Аннотация: COMMISSION 27 OF THE I. A. U.
INFORMATION BULLETIN ON VARIABLE STARS
NUMBER 23
Konkoly Observatory
Budapest
18 April 1963
ON THE LIGHT VARIABILITY OF THE OBJECT
IDENTIFIED WITH THE RADIO SOURCE 3 C-273
Examination of 44 plates of the Sternberg Astronomical
Institute at Moscow obtained during 1896-1960 and also of the Wolf-Palisa
and Palomar charts shows that the star-like object identified
with the radio-source 3 C-273^+ is variable within the limits 12m.0-
12m.7 (pg). Most of the plates were measured by means of an iris-
photometer.
Also plates obtained during April-June show the possibility
of smaller light variations with amplitudes of 0m.2-0m.3 and lasting a
few days.