Systematic characterization of the Herschel SPIRE Fourier Transform Spectrometer

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dc.contributor.authorHopwood, R.
dc.contributor.authorPolehampton, E. T.
dc.contributor.authorValtchanov, I.
dc.contributor.authorSwinyard, B. M.
dc.contributor.authorFulton, T.
dc.contributor.authorLu, N.
dc.contributor.authorMarchili, N.
dc.contributor.authorvan der Wiel, M. H. D.
dc.contributor.authorBenielli, D.
dc.contributor.authorImhof, P.
dc.contributor.authorBaluteau, J.-P.
dc.contributor.authorPearson, C.
dc.contributor.authorClements, D. L.
dc.contributor.authorGriffin, M. J.
dc.contributor.authorLim, T. L.
dc.contributor.authorMakiwa, G.
dc.contributor.authorNaylor, David A.
dc.contributor.authorNoble, G.
dc.contributor.authorPuga, E.
dc.contributor.authorSpencer, Locke Dean
dc.date.accessioned2019-12-13T03:55:07Z
dc.date.available2019-12-13T03:55:07Z
dc.date.issued2015
dc.descriptionSherpa Romeo green journal. Permission to archive final published versionen_US
dc.description.abstractA systematic programme of calibration observations was carried out to monitor the performance of the Spectral and Photometric Imaging REceiver (SPIRE) Fourier Transform Spectrometer (FTS) instrument on board the Herschel Space Observatory. Observations of planets (including the prime point-source calibrator, Uranus), asteroids, line sources, dark sky and cross-calibration sources were made in order to monitor repeatability and sensitivity, and to improve FTS calibration. We present a complete analysis of the full set of calibration observations and use them to assess the performance of the FTS. Particular care is taken to understand and separate out the effect of pointing uncertainties, including the position of the internal beam steering mirror for sparse observations in the early part of the mission. The repeatability of spectral-line centre positions is <5kms−1, for lines with signal-to-noise ratios>40, corresponding to <0.5–2.0 percent of a resolution element. For spectral-lineflux,the repeatability is better than 6percent, which improves to 1–2percent for spectra corrected for pointing offsets. The continuum repeatability is 4.4percent for the SPIRE Long Wavelength spectrometer (SLW) band and 13.6percent for the SPIRE Short Wavelength spectrometer (SSW) band, which reduces to ∼1percent once the data have been corrected for pointing offsets. Observations of dark sky were used to assess the sensitivity and the systematic offset in the continuum, both of which were found to be consistent across the FTS-detector arrays. Theaveragepoint-sourcecalibratedsensitivityforthecentredetectorsis0.20and0.21Jy[1σ; 1h],forSLWandSSW.Theaveragecontinuumoffsetis0.40JyfortheSLWbandand0.28Jy for the SSW band.en_US
dc.description.peer-reviewYesen_US
dc.identifier.citationHopwood, R., Polehampton, E. T., Valtchanov, I., Swinyard, B. M., Fulton, T., Lu, N., ... Spencer, L. D. (2015). Systematic characterization of the Herschel SPIRE Fourier Transform Spectrometer. Monthly Notices of the Royal Astronomical Society, 449(3), 2274-2303. doi:10.1093/mnras/stv35en_US
dc.identifier.urihttps://hdl.handle.net/10133/5628
dc.language.isoen_USen_US
dc.publisherOxford University Pressen_US
dc.publisher.departmentDepartment of Physics and Astronomyen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionImperial College Londonen_US
dc.publisher.institutionRutherford Appleton Laboratoryen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.publisher.institutionHerschel Science Centreen_US
dc.publisher.institutionUniversity College Londonen_US
dc.publisher.institutionNASA Herschel Science Centreen_US
dc.publisher.institutionIAPS-INAFen_US
dc.publisher.institutionUniversity of Copenhagenen_US
dc.publisher.institutionUniversité d'Aix-Marseilleen_US
dc.publisher.institutionBlue Sky Spectroscopyen_US
dc.publisher.institutionThe Open Universityen_US
dc.publisher.institutionUniversity of Oxforden_US
dc.publisher.institutionCardiff Universityen_US
dc.publisher.institutionUniversity of British Columbiaen_US
dc.publisher.urlhttps://doi.org/10.1093/mnras/stv353en_US
dc.subjectInstrumentationen_US
dc.subjectSpectrographs - Methodsen_US
dc.subjectData analysis - Space vehiclesen_US
dc.subjectInstrumentsen_US
dc.subjectSPIRE
dc.subject.lcshFourier transform spectroscopy
dc.subject.lcshHerschel Space Observatory (Spacecraft)
dc.titleSystematic characterization of the Herschel SPIRE Fourier Transform Spectrometeren_US
dc.typeArticleen_US
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