Handling atmospheric dispersion and differential refraction effects in large-field multiobject spectroscopic observations

Jean Gabriel Cuby; D. Bottini; Jean Pierre Picat

doi:10.1117/12.316769

9 July 1998 Handling atmospheric dispersion and differential refraction effects in large-field multiobject spectroscopic observations

Jean Gabriel Cuby, D. Bottini, Jean Pierre Picat

Author Affiliations +

Proceedings Volume 3355, Optical Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.316769
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

The atmospheric refraction affects the position of objects in the sky in two ways: a chromatic effect and a field differential effect. The former is about the same in the field and can be, in principle, corrected using an Atmospheric Dispersion Compensator (ADC). The latter is dependent of the field size and cannot be corrected. For spectroscopy in wide fields, both effects have to be carefully considered because they affect the spectrophotometry in terms of signal to noise ratio and spectral distortions. The present study aims to evaluate the atmospheric effects in the case of the VIMOS instrument for the ESO VLT. It is shown that provided a careful operational mode the distortion of spectra can be kept at a level less than 15% with reasonable constraints.

Citation Download Citation

Jean Gabriel Cuby, D. Bottini, and Jean Pierre Picat "Handling atmospheric dispersion and differential refraction effects in large-field multiobject spectroscopic observations", Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); https://doi.org/10.1117/12.316769

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available