Echelle - Users Information
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This page last updated: Sept 27, 2007- GS
This page last checked: September 28, 2004 - JMD
Contents
Basic Information to Know...
Find the USER'S MANUAL here, from U-Chicago. (OLD)
Using the Echelle with TUI
Using the Echelle with Remark
Quick Start Guide
Exposure Times for Calibration Spectra
Things you need to know
Motion Control Documentation
Basic Information to Know...
You should retrieve your science images off from APO computers within 7 days after they are taken, otherwise they will be deleted. We DO NOT back up data locally here. Data can be found here.
Suggested Exposure Times For Calibration Spectra
Flats: Properly exposed flats over all echelle orders require a two-step process. Flats are taken both with and without a CuSO4 (aka "blue") filter in the beam. The "blue" flats are then combined in software with "red" flats in order to recover enough response in the blue orders for good overall flattening. Suggested exposures are 7 seconds ("red"; no filter) and 240 seconds ("blue", CuSO4 filter) yielding S/N values of ~480. The filter for "blue" flats is listed as "blue" in the Config window in Echelle control under Remark.
Th-Ar Comparisons: 30 seconds with the Th-Ar lamp on gives high (~150) S/N for most bright lines at the expense of some saturated lines in the reddest orders. Median combining 30 second Th-Ar exposures with those of shorter duration can be used to retrieve useful signal in these orders if they are crucial for good dispersion solutions in the far red. Shorter exposures alone will not result in enough signal for good global dispersion solutions.
Exposure times for objects can be derived from the following plot:
Things you need to know...
If you want to read out an image early with the Echelle using Remark press the STOP button.
If you need to just pause the image (due to clouds) without reading out, press the PAUSE button.
TOTAL THROUGHPUT (VERSUS WAVELENGTH)
http://astro.uchicago.edu/echelle/throughput.html
SAMPLE IMAGES
Flux (throughput) standard, the star HD84937
Comparison (Th-Ar) lamp
Solar spectrum
OPERATIONS MANUAL
Echelle User's Manual
User documentation
UC Data reduction guide I (not maintained by APO)
UC Data reduction guide II (PDF) (not maintained by APO)
An IRAF Script For Reducing Echelle Data
Specifications
Technical documents
Motor Control PC Commands
Slit Viewer: 10/04/02
Echelle User's Manual Link Here (Off-site link not maintained by APO!)
ITEMS NEEDING TO BE PUT ON THIS PAGE SOMEPLACE
ONLINE TECHNICAL DOCUMENTS DELIVERED - as of 5/13/99
(available via APO anonymous ftp: /export/home/ftp/pub/general/echelle
The Echelle home page is http://astro.uchicago.edu/echelle
USERS MANUAL Version 2 is on-line at http://astro.uchicago.edu/echelle
Online Table of Contents
Echelle Description
Tolerances
Calculation of dispersion
Table of Orders and Free Spectral Ranges
Image of CCD with Th-Ar spectrum
Th-Ar spectrum
Standard Star Spectrum (estimate counts at any wavelength)
How to Observe (instructions for all Remark Echelle Screens) - highlighting mistakes which are easy to make
How to Reduce Your Data - including IRAF scripts
Electronics:
block diagrams
text description of main electronics systems
Fiber Interface box - Computer
Enclosure
enclosure mechanical drawings
enclosure wiring
enclosure parts list
Fiber Interface Circuit board - computer
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
parts list
configuration document (jumper settings, etc)
Spares list
Fiber Interface box - Camera
Enclosure
enclosure mechanical drawings
enclosure wiring
enclosure parts list
Fiber Interface Circuit board - computer
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
parts list
configuration document (jumper settings, etc)
Spares list
Fiber Interface Power supply
enclosure mechanical drawings
enclosure wiring
enclosure parts list
Backplane board
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
parts list
Power Distribution board
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
parts list
Sig/Bias board
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
parts list
CCD Controller board (Motherboard)
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
CCD Power supply (a full spare will stay at Yerkes for at least one year)
enclosure mechanical drawings
enclosure wiring schematic
enclosure parts list
Spares list
CCD socket / CCD FPC
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
parts list
configuration document (jumper settings, etc.)
Ion Pump Monitor
Enclosure
enclosure mechanical drawings
enclosure wiring schematic
enclosure parts list
Monitor circuit board
schematic CAD files
schematic PDF files
PCB layout CAD files
PCB layout PDF files
parts list
Spares list
Misc. Docs
RS-232 fiber optic modems
Selected circuit board component documentation
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