Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 6214: N Cas 1995

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 6213 SEARCH Read IAUC 6215

View IAUC 6214 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 6214
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)


NOVA CASSIOPEIAE 1995
     O. Ohshima, K. Ayani, M. Shimizu, and T. Yamamoto, Bisei
Astronomical Observatory (BAO), Okayama, report that CCD
spectrograms (range 390-700 nm, resolution 1.0 nm) of N Cas 1995
(IAUC 6213) were obtained on Aug. 26.736 and 27.5-27.7 UT with the
BAO 1.0-m telescope.  The spectra show very strong H-alpha emission
(with weak or absent P-Cyg profile) and weak Fe II emission, and
the strong continuum has absorption lines of Na I (D1 + D2) and Ca
II (H + K).
     T. Iijima and L. Rosino, Asiago Astrophysical Observatory,
write:  "Optical spectra (range 410-510 nm, resolution 0.2 nm/pixel
at 450 nm) of N Cas 1995 were obtained on Aug. 26.96 UT with the
Asiago 1.2-m telescope (+ prismatic spectrograph).  The spectra
show a blue continuum and prominent, narrow emission lines of H I
and Fe II multiplets 27, 37, 38, and 42. The FWHMs of H I lines are
about 300 km/s.  H I and some Fe II lines have P-Cyg-type
absorptions whose blueshifts are in the range from -280 to -400
km/s."
     M. Della Valle, Dipartimento di Astronomia dell'Universita di
Padova; and W. Marchiotto and G. Lercher, Institut fur Astronomie,
Universitat Innsbruck, report:  "Preliminary analysis of a spectrum
of N Cas 1995, obtained under poor meteorological conditions at the
Asiago Observatory's Ekar Station with the 1.8-m telescope (+
Boller & Chivens spectrograph; range 470-680 nm) on Aug. 27.0 UT,
confirms this object to be a galactic nova probably caught during
its very early decline.  The continuum is blue and dominated by
emission lines of Balmer series and weaker lines due to Fe II
(multiplets 42, 48, 74).  The Na I line is detected in absorption.
The expansion velocities inferred from the FWHMs of H-alpha and H-
beta are about 800 and 600 km/s, respectively."
     Ohshima also reports the following prediscovery unfiltered
ST-6 CCD magnitudes obtained by K. Kosaka, Tamano, Okayama
(comparison stars GSC 3668.1745, 3668.2028; SAO 21994):  July 29.7
UT, [12.5; 30.7, 12.2:; 31.7, 11.6; Aug. 1.7, 11.0; 4.7, 10.4; 5.7,
9.9; 8.7, 9.6; 18.7, 9.8; 22.7, 9.5; 23.7, 9.2.  G. M. Hurst,
Basingstoke, England, reports prediscovery magnitudes from M.
Collins, Everton, Bedfordshire (2415 films):  Aug. 22.962 and
22.973, 9.0.  Visual magnitude estimates:  Aug. 27.177, 9.1 (J. E.
Bortle, Stormville, NY); 27.79, 9.0 (L. Kiss, Szeged, Hungary);
28.118, 8.9 (P. Schmeer, Bischmisheim, Germany).


1995 August 28                 (6214)            Daniel W. E. Green

Read IAUC 6213 SEARCH Read IAUC 6215

View IAUC 6214 in .dvi or .ps format.

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

Valid HTML 4.01!