COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                      Number 1756

                                 Konkoly Observatory
                                 Budapest
                                 1980 March 11


          FURTHER OBSERVATIONS OF SX PHOENICIS


Seventeen times of maximum light of SX Phe were observed during 1979, and were
subsequently analysed to find whether the fundamental and first overtone
periods of the star had changed from the values determined by Coates et al.
(1979).

Based on these previously determined values of the periods, we have tabulated
the residuals (observed-calculated) for the 17 maxima. The rms value of the
residuals is 0.0010 day, which can be accounted for by experimental error. We
thus conclude that there has been no significant change n the accepted periods
of

P_0=0.054964438 day
P_1=0.042772692 day

Table I

Observed times of maximum light of SX Phe for 1979 (fundamental cycles are for
Epoch HJD 2438636.6170)

  Cycle No.   t_max(obs.)    Residual
             HJD+2440000.0  (obs-calc)
1    98128   4030.1687      -0.0009
2    99583   4110.1453      +0.0026
3    99966   4131.1959      +0.0007
4    99981   4132.0155      +0.0001
5   100126   4139.9847      +0.0006
6   100127   4140.0467      +0.0026
7   100129   4140.1482      +0.0002
8   100290   4148.9979      -0.0002
9   100799   4176.9751      +0.0009
10  100800   4177.0326      +0.0003
11  100801   4177.0906      +0.0001
12  100802   4177.1409      -0.0001
13  100928   4184.0682       0.0000
14  100929   4184.1206      +0.0011
15  100930   4184.1790      +0.0002
16  100965   4186.1038      +0,0018
17  100966   4186.1585      -0.0009


D.W. COATES, L. HALPRIN, G.N. HEINTZE, K. THOMPSON
Department of Physics
Monash University,
Clayton Victoria, 3168,
Australia

Reference:

Coates, D.W. et al., 1979, Mon. Not. R. Ast. Soc. 187, 83 - 89 [BIBCODE 1979MNRAS.187...83C ]