Computer Science – Performance
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347515k&link_type=abstract
American Astronomical Society, AAS Meeting #213, #475.15; Bulletin of the American Astronomical Society, Vol. 41, p.437
Computer Science
Performance
1
Scientific paper
ACCESS is a rocket-borne payload with a ground-based calibration and performance monitoring program. It is designed to transfer the NIST absolute laboratory standards to the stars with a precision and calibration accuracy of 1% at a spectral resolving power greater than 500 across the 0.35-1.7 micron bandpass. This represents a significant improvement in the absolute and relative astrophysical flux calibration systems, especially at NIR wavelengths.
Several strategies will be employed to minimize calibration uncertainties. The standard star sample is comprised of stars with previous calibration heritage, minimal spectral features, and robust stellar atmosphere models. Observations will be conducted above the Earth's atmosphere to eliminate atmospheric
contamination of the stellar spectrum. To avoid calibration uncertainties between the visible and the NIR spectra, a single optical path and detector will be used. An a priori error budget will be established. Instrument performance will be tracked through the use of an on-board calibration monitor. Each standard star will be observed twice to establish repeatability. We will present the instrument design, observing and calibration strategies and error budget for ACCESS. Results of laboratory tests relevant to the design of the on-board calibration monitor will also be presented.
Establishing improved spectrophotometric standards is important for a broad range of missions and is relevant to many astrophysical problems. In particular, the precise calibration of the flux scale across the bandpass extending from 0.35 - 1.7 microns is fundamental to the precise determination of dark energy parameters based on SNeIa photometry.
Support for this work was provided by NASA through grant NNX08AI65G and DOE through grant DE-FG02-07ER41506.
Benford Dominic J.
Bohlin Ralph Charles
Dixon William V.
Duestua S. E.
Feldman Paul D.
No associations
LandOfFree
ACCESS - Absolute Color Calibration Experiment for Standard Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with ACCESS - Absolute Color Calibration Experiment for Standard Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ACCESS - Absolute Color Calibration Experiment for Standard Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1708646