THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA INTERNET: email@example.com Tel. 617-354-0484 Fax 617-354-0665
AAVSO ALERT NOTICE 315 (March 21, 2005)
SUBJECT: 1612-51 N NOR 05
Discovered By: William Liller, Viña del Mar, Chile
Discovery Magnitude: Red magnitude 9.4 on hypersensitized TP films taken with an 85mm f/1.4 Nikon lens and with an orange filter.
Discovery Date: March 13.309 UT
Position: R.A. (2000): 16h 19.8m Decl. (2000): -51o 35' (by Liller; also see notes below)
Spectra (from Central Bureau Electronic Telegram (CBET) 124): A. Ederoclite, E. Mason, and T. H. Dall, European Southern Observatory (ESO), report spectroscopic confirmation made with the 3.6-m ESO telescope (+ HARPS; range 380-690 nm; resolution 100000). The nova appears dominated by very strong H_alpha emission. Low-ionization emissions lines from Fe II (multiplets 27, 28, 37, 38, 42, 48, 49, and 74) and Na I are clearly visible. The Balmer and Fe II lines are flanked by weak P-Cyg profiles that indicate an average expansion velocity of 1100 +/- 100 km/s. The Na I interstellar lines appear saturated, thus suggesting a high absorption/reddening.
AAVSO Chart(s): Due to significant Chart Team presence at the The 3rd High-Energy Astrophysics Workshop for Amateur Astronomers and The 94th Spring Meeting of the AAVSO in Las Cruces, New Mexico (March 20 - 26, 2005), an AAVSO chart will be forthcoming. In the meantime, observers are referred to the following charts prepared by Sebastian Otero, Buenos Aires, Argentina:
Report Object to the AAVSO as: 1612-51 N NOR 05
Observations Reported to the AAVSO: Mar. 09.37 UT, <11.0 PTG with orange filter (red magnitude), William Liller, Chile; 13.309, 9.4 PTG with orange filter (red magnitude), Liller; 18.32, 8.9 PTG with orange filter (red magnitude), Liller; 20.038, 9.8 CCDV, B. Monard, S. Africa; 20.04, 8.5 CCDR, Monard; 20.195, 10.1, Raquel Yumi Shida, Brazil; 20.326, 10.10 CCDV, Liller; 20.326, 10.90 CCDB, Liller; 20.516, 10.4 CCDV, Peter Nelson, Australia; 20.521, 9.7, Rod Stubbings, Australia; 20.88, 10.1, Andrew Pearce, Australia.
Congratulations to Bill on his discovery!
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Many thanks for your valuable astronomical contributions and your efforts.
On behalf of,
Elizabeth O. Waagen
Senior Technical Assistant