Alert Notice 280: 1748-26 Nova Sagittarii 2001 [V4643 Sgr]
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
Tel. 617-354-0484 Fax 617-354-0665
AAVSO ALERT NOTICE 280 (February 26, 2001)
1748-26 NOVA SAGITTARII 2001
We have been informed by AAVSO member William Liller, Vina del Mar, Chile, and
the Central Bureau for Astronomical Telegrams (IAU Circular 7589) that Liller
photographically discovered a nova in Sagittarius at magnitude 7.7 on images
taken February 24.369 and 24.371 UT, using Tech Pan film and an 85-mm camera
lens (+ orange filter). Nothing is seen at the location of the nova down to
magnitude 11.0 on films taken by Liller on Feb. 14.
Liller measured the position of N Sgr 01 on CCD frames taken by him on Feb.
25.388 UT with an 0.2-m f/1.5 Schmidt camera:
R.A. = 17h 54m 40.46s Decl. = -26 degrees 14' 15.2" (2000.0)
Spectroscopic confirmation of the nova was obtained by Liller via a
low-dispersion CCD objective-prism spectrogram taken by him, and by K. Ayani
and T. Kawabata, Bisei Astronomical Observatory, Japan, who obtained a
low-resolution spectrum of the nova on Feb. 25.88 UT with the Bisei 1.01-m
telescope (IAU Circular 7589).
Additional observations of N Sgr 01 reported to the AAVSO include: Feb.
25.215 UT, 8.5, P. Schmeer, Bischmisheim, Germany; 25.2410, 8.5, A. Amorim,
Florianapolis, Brazil; 25.3676, 8.07 CCDV, W. Liller, Vina del Mar, Chile;
25.694, 8.9, R. Stubbings, Drouin, Victoria, Australia; 25.710, 7.9 CCD
unfiltered, J. Broughton, Reedy Creek, Queensland, Australia (via IAU
Accompanying is an AAVSO preliminary 'b' scale chart of 1748-26 N Sgr 01
prepared by C. Scovil and K. Malatesta, AAVSO Headquarters. Please use it to
observe the nova, and report your observations to AAVSO Headquarters, making
sure to indicate which comparison stars you used.
Congratulations to Bill on his latest discovery!
CHARTS AVAILABLE ON AAVSO WEB AND FTP SITES
Chart links obsolete, 11/2013: Create charts using VSP at http://www.aavso.org/vsp
Electronic copies of the chart of Nova Sgr 2001 mentioned in this Alert Notice
are available through our web site at the following address:
They may also be obtained directly from our FTP site:
ftp.aavso.org (188.8.131.52), in /alerts/alert280
The answering machine at AAVSO Headquarters is on nights and weekends for
your convenience. Please call our charge-free number (888-802-STAR =
888-802-7827) to report your observations. We also encourage observers to
send observations by fax to 617-354-0665 or by e-mail through the Internet
Many thanks for your valuable astronomical contributions and your efforts.
Janet A. Mattei
Elizabeth O. Waagen
Senior Technical Assistant
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