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V/42                Close double stars  (Svechnikov+, 1984)                     
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Catalog of Orbital elements, Masses and Luminosities of close double stars      
     Svechnikov M.A., Bessonova L.A.                                            
    <Bull. Inform. CDS 26, 99 (1984)>                                           
    =1984BICDS..26...99S                SIMBAD/NED Reference                    
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ADC_Keywords: Binaries, orbits  
                                                                                
Description:                                                                    
    This catalogue is a new edition of the catalogue of the photometric         
    and absolute elements of close double systems by Svechnikov (ref 142).      
    After the appearance of this catalogue(1969), the numerous new data 
    concerning both photometric and spectroscopic elements of orbits of 
    the eclipsing binaries were published. The precision of determination 
    of the light curves of eclipsing systems is essentially augmented;
    now, the light curves of eclipsing binaries are obtained mainly by 
    means of multicolour photoelectric observations; for a number 
    of systems,e extra-atmospheric observations from satellites and 
    orbital astronomical observatories are available. More details are
    available in original.doc.    

File Summary:                                                                   
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 FileName   Lrecl    Records    Explanations                                   
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ReadMe         80          .    This file                                      
original.doc   80        414    Original introduction                          
table1.dat     68        246    Summary of close binaries                      
table2.dat    124        483    Photometric elements                           
table3.dat     92        352    Absolute elements                              
notes.dat      80       8468    Notes to tables 2 and 3                        
refs.dat       80       1688    References                                     
acknow.dat     80         27    Acknowledgements                               
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Byte-by-byte Description of file: table1.dat                                    
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   Bytes Format  Units   Label    Explanations                                  
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   2- 20  A19    ---     Name     Designation of the Eclipsing Binary           
  26- 33  A8     ---     HD       Designation in Henry Draper Catalogue         
  34- 40  A7     ---     Type     Eclipsing binary type                         
  47- 55  A9     ---     Group    of classification (see intro.ori)             
  59- 61  I3     ---     Seq      [1/246] Number of the system used in          
                                          table2 and table3                     
  65- 68  A4     ---     Note     e.g. other possible class (see intro.ori)     
--------------------------------------------------------------------------------
                                                                                
Byte-by-byte Description of file: table2.dat                                    
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   Bytes Format  Units   Label      Explanations                                  
--------------------------------------------------------------------------------
   1-  3  I3     ---     Seq        [1/246]+= Number of the system                
   5- 16  A12    ---     Name       Designation of the System                     
  18- 29  F12.9  d       Period     [0.2/40]? Period                              
  30- 31  A2     ---     n_Period   [*?] '*' indicates a variability of Period    
  33- 38  A6     ---     Type       of eclipse (see intro.ori)                    
  41- 46  F6.4   ---     R1         ]0/1[? Mean fractional radius (2)             
  47- 48  A2     ---     n_R1       [*:) ] Notes on R1 (1)                        
  51- 56  F6.4   ---     R2         ]0/1[? Mean fractional radius (2)             
  57- 58  A2     ---     n_R2       [*:) ] Notes on R2 (1)                        
  60- 64  F5.3   ---     b/a        [0/1]? Ratio of minor to major axis           
  65- 66  A2     ---     n_b/a      [*:) ] Notes on B/A (1)                       
  68- 72  F5.2   deg     i          ]0/90]? Orbital inclination angle             
  73- 74  A2     ---     n_i        [*:) ] Notes on i (1)                         
  76- 79  F4.2   ---     LimbCoef   [0/1]? Used limb-darkening coefficient (3)    
  80- 81  A2     ---     n_LimbCoef [*:) ] Notes on LimbCoef (1)                  
  84- 89  F6.4   ---     L1         [0/1]? Fractional light (relative to L1+L2)   
  90- 91  A2     ---     n_L1       [*:) ] Notes on L1 (1)                        
  93- 98  F6.4   ---     L2         [0/1]? Fractional light (relative to L1+L2)   
  99-100  A2     ---     n_L2       [*:) ] Notes on L2 (1)                        
 101-107  F7.3   ---     J1/J2      ]0/]? Ratio of surface brightness (4)         
 108-109  A2     ---     n_J1/J2    [*:) ] Notes on J1/J2 (1)                     
 112-117  A6     0.1nm   Passband   Wavelength domain                             
     119  A1     ---     l_Weight   Limit flag (<) on Weight                      
     120  I1     ---     Weight     [0/9]? on the reliability of photometric      
                                         elements (See Svechnikov, ref 142)      
 122-124  A3     ---     Com        Comments (5)                                  
--------------------------------------------------------------------------------
Note (1): The '*' indicates a note (see file notes)                             
    the colon ':' a questionable value;                                         
      bracket ')' very questionable values (the original left bracket           
                                            has been removed)                   
Note (2): The mean fractional radius (or the small equatorial semi-axes         
    of ellipsoidal stars which are, within the limits of errors of              
    evaluation of photometric elements, practically equal to the mean           
    radii) relative to the orbital major semi-axis                              
Note (3): if the values of the limb-darkening coefficient of the                
    components are not equal, these are given in the notes (file notes)         
Note (4): ratio of surface brightness found from the photometric solution;      
    if the geometric elements of the system obtained from several               
    different (but very similar) photometric solutions are averaged,            
    J1/J2 are calculated with the averaged values of the radii of               
    the components.                                                             
Note (5): Figures '1' and '2' designate the cases, when 2 essentially           
    different variants of the photometric solutions for the same                
    eclipsing system exist, and when we are not able to prefer one              
    of these cases (as a rule, however, only those photometric                  
    solutions are given) which seem to be (in opinion of the authors            
    of this catalogue) the most realistic.                                      
    The data concerning the other photometric solutions (or corresponding       
    bibliographic references) are mentioned in the notes.                       
                                                                                
