COMMISSIONS 27 AND 42 OF THE IAU
               INFORMATION BULLETIN ON VARIABLE STARS
                            Number 4081

                                                    Konkoly Observatory
                                                    Budapest
                                                    5 September 1994

                                                    HU ISSN 0374 - 0676


                       UBV PHOTOMETRY OF FY Per


 FY Per was discovered as a variable star by Morgenroth (1936). Some results of
investigation of this nova-like cataclysmic variable are published by Shugarov (1980).
Recently Sazonov and Shugarov (1993) have discovered that the system's light, changes
with a period of 1h33m and an amplitude of 0.15m in B band.
 FY Per has been observed with the 60 cm telescope and computer controlled photometer 
of the National Astronomical Observatory Rozhen on several occasions. BD+50d1032
has been used as a comparison star. Each integration was 10 sec through the B filter. In
spite of the changes from night to night, the brightness has remained almost constant on
the individual nights, and we have not detected any variations on a Lime scale of ~1-2
hours and amplitude larger than 0.035m.

                                 Table 1

Date               UT           N pts        B            sigma
18 Dec.1993   20h07m- 23h27m     994      12.82m-12.86m   0.012
19 Dec.1993   18 43 - 22 20     1135       12.96-12.99    0.013
21 Dec.1993   22 35 - 22 53       88       13.08-13.10    0.013

Additionally five UBV estimates were obtained:

              Table 2

JD 2440000+   V       B-V        U-B
  9340.49   12.55     0.29      -0.47
  9341.45   12.68     0.30      -0.43
  9343.44   12.74     0.35      -0.41
  9357.42   12.53     0.30      -0.48
  9366.48   12.69     0.35      -0.37

The photometric data here in were reduced using APR software system (Kirov et al.,
1992).


R. ZAMANOV              V. ZAMANOVA
NAO Rozhen,             Planetarium,
POB 136, 4700 Smoljan   POB 45, 4700 Smoljan,
Bulgaria                Bulgaria


References:

Kirov, N. K., Antov, A. P., Genkov, V. V., 1991, Compt. Rend. Acad. Bulg. Sci., 44,
   No. 11, 5
Morgenroth, O., 1936, Astron. Nachr., 261, 261 [BIBCODE 1936AN....261..261M ]
Sazonov, A. V., Shugarov, S, Yu., 1993, IBVS, No. 3744
Shugarov, S. Yu., 1980, Astron. Tsirk, No. 1199, 3 (in Russian) [BIBCODE 1980ATsir1119....3S ]