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AAVSO Alert Notice

Alert Notice 407: Outburst of the UGWZ-type dwarf nova EG Cancri

October 12, 2009
 

The WZ Sge-type dwarf nova EG Cancri has been reported in outburst by Ian Miller (Swansea, Wales).  He reported EG Cnc at m(CV) = 14.3 on 2009 October 12.138 (JD 2455116.638).  Subsequent unfiltered time series observations by Miller reported to the AAVSO confirm EG Cnc at around magnitude 14.3; the star declined by approximately 0.1 magnitudes during the two-hour span of the time series.  Observations of EG Cnc are urgently requested at this time, including visual estimates, CCD photometry, and CCD time-series observations.

Alert Notice 409: V5584 Sgr = Nova Sagittarii 2009 Number 4

October 29, 2009

 

Event: Nova in Sagittarius (V5584 Sgr = N Sgr 2009 No. 4)

Discovered By: Koichi Nishiyama, Kurume, Fukuoka-ken, Japan, and F. Kabashima, Miyaki-cho, Saga-ken, Japan

Discovery Date: Oct. 26.439 UT (two frames from Oct. 26.439 and 26.440)

Discovery Magnitude: unfiltered CCD magnitude 9.3, using a 105-mm f/4 camera lens

Alert Notice 490: Optical monitoring of T Ori requested

August 30, 2013: Dr. William Herbst (Wesleyan University) and Rachel Pedersen (Bates College) have requested AAVSO assistance in monitoring the Orion variable T Ori in support of spectroscopy they will be obtaining during September 2013. AAVSO nightly coverage (visual or electronic, not time series) of this star is crucial throughout the month of September.

AAVSO Alert Notice 489: Nova Delphini 2013 = PNV J20233073+2046041 [V339 Del]

August 16, 2013

Event: Nova Del 2013 = PNV J20233073+2046041  [V339 Del]

Discovered by: Koichi Itagaki (Teppo-cho, Yamagata, Japan), reported by S. Nakano (Sumoto, Japan)

Discovery Magnitude: unfiltered CCD magnitude mag 6.8 using a 0.18-m reflector

Discovery date: 2013 Aug. 14.584 UT

Coordinates: R.A. 20 23 30.73  Decl. +20 46 04.1  (2000.0)

Alert Notice 421: Nova in Scorpius (V1311 Sco = N Sco 2010 No. 2)

May 5, 2010
 
Event: Nova in Scorpius (V1311 Sco = Nova Sco 2010 No. 2)
 
Discovered Idependently By:
- Koichi Nishiyama, Kurume, Japan, and Fujio Kabashima, Miyaki, Japan
- Hideo Nishimura, Miyawaki, Kakegawa, Shizuoka-ken, Japan (reported via S. Nakano, Sumoto, Japan, in CBET 2262)
- Tadashi Kojima, Tsumagoi, Agatsuma-gun, Gunma-ken, Japan (reported via S. Nakano, Sumoto, Japan, in CBET 2262)

Alert Notice 420: Nova in Sagittarius (V5586 Sgr = Nova Sgr 2010 No. 2)

April 26, 2010


Event: Nova in Sagittarius (V5586 Sgr = Nova Sgr 2010 No. 2)

Discovered By: Koichi Nishiyama, Kurume, Japan, and Fujio Kabashima, Miyaki, Japan

Discovery Date: Apr. 23.782 UT using a 105-mm f/4 camera lens (+ SBIG STL6303E camera)

Discovery Magnitude: unfiltered CCD magnitude 11.2

Alert Notice 419: Nova eruption in V407 Cyg

March 15, 2010: According to CBET 2199, 2204, and 2205, the suspected symbiotic star V407 Cyg has been observed in an anomalously bright outburst, and subsequent spectroscopic observations by multiple observers show clear signs of a classical nova. Observations of this anomalous event are requested immediately, and observers are asked to continue observing this object until it returns to its previous quiescent level.

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