Skip to main content

AAVSO Alert Notice

Alert Notice 475: Monitoring of the dwarf nova U Geminorum in support of HST observations

December 22, 2012: As announced by Dr. Matthew Templeton (AAVSO) in AAVSO Special Notice #316 (www.aavso.org/aavso-special-notice-316), Dr. Michael Shara (American Museum of Natural History, Columbia University) has requested dense coverage of the dwarf nova U Gem in support of HST Cosmic Origins Spectrograph (COS) observations scheduled for now through February 20, 2013.

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)

Pages

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