batgrbproduct analysis for trigger=311874

batgrbproduct Analysis for Trigger=311874

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 Jan 20 01:57:16 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger311874
======================================================================

  Trigger: 00311874      Segment: 000

  BAT Trigger Time: 232752174.784   [s; MET]
      Trigger Stop: 232752182.976   [s; MET]
               UTC: 2008-05-17T21:22:51.986120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 102.254712634596   Dec: 50.7307421877239  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.81
     Image Trigger?:     NO
     Rate S/N Ratio:     11.8321595661992  [ if not an image trigger ]
     Image S/N Ratio:    9.81

  Flight Position:   [ source = BAT ]
    RA: 102.254712634596   Dec: 50.7307421877239  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 102.278442458184   Dec: 50.7460113143002  [deg; J2000]  
        { 06h 49m 06.8s , +50d 44' 45.6" }
         +/- 2.30377997269376 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.35506563531954 [arcmin] (formal 1-sigma fit error)
    SNR: 9.23305717576612
 
  Angular difference between Flight and Ground position is 1.285006 arcmin
 
  Partial Coding Fraction: 0.5    [ including projection effects ]

  Duration
     T90: 64.5079999864101 +/- 22.3013869451639
        Measured from: 0.543999999761581
                   to: 65.0519999861717     [s; relative to TRIGTIME]
     T50: 25.5960000157356 +/- 18.8237293691574
        Measured from: 4.53999999165535
                   to: 30.136000007391     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.88400000333786     
                   to: 4.88400000333786     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.763999998569489     
                   to: 68.3879999816418     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.244035   0.314499   0.306645   0.076972
           0.055703   0.058259   0.052203   0.047391 [error]
 Peak      0.022649   0.031192   0.016279   0.003404
           0.007024   0.007344   0.006567   0.005729 [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 7.28e-08 1.40e-07 2.08e-07 6.66e-07 5.86e-07 1.09e-06   erg/cm2
              Error 2.24e-08 2.69e-08 5.04e-08 3.48e-07 1.23e-07 3.88e-07   erg/cm2
Peak flux Power-law 2.34e-01 2.00e-01 1.17e-01 1.02e-01 5.96e-01 6.54e-01   ph/cm2/s
              Error 9.33e-02 5.84e-02 5.02e-02 8.35e-02 1.74e-01 1.96e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.64e-08 1.50e-07 2.14e-07 2.74e-07 5.57e-07 7.04e-07   erg/cm2
              Error 2.65e-08 3.45e-08 5.61e-08 5.39e-07 1.37e-07 5.05e-07   erg/cm2
Peak flux Cutoff-PL 1.97e-01 2.72e-01 8.64e-02 3.26e-03 5.59e-01 5.59e-01   ph/cm2/s
              Error 1.07e-01 9.76e-02 8.25e-02 4.63e-02 1.73e-01 1.74e-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    1.428    0.319    -      -           8.83e-04 1.66e-04   54.310 57
CPL   0.817    1.311      94.6  -26.7      1.82e-03 6.35e-03   53.670 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.776    0.483    -      -           4.37e-03 1.48e-03   67.090 57
CPL  -0.819    5.261      41.1   49.1      1.69e-01 1.17e+04   64.000 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: 6.912000 sec.
T50 in the 50-300 keV band: 3.840000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   69.152   -0.764   68.388
T90    64.508    0.544   65.052
T50    25.596    4.540   30.136
Peak    1.000    3.884    4.884

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
  102.2784    50.7460   0.0208    29.1612   -68.1976         0.9886091      9.233 TRIG_00311874                 
 
Foreground time interval of the image:
 -0.764  54.517 (delta_t =  55.281 [sec])
Background time interval of the image:
-239.784  -0.764 (delta_t = 239.020 [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 8.192000

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 8.192000

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 8.192000

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   -0.764 sec. to   68.388 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42775     ( -0.317377   0.319741 )
Norm@50keV  : 8.82617E-04    ( -0.000167269   0.000165719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.31 using 59 PHA bins.
# Reduced chi-squared =         0.9528 for     57 degrees of freedom 
# Null hypothesis probability =   5.765862e-01
 
Photon flux (15-150 keV)    in 69.15 sec: 0.108183 ( -0.0200869  0.0201202 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.86497e-07 ( -1.22133e-07  1.24785e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.764 sec. to   68.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.816952     ( -1.73459   0.88722 )
Epeak [keV] : 94.5658      ( -41.1858 -94.5617 )
Norm@50keV  : 1.82368E-03    ( -0.00112412   0.0115822 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.67 using 59 PHA bins.
# Reduced chi-squared =         0.9584 for     56 degrees of freedom 
# Null hypothesis probability =   5.634678e-01
 
