[ ESO ] La Silla

EFOSC2 : ESO Faint Object Spectrograph and Camera

EFOSC2 relocation at the NTT as of Period 81!
(and ETC updated already)

[ Efosc On Telescope]EFOSC2, or the ESO Faint Object Spectrograph and Camera (v.2) to give its full name, is a very versatile instrument for low resolution spectroscopy and imaging. The instrument has multi mode capability including normal/polarimetric imaging/spectroscopy (several submodes in each), Multiobject spectroscopy and coronography. One can easily switch between most modes, even during a single night with little loss of observing time; this flexibility and the ease of operation make for a very efficient instrument capable of handling most observing programmes in an efficient manner.
Despite its multi mode capability the real forte of EFOSC2 is low resolution spectroscopy - it is a very efficient instrument in terms of both photons and time. A second feature of this instrument is the sensitivity of its CCD to UV photons. 
*EFOSC History
Instrument Overview
The EFOSC2 Gallery
* A new polarization unit will be offered in P79; it will allow to measure circular polarimetry, thanks to a quarter-lambda retarder plate (14/08/2006)
* EFOSC2 calibration plan now on-line (10/05/2006)
* A short manual of the quick-look tool for long-slit spectroscopy is now available (27/04/2006)
* Polarization: Preliminary analysis of instrument polarization shows < 0.1% at field center, and ca. 0.4% at the edge. (07/07/2005)
* New Webpage: A new webpage has been created to give a short overview on the instrument: Instrument Overview. (11/02/2005)
* New Grisms: All broken grisms have been either repaired or replaced, the last being grism #15 replaced by #17. The new efficiencies and further info can be found at the EFOSC grisms page. (19/11/2004)
* Fringing pattern determined: The fringing patterns for the filter i#705 has been determined and put on this page. (17/11/2004)
* Zero-Point monitoring page updated: The zero-points are measured in each photometric night when EFOSC is mounted. The results are stored in the EFOSC ZP-page. (13/11/2004)
* New Grism Efficiencies: System efficiencies have been measured for all available grisms. For details, see EFOSC grims page. (31/08/2004)
* Pattern in Bias Frames: A pattern of probable electronic nature is sporadically observed in Bias frames taken with binning 2x2. For details, see Pattern in Bias 2x2. (22/02/2007)
* Grism #10 decommissioned: Grism #10 (6280-8200 Å) suffered a major damage and is no longer offered. (14/06/2007)
Please mail to ls-efosc for comments, suggestions and to report errors and inaccurate statements in the web pages and manuals.

Instrument Features
Instrument Layout
Imaging filters
Star Plates
Polarimetric elements
Miscellaneous elements/Issues
Instrument Performance
CCD #40
Grism throughput
Helium-Argon lamp
Image Quality
Fringing Pattern
Bad Pixel Mask
Monitoring of photometric zero-points
Telescope Features
Basic Parameters
Pointing limits
Pointing accuracy
Tracking and guiding
Telescope Focus
Weather Condition Limits
Image quality

Portrait of an Observing Run
Before Arrival
Preparing for Observations
Observations and After
Observing modes
Miscellanea (Science OB,Standard Stars,Time Overheads)
Multi-Object Spectroscopy (MOS)
JP2PP Templates quick reference
Observing Tools
Exposure time calculator
ESO User Support Services and Tools (Standard Star Catalogues, Software support)
EFOSC2 Instrument Package
EFOSC2 Observing Log Sheet
EFOSC2 Setup Form
Adaptor Angle Calculator
Quick look tool for long-slit spectroscopy
Support Astronomer only
Setup night checklist
Zero-point monitoring procedure
Instrument tests
FAQ for Support Astronomer

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