ASAS overview

The ASAS 1-2 systems

Low cost prototype instrument (ASAS-1, ASAS-2), equipped with 768x512 Kodak CCD and 135/1.8 telephoto lens, mounted on the robotic mount (developed at the Warsaw University Astronomical Observatory ) operateed at the Las Campanas Observatory, Chile since April 7, 1997 till June 6, 2000. It was taking over 120 3-minute exposures per night, continuously monitoring about 300 sq. degs of the sky.

Later it was moved to the slide-roof dome of 10" astrograph, where it three years.
Data obtained in the years 1997-2000 are now available as:
The ASAS Photometric I-band Catalog - giving interactive access to > 50 milion measurements of > 140,000 stars;
Sky Atlas - graphic interface to the I-band Catalog and
The ASAS Catalog of Variable Stars containing over 350 Periodic and 3500 Miscellaneous variables. The ASAS Gallery presents collection of the variables' light curves.

Here is the ASAS All Sky Projection showing fields monitored from 1997 to 2000 by the ASAS-1 and ASAS-2 instruments. Click on any of them and enter the ASAS Catalog Sky Atlas.