Photoelectric Minima of Eclipsing Binaries, 1997


Tristram Brelstaff


  [Originally published in British Astronomical Association 
   Variable Star Section Circular No 96, 14, 1998]


The numbers of photoelectric observations of eclipsing binaries received 
in 1997 are listed in Table 1.

Table 1. Observer Totals
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   Observer           No Obsns   No Timings   Notes
------------------------------------------------------
 J Ells APT (EJ)        1271         5          1
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 Total                  1271         5
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 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
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   AR Aur   2988    2450756.5674  -0.0845    89    EJ        V
   IU Aur   6646    2450487.4652  -0.0063    80    EJ        V
   AR Lac   4595    2450706.3992  -0.0805   103    EJ        V
   AR Lac   4596.5  2450709.3732: -0.0813:   72    EJ        V
   AM Leo  22015    2450546.4120  -0.0068    44    EJ        V
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