Two-Dimensional Spectroscopy with the Cosmic Origins Spectrograph

Details Two-Dimensional Spectroscopy with the Cosmic Origins Spectrograph Two-Dimensional Spectroscopy with the Cosmic Origins Spectrograph

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21833112p&link_type=abstract

American Astronomical Society, AAS Meeting #218, #331.12; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The circular aperture of HSTs' Cosmic Origins Spectrograph (COS) is 2.5" in diameter, but transmission extends out to a 4" diameter. The NUV MAMA and the FUV microchannel plates image the sky over the full extent of the transmission. The cross-dispersion plate scale of the NUV channel is 0.02" and is 0.1" for the FUV channel. In this presentation we will discuss the capabilities and limitations of performing two-dimensional spectroscopy, in the cross-dispersion direction, with COS. In particular, we will discuss FUV detector effects, such as fixed pattern noise, gain sag, and Y walk, and the latest techniques for their correction.

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