batgrbproduct analysis for trigger=1159439

batgrbproduct Analysis for Trigger=1159439

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
4) This page will be updated for up to 15 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sun Mar 12 20:48:14 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1159439/GCN5_download_cron
======================================================================

  Trigger: 01159439      Segment: 000

  BAT Trigger Time: 700258120   [s; MET]
      Trigger Stop: 700258184   [s; MET]
               UTC: 2023-03-11T20:08:09.094080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 83.5142811851246   Dec: 22.2365583752096  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.53
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.53

  Flight Position:   [ source = BAT ]
    RA: 83.5142811851246   Dec: 22.2365583752096  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 83.5222910335028   Dec: 22.2278593531237  [deg; J2000]  
        { 05h 34m 05.3s , +22d 13' 40.3" }
         +/- 1.62058716164171 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.57767399481138 [arcmin] (formal 1-sigma fit error)
    SNR: 15.2611193380238
 
  Angular difference between Flight and Ground position is 0.685803 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 206.06400001049 +/- 53.3178182863372
        Measured from: -23.7279999256134
                   to: 182.336000084877     [s; relative to TRIGTIME]
     T50: 103.883999943733 +/- 34.7310845264363
        Measured from: 2.94400012493134
                   to: 106.828000068665     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 43.3079999685287     
                   to: 44.3079999685287     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -30.4400000572205     
                   to: 235.06400001049     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.812391   3.209480   1.724603   0.189058
           0.146047   0.147228   0.123992   0.104569 [error]
 Peak      0.035011   0.039861   0.024709   0.003729
           0.011052   0.010556   0.009599   0.007680 [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 1.19e-06 1.43e-06 1.25e-06 1.88e-06 4.54e-06 5.76e-06   erg/cm2
              Error 1.02e-07 7.69e-08 1.23e-07 3.78e-07 2.72e-07 4.97e-07   erg/cm2
Peak flux Power-law 3.89e-01 2.50e-01 1.04e-01 5.92e-02 7.73e-01 8.02e-01   ph/cm2/s
              Error 1.62e-01 8.65e-02 6.37e-02 7.59e-02 2.53e-01 2.66e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.18e-06 1.44e-06 1.25e-06 1.74e-06 4.52e-06 5.61e-06   erg/cm2
              Error 1.13e-07 8.77e-08 1.25e-07 6.91e-07 3.05e-07 7.92e-07   erg/cm2
Peak flux Cutoff-PL 3.71e-01 2.84e-01 9.35e-02 1.32e-02 7.59e-01 7.62e-01   ph/cm2/s
              Error 1.74e-01 1.21e-01 8.55e-02 7.18e-02 2.53e-01 1.92e-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    2.194    0.116    -      -           2.07e-03 1.43e-04   52.730 57
CPL   2.204    0.000     911.6   19.4      2.05e-03 1.11e-03   52.750 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.263    0.667    -      -           4.51e-03 2.15e-03   81.680 57
CPL   1.201    4.950      27.7    0.0      2.10e-02 0.00e+00   81.230 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  265.504  -30.440  235.064
T90   206.064  -23.728  182.336
T50   103.884    2.944  106.828
Peak    1.000   43.308   44.308

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
   83.5223 +22.2279 0.0126   29.1  102.0       3.6957    15.3  TRIG_01159439       
------------------------------------------
 
Foreground time interval of the image:
-16.599   8.310 (delta_t =  24.909 [sec])
  9.000  56.340 (delta_t =  47.340 [sec])
 57.000  72.230 (delta_t =  15.230 [sec])
Background time interval of the image:

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) The mask-weighted light curves are using the flight position.
3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
4) 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.
5) 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.
6) 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

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:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of 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.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Multiple GTIs in the spectrum
tstart tstop
-30.440000 8.310000
9.000000 56.340000
57.000000 72.230000
73.000000 134.140000
151.000000 221.255400
233.000000 233.090000
234.000000 234.030000
235.000000 235.064000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.19361     ( -0.114112   0.117739 )
Norm@50keV  : 2.07357E-03    ( -0.000143773   0.000141553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.73 using 59 PHA bins.
# Reduced chi-squared =         0.9252 for     57 degrees of freedom 
# Null hypothesis probability =   6.357474e-01
 
Photon flux (15-150 keV)    in 232.9 sec: 0.342137 ( -0.0192383  0.0193267 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.53654e-06 ( -2.71254e-07  2.73588e-07 ) ergs/cm2

