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		THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 
			25 Birch Street, Cambridge, MA 02138 USA
				Internet: aavso@aavso.org 
			Tel. 617-354-0484	FAX 617-354-0665

			AAVSO ALERT NOTICE 216 November 3,1995

0945+34 SUPERNOVA 1995al IN NGC 3021

We have been informed by Mirko Villi (Forli, Italy) and the Central Bureau for 
Astronomical Telegrams (IAU Circular 625.5) of the visual discovery of a supernova in 
NGC 3021 by Stefano Pesci and Piero Mazza (Milan, Italy) on Nov 1.04 UT, at visual 
magnitude 13.0-13.5 using a 0.35-m telescope. They report that nothing unusual was noted 
at this location on Oct 25.2 UT to a limiting magnitude of about 16.0. They also report that 
no object appears at this position on the Palomar Sky Survey

The supernova is located 15" W and 2.9" S of the nucleus of NGC 3021. The (2000) position 
of the supernova is:

	RA 09h 5Om 55.97s	Dec. +33deg 33m 09.4s (IAU Circ. 6253)

C. Pollas, Observatoire de la Cote d'Azur (OCA) reports that a star of about mag.(V) 14.3 
was detected on a 10-min exposure plate with the OCA Schmidt telescope on Nov 2.19 UT. 
This object does not appear on the original Palomar Sky Survey ( IAU Circ. 6255).

G. Hurst (Basingstoke, England) estimated the brightness of SN 1995a1 at mag 13.2 from 
an unfiltered CCD image obtained by M. Armstrong (Rolvenden, UK) on Nov 2.1 UT, 
with 0.25-m Schmidt Cassegrain telescope (IAU Circ, 625S). G. Emerson (Golden, 
Colorado) estimated the magnitude of SN 1995a1 at about 13.2 on an unfiltered CCD 
image taken with a 0.25-m telescope on Nov 2.5 UT.

Please use the accompanying AAVSO Preliminary "e" scale chart prepared by C. Scovil 
using the sequence from the Hippancos Input Catalog (photoelectric), and the Guide Star 
Catalog (via vsnet, Kyoto U.), to observe SN 1995a1. When reporting observations to 
AAVSO Headquarters, please be sure to indicate which chart and which comparison stars 
you used to make your estimates.

There is a nearby star east-northeast of the nucleus of NGC 3021, at mag. (V) 16.0 (IAU 
Circ. 625.5). This star is indicated as mag.14.1 in the Guide Star Catalogue

Congratulations to Stefano Pesci and Piero Mazza for their visual discovery of SN 1995al in 
NGC 3021!

FADING OF 1544+28a R CORONAE BOREALIS CONTINUES

R CrB is continuing to fade (see AAVSO Alert Notices 214, 215). Please observe it closely 
and report your observations to AAVSO Headquarters. Below is a list of observations of R 
CrB that we have received since AAVSO Alert Notice 215, from our observers worldwide by 
phone, fax, or email:

Oct 16.75 UT, 9.5, J. Gunther, St. Oze, France; 16.7861, 9.4, M. Biesmans, Essen, Belgium; 
16.791, 9.1, D. Rodriguez, Madrid, Spain; 16.81, 9.4, A. Pereira, Carnaxide, Portugal; 
16.9861, 9.6, P. Steffey, Daytona Beach, FL; 16.994, 8.9, F. West, Hanover, PA; 16.9944, 
9.8, R. A. Komorous, London Ontario, Canada; 17.0125, 9.7, J. Bortle, Stormville, NY; 
17.0799, 9.7, W. Dillon, Missouri City, TX; 17.683, 10.1, O. Gabzo, Bhei-Brak, Israel; 
17.684, 10.2, O. Shemmer, Ra'anana, Israel; 17.72, 10.1, L. Kiss, Szeged, Hungary; 17.74, 
10.3:, J. Csanyi, Szeged, Hungary; 17.75, 10.1, M. Zanotta, Milano, Italy; 17.977, 9.8, P. 
Dombrowski, Glastonbury, CT; 17.9993, 10.2, J. McKenna, Upper Montclair, NJ; 18.09, 
10.5, G. Rosenberg, Tucson, AZ; 18.13, 10.2, C. Spratt, British Columbia, Canada; 18.76, 
10.6, R. Bouma, Groningen, Netherlands; 18.765,10.7, B. Granslo, Nordahl Griegs Vei, 
Norway; 18.77,10.4, G. Comello, Groningen, Netherlands; 18.791, 10.5, Rodriguez; 18.80, 
11.1, Pereira; 18.8, 10.7, Pereira; 18.812, 20.7, J. Osorio, Madrid, Spain; 18.9903, 10.8,

