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AAVSO Alert Notice 303

Subject: 1813-28B NOVA SAGITTARII 2004 - POSSIBLE NOVA IN SAGITTARIUS

Event: Possible nova

Announced in: IAU Circular 8306, 17 March 2004

Discovered independently by:
- Hideo Nishimura, Kakegawa, Shizuoka-ken, Japan (reported via S. Nakano, Sumoto, Japan, IAUC 8306)
- William Liller, Vina del Mar, Chile

Discovery Magnitude:
- Nishimura: magnitude 9.4 (two Fuji T-Max films taken with a Pentax 200-mm f/4 lens) (IAUC 8306)
- Liller: magnitude 8.2: (two Technical Pan films taken with an 85-mm Nikon camera lens + red filter)

Discovery Date:
- Nishimura: both films taken around Mar. 15.82 UT (IAUC 8306)
- Liller: Mar. 17.342 and 17.346 UT

Position (equinox 2000.0):
- Nishimura: R.A. = 18h 19m 28s, Decl. = -28o 35' 34" (IAUC 8306)
- Liller: R.A. = 18h 19.6m, Decl. = -28o 35'
- Doug West, Mulvane, KS, provides the following precise position from a CCDV image taken by him March 17.489 UT: R.A. = 18h 19m 32.29s, Decl. = -28o 36' 35.7"; image posted on AAVSO website (see Notes, below)

Magnitude History:
- Nishimura: nothing visible at this location on patrol films taken Mar. 12.82 UT (limiting mag 10.5) (IAUC 8306)
- Liller: nothing visible at this location on exposures taken Feb. 26.38 UT (limiting mag 11.0)
- West: nothing visible at this location on a red Digitized Sky Survey image (limiting mag approximately 17.5)

AAVSO Chart(s): 'd' scale chart, based on West's position, available at http://www.aavso.org/cgi-bin/searchcharts3.pl?name=n%20sgr%2004 [4]

Report Object to the AAVSO as: 1813-28B N SGR 04

Additional Observations Reported to the AAVSO: MAR 17.4889 UT, 8.38 CCDV (+/- 0.07), D. West, Mulvane, KS; 17.5556, 8.1, R. Royer, Springville, CA; 17.6313, 8.5, J. Bedient, Honolulu, HI; 17.821, 8.7, A. Pearce, Nedlands, W. Australia.

Spectra: none to date

Notes: AAVSO website page at http://www.aavso.org/news/nsgr04.shtml [5]

SUBMIT OBSERVATIONS TO THE AAVSO

We encourage observers to submit observations via our web site [6] (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!

Elizabeth O. Waagen
Interim Director