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Advanced Camera for Surveys Instrument Handbook for Cycle 20 > Chapter 3: Introduction to ACS > 3.2 Instrument Capabilities

3.2
 
ACS is a versatile instrument with a broad range of scientific capabilities:
ACS was built with three channels, each optimized for a specific goal:
Wide Field Channel (WFC): 202 x 202 arcsecond field of view from ~3500  to 11,000 , and peak efficiency of 48% (including the Optical Telescope Assembly (OTA)). The plate scale of ~0.05 arcseconds/pixel provides critical sampling at 11,600 .
High Resolution Channel (HRC): 29 x 26 arcsecond field of view from ~1700  to 11,000 , and peak efficiency of 29%. The plate scale of ~0.027 arcseconds/pixel provided critical sampling at 6300 . HRC is no longer operational.
Solar Blind Channel (SBC): 34.6 x 30.5 arcsecond field of view from 1150  to 1700 , plate scale of ~0.032 arcseconds/pixel, and peak efficiency of 7.5%.
In addition to its primary capabilities listed above, ACS has also provided:
Grism spectroscopy: Low resolution (R ~100 @ 8000 ) wide field spectroscopy from 5500  to 10,500  with WFC (and HRC before January 2007).
Prism spectroscopy: low resolution (R ~100 @ 1500 ) far-UV spectroscopy from 1250  to 1800  with SBC (and low resolution (R = 59 @ 2500 ) near-UV spectroscopy from 1700  to 3900  with HRC before January 2007).
Imaging Polarimetry: polarimetric imaging with WFC (and HRC before January 2007) with relative polarization angles of 0, 60, and 120.
Coronagraphy (before January 2007): aberrated beam coronagraphy with HRC from 2000  to 11,000  with 1.8 arcsecond and 3.0 arcsecond diameter occulting spots.

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