Photon flux (15-150 keV)    in 69.15 sec: 0.105488 ( -0.0211067  0.020927 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.56983e-07 ( -1.35714e-07  1.39247e-07 ) ergs/cm2

Band function

Time interval is from   -0.764 sec. to   68.388 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.694864   ( 0.688822   5.36682 )
beta        : -1.84794    ( 1.86521   0.707765 )
Epeak [keV] : 81.8103      ( -81.6924 541.353 )
Norm@50keV   : 2.16941E-03    ( -0.00131849   40.0206 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.58 using 59 PHA bins.
# Reduced chi-squared =         0.9743 for     55 degrees of freedom 
# Null hypothesis probability =   5.288396e-01
 
Photon flux (15-150 keV)    in 69.15 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]    : 15.2024  (-3.01103  3.98257)
R^2/D10^2   : 1.20325E-02  (-0.00668687   0.0139612)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.77 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     57 degrees of freedom 
# Null hypothesis probability =   4.464865e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.017e-08   1.596e-08
25- 50  1.616e-07   4.754e-08
50-150  2.556e-07   1.005e-07
15-150  4.574e-07   1.222e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-97.2764      -199.363)
Norm        : 0.445361       (-0.0815811     0.0815825)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.23 using 59 PHA bins.
# Reduced chi-squared =         0.9514 for     57 degrees of freedom 
# Null hypothesis probability =   5.796007e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.669e-08   4.522e-08
25- 50  1.475e-07   8.426e-08
50-150  3.235e-07   1.834e-07
15-150  5.477e-07   3.126e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.00571        (-2.8427      -5.00926)
R1^2/D10^2  : 0.278442        (-0.262932      14.7107)
kT2 [keV]   : 19.5453        (-5.35464      -19.5473)
R2^2/D10^2  : 4.42222E-03    (-0.00438288   0.0100607)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.62 using 59 PHA bins.
# Reduced chi-squared =         0.9750 for     55 degrees of freedom 
# Null hypothesis probability =   5.273347e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.977e-08   3.879e-08
25- 50  1.423e-07   7.396e-08
50-150  3.158e-07   1.863e-07
15-150  5.278e-07   2.867e-07

Peak spectrum fit

Power-law model

Time interval is from    3.884 sec. to    4.884 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77574     ( -0.46145   0.50456 )
Norm@50keV  : 4.36814E-03    ( -0.00150359   0.00146456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.09 using 59 PHA bins.
# Reduced chi-squared =          1.177 for     57 degrees of freedom 
# Null hypothesis probability =   1.695447e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.596354 ( -0.173606  0.173608 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.02447e-08 ( -1.36295e-08  1.44853e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    3.884 sec. to    4.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.819383     ( -7.95979   2.56125 )
Epeak [keV] : 41.1191      ( -10.9831 87.1649 )
Norm@50keV  : 0.168939    ( -0.198267   23499.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.00 using 59 PHA bins.
# Reduced chi-squared =          1.143 for     56 degrees of freedom 
# Null hypothesis probability =   2.161718e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.559349 ( -0.170705  0.174316 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.10251e-08 ( -1.11707e-08  1.60239e-08 ) ergs/cm2

Band function

Time interval is from    3.884 sec. to    4.884 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.71654   ( -2.69463   -0.997303 )
beta        : -2.97847    ( 9.37167   19.3708 )
Epeak [keV] : 34.5416      ( -10.8534 80.4113 )
Norm@50keV   : 15.7626    ( -15.7401   45.8011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.06 using 59 PHA bins.
# Reduced chi-squared =          1.147 for     55 degrees of freedom 
# Null hypothesis probability =   2.128442e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.44732e-08 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.1153  (-2.44712  3.49751)
R^2/D10^2   : 0.294918  (-0.200163   0.53412)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.08 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     57 degrees of freedom 
# Null hypothesis probability =   2.420315e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.169e-09   3.508e-09
25- 50  1.559e-08   9.530e-09
50-150  8.409e-09   6.137e-09
15-150  3.016e-08   1.864e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 82.8938       (-46.1074      -82.8819)
Norm        : 2.83878       (-0.92915     1.45432)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.74 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   1.998855e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.382e-09   4.515e-09
25- 50  1.225e-08   7.500e-09
50-150  1.771e-08   1.496e-08
15-150  3.735e-08   2.559e-08

