Central Bureau for Astronomical Telegrams
IAUC 3256: NGC 7213; NONTHERMAL RADIO EMISSION FROM H-alpha-EMISSION OBJECT; NQ Vul
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Read IAUC 3257
Circular No. 3256
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
NGC 7213
M. M. Phillips, Cerro Tololo Interamerican Observatory,
reports that spectrophotometric observations with the SIT-vidicon
spectrometer on the 400-cm telescope show the nucleus of NGC 7213
to have an emission-line spectrum characteristic of a type I
Seyfert galaxy. The data reveal broad, asymmetric Balmer-line
emission, with the full width at zero intensity of H-alpha approximately
equal to 15 000 km/s. Narrow forbidden lines of [O III], [O I],
[N II] and [S II] are moderately strong, as is the underlying
galactic continuum. Direct plates taken with the Curtis Schmidt
telescope indicate that NGC 7213 is most likely of morphological
class S0, with an inner lens structure. Apparently, this is the
first clear example of a Seyfert nucleus in an S0 galaxy. NGC 7213
lies within the HEAO-A2 x-ray error box for H 2208-47.
NONTHERMAL RADIO EMISSION FROM H-alpha-EMISSION OBJECT
E. R. Seaquist, David Dunlap Observatory; P. C. Gregory, University
of British Columbia; and P. C. Crane, National Radio Astronomy
Observatory, report the detection and subsequent observations
of highly variable radio emission from object No. 433 in the list
of H-alpha-emission objects by Stephenson and Sanduleak (1977, Astrophys/
J. Suppl. 33, 459). Observations at several frequencies were made
with the NRAO 91-m telescope, NRAO interferometer and the Algonquin
Radio Observatory 46-m telescope between 1977 Aug. 15 and 1978 June
30. Maximum and minimum 2.7-GHz flux densities were 1.42 +/- 0.10 Jy
(1977 Oct. 4) and 0.52 +/- 0.03 Jy (1978 Feb. 24). Observations at
10.5 GHz on 1978 June 30 show possible variability (~ 20 percent)
during a single day. The source is nonthermal (spectral index =
-0.5) and has angular diameter less than 0".1 at 8.1 GHz. The radio
source position is R.A. = 19h09m21s.33 +/- 0s.03, Decl. = +4o53'53".5 +/- 1".0.
(equinox 1950.0). X-ray, optical and infrared observations are
strongly urged.
NQ VULPECULAE
Further visual magnitude estimates: June 29.19 UT, 12.5 (S.
O'Meara, Harvard College Observatory); July 3.10, 13.1 (D. W. E.
Green, Harvard College Observatory); 8.10, 13.2 (J. Bortle, Brooks
Observatory); 13.22, 12.9 (O'Meara).
1978 August 25 (3256) Brian G. Marsden
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