Dominion Observatory 1420 MHz Source Catalog

In the 1960s, the Dominion Radio Astrophysical Observatory in British Columbia, Canada carried out a survey of the northern sky at 1420 MHz, producing a catalog of 615 radio sources, now referenced with the designator prefix DA. The instrument was the Dominion Radio Astrophysical Observatory 25.6m Telescope (aka 26-Meter Telescope, now called the John A. Galt Telescope).