batgrbproduct analysis for trigger=712505

batgrbproduct Analysis for Trigger=712505

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): Thu Oct  6 15:00:40 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger712505
======================================================================

  Trigger: 00712505      Segment: 000

  BAT Trigger Time: 495804636.224   [s; MET]
      Trigger Stop: 495804637.248   [s; MET]
               UTC: 2016-09-17T11:30:19.349940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 295.670955502867   Dec: 46.398883954926  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.62
     Image Trigger?:     NO
     Rate S/N Ratio:     29.2574776766556  [ if not an image trigger ]
     Image S/N Ratio:    8.62

  Flight Position:   [ source = BAT ]
    RA: 295.670955502867   Dec: 46.398883954926  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 295.654080243517   Dec: 46.3961822066092  [deg; J2000]  
        { 19h 42m 37.0s , +46d 23' 46.3" }
         +/- 1.44555332745446 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.568071181763014 [arcmin] (formal 1-sigma fit error)
    SNR: 17.9679368193235
 
  Angular difference between Flight and Ground position is 0.716851 arcmin
 
  Partial Coding Fraction: 0.4375    [ including projection effects ]

  Duration
     T90: 14.5199999809265 +/- 1.8157092352809
        Measured from: 0.0920000076293945
                   to: 14.6119999885559     [s; relative to TRIGTIME]
     T50: 7.85199993848801 +/- 1.59884960337923
        Measured from: 1.87600004673004
                   to: 9.72799998521805     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0079999566078186     
                   to: 0.992000043392181     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.299999952316284     
                   to: 15.3080000281334     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.234577   0.472670   0.618579   0.286520
           0.043413   0.046154   0.042504   0.037224 [error]
 Peak      0.056626   0.073315   0.104815   0.043332
           0.011985   0.013315   0.012710   0.011358 [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 7.90e-08 2.11e-07 4.53e-07 2.51e-06 1.22e-06 3.26e-06   erg/cm2
              Error 1.57e-08 2.50e-08 3.83e-08 5.13e-07 1.03e-07 5.21e-07   erg/cm2
Peak flux Power-law 4.31e-01 6.35e-01 6.98e-01 1.44e+00 2.20e+00 3.21e+00   ph/cm2/s
              Error 1.47e-01 1.30e-01 9.70e-02 4.74e-01 3.26e-01 4.86e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.71e-08 2.11e-07 4.57e-07 2.28e-06 1.22e-06 3.03e-06   erg/cm2
              Error 1.73e-08 2.57e-08 4.59e-08 7.37e-07 1.05e-07 7.42e-07   erg/cm2
Peak flux Cutoff-PL 4.30e-01 6.36e-01 6.99e-01 1.43e+00 2.20e+00 3.36e+00   ph/cm2/s
              Error -------- 1.28e-01 -------- -------- 3.26e-01 5.46e-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    0.897    0.154    -      -           6.95e-03 6.33e-04   67.780 57
CPL   0.815    0.418     893.5    0.0      7.51e-03 3.28e-03   67.720 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.862    0.270    -      -           1.92e-02 2.87e-03   45.450 57
CPL   0.849    0.273    9999.2    0.0      1.93e-02 7.15e-03   45.480 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: 12.992000 sec.
T50 in the 50-300 keV band: 7.552000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   15.608   -0.300   15.308
T90    14.520    0.092   14.612
T50     7.852    1.876    9.728
Peak    1.000   -0.008    0.992

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

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
  295.6541    46.3962   0.0107    41.3133   176.8986         1.6350799     17.968 TRIG_00712505                 
 
Foreground time interval of the image:
 -0.300  15.308 (delta_t =  15.608 [sec])
Background time interval of the image:
-125.123  -0.300 (delta_t = 124.823 [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 1.024000

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 1.024000

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 1.024000

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:

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   -0.300 sec. to   15.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.897337     ( -0.157757   0.150847 )
Norm@50keV  : 6.94627E-03    ( -0.000638317   0.000628348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.78 using 59 PHA bins.
# Reduced chi-squared =          1.189 for     57 degrees of freedom 
# Null hypothesis probability =   1.552826e-01
 
