(surveys providing early images of quasars and Seyfert galaxies)
The still-referenced Tonantzintla Surveys
were conducted in the 1950s and 1960s with the Schmidt camera at
Mexico's Tonantzintla Observatory,
largely looking for flaring stars,
and incidentally imaging objects later identified as quasars
and Seyfert galaxies.
Discoveries were numbered and some objects are still identified by
their Tonantzintla number.
|Prefix||Example|| || |
|TON||TON S180||or "Tonantzintla S180"|| |