Photoelectric Minima of Eclipsing Binaries, 1996


Tristram Brelstaff


  [Originally published in British Astronomical Association 
   Variable Star Section Circular No 92, 19, 1997]


The numbers of photoelectric observations of eclipsing binaries received from
various observers in 1996 are listed in Table 1.

Table 1. Observer Totals
------------------------------------------------------
   Observer           No Obsns   No Timings   Notes
------------------------------------------------------
 J Ells APT (EJ)        1012         7          1
 J Saxton (XT)           147         5
 K West (WEK)             43         1
------------------------------------------------------
 Total                  1202        13
------------------------------------------------------
 Notes:
 1. The code EJ indicates timings made with the Jack Ells Automatic
    Photoelectric Telescope operated by M Gough and RD Pickard.

The timings derived from these observations are listed in Table 2. A colon
(':') following a timing indicates that it is uncertain either because the
observations show large scatter or else because the rising or fading limb
was poorly covered. The O-C values are relative to the linear elements
given in the 4th Edition of the GCVS. 

Table 2. Timings of Minimum
---------------------------------------------------------------------
   Star     Epoch     JD Hel        O-C (d)  No  Observer  Filter
---------------------------------------------------------------------
   AR Aur   2912    2450442.3368  -0.0782    86    EJ        V
  44i Boo  38664.5  2450207.5150   0.0568    19    XT        V
  44i Boo  38672    2450209.5238   0.0570    24    XT        V
  44i Boo  38679.5  2450211.5331   0.0577    27    XT        V
  44i Boo  38814    2450247.5541:  0.0575:   11    XT        V
   RZ Cas   5896    2450247.5065   0.0239    38    WEK       V
   VW Cep  21777.5  2450218.4366:  0.0273:   29    EJ        V
   VW Cep  21778    2450218.5724   0.0239    40    EJ        V
 V836 Cyg   8402    2450343.4627   0.0031    73    EJ        V
V1143 Cyg   1050    2450235.5566  -0.0079    20    XT        V
   SW Lac  15793    2450340.4558  -0.0371    36    EJ        V
   AR Lac   4412.5  2450344.4641  -0.0831    94    EJ        V
   CM Lac  14530    2450342.4816  -0.0034    90    EJ        V
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