CaltechAUTHORS
Published July 2014 | Version Submitted
Journal Article Open

The effect of sideband ratio on line intensity for Herschel/HIFI

Creators

  • 1. ROR icon University of Cologne
  • 2. ROR icon European Space Astronomy Centre
  • 3. ROR icon California Institute of Technology
  • 4. ROR icon Laboratory of Astrophysics of Bordeaux
  • 5. ROR icon University of Groningen
  • 6. ROR icon Chalmers University of Technology
  • 7. ROR icon Jet Propulsion Lab

Abstract

The Heterodyne Instrument for the Far Infrared (HIFI) on board the Herschel Space Observatory is composed of a set of fourteen double sideband mixers. We discuss the general problem of the sideband ratio (SBR) determination and the impact of an imbalanced sideband ratio on the line calibration in double sideband heterodyne receivers. The HIFI SBR is determined from a combination of data taken during pre-launch gas cell tests and in-flight. The results and some of the calibration artefacts discovered in the gas cell test data are presented here along with some examples of how these effects appear in science data taken in orbit.

Additional Information

© 2014 Springer Science+Business Media Dordrecht. Received: 15 October 2013; Accepted: 26 March 2014; Published online: 18 May 2014. We would like to thank Mihkel Kama from the CHESS team for his help in investigating the sideband ratio effect around the 557 GHz water line. Ronan Higgins would like to thank Netty Honingh for useful discussions on the origins of the sideband ratio imbalance in bands 1 and 2. The authors are grateful to the anonymous referee for valuable comments.

Attached Files

Submitted - 1404.2806v1.pdf

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1404.2806v1.pdf

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Additional details

Identifiers

Eprint ID
49049
DOI
10.1007/s10686-014-9382-5
Resolver ID
CaltechAUTHORS:20140829-084139110

Related works

Describes
10.1007/s10686-014-9382-5 (DOI)
http://arxiv.org/abs/1404.2806 (URL)

Dates

Created
2014-08-29
Created from EPrint's datestamp field
Updated
2021-11-10
Created from EPrint's last_modified field