A complex multi-notch astronomical filter to suppress the bright infrared sky
A long-standing and profound problem in astronomy is the difficulty in obtaining deep near-infrared observations due to the extreme brightness and variability of the night sky at these wavelengths. A solution to this problem is crucial if we are to obtain the deepest possible observations of the ear...
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| Veröffentlicht in: | Nature communications 2011-12, Vol.2 (1), p.581-581, Article 581 |
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| creator | Bland-Hawthorn, J. Ellis, S.C. Leon-Saval, S.G. Haynes, R. Roth, M.M. Löhmannsröben, H.-G. Horton, A.J. Cuby, J.-G. Birks, T.A. Lawrence, J.S. Gillingham, P. Ryder, S.D. Trinh, C. |
| description | A long-standing and profound problem in astronomy is the difficulty in obtaining deep near-infrared observations due to the extreme brightness and variability of the night sky at these wavelengths. A solution to this problem is crucial if we are to obtain the deepest possible observations of the early Universe, as redshifted starlight from distant galaxies appears at these wavelengths. The atmospheric emission between 1,000 and 1,800 nm arises almost entirely from a forest of extremely bright, very narrow hydroxyl emission lines that varies on timescales of minutes. The astronomical community has long envisaged the prospect of selectively removing these lines, while retaining high throughput between them. Here we demonstrate such a filter for the first time, presenting results from the first on-sky tests. Its use on current 8 m telescopes and future 30 m telescopes will open up many new research avenues in the years to come.
The night sky viewed from Earth is very bright at infrared wavelengths due to atmospheric emission, making land-based astronomy difficult in this spectral region. Here, a photonic filter is demonstrated to suppress this unwanted light, opening new paths to infrared astronomy with current and future telescopes. |
| doi_str_mv | 10.1038/ncomms1584 |
| format | Article |
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The night sky viewed from Earth is very bright at infrared wavelengths due to atmospheric emission, making land-based astronomy difficult in this spectral region. 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The night sky viewed from Earth is very bright at infrared wavelengths due to atmospheric emission, making land-based astronomy difficult in this spectral region. Here, a photonic filter is demonstrated to suppress this unwanted light, opening new paths to infrared astronomy with current and future telescopes.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>22146400</pmid><doi>10.1038/ncomms1584</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | 639/33/34 639/624/1075/1078 639/766/400 704/172/169/824 Astronomical Phenomena Astronomy - instrumentation Astronomy - methods Astrophysics Extraterrestrial Environment Galaxies Humanities and Social Sciences Infrared Rays multidisciplinary Optical Devices Photons Science Science (multidisciplinary) Sciences of the Universe Spectrum Analysis - instrumentation Spectrum Analysis - methods Telescopes |
| title | A complex multi-notch astronomical filter to suppress the bright infrared sky |
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