Byte-by-byte Description of file: table3.dat                                    
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   Bytes  Format  Units   Label    Explanations                                  
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   1-  3   I3     ---     Seq      [1/246]+= Number of the system                
   5- 22   A18    ---     Sp       Spectral classes                              
  24- 28   F5.3   ---     q        ]0/1]? Mass ratio M2/M1 (2)                   
  29- 30   A2     ---     n_q      [*:) ] Note on q (1)                          
  32- 36   F5.2   solMass M1       [0.1/60]? Mass of first component             
      37   A1     ---     q_M1     Uncertainty flag (:) on M1                    
  39- 43   F5.2   solMass M2       [0.1/60]? Mass of second component            
      44   A1     ---     q_M2     Uncertainty flag (:) on M2                    
  46- 50   F5.2   solRad  a        []? Orbital semi-major axis                   
  52- 56   F5.2   solRad  Rad1     []? Radius of first star                      
  57- 58   A2     ---     n_Rad1   [*:) ] Note on Rad1 (1)                       
  60- 65   F6.3   solRad  Rad2     []? Radius of second component                
      66   A1     ---     q_Rad2   Uncertainty flag (:) on Rad2                  
  68- 73   F6.2   mag     Mbol1    []? Absolute Bolometric magnitude             
                                   of component 1 (3)                          
      74   A1     ---     n_Mbol1  [!)] Note on Mbol1 (1)                        
  76- 81   F6.2   mag     Mbol2    []? Absolute Bolometric magnitude             
                                   of component 2 (3)                          
  82- 83   A2     ---     n_Mbol2  [!:*) ] Note on Mbol2 (1)                     
      85   A1     ---     l_W2     Lower limit (<) on W2                         
      86   I1     ---     W2       []? Weight on the accuracy of determination   
                                   of the absolute elements. (4)             
  87- 92   A6     ---     Comment  Comments (5)                                  
--------------------------------------------------------------------------------
Note (1): The '*' indicates a note (see file notes)                             
    the colon ':' a questionable value;                                         
  the bracket ')' very questionable values (the original left bracket           
                                            has been removed)                   
  exclamation '!' is not explained in the "intro.ori" file                      
Note (2): Mass-ratios found spectroscopically, from double-lined                
    spectroscopic orbit, are not accompanied by additional marks.               
    The values of q estimated by means of the so-called 'M-L method',           
    using the mass-function obtained from single-lined spectral orbit,          
    and assuming,that primary component satisfies the mass-luminosity           
    relation for the main-sequence-stars (see Kopal, ref 371;823;               
    Svechnikov, ref 142), are enclosed in brackets. The values of q             
    estimated by some other method, as well as averaged values oF               
    q, are accompanied by the asterisks.                                        
Note (3):                                                                       
    The absolute bolometric magnitudes are computed using the                   
    geometric and spectroscopic characteristics of the components               
    yielded in the previous columns; the stellar effective                      
    temperatures given in Popper's (ref 1615) survey (and based mainly          
    on the scale of effective temperatures and bolometric corrections           
    of Hayes, ref 1623) are used.                                               
Note (4): see Svechnikov, ref 142                                               
Note (5):                                                                       
    Figures '1' and '2' indicate the cases, when 2 different variants           
    of the absolute elements are obtained (corresponding to 'case 1'            
    and 'case 2' of the evaluation of photometric elements or to 2              
    considerably different estimates of q). Also,in this column, the            
    number of the group for US-systems is indicated as well as some             
    other important remarks.                                                    
                                                                                
Acknowlegement:
   This document was prepared by Francois Ochsenbein of the CDS in 
   October, 1994.  It was modified by the inclusion of the ADC keywords
   and of a more extensive description.  
================================================================================
(End)          Nancy G. Roman [ADC]                                   2-Feb-1995

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