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
-30.440000 8.310000
9.000000 56.340000
57.000000 72.230000
73.000000 134.140000
151.000000 221.255400
233.000000 233.090000
234.000000 234.030000
235.000000 235.064000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.20411     ( -1.99117   -1.99117 )
Epeak [keV] : 911.587      ( -0.807226 37.9626 )
Norm@50keV  : 2.04798E-03    ( -0.000550132   0.00167425 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.75 using 59 PHA bins.
# Reduced chi-squared =         0.9419 for     56 degrees of freedom 
# Null hypothesis probability =   5.987051e-01
 
Photon flux (15-150 keV)    in 232.9 sec: 0.341836 ( -0.022035  0.019514 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.51852e-06 ( -3.21239e-07  2.88027e-07 ) ergs/cm2

Band function

Multiple GTIs in the spectrum
tstart tstop
-30.440000 8.310000
9.000000 56.340000
57.000000 72.230000
73.000000 134.140000
151.000000 221.255400
233.000000 233.090000
234.000000 234.030000
235.000000 235.064000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -3.93797   ( 3.93797   3.93797 )
beta        : -2.19361    ( -0.117733   0.114136 )
Epeak [keV] : 4.22493      ( -4.22493 -4.22493 )
Norm@50keV   : 0.281827    ( -0.0195402   0.0192396 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.73 using 59 PHA bins.
# Reduced chi-squared =         0.9588 for     55 degrees of freedom 
# Null hypothesis probability =   5.617015e-01
 
Photon flux (15-150 keV)    in 232.9 sec: 0.340156 (    ) 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]    : 10.0067  (  )
R^2/D10^2   : 0.142874  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         149.43 using 59 PHA bins.
# Reduced chi-squared =         2.6216 for     57 degrees of freedom 
# Null hypothesis probability =   3.205811e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.788e-07   6.673e-08
25- 50  1.689e-06   1.041e-07
50-150  8.833e-07   1.336e-07
15-150  3.251e-06   2.061e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 55.8418       (-8.62913      10.8877)
Norm        : 1.78159       (-0.18476     0.192575)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.030e-06   8.932e-08
25- 50  1.532e-06   9.141e-08
50-150  1.640e-06   2.027e-07
15-150  4.202e-06   2.725e-07

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.31720        (-0.620683      0.727076)
R1^2/D10^2  : 3.34509        (-1.6874      3.77484)
kT2 [keV]   : 16.4248        (-1.99492      2.63035)
R2^2/D10^2  : 1.63230E-02    (-0.00742999   0.0115569)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.224e-06   2.725e-07
25- 50  1.359e-06   2.019e-07
50-150  1.735e-06   2.986e-07
15-150  4.318e-06   7.569e-07

Peak spectrum fit

Power-law model

Time interval is from   43.308 sec. to   44.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.26261     ( -0.587521   0.746319 )
Norm@50keV  : 4.51382E-03    ( -0.00219176   0.00210101 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.68 using 59 PHA bins.
# Reduced chi-squared =          1.433 for     57 degrees of freedom 
# Null hypothesis probability =   1.772668e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.772755 ( -0.253479  0.253501 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.28516e-08 ( -1.67541e-08  1.80165e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   43.308 sec. to   44.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20082     ( -9.00624   0.893724 )
Epeak [keV] : 27.7291      (   )
Norm@50keV  : 2.09748E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.23 using 59 PHA bins.
# Reduced chi-squared =          1.450 for     56 degrees of freedom 
# Null hypothesis probability =   1.543705e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.759428 ( -0.251227  0.254582 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90914e-08 ( -1.61254e-08  2.02177e-08 ) ergs/cm2

Band function

Time interval is from   43.308 sec. to   44.308 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.84473   ( -7.23965   -0.963708 )
beta        : -2.90087    ( 2.77467   0.999548 )
Epeak [keV] : 26.7357      ( -26.5762 60.6457 )
Norm@50keV   : 18.6629    ( -18.6712   334.948 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.78 using 59 PHA bins.
# Reduced chi-squared =          1.469 for     55 degrees of freedom 
# Null hypothesis probability =   1.336743e-02
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94846e-08 ( 0  0 ) ergs/cm2

Single BB

 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 7.65148  (-2.41023  3.91859)
R^2/D10^2   : 1.04647  (-1.04487   3.85757)
(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  1.070e-08   6.715e-09
25- 50  1.730e-08   1.100e-08
50-150  3.915e-09   3.303e-09
15-150  3.191e-08   1.981e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 41.6710       (-22.9242      81.502)
Norm        : 4.95525       (-2.29592     4.97466)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.153e-08   6.910e-09
25- 50  1.544e-08   9.735e-09
50-150  1.248e-08   9.845e-09
15-150  3.945e-08   2.520e-08

