AAVSOThe American Association of Variable Star Observers

Cambridge, Massachusetts

AAVSOObservers

The definition of backyard telescope has changed dramatically in the last decade

Amateur astronomers equipped with sophisticated telescopes and CCDs producing scientific results has become the norm

Transient Events

AAVSO observers obtained crucial early data for the outburst of V838 Mon, one of the most unusual novae this century

Collaboration

AAVSO observers notify astronomers using space telescopes of unusual or transient activity from the ground

The SWIFT satellite notifies AAVSO observers of gamma ray bursts

AAVSO Data The AAVSO International Database

contains over 19 million observations The database grows by nearly a million

observations per year Data like these are critical to stellar

research

VSX

The International Variable Star Index

Maintained by the AAVSO, VSX is the largest, most up to date single source for information on variable stars

New discoveries are constantly being added to the database

AAVSOnet

The AAVSO has robotic telescopes, including two ongoing photometric survey systems, available for professional and amateur research projects.

Telescopes range from 60mm to 0.6m

AAVSO Chart Software

Custom charts can be generated for any area of the sky in any field size, orientation or limiting magnitude.

AAVSO comparison star sequences utilize the best photometry available in the world.

Portal for Researchers

to facilitate your use of the AAVSO's resources in your research efforts

find information about obtaining AAVSO data

request new observations

learn more about the AAVSO, its data, and its services for the research community

Publications

The Journal of the AAVSO (JAAVSO)

CCD Observing Manual Visual Observing Manual Solar Bulletin Variable Star of the Season Annual Report AAVSO Newsletter

Membership Benefits Access to AAVSOnet, our robotic

telescope network Staff, observer and technical support for

observing campaigns Access to the Journal of the AAVSO and

the quarterly Newsletter Waiver of page charges in the Journal Access to special web-based tools and

information Discounted meeting registration Voting privileges

AAVSO Meetings

Members present their research; and exchange ideas about observing, techniques, problems and solutions

Annual fall meetings are held in Cambridge, Massachusetts Other recent US meetings- Tucson, AZ; Madison, WI; San Francisco, CA,

Waikoloa Beach, HI Recent International meetings- Mendoza, Argentina; Calgary, Canada;

Cambridge, England