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 |
|---|