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.67816        (-5.34687      4.67785)
R1^2/D10^2  : 2.65975        (-2.74613      -2.74613)
kT2 [keV]   : 17.0172        (-16.9302      -16.9302)
R2^2/D10^2  : 2.28371E-02    (-0.0242858   0.152662)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.189e-08   8.170e-09
25- 50  1.526e-08   9.030e-09
50-150  1.216e-08   7.425e-09
15-150  3.931e-08   2.393e-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: 2.11469     ( -0.16962   0.178688 )
Norm@50keV  : 2.17358E-03    ( -0.000255163   0.000249589 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.98 using 59 PHA bins.
# Reduced chi-squared =         0.6663 for     57 degrees of freedom 
# Null hypothesis probability =   9.753341e-01
 
Photon flux (15-150 keV)    in 87.48 sec: 0.344461 ( -0.0304448  0.0304586 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.76925e-06 ( -1.84451e-07  1.87637e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73263     ( -0.714751   0.413923 )
Epeak [keV] : 29.4720      (   )
Norm@50keV  : 3.60128E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.88 using 59 PHA bins.
# Reduced chi-squared =         0.6586 for     56 degrees of freedom 
# Null hypothesis probability =   9.773068e-01
 
Photon flux (15-150 keV)    in 87.48 sec: 0.339113 ( -0.03158  0.031577 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.7077e-06 ( -2.04642e-07  2.11378e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.73213   ( 1.78409   0.795623 )
beta        : -10.0000    ( 10   20 )
Epeak [keV] : 29.4795      ( -17.4883 24.9488 )
Norm@50keV   : 3.60298E-03    ( -0.00136953   0.00558876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.88 using 59 PHA bins.
# Reduced chi-squared =         0.6706 for     55 degrees of freedom 
# Null hypothesis probability =   9.712289e-01
 
Photon flux (15-150 keV)    in 87.48 sec: 0.341721 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.7152e-06 ( -1.71459e-06  -2.15096e-07 ) ergs/cm2

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

S(25-50 keV)  = 1.43e-06
S(50-100 keV) = 1.25e-06

T90 vs. Hardness ratio plot

T90                                   = 206.06400001049 sec.
Hardness ratio (energy fluence ratio) = 0.874126

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.841855
Count Ratio (50-100 keV) / (15-25 keV) = 0.452368

Mask shadow pattern

IMX = -1.158670702169611E-01, IMY = -5.435740395731843E-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:
-119.000000 -88.220000
-86.000000 -56.564000
-46.000000 3.075400
9.000000 56.340000
61.000000 64.190000
73.000000 128.768000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6413  22.0616  201.3  18.1  164.3  -0.0149  -0.1    2.9	Crab                          
110.2764  32.3035    1.7  29.1  102.0   3.0805   6.8 ------	UNKNOWN                       
 98.5052  56.0597    2.0  23.3   44.3   1.7806   5.9 ------	UNKNOWN                       
 34.0060  69.0177    2.6  37.4  -12.5   1.5774   4.5 ------	UNKNOWN

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

Time interval of the image:
-16.599410 8.310000
9.000000 56.340000
57.000000 72.230000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5155  22.1479    0.9  29.1  102.2   3.1889  13.2   10.3	Crab                          
 69.8126  44.6279    1.0  23.3   44.4   1.9354  11.5 ------	UNKNOWN                       
 68.6890   3.1569    2.2  28.2  153.2   1.0083   5.2 ------	UNKNOWN                       
 38.8412   1.6263    2.1  27.7 -140.2   1.0066   5.6 ------	UNKNOWN                       
 37.7777 -13.9710    3.1  42.6 -148.8   1.1910   3.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
151.000000 221.255400
233.000000 233.090000
234.000000 234.030000
235.000000 243.120000
248.000000 259.260000
263.000000 275.420000
280.000000 292.300000
298.000000 303.002400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5017  22.1587    0.9   0.1 -166.7   4.1810  12.7   11.3	Crab                          
100.0726  75.3007    3.8  53.8    8.0   2.5944   3.1 ------	UNKNOWN                       
 87.0788  67.7307    2.2  45.5    4.7   2.9557   5.4 ------	UNKNOWN                       
 69.9505  44.6587    1.8  25.0  -20.4   2.3242   6.2 ------	UNKNOWN                       
 38.1708  54.6711    2.4  46.8  -31.6   3.9541   4.9 ------	UNKNOWN                       
 30.4321  45.6058    2.4  48.7  -45.3   6.4987   4.9 ------	UNKNOWN

Plot creation:
Sun Mar 12 20:51:48 EDT 2023