This project, aka TASS, is building astronomical cameras and distributing them to sites around the world; our goal is to study bright objects across large sections of the sky. Our first major project was Mark III Survey of the Celestial Equator, based on several Mark III cameras, like this one at the Johns Hopkins Applied Physics Lab: The Mark III operated in drift-scanning mode, so it was limited to areas near the celestial equator; in addition, it could not follow targets of interest. Nonetheless, we were able to compile a catalog of over 350,000 stars measured in at least two passbands; you can query our 'tenxcat' catalog. The Mark IIIs also took some pretty pictures, like this section of the Milky Way:
We are now working on a bigger, better camera, the Mark IV, which is able to look away from the celestial equator and follow objects for several hours. The first one has already been delivered to Flagstaff, where it has started a two-passband survey of the northern sky and taken some pictures of its own. Other Mark IV cameras have been acquiring images from Batavia, IL; you can query a database of the Mark IV results.
If this is your first visit to the TASS site, you might want to read some of the following:
When you are ready, enter the TASS technical area.
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Last modified May 7, 2003.