Attaining the Photometric Precision Required by Future Dark Energy Projects

Stubbs, Christopher

DOI  :  10.2172/1115429
RP-ID  :  DOE-Harvard-41569-3
PID  :  OSTI ID: 1115429

学科分类：天文学(综合)

美国|英语

来源: SciTech Connect

【 摘 要 】

This report outlines our progress towards achieving the high-precision astronomical measurements needed to derive improved constraints on the nature of the Dark Energy. Our approach to obtaining higher precision flux measurements has two basic components: 1) determination of the optical transmission of the atmosphere, and 2) mapping out the instrumental photon sensitivity function vs. wavelength, calibrated by referencing the measurements to the known sensitivity curve of a high precision silicon photodiode, and 3) using the self-consistency of the spectrum of stars to achieve precise color calibrations.