How to use Arcsec in a sentence
For uniform surface brightness sources, an aperture with an area of 1 square arcsec is used.
The filter wheel includes a 4x magnifier that results in 0.12 arcsec pixels for near diffraction limited imaging.
However, with a count rate of counts s -1 arcsec -2 the dark count rate of the detector is generally negligible.
An example would be a delivered image quality of 0.45 arcsec when 0.3 arcsec was requested.
The specification for the former can be estimated using the 0.25 arcsec slit width.Advertisement
The slit widths are given in arcsec projected on the sky.