batgrbproduct analysis for trigger=1071768

batgrbproduct Analysis for Trigger=1071768

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sat Sep  4 19:24:39 EDT 2021
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1071768/GCN5_download_cron
======================================================================

  Trigger: 01071768      Segment: 000

  BAT Trigger Time: 652370712   [s; MET]
      Trigger Stop: 652370776   [s; MET]
               UTC: 2021-09-03T14:04:44.336980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 299.550433321611   Dec: 34.9432118681029  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.59
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    13.59

  Flight Position:   [ source = BAT ]
    RA: 299.550433321611   Dec: 34.9432118681029  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 299.544034537224   Dec: 34.9681205225444  [deg; J2000]  
        { 19h 58m 10.6s , +34d 58' 05.2" }
         +/- 1.55301514100964 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.609585565359793 [arcmin] (formal 1-sigma fit error)
    SNR: 16.2184838092466
 
  Angular difference between Flight and Ground position is 1.527286 arcmin
 
  Partial Coding Fraction: 0.8828125    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.655521   0.839287   0.424328   0.097616
           0.061947   0.062141   0.054647   0.051060 [error]
 Peak      0.655521   0.839287   0.424328   0.097616
           0.061947   0.062141   0.054647   0.051060 [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 2.11e-07 3.17e-07 3.57e-07 7.62e-07 1.11e-06 1.65e-06   erg/cm2
              Error 2.75e-08 2.84e-08 5.15e-08 2.19e-07 1.20e-07 2.73e-07   erg/cm2
Peak flux Power-law 1.07e-01 8.86e-02 4.99e-02 4.14e-02 2.64e-01 2.87e-01   ph/cm2/s
              Error 1.42e-02 7.95e-03 6.96e-03 1.11e-02 2.37e-02 2.62e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.97e-07 3.53e-07 3.36e-07 1.76e-07 1.00e-06 1.06e-06   erg/cm2
              Error 3.02e-08 3.08e-08 6.58e-08 2.39e-07 1.43e-07 2.83e-07   erg/cm2
Peak flux Cutoff-PL 9.90e-02 9.81e-02 4.81e-02 1.26e-02 2.55e-01 2.58e-01   ph/cm2/s
              Error 1.58e-02 1.12e-02 8.60e-03 -------- 2.47e-02 2.77e-02   ph/cm2/s
 
Fluence        Band 1.89e-07 3.68e-07 3.15e-07 4.53e-07 1.04e-06 1.33e-06   erg/cm2
              Error 3.25e-08 4.05e-08 -------- -------- 1.25e-07 --------   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    1.830    0.161    -      -           1.89e-03 2.01e-04   59.410 57
CPL   0.936    0.804      48.6   22.3      6.31e-03 9.59e-03   54.600 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.830    0.161    -      -           1.89e-03 2.01e-04   59.410 57
CPL   0.936    0.804      48.6   22.3      6.31e-03 9.59e-03   54.600 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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000
  • Click here for the BAT GCN circular template
  • Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

    Image

    Pre-slew 15-350 keV image (Event data; bkg subtracted)

    #   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
      299.5440 +34.9681 0.0119   22.6   14.7       2.1841    16.2  TRIG_01071768       
    ------------------------------------------
     
    Foreground time interval of the image:
      0.000  64.000 (delta_t =  64.000 [sec])
    Background time interval of the image:
    

    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

    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)

    Spectra

    Notes:

    Time averaged spectrum fit using the pre-slew DRM

    Power-law model
    Time interval is from    0.000 sec. to   64.000 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.83024     ( -0.158671   0.16368 )
    Norm@50keV  : 1.89195E-03    ( -0.000202355   0.000199417 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.41 using 59 PHA bins.
    # Reduced chi-squared =          1.042 for     57 degrees of freedom 
    # Null hypothesis probability =   3.880174e-01
     
    Photon flux (15-150 keV)    in 64 sec: 0.263826 ( -0.02371  0.0237153 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.11375e-06 ( -1.19187e-07  1.21427e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.000 sec. to   64.000 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.936295     ( -0.894877   0.712347 )
    Epeak [keV] : 48.5608      ( -9.56016 35.0506 )
    Norm@50keV  : 6.31248E-03    ( -0.0038552   0.0153188 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.60 using 59 PHA bins.
    # Reduced chi-squared =         0.9750 for     56 degrees of freedom 
    # Null hypothesis probability =   5.278958e-01
     
    Photon flux (15-150 keV)    in 64 sec: 0.254729 ( -0.024629  0.024691 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.00204e-06 ( -1.3833e-07  1.46886e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.000 sec. to   64.000 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.63494   ( -4.41215   -4.63494 )
    beta        : -2.23570    ( -0.300742   0.253772 )
    Epeak [keV] : 28.1706      ( -2.85258 2.92706 )
    Norm@50keV   : 75.1453    ( -6.61905   243.412 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          47.73 using 59 PHA bins.
    # Reduced chi-squared =         0.8678 for     55 degrees of freedom 
    # Null hypothesis probability =   7.460044e-01
     
    Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.03568e-06 ( -1.03523e-06  -1.23667e-07 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 10.0727  (-1.01612  1.16576)
    R^2/D10^2   : 0.122142  (-0.0416486   0.0611171)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          69.37 using 59 PHA bins.
    # Reduced chi-squared =          1.217 for     57 degrees of freedom 
    # Null hypothesis probability =   1.260169e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.619e-07   2.531e-08
    25- 50  4.067e-07   4.387e-08
    50-150  2.168e-07   5.283e-08
    15-150  7.854e-07   8.576e-08
    
    Thermal bremsstrahlung (OTTB)
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 83.7639       (-22.3468      38.0849)
    Norm        : 1.22852       (-0.155706     0.187115)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.046e-07   2.950e-08
    25- 50  3.404e-07   3.277e-08
    50-150  4.954e-07   2.091e-07
    15-150  1.040e-06   2.006e-07
    
    Double BB
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 7.30380        (-1.32559      1.37324)
    R1^2/D10^2  : 0.318333        (-0.139306      0.334844)
    kT2 [keV]   : 25.9580        (-8.52416      25.8364)
    R2^2/D10^2  : 2.13019E-03    (-0.00191611   0.00807427)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.977e-07   5.878e-08
    25- 50  3.608e-07   1.152e-07
    50-150  5.009e-07   2.597e-07
    15-150  1.059e-06   4.048e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from    0.000 sec. to   64.000 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.83024     ( -0.158671   0.16368 )
    Norm@50keV  : 1.89195E-03    ( -0.000202355   0.000199417 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.41 using 59 PHA bins.
    # Reduced chi-squared =          1.042 for     57 degrees of freedom 
    # Null hypothesis probability =   3.880174e-01
     
    Photon flux (15-150 keV)    in 64 sec: 0.263826 ( -0.02371  0.0237153 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.11375e-06 ( -1.19187e-07  1.21427e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.000 sec. to   64.000 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.936295     ( -0.894877   0.712347 )
    Epeak [keV] : 48.5608      ( -9.56016 35.0506 )
    Norm@50keV  : 6.31248E-03    ( -0.0038552   0.0153188 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.60 using 59 PHA bins.
    # Reduced chi-squared =         0.9750 for     56 degrees of freedom 
    # Null hypothesis probability =   5.278958e-01
     
    Photon flux (15-150 keV)    in 64 sec: 0.254729 ( -0.024629  0.024691 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.00204e-06 ( -1.3833e-07  1.46886e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.000 sec. to   64.000 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.63494   ( -4.41215   -4.63494 )
    beta        : -2.23570    ( -0.300742   0.253772 )
    Epeak [keV] : 28.1706      ( -2.85258 2.92706 )
    Norm@50keV   : 75.1453    ( -6.61905   243.412 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          47.73 using 59 PHA bins.
    # Reduced chi-squared =         0.8678 for     55 degrees of freedom 
    # Null hypothesis probability =   7.460044e-01
     
    Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.03568e-06 ( -1.03523e-06  -1.23667e-07 ) ergs/cm2
     
    
    Single BB
     XSPEC: quit
     
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 10.0727  (-1.01612  1.16576)
    R^2/D10^2   : 0.122142  (-0.0416486   0.0611171)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.619e-07   2.384e-08
    25- 50  4.067e-07   4.397e-08
    50-150  2.168e-07   5.382e-08
    15-150  7.854e-07   9.120e-08
    
    Thermal bremsstrahlung (OTTB)
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 83.7639       (-22.3468      38.0849)
    Norm        : 1.22852       (-0.155706     0.187115)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.046e-07   2.694e-08
    25- 50  3.404e-07   3.507e-08
    50-150  4.954e-07   2.117e-07
    15-150  1.040e-06   2.054e-07
    
    Double BB
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 7.30380        (-1.32559      1.37323)
    R1^2/D10^2  : 0.318333        (-0.139306      0.334844)
    kT2 [keV]   : 25.9580        (-8.52416      25.8364)
    R2^2/D10^2  : 2.13019E-03    (-0.00191611   0.00807427)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.977e-07   6.966e-08
    25- 50  3.608e-07   1.218e-07
    50-150  5.009e-07   2.570e-07
    15-150  1.059e-06   4.274e-07
    

    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: 1.83024     ( -0.158671   0.16368 )
    Norm@50keV  : 1.89195E-03    ( -0.000202355   0.000199417 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.41 using 59 PHA bins.
    # Reduced chi-squared =          1.042 for     57 degrees of freedom 
    # Null hypothesis probability =   3.880174e-01
     
