High Resolution Spectrograph

DevelopmentsLinks
Jan
2012
FIF probe alignment adjusted considerably for better throughput
Jul
2011
New "jiggling" method solves the "settling" delay problem, suppressing all drift after 1-2 min following a move
Jan
2011
Cross-disperser shows an exponentially decreasing "settling" drift for the first 5-7 min following a move
Oct
2008
K focus feature was added to allow for higher resolution modes near the Ca K line
Aug
2008
HRS cooling weakens, then restored
Apr
2008
Cross-disperser monitoring camera installed See April 29 Advisory
Mar
2008
Fine temperature control of spectrograph room began
Nov
2007
Iodine cell insertion malfunctions, then repaired
Oct
2007
HRS collimator folding flat replacement See Oct 11 Advisory
Oct
2007
New filters put in service. See Oct 10 Advisory
Jun
2006
HRS red ccd replaced
Aug
2005
New HRS new cooling system; CCD was taken apart, resulting in a few-pixel xy shift
Feb
2005
New HRS flat lamp installed, free of emission lines
Feb
2004
Memo from Gary Hill about guide star limits
Jan
2004
Position angle calculator for the HRS sky fibers provided
Jun
2003
Script hsplit.cl to split the FITS extensions and translate the headers into the splits became available; it also corrects the keyword CCDSEC so that CCDPROC works correctly
Jan
2002
Cross-disperser failed to move from 316g to 600g; new procedure for grating changes put in effect
Dec
2001
Misalignment of the slit unit was found to cause reduced fiber throughput for the left sky fiber; problem corrected
Dec
2001
A baffle in the optical path was missing; a new one was created and inserted




Last updated: Tue, 15 May 2012 00:32:35 -0500 caldwell



Overview

The Telescope

Technical Overview

Object Observability

Performance

Instruments

HRS

HRS Instrument Summary

HRS - Details

HRS Configurations

HRS Throughput

HRS Wavelength Calibration

MRS

MRS Instrument Summary

MRS Configurations

MRS Throughput

MRS Wavelength Calibration

LRS

LRS Instrument Summary

LRS Configurations

Multi-object Unit

LRS Throughput

LRS Spectral Resolution

LRS Wavelength Calibration

Visitor Filter Information

LRS Position Angles

Blind Offsetting

Guide Stars Limits

LRS Update from Gary Hill

Program Preparation

Web Management System

Other HET Documentation