COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                       Number 907

                                         Konkoly Observatory
                                         Budapest
                                         1974 July 10


      THIRTEEN NEW LOW AMPLITUDE SOUTHERN VARIABLE STARS

   During the course of an investigation of the space distribution
of early-type stars in Monoceros-Canis Major (Claria 1973, Ph.D. 
thesis Univ. Cordoba) a number of stars were found to be low amplitude
variables. UBV observations were made during 1971-72 of 247 stars in
the above mentioned region using the 16-inch and 36-inch telescopes
of the Cerro Tololo Inter-American Observatory, Chile. A large number
of standard stars, taken from the E-regions (Cousins 1963, Roy. Obs.
Bull. No. 69) were observed each night. The accuracy of the V measures
is about +-0.01 mag. and the resulting mean nightly extinction 
coefficients K_v=0.14, K_{bv}=0.09-0.03 (b-v), and K_{ub}=0.30-0.01 (u-b), were
very close to the standard CTIO values. The stars in the following
list were found to have variations greater than 0.08 mag. in V.

HD/CD      maximum         V amplitude      n
        brightness in V

51454       9.33              0.11          3
51477       8.04              0.10          3
51542       9.46              0.09          3
51625       9.83              0.10          5
52721       6.49              0.23          6
53339       9.26              0.13          4
53595       9.83              0.09          4
53754       8.18              0.12          4
53755       6.42              0.11          5
53756       7.26              0.21          4
-9deg1848   9.94              0.18          3
56800       8.23              0.23          3
56873      10.60              0.18          3


Notes

HD 52721 : Visual binary (ADS 5713), Delta{m} = 0.7 mag., sep. = 0".6.
Photometry refers to the combined light of both components.

HD 53755 : Triple system (ADS 5782), Delta{m}(AB) = 3.9 mag., sep.(AB) = 6".5.
Photometry refers to the pair AB only.

                                       JUAN J. CLARIA
                             Instituto Venezolano de Astronomia
                                    Apartado 264 Merida
                                          Venezuela