Photoelectric Minima of Eclipsing Binaries, 1992 - 1993
 

Tristram Brelstaff


  [Originally published in British Astronomical Association 
   Variable Star Section Circular No 81, 4-5, 1994]


The numbers of photoelectric observations received for known and suspected
eclipsing binaries in 1992 and 1993, including measures reserved for separate
discusssion, are given below.

  J Ells APT (EJ)        2839        23
  J E Isles (IS)           11         -
  R D Pickard              20         -
  K West (WEK)             33         1
  Composite timings         -         1

  Total                  2903        25

The code EJ indicates timings made with the Jack Ells Automatic Photoelectric
Telescope operated by M Gough, R D Pickard and J Barry.

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 in the table below are relative to the linear elements given
in the 4th Edition of the GCVS.


Observed Minima:

Star          Epoch     JD Hel (244...)      O-C (d)    No    Observer  Notes

AN And        3970        8877.3955        -0.0095      52       EJ(pe)
              4104.5      9310.4268:       -0.0069:     84       EJ(pe)

AR Aur        2678        9309.4408        -0.0678      78       EJ(pe)

44i Boo      33246.5      8756.4681         0.0365      54       EJ(pe)
             33515.5      8828.5103         0.0362      68       EJ(pe)

RZ Cas        4754        8882.5206         0.0101      43       EJ(pe)
              5125.5      9326.5530         0.0082      86       EJ(pe)

TV Cas        2386        8927.3180:        0.0115:      7       EJ(pe)

YZ Cas        4497        8822.5201        -0.0080      52       EJ(pe)

CW Cep        4966        8926.3323        -0.0265      46       EJ(pe)

GK Cep       10828        8831.4746         0.0603      70       EJ(pe)

NN Cep        2334        9311.492:         0.005:      60       EJ(pe)

V1143 Cyg      928        9303.3787        -0.0129      23       WEK(pe)

V1425 Cyg     6817        8938.4717         0.0055      84       EJ(pe)

V1898 Cyg     1115        9332.2516:       -0.0729:     67       EJ(pe)

AI Dra        4813        9061.5355         0.0138      77       EJ(pe)

AR Lac        3639        8810.4756:       -0.0725:     71       EJ(pe)

SZ Psc        3324        8923.561:        -0.571:      84       2(pe)    *
              3414        9280.4823:       -0.5709:     80       EJ(pe)

HU Tau        3714.5      8913.4650         0.0179      60       EJ(pe)
              3734        8953.5579         0.0129      43       EJ(pe)

W UMa         9893        9066.3938        -0.0204      59       EJ(pe)
              9893.5      9066.5610        -0.0200      62       EJ(pe)

AW UMa        9955        9032.3486:       -0.0069      25       EJ(pe)
             10044        9071.3879        -0.0145      69       EJ(pe)


Notes:

SZ Psc.  The timing on 8923 is a composite timing derived from 49 observations
by EJ on 8923, 33 by EJ on 8919, 1 by IS on 8812 and 1 by IS on 8844.