Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 3560: MK 279 AND ESO 141-G55; 1E 0643.0-1648; RX Pup; HONDA'S Var IN Cyg

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 3559 SEARCH Read IAUC 3561
IAUC number 

                                                  Circular No. 3560
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


MK 279 AND ESO 141-G55
     M. J. Geller and J. P. Huchra, Harvard-Smithsonian Center for
Astrophysics, report: "IUE observations show that the Seyfert
galaxies MK 279 and ESO 141-G55 have both increased in brightness by 70
percent in the range 120.0-200.0 nm.  From 1980 June to October
the 140.0-nm fluxes increased from 0.3 x 10**-15 to 0.5 x 10**-15
J m**-2 s**-1 nm**-1 for MK 279 and from 0.8 x 10**-15 to 1.6 x 10**-15
J m**-2 s**-1 nm**-1 for ESO 141-G55.  Over the same period, the galaxy MK
509 was not observed to vary.  Monitoring of these objects at x-ray,
optical and infrared wavelengths is encouraged."


1E 0643.0-1648
     B. Warner, University of Cape Town, telexes: "Photometric
observations of 1E 0643.0-1648 (cf. IAUC 3529) on 1980 Dec. 9-11 show
irregular flickering on timescales of 30 s to 10 min, with
amplitudes of ~ 0.1 magnitude and with occasional trains of larger
flares.  The star was at V ~ 12.5.  On Dec. 15, the star was in a
low state (V ~ 14.5) and again showed a similar eruptive behavior."


RX PUPPIS
     J. P. Swings, Institut d'Astrophyslque, Liege, communicates:
"M. Klutz and I find (cf. A. & AP., in press) that RX Pup seems to
be returning rapidly to the symbiotic nature that it exhibited four
decades ago.  The strong and broad emission lines of He II, O II, N
III and [O III] that appeared between 1979 Mar. and Dec. indicate
an appreciable increase of the degree of excitation.  The case is
strengthened by recent near-infrared spectroscopic observations
carried out by Y. Andrillat, using the European Southern Observatory's
3.6-m telescope (reticon-equipped), in which H II 1013.4 nm is
present in emission, along with possible C III lines on top of a
late-type continuum with TiO absorption bands visible.  Ultraviolet
observations (and those at other wavelengths) are urged in order to
compare the present 'hot' component to the late B continuum
observed with the IUE in the low-resolution mode in 1978 Sept."


HONDA'S VARIABLE IN CYGNUS
     Photographic magnitude estimates by M. Muminovic and M. Stupar,
Sarajevo: 1975 Sept. 4.85 UT, [14; 1980 Dec. 25.75, 11.5.


1981 January 7                 (3560)              Daniel W. E. Green

Read IAUC 3559 SEARCH Read IAUC 3561

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!