COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 615

                                   Konkoly Observatory
                                   Budapest
                                   1972 January 21


      PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR UV Cet


The continuous photoelectric monitoring of the flare star UV Cet was carried
out at the Crimean Astrophysical Observatory in the period of international
patrol. October 11-27, 1971. The observations were made with the 64-cm
meniscus telescope in the photometric system B. The coverage,
characteristics of the observed flares and their light curves are given below.
the explanation of designations and symbols can be found in Ref. 1.

                      Coverage (U.T,)
Date, 1971
Oct.11  19^h19^m-19^h30^m,1931-1937,1939-1955,1956-2015,2020-2034,
        2035-2055,2058-2106,2107-2118,2120-2128,2134-2144,
        2145-2155,2157-2224,2227-2234,2238-2253,2254-2349,
        2354-2357,
    12  1902-1935,1938-1959,2002-2032,2034-2044,2048-2103,
        2106-2116,2118-2125,2127-2142,2144-2153,2155-2212,
        2214-2215,2216-2234,2236-2250,2252-2319,2320-2325,
   13   1845-1849,1850-1921,1923-1932,1933-1955,1958-2010,
        2020-2036
   14   1837-1840,1842-1919,1920-1932,1934-1947,1948-2011,
        2012-2115,2117-2123,2125-2138,2139-2153,2154-2224,
        2227-2315,2316-2337,2338-2400
   15   0000-0001,0003-0017,0019-0029
   16   1851-1910,1912-2103
   20   1846-1850,1853-1947,1948-2020,2051-2107,2108-2126,
        2128-2135,2138-2348.
   21   1838-2131.


                       [FIGURE 1]
                       [FIGURE 2]
                       [FIGURE 3]

Characteristics of the flares observed

Date   U.T.      t_b	   t_a   (I_f-I_0)/I_0  sigma/I_0   P_B
1971  maximum    min.         maximum                    min.
Oct.
  11  20 25.8    0.2    5.4     0.82         +-0.04      0.98
  11  20 37.9    0.2    5.4     0.71           0.06      0.48
  11  20 59.1     -    11.7     3.54           0.08      6.74
  12  20 04.6    0.1    0.15    2.01           0.16      0.30
  12  20 36.1    0.1    0.1     0.72           0.16      0.21
  12  20 49.1    0.1    0.8     0.74           0.09      0.17
  12  20 59.5    3.5    3.0     0.35           0.09      0.72
  13  18 51.7    0.5    3.6     1.36           0.25      1.49
  13  19 14.0    0.1    6.8     2.66           0.17      1.86
  13  19 51.7    0.2    3.8     1.06           0.09      0.77
  14  19 28.3    0.1    3.1     1.81           0.13      0.74
  14  21 13.2    0.4    7.1     4.90           0.09      4.32
  14  21 57.8    0.3    0.3     0.57           0.09      0.17
  15  20 32.5    0.1   17.7     1.62           0.11      2.72
  15  21 13.6    0.3    4.6     1.22           0.09      0.48
  15  22 59.5    0.1    5.3     0.64           0.14      0.19
  16  19 08.0    0.1    5.3     1.58           0.15      0.40
  20  21 42.4    0.2    5.9     2.05           0.11      1.46


P.F. CHUGAINOV
N.I. SHAKHOVSKAYA
Crimean Astrophysical Observatory

Reference:

1 A.D. Andrews, P.F. Chugainov, R.E. Gershberg, V.S. Oskanian, Comm. 27 I.A.U.
   Inf. Bull. Var. Stars No. 326, 1969.



                         [From IBVS 0632]

Errata

Please add to the Tables "Coverage" published in IBVS No. 615 and 616
respectively, the following (read in the Coverage-Table of No. 616 Sept.
instead of Oct.):

Coverage

Sept.16    (17 17-19 14, 19 18-20 57, 21 06-21 12, 21 17-22 04,
            22 07-22 19, 22 24-23 01, 23 05-23 34, 23 37-24 00)
     17    (00 00-00 03, 00 09-00 32, 00 40-01 06, 01 25-01 46)
Oct. 15     19 01-19 08, 19 09-19 36, 19 42-20 40, 20 42-21 41,
            21 42-21 58, 22 00-22 09, 22 11-22 40, 22 42-23 21,
            23 26-23 44, 23 46-24 00
     16     00 00-00 02, 00 03-00 23, 00 24-00 30