Central Bureau for Astronomical Telegrams
IAUC 3471: SN IN Anon GALAXY; NOVALIKE OBJECT IN Vul; KR Aur; PLUTO APPULSE ON 1980 Apr. 6
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Circular No. 3471
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-864-5758
SUPERNOVA IN ANONYMOUS GALAXY
B. Szeidl, Konkoly Observatory, cables that M. Lovas has
discovered a supernova 8" west and 7" south of the nucleus of an anonymous
galaxy located at R.A. = 13h17m.4, Decl. = +34o30' (equinox 1950.0).
On Apr. 18 the object was of photographic magnitude 16.0.
NOVALIKE OBJECT IN VULPECULA
A. V. Holm and C.-C. Wu, Computer Sciences Corporation, write:
"IUE observations of this object (cf. IAUC 3344, etc.) show that
between 1979 Apr. 22.06 and 1980 Jan. 1.29 UT the ultraviolet flux
declined by 1.6 mag at 250 nm and by 1.0 mag at 290 nm. During the
same interval the visual magnitude changed by only 0.2 +/- 0.14.
Interpreting these phenomena as due to an expanding, cooling
photosphere, we would expect the infrared flux to have increased during
the same interval by 0.2 +/- 0.2 mag at 1.25 um and by 0.4 +/- 0.2 mag
at 2.2 um."
KR AURIGAE
S. L. Mufson, Indiana University; and W. Z. Wisniewski and
R. S. McMillan, Lunar and Planetary Laboratory, report the detection
of a point source of x-rays within 30" of the peculiar variable
star KR Aur on HEAO-2 measurements made during 1979 Sept. 20-21.
The soft x-ray flux (0.15-4.5 keV) was (1.9 +/- 0.3) x 10**-15 J
m**-2 s**-1 for a thermal spectrum (temperature 10**7-10**8 K). Another
point x-ray source, 5' to the southwest and 20 percent as bright,
was also detected in the field. On 1979 Sept. 19 infrared fluxes
of KR Aur were measured on the University of Arizona's 1.5-m
telescope to be J = 12.73, H = 12.70 and K = 12.64. On 1979 Mar. 30
the optical fluxes measured on the same telescope were U = 12.11,
B = 13.03, V = 13.00, R = 12.86 and I = 12.80.
PLUTO APPULSE ON 1980 APRIL 6
P. Moore, Selsey, England, writes that observations by J.
Mason, I. Sharp and himself showed that no occultation by Pluto,
1978 P 1 or any other body occurred (cf. IAUC 3464, 3466). Conditions
were excellent. Observations were continuous from 22h40m to
23h20m UT, by which time Pluto had moved well clear of the star;
earlier Pluto had given the star an elongated appearance.
1980 April 28 (3471) Brian G. Marsden
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