    Photon flux (15-150 keV)    in 64 sec: 0.263826 ( -0.02371  0.0237153 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.11375e-06 ( -1.19187e-07  1.21427e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.936295     ( -0.894877   0.712347 )
    Epeak [keV] : 48.5608      ( -9.56016 35.0506 )
    Norm@50keV  : 6.31248E-03    ( -0.0038552   0.0153188 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.60 using 59 PHA bins.
    # Reduced chi-squared =         0.9750 for     56 degrees of freedom 
    # Null hypothesis probability =   5.278958e-01
     
    Photon flux (15-150 keV)    in 64 sec: 0.254729 ( -0.024629  0.024691 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.00204e-06 ( -1.3833e-07  1.46886e-07 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.63494   ( -4.41215   -4.63494 )
    beta        : -2.23570    ( -0.300742   0.253772 )
    Epeak [keV] : 28.1706      ( -2.85258 2.92706 )
    Norm@50keV   : 75.1453    ( -6.61905   243.412 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          47.73 using 59 PHA bins.
    # Reduced chi-squared =         0.8678 for     55 degrees of freedom 
    # Null hypothesis probability =   7.460044e-01
     
    Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.03568e-06 ( -1.03523e-06  -1.23667e-07 ) ergs/cm2
     
    

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

    S(25-50 keV)  = 3.17e-07
    S(50-100 keV) = 3.57e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 64 sec.
    Hardness ratio (energy fluence ratio) = 1.12618
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.28034
    Count Ratio (50-100 keV) / (15-25 keV) = 0.647314
    

    Mask shadow pattern

    IMX = 4.019913800573111E-01, IMY = -1.055230638364427E-01
    

    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:
     
    

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

    Time interval of the image:
    0.000000 64.000000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    244.9765 -15.6500  264.7  50.7 -147.0   0.0159   0.0    0.6	Sco X-1                       
    254.3754  35.2336    4.0  32.4  -68.9   0.5813   2.9    7.7	Her X-1                       
    263.0649 -24.6354    5.2  46.4 -172.1  -0.5422  -2.2    7.3	GX 1+4                        
    268.2595  -1.3485    6.5  24.2 -156.6   0.2382   1.8    9.0	SW J1753.5-0127               
    270.2148 -24.9400    4.5  44.1  179.4   0.6090   2.6    9.2	GX 5-1                        
    270.2505 -25.5661    0.0  44.6  179.1  -0.2787  -1.2   11.0	GRS 1758-258                  
    274.0553 -14.1889    4.5  32.7  179.6   0.4085   2.5    9.6	GX 17+2                       
    275.8172 -30.4781    6.1  48.1  170.7   0.6118   1.9    8.7	H1820-303                     
    285.1436 -24.9879    7.0  41.9  159.8   0.4237   1.6    7.1	HT1900.1-2455                 
    288.7083  11.1366    0.0   7.1  124.2  -0.0555  -0.5   12.6	GRS 1915+105                  
    299.5791  35.0386    0.8  22.6   14.6   1.9009  14.1    9.8	Cyg X-1                       
    308.2778  41.0469    5.5  31.7   16.3   0.3091   2.1    9.5	Cyg X-3                       
    326.1968  38.2706    9.5  42.3   31.9   0.3241   1.2    3.3	Cyg X-2                       
    262.9930 -33.8066  332.6  54.7 -177.4   0.0139   0.0    1.7	GX 354-0                      
    307.9771  37.4046    1.5  29.2   21.5   1.1578   7.6 ------	UNKNOWN                       
    283.4412  -1.6142    2.2  18.5  163.8   0.6387   5.2 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    119.600610 363.112100
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.5900  35.1827    5.2  36.5 -113.5   1.3822   2.2   11.6	Her X-1                       
    268.2765  -1.4019    7.1  46.7 -171.7   0.9735   1.6    6.3	SW J1753.5-0127               
    274.1329 -13.9615   12.8  54.5  173.6   1.1406   0.9    8.7	GX 17+2                       
    288.8037  10.7667    5.5  26.1  167.4   0.7628   2.1   10.7	GRS 1915+105                  
    299.5833  35.0176    0.4   0.1  -24.4   8.0769  29.6   11.0	Cyg X-1                       
    308.1456  40.8279   11.7   9.0    9.3   0.3003   1.0    7.6	Cyg X-3                       
    326.1240  38.1191    3.8  21.5   36.5   0.9396   3.0   12.4	Cyg X-2                       
    307.9984  37.4048    0.7   7.2   30.5   5.0156  16.6 ------	UNKNOWN                       
    313.0502  60.6006    2.2  27.1  -22.6   1.6532   5.2 ------	UNKNOWN                       
    257.5895  -6.9674    3.2  57.6 -165.4   5.1736   3.6 ------	UNKNOWN                       
     22.2301  75.6500    4.2  54.5  -19.6   2.7428   2.8 ------	UNKNOWN                       
    262.7263  28.3929    2.9  31.8 -128.7   1.8650   4.0 ------	UNKNOWN                       
    249.6678  37.2836    2.7  39.9 -108.8   4.2360   4.3 ------	UNKNOWN                       
    
    Plot creation:
    Sat Sep  4 19:31:31 EDT 2021