Physics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007nimpa.572..521l&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section A, Volume 572, Issue 1, p. 521-525.
Physics
2
Spaceborne And Space Research Instruments, Apparatus, And Components, Astronomical And Space-Research Instrumentation, Charge-Coupled Devices, Image Detectors, And Ir Detector Arrays, Dark Energy
Scientific paper
The SNAP mission includes two surveys to study dark energy. In the deep survey, we detect more than 2000 matched Type Ia supernovae within a 7.5 deg2 field, with redshifts covering the range z=0.1 1.7. This uniform and high-quality set of “standard candles” will provide the most precise mapping of the expansion of the universe through the magnitude-redshift relation (Hubble diagram) ever constructed. The SNAP wide survey maps 1000 deg2/year in nine passbands to 28th magnitude. A weak-lensing study of the wide survey data traces the growth of structure and provides completely independent constraints on dark energy parameters. SNAP utilizes a 2 m class rigid light-weight telescope with a three-mirror anastigmatic design for a large, diffraction-limited field of view. The telescope feeds an instrumented ˜0.7 deg2 focal plane with ˜600 million pixels sensitive to wavelengths from 400 to 1700 nm. Full-depletion, high-purity silicon CCDs detect visible wavelengths, and 1700 nm cutoff HgCdTe detector arrays detect the near-IR. Passive cooling of the focal plane, fixed solar panels, fixed filters, and fixed antenna for telemetry simplify the mission. Room temperature operation of the telescope facilitates preflight testing. The satellite is placed in orbit about the second Earth Sun Lagrange point (L2).
No associations
LandOfFree
The research and development program for the SNAP dark energy experiment 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 The research and development program for the SNAP dark energy experiment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The research and development program for the SNAP dark energy experiment will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1839511