Research

A complex multi-notch astronomical filter to suppress the bright infrared sky


Reference:

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. and Trinh, C., 2011. A complex multi-notch astronomical filter to suppress the bright infrared sky. Nature Communications, 2, 581.

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    Official URL:

    http://dx.doi.org/10.1038/ncomms1584

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    Abstract

    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.

    Details

    Item Type Articles
    CreatorsBland-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. and Trinh, C.
    DOI10.1038/ncomms1584
    Related URLs
    URLURL Type
    http://arxiv.org/abs/1112.1694v1Free Full-text
    DepartmentsFaculty of Science > Physics
    RefereedYes
    StatusPublished
    ID Code28265

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