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			THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 
				25 Birch Street, Cambridge, MA 02138 USA
			BITNET: aavso@cfaS SPAN: nssdca::cfa8::aavso
			Tel. 617-354-0484	FAX 617-354-0665


			AAVSO ALERT NOTICE 158 (July 2, 1992)


SUPERNOVA IN NGC 4411B

We have been informed by Robert O. Evans (Hazelbrook, Australia), Chairman of the 
AAVSO Supernova Search Committee, and the Central Bureau for Astronomical Telegrams 
(IAU Circular 5552) of the visual discovery by Robert Evans of a supernova in NGC 4411B 
on July 1.375 UT at magnitude approximately 13.5. The supernova was visually confirmed 
by Thomas Cragg (Anglo-Australian Telescope, Coonabarabran, Australia) on July 2.4 UT.

The supernova is situated 40 seconds east and 40 seconds south of the nucleus of the 
galaxy. The supernova's 1950 position, measured by Robert McNaught (Anglo-Australian 
Observatory), is

			R.A. = 12h 24m 17.04s   Decl. = +90deg 09' 14.2"

There is a magnitude 13.0 star on the northwest side of the galaxy at 12h 24m 10.24s, +090
10' 24.4".

IAU Circular 5552 reports that spectroscopic observations at the Anglo-Australian Telescope on 
July 2 exhibited "hydrogen Balmer lines with characteristic P-Cyg line profiles, indicating a 
type-II supernova."

Accompanying are finder charts of the field from the Photographic Atlas for Supernova Search, 
Volume II, by Manuel Lopez Alvarez, and from the AAVSO Variable Star Atlas. Also accompanying 
is the AAVSO "c" scale chart for R Virginis, which is fairly close to the galaxy.

Congratulations to Bob on his first discovery of 1992!

SUCCESSFUL LAUNCH OF NASA's EXTREME ULTRAVIOLET EXPLORER AND DETECTION OF FIRST UGHT

NASA's Extreme Ultraviolet Explorer (EUVE) was successfully launched on June 7, 1992, from 
Cape Canaveral in Florida on a Delta rocket. All seven detectors of the EUVE observatory were 
turned on successfully on June 21, and the first EUV sky images were obtained. The satellite 
will begin its survey in late July. Together with the EUVE Science Team, we have finalized 
the targets that variable star observers worldwide will be monitoring for EUVE. All observers 
will be informed of these targets and finder chart information for them very soon. Please 
keep a close eye on observable cataclysmic variables, as most of the objects on our EUVE 
observing list are cataclysmic variables.

Thank you very much for your effortS and your observations. 

Good observing!


Janet A. Mettei
Director

Keywords:
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484