COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                      NUMBER 582

                                  Konkoly Observatory
                                  Budapest
                                  1971 September 21


   PHOTOELECTRIC AND SPECTROGRAPHIC OBSERVATIONS OF THE
        ECLIPSING VARIABLE SZ CAMELOPARDALIS

      The UBV photometry of the eclipsing variable 
SZ Camelopardalis (the northern component of BD+61d676)
was carried out with the 36 inch reflectors at the Dodaira
Station of Tokyo Astronomical Observatory and the Okayama
Astrophysical Observatory on twenty-two clear nights during
the winter of 1970-71. Some coude spectrograms were also
taken with the 74 inch reflector at Okayama.

                    [FIGURE 1]

      BD+61d669 was used as the primary comparison star
in the photoelectric observations, which was the same one
as used in the recent observation by Olsen (1971). The
light of the southern component of BD+61d676 was observed
occasionally for detection of its suspected small light
variation (Guthnick and Prager 1930), but it was confirmed
from our observations that the light of the southern 
component is constant within observational errors of the order
of 0.004m - 0.006m.
      The figure shows our photoelectric light curve in
B, where dots stand for observations with phases between 0
and 1/2 P and small circles for observations with phases
between 1/2 P and P. We obtained the residual O-C=0.1052d
for the primary minimum from Min. - JD 2427533.5191+
+2.6984166d E (Wesselink's ephemeris 1941). Therefore, the
phases in the above figure were corrected by the value
+0.1052d. This O-C value is in good agreement with Olsen's
result from observation of the secondary minimum.


1971 September 13

                    M. KITAMURA and A. YAMASAKI
                   Tokyo Astronomical Observatory,
                         Mitaka, Tokyo



References:

Olsen, Erik Heyn 1971, IAU Bulletin of Commission 27,
     No. 533. [IBVS 533]
Olsen, Erik Heyn 1971, June, private communication,
Guthnik, P, and Prager, R. 1930, Astr. Nachrichten 239, 14. [BIBCODE 1930AN....239...13G ]
Wesselink, A.J. 1941, Ann. Sterrew. Leiden 17, part 3.  [BIBCODE 1941AnLei..17C...1W ]