COMMISSION 27 OF THE I.A.U.
           INFORMATION BULLETIN ON VARIABLE STARS
                        NUMBER 196

                                                Konkoly Observatory
                                                Budapest
                                                18 April 1967


         RECENT OBSERVATIONS OF THE SUPERNOVA IN NGC 1058


The peculiar supernova discovered by P. Wild in 1691 was the object of previous
photometric and spectroscopic work by the writer (Bertola, 1963, 1964, 1965) and
Zwicky (1964), who has called this supernova of type V. Further photometric
observations carried out at Asiago from January, 1966 to February, 1967 are
given here. The supernova which raised the maximum (mpg=12.5) during the outburst
of December, 1961, was visible as the faint star of 18th magnitude since 1937.
In the years 1963-1965 the object was fluctuating around mpg=18.5 and an
outburst of almost one magnitude was observed in September, 1964. During the
period covered by the present observation the supernova has fallen down to
mpg~=19.5. However, the last observation of February 9 shows again a small
outburst. The following Table lists the observations. The asterisk near to
the plate number indicates plates obtained with the 90-65 Schmidt telescope. 
The remaining were obtained with the 122 cm reflector. Emulsions 103-aO
without any filter were employed. The comparison sequence given by the writer
(1963, 1964) has been further extended by assigning magnitude mpg=19.6 to
the star placed between n and o (see Fig. 1. of the 1963 paper).


TABLE

Plate No.          Date         UT        mpg

111+            Jan. 19, 1966   17h33m    18.8:
7621            Jul. 17.        1 49     >18
7647            Aug. 12.        0 10      19.5
7729            Sep. 13.        0 17      19.6
7772                 22.        0 51      19.5
363+            Oct. 14.        1 48      19.5:
370+                 21.       23 09      19.5:
378+            Nov. 7.        20 32      19.6:
7902            Dec. 10.       23 03      19.3
7948            Jan. 15, 1967  23 56      19.2
7966            Feb. 9.        18 09      18.9

Because of the peculiarity of the light-curve of the this exceptional
supernova, characterized by the presence of outburst at minimum, it is
suggested a continuous survey of it.

Osservatorio Astronomico, Padova

                                             F. BERTOLA

References:

Bertola, F., 1963, Asiago Contr. No. 142.
             1964, Ann. d'Ap. 27, 319 [BIBCODE 1964AnAp...27..319B ]
             1965, Asiago Contr. No. 171
Zwicky F.,   1964, Ap.J. 139, 514. [BIBCODE 1964ApJ...139..514Z ]