Palomar 48 Inch Telescope
(P48, Palomar 48, Samuel Oschin Telescope, Schmidt Oschin Telescope, Palomar 48-inch Schmidt)
(48 inch Schmidt telescope at Palomar Observatory)
The Palomar 48 Inch Telescope (Samuel Oschin Telescope)
is a 48 inch (1.2 meter) Schmidt camera at Palomar Observatory
in southern California.
It opened in 1948, nearly ten years after construction began,
part of this time due to delay by World War II.
It was built to carry out surveys,
constructed at the same time as the larger Hale Telescope.
It originally imaged photographic plates
but now uses a custom CCD camera that covers the
telescope's 47 square-degree field of view.
Its survey work has included the Palomar Observatory Sky Survey and
the Palomar-Quest Sky Survey
(aka Palomar-Quest Survey) of transients.
It is currently automated and used for the Zwicky Transient Facility.
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Palomar Observatory Sky Survey (POSS)
Palomar Transient Factory (PTF)