COMMISSION 27 OF THE I. A. U
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 252

                                     Konkoly Observatory
                                     Budapest
                                     1968 January 24


                    NOVA DELPHINI (1967)


Since July 12-13, 1967, visual estimates of Nova Delphini have been made by the
writers: 1945 estimates on 97 nights by Robinson in Cambridge, Massachusetts,
and 522 estimates on 59 nights by Ashbrook in Weston, 10 miles away. The light
curve was plotted from the nightly means, provisionally reduced with comparison
star magnitudes from the Arizona Tonantzintla Catalogue (Sky and Tele., 30, 1,
24) or the Bright Star Catalogue (3rd edition). Open circles are visual or
photovisual observations before the commencement of our series; these were
taken from IAUC 2022, 2024, 2025, 2030, and 2036; also, The Astronomer (Ealing,
England), 4, 40, 67.

                        [FIGURE 1]


Our means agree adequately with photoelectric measures on the same nights by
A.J. Stokes and L. Lovell (IBVS 224, 226, and 238), the average deviation
being +0.^m048 (comparison with 15 nights of Stokes' observations) and +0.^m065
(15 nights of Lovell's). A similar comparison between Stokes and Lovell gives
+0.^m065 (17 nights).

These observations are being continued. A definitive reduction of both our
series will be submitted to Peremennie Zvezdi.


L.J. ROBINSON and J. ASHBROOK
"Sky and Telescope"
49 Bay State Rd.
Cambridge, Mass. 02138




      FLARES OBSERVED AT THE CATANIA ASTROPHYSICAL OBSERVATORY


From 22th July 1967 we began photoelectric observations in V light of the flare
stare BD +51d2402, EV Lac and PZ Mon collecting, until today, 131 hours of
observations.

The preliminary results obtained are summarized in the enclosed table.

OBSERVED FLARES

               obs.     Date                                           Comp.
Star           time    (JD hel)   Delta m   rise    total   Remarke    star
                        2439..              time     dur.              BD+
BD +51d2402   76.^h4   696.5845  ^m.07    ^d.0035  ^d.0085   unc.     51d2410
EV Lac         39.2    761.4270    .14                       double   42d4527
                       761.4278    .16      .0004    .0038
                       763.5230    .32      .0004    .0052
                       854.3048    .92      .0009    .0468
PZ Mon         15.5    754.6521    .11      .0005    .0012            1d1495

Catania, January 24, 1968


                            S. CRISTALDI, M. RODONO