Astrophysics (Index)About

Palomar Four-filter Survey

(Hale telescope survey aimed at discovering high-redshift quasars)

I use the term Palomar Four-filter Survey for an astronomical survey of about 1990 carried out with the Four-shooter spectrograph/camera on the Hale Telescope, aimed at discovering high-redshift quasars. Photographs were taken with four custom filters designed to catch redshifted H-alpha emission lines with a P Cygni profile (an odd shape, characteristic of the star P Cygni, but expected to be visible in some quasars) and the designator "PC" might be taken from this.

Further reading:
PCPC 1247+3406