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AAVSO Alert Notice

Alert Notice 402: Nova in Ophiuchus

August 17, 2009
 

Event: Nova in Ophiuchus     [V2672 Oph]

Discovered By: K. Itagaki (Teppo-Cho, Yamagata, Japan)

Discovery Date: 2009 August 16.515

Position: RA = 17h 38m 19.72s , Dec = -26d 44m 13.7s (+/- 0.6 arcsec
        from L. Elenin, Moscow, Russia, using the Tzec Maun 0.31-m
        Newtonian near Mayhill, NM)

Alert Notice 403: Request for observations of V2105 Oph in support of HST observations

August 30, 2009

 

Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested photoelectric photometry and bright star CCD photometry of the semiregular variable V2105 Oph beginning immediately.  These observations are in support of ultraviolet spectroscopy to be obtained with the Hubble Space Telescope on Wednesday, September 2, 2009.  Observations are requested to continue through Sunday, September 6, 2009.

Alert Notice 404: Supernova 2009ig has brightened

September 21, 2009
 

Event: Type-Ia Supernova 2009ig in NGC 1015 has brightened

Discovered By: I. Kleiser, S. B. Cenko, W. Li, and A. V. Filippenko, University of California (LOSS discovery on unfiltered KAIT images)

Discovery Date: Aug. 20.48 UT

Alert Notice 405: Request for observations of NSV 99 (khi Peg) in support of HST observations

October 2, 2009
 

Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested photoelectric photometry and bright star CCD photometry of the semiregular variable NSV 99 (= khi Peg) beginning immediately.  These observations are in support of ultraviolet spectroscopy to be obtained with the Hubble Space Telescope in late October and late November 2009. Observations are requested to continue through the end of November 2009.

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.

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