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AAVSO Alert Notice 300

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 300 (March 24, 2003)

SUBJECT: 1009+03B SUPERNOVA 2003CG IN NGC 3169

1009+03B SUPERNOVA 2003CG IN NGC 3169 (SEXTANS)

Event: Supernova

Independently Discovered By: K. Itagati, Teppo-machi, Yamagata, Japan; R. Arbour, South Wonston, Hampshire, England (IAUC No. 8097)

Discovery Magnitude: 14.4 unfiltered CCD (0.60-m f/5.7 reflector, Itagati); 14.5 unfiltered CCD (0.30-m f/6.3 reflector, Arbour) (IAUC No. 8097)

Discovery Date: March 21.51 UT (Itagati); March 22.835 UT (Arbour) (IAUC No. 8097)

R.A. of NGC 3169 (2000): 10h 14m 15s.97 Decl. of NGC 3169 (2000): +03o 02.5’ 14”.4 (IAUC No. 8097)

Supernova Position: 14” east and 5” north of the nucleus of NGC 3169 (IAUC No. 8097)0

AAVSO Chart(s): ‘f’scale chart

Report Object to the AAVSO as: 1009+03B SN 2003CG

Observations Reported to the AAVSO: March 13.3 UT, <19.0: CCD, K. Itagati, Teppo-machi, Yamagata, Japan; 22.3, 14.9 CCD, Itagati; 22.444, 14.3 CCD, Itagati; 22.559, 15.5 CCD through clouds, Y. Kushida, Yatsugatake South Base Observatory; 24.1368, <14.9, M. Simonsen, Macomb, MI. (All observations from IAUC No. 8097, except the last reported to AAVSO HQ by M. Simonsen.)

Notes: 1. M. Simonsen reports that supernova is currently difficult to observe with a 12” telescope and suggests that since the object is so close to the nucleus of NGC 3169 and since the galaxy is bright, it might become more apparent once it rises to a visual magnitude of ~14.5. 2. SN 1984 E also appeared in NGC 3169. 3. See the full announcement in International Astronomical Union Circular (IAUC) No. 8097.

SUBMIT OBSERVATIONS TO THE AAVSO

We encourage observers to submit observations via our web site (online data submission tool WebObs), or by email in AAVSO format to observations@aavso.org. If you do not have AAVSO Observer Initials, please contact Headquarters so we may assign them to you. The answering machine at AAVSO Headquarters is on nights and weekends; use our charge-free number (888-802-STAR = 888-802-7827) to report your observations, or report them via fax (617-354-0665).

Many thanks for your valuable astronomical contributions and your efforts.

Good observing!

Janet A. Mattei
Director

Kerriann H. Malatesta
Technical Assistant

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