Komorous; 19.0500,10.9, Dillon;19.09,10.9, Rosenberg;19.6680, 10.9, Gabzo; 19.6715, 
10.7, Shemmer; 19.72, 11.3, Kiss; 19.75, 10.9, L. Szentasko, Budapest, Hungary; 19.789, 
10.9, M. Westlund, Uppsala, Sweden; 19.812, 11.2, Granslo; 19.852, 10.9, O. Skjaeraasen, 
Oslo, Norway; 19.969, 10.9, Dombrowski; 19.9896, 11.3, Steffey; 19.9979, 11.0, C. Stephan, 
Sebring, FL; 20.0146, 11.1, G. Gliba, Chagrin Falls, OH; 20.0750,11.2, W. Kaminski, Rapid 
City, SD; 20.0778, 10.9, M. Heifner, Denver, CO; 20.09, 11.1, Rosenberg; 20.1021, 11.0, 
Kammski; 20.7, 11.5, Szentasko; 20.728, 11.6, Granslo; 20.75, 11.7, Comello; 20.843, 11.8, 
Osorio; 21.0382, 11:5, Dillon; 21.7, 11.9, Szentasko; 21.74, 11.5, M. Fonovich, Plomin, 
Republic of Croatia; 21.7611, 11.5, Westlund; 21.763, 11.7, G. Poyner, Birmingham, 
England; 21.79, 11.6, Comello; 21.812, 11.6, F. Pujol, Madrid, Spain; 21.812, 11.7, J. Sainz, 
Madrid, Spain; 21.812,11.6, Rodriguez; 21.812,11.8, Osorio; 21.9861,11.7, Steffey; 22.0090, 
11.4, Stephan; 22.7, 12.0, Szentasko; 22.72, 11.7 , Fonovich; 22.791, 11.8, Osorio; 22.9618, 
11.6, McKenna; 22.969,12.4, Dombrowski; 22.9785, 11.6, Komorous; 22.9979,11.7, Bortle; 
23.0125,11.5, Stephan; 23.75, 11.9, Comello; 24.0229,11.9, T. Hager, New Milford, CT; 
24.0444, 11.4, Heifner; 24.0729, 11.7, Kaminski; 24.73, 21.9, Kiss; 24.75, 11.9, Comello; 
25.0660, 11.9, Kaminski; 26.0458, 11.8, A. Dill, Wichita, KS; 26.5569, 12.1, D. York, 
Abiquiu, NM; 26.74, 11.9, Zanotta; 26.9653, 12.0, R Stewart, Fairlawn, NJ; 26.9861, 12.2, 
Bortle; 27.0014, 12.4, Stephan; 27.0014, 12.4, Stephan; 27.771, 11.8, Poyner; 28.0986, 12.2, 
Kaminski; 28.73, 12.3, Zanotta; 28.770, 12.8, Osorio; 29.74, 12.1, Comello; 29.770, 12.8, 
Osorio; 29.9757, 12.2, Komorous; 30.69, 12.5, Comello; 30.9840, 12.5, Bortle; 30.9903, 12.4, 
Komorous; 31.7368,12.9, Zanotta; Nov 2.75 UT, 12.1, Szentasko.

FADING OF 1510+82 Z URSAE MINORIS

The recently re-classified R Coronae Borealis star, Z UMi (see AAUSO Alert Notice 195), is 
fading as indicated by the following observations:

Sep 02.880 UT, 11.0, G. Poyner, Birmingham, England; Oct 01.82 UT, 11.7, G. Comello, 
Groningen, Netherlands; 04.814,12.3, Poyner; 6.87,11.8, Comello; 08.826,12.2, Poyner; 
9.9535, 11.6, J. Bortle, Stormville, NY; 10.794, 12.4, Poyner; 15.815, 12.5, Poyner; 17.0132, 
12.1, Bortle 18.76, 12.2, R. Bouma, Gronigen, Netherlands; 18.838, 12.4, Poyner; 19.76, 
12.3, L. Szentasko, Budapest, Hungary; 20.78, 12.3, Comello; 20.853, 12.4, Poyner; 21.813, 
12.4, Poyner; 21.87, 12.1, Comello; 23.0271, 12.3, Bortle; 24.83, 12.4, Comello; 27.0139, 
12.3, Bortle; 27.787, 12.4, Poyner; 28.905, 12.4, Poyner; 29.967, 12.4, Poyner; Nov 02.76, 
12.8, Szentasko.

Accompanying is a "d" scale AAVSO Preliminary chart, prepared by C. Scovil, using 
photoelectric V) sequence of Grenon et al, and R. Stanton. Please use this chart to 
observe Z UMi and report which chart and which comparison stars you used in making 
your estimates.

CHARTS AVAILABLE ON AAVSO FTP SITE

We have prepared electronic copies of the AAVSO charts for SN 1995al and Z UMi 
mentioned in this Alert Notice. It is available from our FTP site:

		ftp.aavso.org (198.116.78.2), in /pub/alert216

The answering machine at AAVSO Headquarters is on nights and weekends for your 
convenience. Please call our charge-free number (800-642-3883) to report your 
observations. We also encourage observers to send observations by fax to 617-354-0665 or 
by e-mail through the Internet to observations@aavso.org.

Many thanks for your significant astronomical observations and efforts.

Good observing!

Janet A. Mattei 
Director

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