Double BB

------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.63 using 59 PHA bins.
#Fit statistic : Chi-Squared =          63.57 using 59 PHA bins.
#Fit statistic : Chi-Squared =          63.55 using 59 PHA bins.
#Fit statistic : Chi-Squared =          63.54 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     55 degrees of freedom 
# Reduced chi-squared =          1.156 for     55 degrees of freedom 
# Reduced chi-squared =          1.155 for     55 degrees of freedom 
# Reduced chi-squared =          1.155 for     55 degrees of freedom 
# Null hypothesis probability =   1.986629e-01
# Null hypothesis probability =   2.002837e-01
# Null hypothesis probability =   2.006025e-01
# Null hypothesis probability =   2.009078e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.663e-09   5.865e-09
25- 50  1.470e-08   1.510e-08
50-150  1.266e-08   1.705e-08
15-150  3.402e-08   4.643e-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: 1.37295     ( -0.29983   0.299075 )
Norm@50keV  : 1.06882E-03    ( -0.000187054   0.000186085 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.66 using 59 PHA bins.
# Reduced chi-squared =         0.7133 for     57 degrees of freedom 
# Null hypothesis probability =   9.498839e-01
 
Photon flux (15-150 keV)    in 55.28 sec: 0.129386 ( -0.022613  0.0226587 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.7416e-07 ( -1.11216e-07  1.13252e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.863021     ( -1.56373   0.775886 )
Epeak [keV] : 111.114      ( -111.114 -111.114 )
Norm@50keV  : 1.94043E-03    ( -0.00103681   0.00956822 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.14 using 59 PHA bins.
# Reduced chi-squared =         0.7167 for     56 degrees of freedom 
# Null hypothesis probability =   9.457801e-01
 
Photon flux (15-150 keV)    in 55.28 sec: 0.126643 ( -0.023733  0.023551 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.50789e-07 ( -1.25192e-07  1.25324e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.644322   ( 0.630856   0.630856 )
beta        : -1.71093    ( 1.71264   0.60025 )
Epeak [keV] : 84.5541      ( -82.452 -82.452 )
Norm@50keV   : 2.62236E-03    ( -0.00282504   53.8241 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.00 using 59 PHA bins.
# Reduced chi-squared =         0.7273 for     55 degrees of freedom 
# Null hypothesis probability =   9.357949e-01
 
Photon flux (15-150 keV)    in 55.28 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)  = 1.40e-07
S(50-100 keV) = 2.08e-07

T90 vs. Hardness ratio plot

T90                                   = 64.5079999864101 sec.
Hardness ratio (energy fluence ratio) = 1.48571

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.28875
Count Ratio (50-100 keV) / (15-25 keV) = 1.25656

Mask shadow pattern

IMX = 2.072424406940372E-01, IMY = 5.180804300206198E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000

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:
-239.784000 -0.764000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
149.6315  32.6804    2.7  11.1   78.1   0.7454   4.3 ------	UNKNOWN                       
125.6552  15.2709    2.4  22.2 -172.2   0.8125   4.9 ------	UNKNOWN                       
237.5247  77.4892    3.2  58.1   -6.6   3.7424   4.1 ------	UNKNOWN                       
237.7363  77.7405    3.5  58.0   -6.9   3.9758   4.3 ------	UNKNOWN

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

Time interval of the image:
-0.764000 54.516600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
173.6700  18.0428    2.6  37.0   86.6   1.0559   4.4 ------	UNKNOWN                       
134.0828 -19.3465    2.7  54.6  161.8   1.8673   4.3 ------	UNKNOWN                       
189.0158  62.6614    2.4  42.2   11.6   0.6226   4.8 ------	UNKNOWN                       
121.1178 -14.6083    2.2  51.9  178.0   1.0905   5.1 ------	UNKNOWN                       
102.2785  50.7460    1.2  29.2  -68.2   0.9923   9.3 ------	UNKNOWN                       
354.8515  85.8788    2.8  58.1  -24.2   1.8782   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
109.116590 917.316600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6239  22.0145    0.2  32.2 -123.8  33.6420  49.3    0.5	Crab                          
121.6043  -3.7240    4.5  56.9  179.2   7.6114   2.6 ------	UNKNOWN                       
340.2034  66.7391    3.7  54.6   -1.8   4.6975   3.1 ------	UNKNOWN                       
 13.4787  55.6433    2.8  49.7  -25.2   4.2904   4.2 ------	UNKNOWN

Plot creation:
Sun May 31 07:34:32 EDT 2015