HST FLUX CALIBRATION: I. STIS AND CALSPEC
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http://archive.stsci.edu/doi/resolve/resolve.html?doi=10.17909/t9-3c82-x328
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资源简介：
The precision of absolute flux measurements is quantified for the Space Telescope Imaging Spectrograph (STIS), which is the most important contributor to the CALSPEC standards. With our goal of 1% absolute accuracy, the documentation of the HST/CALSPEC flux scale and its sub-percent repeatability are of prime importance. While the 1σ rms broadband repeatability for G140L is 0.7%, the other four STIS spectral modes show excellent photometric repeatability of 1σ=0.2%. The cus- tom data processing that is required to achieve these results is discussed in detail. In particular, the correction for the wide extraction heights required for the saturated Vega and Sirius data is found to vary with time, which results in revised spectral energy distributions (SEDs) that decrease by as much as 2.5% for Sirius and 2% for Vega at 1 μm.
提供机构：
STScI/MAST
创建时间：
2019-09-20
