News and Announcements
|07 January||Alert Notice 429: Photometry requested for three "Vestoid" Near-Earth Objects||
January 8, 2011: Dr. Michael David Hicks (Jet Propulsion Laboratory) contacted the AAVSO requesting precision photometry of three solar system objects in support of NASA's DAWN mission to Vesta. These objects, called "Vestoids", are near-Earth objects with similar reflectance spectra to Vesta itself, suggesting they may be fragments of that larger body.
|07 January||AAVSO Newsletter 47 now online||
AAVSO Newsletter for January 2011
|05 January||ejaavso preprint "Studies of "Irregularity" in Pulsating Red Giants. III. by J. R. Percy, E. Terziev|
|04 January||Online Chat: Jan. 4 at 4pm||
We will be hosting a Citizen Sky online chat this Tuesday at 4pm eastern (-5UT). Dr. Bob, Brian Kloppenborg, Rebecca, Aaron and other Citizen Sky and AAVSO staff will be on hand. Topics will include updates on epsilon Aurigae, the upcoming AAS meeting, and ideas for research teams. However, it will be a free chat so any AAVSO/Citizen Sky/VSO topic is welcomed.
|03 January||AAVSO Special Notice #227||
Unusual Behavior of FS Aur - Outburst Imminent?
January 3, 2011: The campaign to monitor activity of the peculiar cataclysmic variable FS Aurigae, as announced in AAVSO Alert Notice 428 (see also AAVSO Special Notice #226), continues. Principal Investigator Dr. Vitaly Neustroev reports that the campaign is going well, and that he is very appreciative of your observing efforts and contributions.
|29 December||Southern 10-Star Tutorial||
Over at Citizen Sky we just published a Southern Hemisphere version of our 10-Star Training Tutorial. It is similar to the original tutorial except that it includes stars and charts for the Southern Hemisphere and is not focused on epsilon Aurigae.
|20 December||ejaavso preprint "Anchoring the Universal Distance Scale Via a Wesenheit Template" by Daniel J. Majaess et al.|
|20 December||ejaavso preprint "VX Hydrae: Observation of a Sudden Change in a Pulsating Star" by M. Bonnardeau, S. Dvorak, R. Poklar, G. Samolyk|
|17 December||ejaavso preprint "The Variable Star HD 173637" by A. U. Landolt|
|16 December||2011 JD Calendar||
The 2011 JD Calendar is now available.
|15 December||JAAVSO v38 nr2 is now online!|
|15 December||Request Comparison Stars for Variable Star Charts||
[Note: If your variable star has an existing sequence, even if it is only one comparison star, please request assistance via CHET. This page is only for variables that have NO comparison stars. Thank you.]
|13 December||ejaavso preprint "The First Historical Standstall of WW Ceti" by M. Simonsen and R. Stubbings|
|07 December||Charts and Sequences Update December 2010||
|07 December||AAVSO Centennial Calendar for 2011||
A Century of Variable Star Observing: 1911-2010
|07 December||ejaavso preprint "Recent minima of 144 EB stars" by G. Samolyk|
|07 December||Help us test the New Chat Room||
We would like to do one more test of the new AAVSO chat software before we officially go live with it and we need your help!!
We'd like to get a chat going with a large group of people so if you are free today at 5:30 pm Eastern, please take a few minutes to visit: http://www.aavso.org/general-chat
Be sure to let us know of any issues you have - either via the chat, by email, or using the "contact us" form on the AAVSO web page.
|06 December||30 Min Downtime at 1700UTC 6 Dec||
The AAVSO network, including the website, will be unavailable for about 30 minutes at 1700UTC (1200EST) on 6 December for the installation of a new network card in the firewall.
|04 December||AAVSO Special Notice #226||
Request for observations of FS Aurigae
|02 December||AAVSOnet Online Discussion Forum||
We have created an online forum for discussion of AAVSOnet topics. Arne will moderate the forums, post announcements regarding AAVSOnet systems and answer any questions you have. If you have any interest or questions about AAVSOnet, please stop by. No question is too silly.
|01 December||AAVSO Special Notice #225||
A new UGWZ candidate in Pisces
|01 December||100 Years of Citizen Science||
|30 November||Alert Notice 428: Monitoring requested of the peculiar cataclysmic variable FS Aurigae||
November 30, 2010: Dr. Vitaly Neustroev (U.
|26 November||Symbiotic Variable Star On the Verge of an Eruption?||
|23 November||Alert Notice 427: Observing campaign on BM Ori and the Trapezium region||
November 23, 2010: The AAVSO requests ground-based observations of the Trapezium region of the Orion Nebula (M42), along with surrounding regions in Orion, in conjunction with upcoming observations with the MOST Satellite. All AAVSO observers are encouraged to participate in this project, and we are requesting observations for a number of different targets from both instrumental and visual observers.