COMMISSION 27 OF THE I.A.U.
               INFORMATION BULLETIN ON VARIABLE STARS
                            Number 1497

                                                      Konkoly Observatory
                                                      Budapest
                                                      1978 October 27


                 THE LIGHT CURVE OF 44 i BOOTIS IN 1978

44 i Boo was observed on April 5/6, 1978, with the 75 cm reflector of the
Wilhelm Foerster Observatory (Hopp et al. 1977), and on April 6/7, 8/9, 9/10,
May 4/5 and 9/10, 1978, with the 35 cm Cassegrain telescope of the Hoher List
Observatory (Duerbeck 1978). The first set of observations covers a primary
minimum, and was used to derive a minimum time. The second set, whose accuracy
is not as high as in previous years due to less favorable sky conditions, was
used to derive a mean light curve, with normal points formed from 5 individual
observations. The B and V light curves, relative to HR 5581, are shown in
Figure 1. The times of minimum light are reduced to J.D. 2443607.
   The O-C values of the observed minimum times are, according to the
elements of Duerbeck (1975).:


J.D.hel.       O-C       m.e.      Observer
(2443000+ )

604.588       -0.003   +-0.003     Hopp et al.
607.5379      +0.0009  +-0.0013    Duerbeck & Karimie (primary min.)
607.8107      +0.0059  +-0.0026        "         "    (secondary min.)

   The period has obviously remained constant; the significant deviation of the
secondary minimum is possibly caused by a disturbance in the light curve.
   In both colours, the primary minimum is 0m.016 deeper than the secondary
minimum, and the maximum at phase 0.25 is 0m.011 higher than that at phase
0.75. Considering the inequality of the maxima in previous years (Duerbeck
1978), the maximum at phase 0.25 has continuously increased in height, and it
is now the higher one.

                         [FIGURE 1]

 Fig. 1. Light curves of i Boo relative to HR 5581- upper: B, lower: V.


                 H.W. DUERBECK and M.T. KARIMIE *

                   Observatorium Hoher List
                der Universitats-Sternwarte Bonn
                    5568 Daun/Eifel, F.R.G.


               U. HOPP, M. KIEHL, and S. WITZIGMANN

                   Wilhelm-Foerster-Sternwarte
                     1000 Berlin 41, F.R.G.


* Stipendiat der Humboldt Stiftung,
  Bonn-Bad Godesberg, F.R.G.



References:

Duerbeck, H.W. 1975, Inf. Bull. Var. Stars 1023
Duerbeck, H.W. 1978, Astr. & Astrophys. Suppl. Ser. 32, 361 [BIBCODE 1978A&AS...32..361D ]
Hopp, U., Witzigmann, S., Kiehl, M. 1977, Inf. Bull. Var. Stars 1353