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Scope of this manual

This manual describes the design, operation and performance of the Utrecht Echelle Spectrograph (UES).

The manual starts with a quick reference section, Part ii, which contains summaries of command lists and useful numbers. This section is for people who are familiar with the instrument, but need to refresh their memories.

The manual then goes on to describe the UES observing system in more detail. This observing system can (somewhat arbitrarily) be divided into the following sub-systems:

• The telescope
• The derotation optics
• The A&G unit
• The spectrograph
• The detectors
• Data acquisition
• Data reduction

Parts iii, iv and v of this manual describe the design and general principles of operation of the three sub-systems listed above which are specific to UES: the spectrograph itself, the derotation optics and the A&G unit. The telescope and detector sub-systems are in common to all WHT instruments, and have their own user manuals.

Part vi describes the overall performance of the spectrograph.

Part vii describes in more detail how the observing system is set up and used for routine observing. Part viii describes diagnostic and setup procedures.

Part ix is a reference section specifying in detail the ICL commands used to operate the UES and its A&G. The commands for the other useful subsystems (telescope and detectors) are not listed here, further details can be found in the following manuals (copies of which can be obtained from Bill Martin at RGO--Cambridge): elsewhere:

• The La Palma-Isaac Newton Group-Observers Guide (1994)
• The WHT Users Manual (1994)
• The WHT Autoguider User Manual (1993)
• The WHT Data Acquistion System Manual (1993)
• The IPCS-II User Manual

Part x briefly describes the UES planning software whilst Part xi describes the software available for reducing UES data.

Part xi gives a brief summary of the STARLINK supported ECHOMOP package for the reduction of UES echelle data.