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AAVSO Alert Notice

Alert Notice 473: T Tauri stars observing campaign

November 6, 2012:  Darryl Sergison (University of Exeter) has requested AAVSO assistance with a campaign he is organizing on six T Tauri stars. He writes: "In Autumn 2013 I [and my PhD supervisor Tim Naylor of Exeter University are] undertaking a new study into the nature of pre-main-sequence low mass stars, using time series optical spectroscopy and UV-Visual-IR photometry...to build a clearer picture of the environment around young solar-type stars and characterise their various disc, accretion, and outflow structures.

Alert Notice 472: Monitoring of HD 5980 requested for multiwavelength campaign

October 19, 2012:  Dr. Noel Richardson (Universite de Montreal, formerly at Georgia State University) has requested monitoring of the Small Magellanic Cloud eclipsing binary HD 5980 (in Tucana) as part of a multiwavelength campaign he is coordinating to study this unusual system. Dr. Richardson writes:

Alert Notice 468: Observing campaign on V380 Oph cancelled

August 21, 2012: The observing campaign on V380 Oph announced in AAVSO Alert Notice 466 (www.aavso.org/aavso-alert-notice-466) has been cancelled at the request of the principal investigators, Drs. Joseph Patterson and Arne Henden.

Alert Notice 467: Nova Monocerotis 2012 = PNV J06393874+0553520 [V959 Mon]

August 17, 2012

Nova Monocerotis 2012 = PNV J06393874+0553520  [V959 Mon]

Discovered by: Shigehisa Fujikawa (Kanonji City, Kagawa Prefecture, Japan, reported by Mitsuru Soma, National Astronomical Observatory of Japan)

Discovery Magnitude: magnitude 9.4 C using a 105mm camera lens+CCD

Discovery date: 2012 Aug. 09.8048 UT

Coordinates: 06 39 38.74 +05 53 52.0 (2000.0)

Alert Notice 465: Nova Sagittarii 2012 No. 5 = PSN J18193700-1907400 [V5593 Sgr]

July 20, 2012

Nova Sagittarii 2012 No. 5 = PSN J18193700-1907400  [V5593 Sgr]

Discovered by: Tadashi Kojima (Tsumagoi, Agatsuma-gun, Gunma-ken, Japan) (reported by S. Nakano (Sumoto, Japan)

Discovery Magnitude: mag 12.6 on two frames using a Canon EOS 40D camera (+ 150-mm f/2.8 lens)

Discovery date: 2012 July 16.512 UT

Coordinates: R.A. 18 19 37.0  Decl. -19 07 40 (2000.0)

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