Central Bureau for Astronomical Telegrams
IAUC 4073: EXO 2030+375; NGC 6212; U Aqr; AG Dra
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 4074
Circular No. 4073
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 617-495-7244/7440/7444
EXO 2030+375
A. Robin, C. Motch, S. A. Ilovaisky, and C. Chevalier,
Observatoire de Basancon, telex: "CCD images taken on May 23.1 UT with
the Haute Provence Observatory 1.93-m reflector reveal four stellar
objects within the 15"-radius x-ray error box (Parmar and White,
private communication), ranging in magnitude from V = 18.5 to 21.5.
Comparison with the Palomar Sky Survey prints shows no significant
changes in brightness for the three objects seen above the Survey's
red plate limit. Our CCD V and R filter images indicate that the
brightest star in the box is also the bluest and thus may be the
optical candidate. The lack of a significant brightness increase
between the 1951 Palomar plates and our observations made only 4
days after discovery of the x-ray transient by EXOSAT suggests this
is probably another Be-type hard transient. The faintness of our
optical candidate is consistent with an early-type star heavily
reddened by an amount compatible with the large x-ray absorption
column."
NGC 6212
J. P. Halpern, Columbia University, and J. A. Biretta, California
Institute of Technology, communicate: "NGC 6212 (IAUC 4060)
is an x-ray-selected, active galaxy with a redshift of 0.030. A
spectrum taken with the Hale 5-m telescope on 1984 Apr. 4 shows a
stellar continuum and weak, broad H-alpha. Narrow emission-line gas
extends to 9" from the nucleus. The maximum luminosity of 7 x 10**35
J/s, as well as the x-ray variability, are typical for x-ray-
selected active galaxies."
U AQUARII
J. E. Bortle, Stormville, NY, reports that this R-CrB-type
variable is undergoing a minimum, as shown by the following visual
magnitude estimates: 1984 Nov. 7.0 UT, 11.8; 27.0, 11.7; Dec. 23.0,
11.8; 1985 May 20.3, [13.3; 30.3, [13.9.
AG DRACONIS
Bortle notes that this star (IAUC 4045) has once again dropped
to minimum, providing his visual magnitude estimates: May 4.1 UT,
9.7; 11.1, 9.7; 16.1, 10.0; 20.1, 10.0.
1985 June 7 (4073) Daniel W. E. Green
Read IAUC 4074
Our Web policy. Index to the CBAT/MPC/ICQ pages.
