Central Bureau for Astronomical Telegrams
IAUC 5471: N Cyg 1992; Prob. COMETS; Mkn 421
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 5472
Circular No. 5471
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
NOVA CYGNI 1992
A. Baruffolo, P. Rafanelli, and L. Rosino, Department of
Astronomy, University of Padua, write: "CCD spectra (range 380-750
nm; dispersion 129 A/mm) of Nova Cyg 1992 have been obtained with
the Boller & Chivens spectrograph at the 1.82-m telescope of Asiago
Observatory on Feb. 28 and 29, about 6-7 days after the visual
maximum. The spectra show strong Balmer emission bands accompanied by
two P-Cyg absorptions with mean radial velocities -1280 and -1970
km/s in systems 1 and 2, respectively. Many emission bands are also
present, including Fe II (mult. 27, 28, 37, 38, 42, 55, 74), Ca II
(H and K), Mg II (mult. 4), N II (mult. 3), Na I (589.0-589.6 nm),
and O I with mean P-Cyg absorptions of -1190 km/s (system 1) and
-1830 km/s (system 2). The emission bands are very wide (mean FWHM
about 1550 km/s), so that most of them are badly blended."
PROBABLE COMETS
R. H. McNaught, Anglo-Australian Observatory, reports his
discovery of an apparent comet on a U.K. Schmidt R plate taken by P. R.
Standen. The comet is moderately condensed with a 20" tail in p.a.
80 deg. Following are measurements by McNaught:
1978 UT R.A. (2000) Decl. m1
May 1.50241 13 40 24.75 -31 35 33.7 17.5
1.56491 13 40 20.32 -31 35 17.2
Corrigendum. McNaught also notes that on IAUC 3662, 'Probable
Comet', the date of the observation was incorrect by one year, and
should read 1979 Mar. 5.
MARKARIAN 421
G. M. Hurst, Basingstoke, England, reports that an outburst of
Mrk 421 = QSO 1101+384 (R.A. = 11h01m42s, Decl. = +38 28'.6, equinox
1950.0) has been independently reported by J. Toone, Worsley,
Manchester, and B. Worraker, Didcot, as indicated by the following
visual magnitude estimates: Jan. 29.95 UT, 13.5 (Toone); Feb. 3.24,
13.2 (Toone); 10.11, 13.2 (Worraker); 11.24, 13.2 (Toone); 21.92,
13.0 (Worraker); 23.96, 13.1 (Toone); Mar. 7.95, 12.9 (Toone); 8.87,
12.6 (Toone); 8.92, 12.6 (Worraker); 10.91, 12.6 (Worraker). Previous
outbursts were observed by Toone during 1982 April and 1989 April.
1992 March 10 (5471) Daniel W. E. Green
Read IAUC 5472
Our Web policy. Index to the CBAT/MPC/ICQ pages.
