niri issues for 2007-2008
DESCRIPTION
NIRI Issues for 2007-2008. NIR web page OT Library Detector pattern noise PWFS Flexure Other Outstanding Tasks. NIR Webpage. www.gemini.edu/sciops/instruments/nir Baseline calibrations for all NIR instruments Photometric standard search new UKIRT standard star catalog - PowerPoint PPT PresentationTRANSCRIPT
NIRI Issues for 2007-2008
NIR web page
OT Library
Detector pattern noise
PWFS Flexure
Other Outstanding Tasks
NIR Webpage
www.gemini.edu/sciops/instruments/nir
Baseline calibrations for all NIR instruments
Photometric standard search
new UKIRT standard star catalog
Telluric standard searches
based on coordinates, magnitude & spectral type
provides standards before & after science
NIRI OT Library
Complete examples of all observing modes
Photometric standard stars
template observations of all UKIRT standards
include guide star & broad-band exposure times
Imaging & Spectroscopic flats & arcs
new exposure times & GCAL filter configurations
Detector Pattern Noise
8-pixel periodic pattern
Primarily affects longer exposure frames
nvnoise.cl (in GNIRS IRAF package)
reduces noise, but cannot remove all of the pattern
Not charging for affected frames
Resources allocated to work on this problem
PWFS Flexure
Flexure exists between PWFS & NIRI
~0.2''/hour, depending on slit orientation
Imposes ~10 min / hour re-centering overhead
Hope to measure & model flexure
Other Outstanding Tasks
Photometric zero-point monitoring
Implement IRAF detector linearity correction
Improve WCS
Others?