Photon flux (15-150 keV)    in 15.61 sec: 0.797253 ( -0.072782  0.073209 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21827e-06 ( -1.03068e-07  1.0334e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.300 sec. to   15.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.814983     ( -0.616014   0.219265 )
Epeak [keV] : 893.458      ( -893.463 -893.463 )
Norm@50keV  : 7.51062E-03    ( -0.000965829   0.00558653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.209 for     56 degrees of freedom 
# Null hypothesis probability =   1.355583e-01
 
Photon flux (15-150 keV)    in 15.61 sec: 0.794513 ( -0.074971  0.071394 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21566e-06 ( -1.0515e-07  1.04639e-07 ) ergs/cm2

Band function

Time interval is from   -0.300 sec. to   15.308 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 26.1014  (-3.03511  3.7454)
R^2/D10^2   : 1.71093E-02  (-0.0057399   0.00808724)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.62 using 59 PHA bins.
# Reduced chi-squared =          1.590 for     57 degrees of freedom 
# Null hypothesis probability =   3.053527e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.088e-08   5.268e-09
25- 50  1.790e-07   2.694e-08
50-150  8.975e-07   1.083e-07
15-150  1.107e-06   1.157e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 3.42352       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         122.86 using 59 PHA bins.
# Reduced chi-squared =         2.1554 for     57 degrees of freedom 
# Null hypothesis probability =   9.808104e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.331e-07   1.480e-08
25- 50  2.560e-07   4.254e-08
50-150  5.614e-07   2.733e-07
15-150  9.505e-07   3.270e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.75161        (-2.90407      4.26818)
R1^2/D10^2  : 0.201796        (-0.124391      0.392034)
kT2 [keV]   : 44.5807        (-12.6078      63.9733)
R2^2/D10^2  : 3.02475E-03    (-0.00240848   0.00484793)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.19 using 59 PHA bins.
# Reduced chi-squared =          1.203 for     55 degrees of freedom 
# Null hypothesis probability =   1.435253e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.164e-08   3.816e-08
25- 50  2.236e-07   1.063e-07
50-150  9.229e-07   4.641e-07
15-150  1.218e-06   5.860e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.008 sec. to    0.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.862329     ( -0.281043   0.259662 )
Norm@50keV  : 1.92064E-02    ( -0.00291788   0.00282662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.45 using 59 PHA bins.
# Reduced chi-squared =         0.7973 for     57 degrees of freedom 
# Null hypothesis probability =   8.646861e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.20443 ( -0.32543  0.32728 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18796e-07 ( -3.10892e-08  3.11522e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.008 sec. to    0.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.848584     ( -0.27734   0.268164 )
Epeak [keV] : 9999.24      ( -9999.36 -9999.36 )
Norm@50keV  : 1.93016E-02    ( -0.00263873   0.01167 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.48 using 59 PHA bins.
# Reduced chi-squared =         0.8121 for     56 degrees of freedom 
# Null hypothesis probability =   8.413939e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.20388 ( -0.32547  0.32719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.19286e-07 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -0.008 sec. to    0.992 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 28.9895  (-6.21063  9.46849)
R^2/D10^2   : 3.43825E-02  (-0.0188052   0.0366629)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.22 using 59 PHA bins.
# Reduced chi-squared =          1.056 for     57 degrees of freedom 
# Null hypothesis probability =   3.601392e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.616e-09   1.545e-09
25- 50  2.807e-08   9.565e-09
50-150  1.687e-07   4.545e-08
15-150  2.014e-07   4.970e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-29.9442      -200)
Norm        : 9.23438       (-1.34814     1.34814)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.43 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     57 degrees of freedom 
# Null hypothesis probability =   1.838781e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.298e-08   1.321e-08
25- 50  4.421e-08   2.481e-08
50-150  9.696e-08   5.465e-08
15-150  1.642e-07   9.335e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.36865        (-3.28825      3.05224)
R1^2/D10^2  : 1.04054        (-0.774206      5.21948)
kT2 [keV]   : 56.1094        (-22.6006      -56.6169)
R2^2/D10^2  : 5.27304E-03    (-0.0040136   0.0146849)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.58 using 59 PHA bins.
# Reduced chi-squared =         0.7923 for     55 degrees of freedom 
# Null hypothesis probability =   8.665714e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.525e-08   8.975e-09
25- 50  3.795e-08   1.960e-08
50-150  1.743e-07   9.575e-08
15-150  2.275e-07   1.182e-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: 0.897337     ( -0.157757   0.150847 )
Norm@50keV  : 6.94627E-03    ( -0.000638317   0.000628348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.78 using 59 PHA bins.
# Reduced chi-squared =          1.189 for     57 degrees of freedom 
# Null hypothesis probability =   1.552826e-01
 
