echomop provides a set of tasks to expedite the reduction of échelle spectra data frames. The options available range from full-scale automated reduction to step-by-step, order-by-order manually-assisted processing. The tasks were written originally for the reduction of data from the University College London Echelle Spectrograph (UCLES); however, the algorithms are sufficiently flexible to permit reduction of spectra from a wide variety of sources.
Below is a brief summary of what can be done with echomop. It should help you to decide whether echomop can help you with your data reduction.
All echomop facilities can be accessed from a single task, ECHMENU, which guides you through a reduction.
There is an Introduction to Echelle Spectroscopy (SG/9) which is a good starting point for those new to échelle data reduction.
If you are new to echomop, you should refer to the demonstration described in the next sub-section and become familiar with the basic steps used to perform a reduction in Standard Steps. It is a good idea to read the Notes for Observers prior to observing.
More experienced users will want to refer to the detailed task and parameter information under Tasks and Parameters.
The remainder of this document contains the following information:
Using echomop describes the basic use of the main echomop task ECHMENU and the single-option tasks available from the shell.
Tasks & Options gives more detailed information on each task with lists of all the parameters used by each task.
Parameters describes all echomop parameters in full.
Automatic Reductions and Cloning briefly outline the important considerations for reducing multiple datasets automatically using a ‘template’ reduction performed manually.
The Tips section provides advice on handling particular types of data and specific processing techniques.
The sections on Input Data and Output Data describe echomop input and output data formats.
ECHARC describes the inter-operability of echomop with the fiGARO ECHARC program.
The Notes for Observers gives advice on how to go about preparing for an échelle observing run and what needs to be done with your data prior to using echomop for the spectral extraction.
The Hints are based on information in the on-line HELP text. Each sub-section describes the cause of an echomop problem and offers possible solutions.
The Release Notes are the change log for echomop. Information about the current release is included.
You can obtain an on-line introduction to the use of echomop, after you have setup echomop as described in section 2.1, by typing the command
where -graphics-device- is available for plotting the graphs during the reduction (e.g., xw). This
runs a demonstration reduction using a set of example data frames. It demonstrates the main
functions of echomop and follows a simple reduction from the start to the production of an extracted,
wavelength-calibrated spectrum. The text of the demonstration is also available for printing in the
file
for those who prefer to read from a paper copy whilst running the demo.