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HRC ○̉｜Definition｜1st｜20251021122004-00-⌔
HRC Instrument Information
The High Resolution Camera (HRC) is a microchannel plate (MCP) instrument with two detectors, the HRC-I optimized for imaging and the HRC-S for spectroscopy. The HRC-I has the largest field of view aboard Chandra. The HRC energy range (0.06-10 keV) extends below that of ACIS, (0.08-10 keV) but with less intrinsic spectral resolution (ΔE/E~1). The HRC-S is well-suited to serve as the readout for the Low Energy Transmission Grating (LETG). It can also be used in a very fast timing mode.
The instrument layout is shown to the right. At 30x30 arc min, the HRC-I FOV is the largest aboard Chandra, larger than the ACIS wide field imaging FOV of 16.9x16.9 arc min. The HRC-I aim point is situated in the middle of the detector for the best image quality. The HRC-S FOV is 6x99 arc min and the aim point is slightly offset to accomodate different wavelengths of the grating dispersed spectrum. For high-precision timing observations, only the center MCP segment is used to generate triggers, lowering the effective area to 6x30 arc min.
A complete description of HRC is given in the ** Proposers’ Observatory Guide**.
The table below summarizes the three most common HRC operating modes.
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Printed 2026-06-28.
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