Photon flux (15-150 keV)    in 15.61 sec: 0.797276 ( -0.0727937  0.0731877 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21816e-06 ( -1.03211e-07  1.03343e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.814982     ( -0.616014   0.219265 )
Epeak [keV] : 893.447      ( -893.463 -893.463 )
Norm@50keV  : 7.51063E-03    ( -0.000965829   0.00558653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.209 for     56 degrees of freedom 
# Null hypothesis probability =   1.355583e-01
 
Photon flux (15-150 keV)    in 15.61 sec: 0.794478 ( -0.074951  0.074973 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21623e-06 ( -1.05377e-07  1.04748e-07 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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)  = 2.11e-07
S(50-100 keV) = 4.53e-07

T90 vs. Hardness ratio plot

T90                                   = 14.5199999809265 sec.
Hardness ratio (energy fluence ratio) = 2.14692

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.01499
Count Ratio (50-100 keV) / (15-25 keV) = 2.637

Mask shadow pattern

IMX = -8.776457842954155E-01, IMY = -4.755285116922988E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-125.123400 -0.300000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6141  35.1860    1.7  48.7  164.3   3.4771   6.9    1.5	Cyg X-1                       
308.2060  40.9973    6.5  40.2  160.8   0.4700   1.8    5.1	Cyg X-3                       
326.3021  38.3408    5.8  34.9  139.1   0.5505   2.0    6.2	Cyg X-2                       
 57.1171  23.2901    2.7  52.5   13.4   2.2411   4.3 ------	UNKNOWN                       
352.0345  48.2776    2.4  17.6  110.1   0.7387   4.8 ------	UNKNOWN                       
 80.8861  43.4681    2.4  45.3  -23.0   1.3153   4.9 ------	UNKNOWN                       
264.2397  65.4060    2.3  38.7 -143.3   1.2336   5.0 ------	UNKNOWN

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

Time interval of the image:
-0.300000 15.308000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.7184  35.1480    7.6  48.7  164.1  -0.2614  -1.5    7.1	Cyg X-1                       
308.1426  41.1051   18.6  40.1  161.0   0.0579   0.6    9.3	Cyg X-3                       
325.9244  38.4077   70.2  35.0  139.6   0.0150   0.2   12.7	Cyg X-2                       
295.6541  46.3962    0.6  41.3  176.9   1.6350  18.0 ------	UNKNOWN                       
235.8706  62.2913    2.4  48.3 -131.0   1.1727   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
80.076580 225.276610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3087  35.2359  216.2  32.8 -118.9   0.0149   0.1    9.7	Her X-1                       
268.2811  -1.3953    5.3  53.5 -169.1  -1.2707  -2.2    6.2	SW J1753.5-0127               
288.8537  10.9928    4.9  35.9  167.5   0.6144   2.3    4.3	GRS 1915+105                  
299.5859  35.2050    0.4  11.6  139.9   4.8360  28.3    0.3	Cyg X-1                       
308.0401  41.0804    3.8  10.4   92.4   0.5245   3.0    8.3	Cyg X-3                       
326.0625  38.3733    5.5  23.7   74.8   0.4643   2.1    6.0	Cyg X-2                       
293.9747  -4.9973    2.8  51.4  158.1   3.2054   4.1 ------	UNKNOWN                       
123.4948  76.0245    3.5  57.5  -26.3   3.3769   3.3 ------	UNKNOWN                       
188.1043  73.4125    3.0  50.6  -44.6   3.8762   3.8 ------	UNKNOWN

Plot creation:
Thu Oct  6 15:21:19 EDT 2016