| タイトル | From Hubble's NGSL to Absolute Fluxes |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120011123 |
| 著者（英） | Heap, Sara R.; Lindler, Don |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2012-04-16 |
| 言語 | eng |
| 内容記述 | Hubble's Next Generation Spectral Library (NGSL) consists of R-l000 spectra of 374 stars of assorted temperature, gravity, and metallicity. Each spectrum covers the wavelength range, 0.18-1.00 microns. The library can be viewed and/or downloaded from the website, http://archive.stsci.edu/prepds/stisngsll. Stars in the NGSL are now being used as absolute flux standards at ground-based observatories. However, the uncertainty in the absolute flux is about 2%, which does not meet the requirements of dark-energy surveys. We are therefore developing an observing procedure that should yield fluxes with uncertainties less than 1 % and will take part in an HST proposal to observe up to 15 stars using this new procedure. |
| NASA分類 | Astronomy |
| レポートNO | GSFC.ABS.01027.2012 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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