Skip to main content

Alert Notice 280: 1748-26 Nova Sagittarii 2001 [V4643 Sgr]

We recently released a significant update to the backend systems for the AAVSO website. While most of the bugs introduced by this update have been fixed, there may still be problems we haven't fixed. If you run into a problem, please email webmaster@aavso.org

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 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
Circular 7589
).

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:

                         http://www.aavso.org

They may also be obtained directly from our FTP site:

             ftp.aavso.org (198.116.78.2), 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
to observations@aavso.org.

Many thanks for your valuable astronomical contributions and your efforts.

Good observing!

Janet A. Mattei
Director

Elizabeth O. Waagen
Senior Technical Assistant

---------------------------------------------------‬
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at‭:‬
http‭://‬www.aavso.org/webobs

ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

An Alert Notice archive is available at the following URL‭:‬
http‭://‬www.aavso.org/alert-notice-archive

Subscribing and Unsubscribing may be done at the following URL‭:‬
http‭://‬www.aavso.org/observation-notification#alertnotices

-------------------------------------------------

Please support the AAVSO and its mission -- Join or donate today:
http://www.aavso.org/apps/donate/

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