Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 3415: ESO 012-G21; Ori A; NOTICE RE Tlgms

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 3414  SEARCH Read IAUC 3416
IAUC number


                                                  Circular No. 3415
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


ESO 012-G21
     R. M. West, European Southern Observatory, commnunicates: "The
galaxy ESO 012-G21 (R.A. = 0h39m16s, Decl. = -79o30'.9, equinox 1950.0) was
found on the ESO (B) Atlas and described in ESO-Uppsala List No. 6
(Holmberg et al. 1978, A. & Ap. Suppl. 34, 285).  Under good seeing
it shows a bright starlike nucleus smaller than 1" surrounded by a
diffuse, elliptical halo.  A spectrum (Las Campanas 2.5-m reflector,
reticon spectrograph) shows typical Seyfert 1 emission lines.  H-alpha
and H-beta are very broad (> 10 nm).  The O III lines are very strong,
but narrower.  Several Fe II lines are present.  The redshift z =
0.03.  Standard UBV photometry by C. Sterken (Bochum 0.6-m reflector)
gave a mean value over three nights of V = 14.5; a variation
is not excluded.  A deep electrograph in B obtained by P. Grosboel
(Danish 1.5-m reflector, 40-mm McMullan camera) shows two diagonally
opposite, faint diffuse spiral features, extending 15" on either
side of the nucleus.  With a Hubble constant of 50 km s**-1 Mpc**-1, Mv
= -22 and the size is 25 kpc.  It is noted that the position is
within 0o.7 of the x-ray source 3U 0055-79 (Giacconi et al. 1974,
Ap. J. Suppl. 27, 37).  The area was confused in the Ariel 5 survey
(Cooke et al. 1978, M.N. 182, 489), and the source is not present
in the 4U catalogue (Forman et al. 1978, Ap. J. Suppl. 38, 357).
ESO 012-G21 is the most conspicuous extragalactic object around."


ORION A
     Z. Abraham, R. Opher and J. C. Raffaelli, CRAAM-Observatorio
Nacional, Rio de Janeiro, report a giant outburst in Ori A observed
with the Itapetinga radio telescope in the 22-GHz water line at a
velocity of ~ 8 km/s with respect to the local standard of rest.
On Oct. 15 the measured intensity was ~ 2 x 10**6 Jy with a line
width of ~ 0.3 km/s; the line was highly linearly polarized.


NOTICE CONCERNING TELEGRAMS
     It is once again an 'open season' for making changes in the
lists of subscribers to the Central Bureau's telegram service.
This applies principally to deletions, address changes and changes
in the manner (TWX/telex vs. public message vs. mailgram vs.
cablegram) telegrams are received.  Those subscribers who wish to make
changes of this type are requested to inform the Central Bureau of
said changes by Nov. 30.


1979 October 25                (3415)              Brian G. Marsden

Read IAUC 3414  SEARCH Read IAUC 3416


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


Valid HTML 4.01!