0.957071
    

    Mask shadow pattern

    IMX = -9.252584379668545E-02, IMY = 9.964078974462079E-02
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 4.096000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 4.096000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 4.096000
    

    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:
    -147.731400 0.848000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.5372  35.4109    7.6  30.8  163.8  -0.2252  -1.5    5.7	Her X-1                       
    267.6986  31.1746    2.1  42.5  162.7   1.2569   5.4 ------	UNKNOWN                       
    260.7128   4.6594    2.8  53.9 -163.6   1.4910   4.1 ------	UNKNOWN                       
    216.1872  10.4138    2.4  29.9 -103.7   0.8248   4.8 ------	UNKNOWN                       
    

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

    Time interval of the image:
    0.848000 19.088000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.3447  35.4701   12.2  30.6  163.8  -0.0467  -1.0    9.4	Her X-1                       
    255.8568  40.7120    2.4  30.2  153.2   0.2500   4.9 ------	UNKNOWN                       
    145.2535  30.1438    2.2  56.9    0.7   1.2571   5.3 ------	UNKNOWN                       
    255.0211  20.1441    2.4  39.1 -173.5   0.2732   4.9 ------	UNKNOWN                       
    220.3625  33.5614    1.1   7.7 -132.9   0.3970  10.3 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    76.268590 962.419800
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    244.9754 -15.6348    0.6  54.6 -152.7  36.0096  18.2    0.4	Sco X-1                       
    254.6867  35.3171    0.0  28.2  133.6  -0.3380  -0.7   11.3	Her X-1                       
    245.4124  62.1043    3.6  32.6   78.4   2.4160   3.2 ------	UNKNOWN                       
    272.3667  10.6461    2.7  52.7  160.0   9.2078   4.2 ------	UNKNOWN                       
    257.2819   1.6739    2.9  47.0 -178.3   3.0647   4.1 ------	UNKNOWN                       
    169.1687  12.9542    3.0  50.7  -44.4   9.6967   3.8 ------	UNKNOWN                       
    
    Plot creation:
    Sun May 31 06:00:11 EDT 2015