---

Up:UKIRT Instruments | Next: IRCAM3

The CGS4 manual documents sensitivities and resolutions and general information necessary to take data using CGS4. You can move back to this table of contents using the CGS4 icon at the top and bottom of each section.

Before using CGS4 you should have read the "Introduction to CGS4" and the documents in the online manual below  and become familiar with the contents of the documents discussing recommended exposure times, configs, execs and general observing procedures.

Check the "Current Status" document to find out which gratings are currently available in CGS4, news and planned changes. Please note that the configuration for semester 00B and the plan for semester 01A are available on this page.

Latest News:

With the delivery of MICHELLE anticipated in the near future, Tom Kerr will be handing over responsibility for CGS4 to Paul Hirst. In preparation for this, Paul should now be considered the first point of contact for enquiries about CGS4 and observing with this instrument. Tom is still happy to answer questions about CGS4, but MICHELLE preparatory work may preclude a timely response. When MICHELLE arrives at UKIRT, Paul will take over full responsibility for CGS4.

Contents:

1) Introduction

• Introduction to CGS4
• Optical layout
• Current status

2) How to prepare for your CGS4 run

•  Using UKIRT_PREP to prepare for CGS4 observing
•  Guide to CGS4 configs
•  Guide to CGS4 execs
•  Preparing for echelle observations

3) Operating CGS4

• Comprehensive instructions for running CGS4
•  Brief instructions on how to run CGS4
•  Using the subarrays
•  Peakup
•  CGS4 latency
•  Array test information
•  The CGS4/IRPOL manual
•  Changing between CGS4 and IRCAM

4) General observing information

•  CGS4 sensitivities, resolution, wavelength coverage and pixel scales
•  Optimum and background limited exposure times
•  Mauna Kea OH lines
•  A guide to slit position angles
•  Arc spectra and flat exposure times
•  40 and 150 l/mm grating efficiencies
•  CGS4 filters

5) Miscellaneous

•  CGS4 Data Types
•  Where to find CGS4 data files
•  Running CGS4 in engineering mode

6) Data reduction

•  The manual for portable CGS4 dr
•  Simple CGS4 reduction steps
•  Figaro cookbook for CGS4 data reduction
•  Correcting curvature in CGS4 spectra
•  Correcting sloping spectral lines
•  Reducing CGS4 data using IRAF
•  Reducing line emission CGS4 data using IRAF

Up:UKIRT Instruments | Next: IRCAM3

---

---