J/A+A/613/A40ivo://CDS.VizieR/J/A+A/613/A40doi:10.26093/cds/vizier.36130040CDSKlaas U.Balog Z.Nielbock M.Mueller T.G.Linz H.Kiss Cs.2018-05-30T13:10:06Z2018-05-29T08:46:47ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frlate-type-starsgiant-starsinfrared-photometryspace-observatoriesobservational-astronomyOur aims are to determine flux densities and their photometric accuracy for a set of seventeen stars that range in flux from intermediately bright (<~2.5Jy) to faint (>~5mJy) in the far-infrared (FIR). We also aim to derive signal-to-noise dependence with flux and time, and compare the results with predictions from the Herschel exposure-time calculation tool. We obtain aperture photometry from Herschel-PACS high-pass-filtered scan maps and chop/nod observations of the faint stars. The issues of detection limits and sky confusion noise are addressed by comparison of the field-of-view at different wavelengths, by multi-aperture photometry, by special processing of the maps to preserve extended emission, and with the help of large-scale absolute sky brightness maps from AKARI. This photometry is compared with flux-density predictions based on photospheric models for these stars. We obtain a robust noise estimate by fitting the flux distribution per map pixel histogram for the area around the stars, scaling it for the applied aperture size and correcting for noise correlation.2018A&A...613A..40Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/613/A40CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/613/A40https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/613/A40http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/613/A40https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/613/A40https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/613/A40http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/613/A40GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/613/A40/stars (List of FIR faint stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/613/A40/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/613/A40/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/613/A40/stars?GETtext/xml+votable180.050000true31.79337523.46241670.0055555555555555566/737 6219 10192 11479 11547 11627 12130 15153 16023 16035 20529 21050 33351 33814 48330https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/613/A40?format=asciiInfrareddefaultJ/A+A/613/A40/tablea4PACS 100um scan map photometry of FIR faint starsNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOBSIDHerschel individual observation ID or combination of IDsmeta.id;obscharODHerschel Operational Daymeta.noteintgain[h/l] PACS bolometer gain setting h(igh)/l(ow)meta.codecharSpeedHerschel telescope scan speedarcsec/sphys.veloc;instr.telintRepNo. of scan map repetitionsmeta.numberintLengthParameter of scan map, scan leg lengtharcsecstat.param;obs.fieldintSepParameter of scan map, scan leg separationarcsecinstr.paramintNlegsParameter of scan map, number of scan legmeta.numberintSangleOrientation(s) of detector array wrt. scan directiondegpos.posAng;instr.detcharFaperFlux measured inside photometric aperturemJyphot.flux.density;em.IRfloatsigpix1 sigma noise per pixel (1)mJystat.errorfloate_Faper1 sigma noise for photometric aperture including correction for correlated noise (1)mJystat.errorfloatS/NSignal-to-noise ratio of flux measurement (1)stat.snr;phot.fluxcharFstarStellar flux (color corrected)mJyphot.flux.density;em.IRfloatWmaxMaximum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWminMinimum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWuncUncertainty of elliptical fit to PSFarcsecstat.errorfloatJ/A+A/613/A40/tableb2PACS 100um chop/nod photometry of FIR faint starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOBSIDHerschel individual observation IDmeta.id;obscharODHerschel Operational Day plus fractiontime.epochdoubleNameStar namemeta.id;meta.mainchargain[h/l] PACS bolometer gain setting: h(igh)/l(ow)meta.codecharDither[y/n] Chopper dither pattern: y(es)/n(o)meta.codecharRepNo. of chop/nod pattern repetitionsmeta.numberintFpeakFitted peak fluxmJyphot.flux.density;em.IRfloatFaperFlux measured inside photometric aperturemJyphot.flux.density;em.IRfloatsigpix1 sigma noise per pixelmJystat.errorfloate_Faper1 sigma noise for photometric aperture including correction for correlated noisemJystat.errorfloatS/NSignal-to-noise ratio of flux measurementstat.snr;phot.fluxcharFstarStellar flux (color corrected)mJyphot.flux.density;em.IRfloatWmaxMaximum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWminMinimum FWHM of elliptical fit to PSFarcsecphys.angSizefloatJ/A+A/613/A40/tableb3PACS 160um chop/nod photometry of FIR faint starsNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOBSIDHerschel individual observation IDmeta.id;obscharODHerschel Operational Day plus fractiontime.epochdoublegain[h/l] PACS bolometer gain setting: h(igh)/l(ow)meta.codecharDither[y/n] Chopper dither pattern: y(es)/n(o)meta.codecharRepNo. of chop/nod pattern repetitionsmeta.numberintFpeakFitted peak fluxmJyphot.flux.density;em.IRfloatFaperFlux measured inside photometric aperturemJyphot.flux.density;em.IRfloatsigpix1 sigma noise per pixelmJystat.errorfloate_Faper1 sigma noise for photometric aperture including correction for correlated noisemJystat.errorfloatS/NSignal-to-noise ratio of flux measurementstat.snr;phot.fluxcharFstarStellar flux (color corrected)mJyphot.flux.density;em.IRfloatWmaxMaximum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWminMinimum FWHM of elliptical fit to PSFarcsecphys.angSizefloatJ/A+A/613/A40/tablea5PACS 160um scan map photometry of FIR faint starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOBSIDHerschel individual observation ID or combination of IDsmeta.id;obscharODHerschel Operational Daymeta.noteintNameStar namemeta.id;meta.mainchargain[h/l] PACS bolometer gain setting h(igh)/l(ow)meta.codecharSpeedHerschel telescope scan speedarcsec/sphys.veloc;instr.telintRepNo. of scan map repetitionsmeta.numberintLengthParameter of scan map, scan leg lengtharcsecstat.param;obs.fieldintSepParameter of scan map, scan leg separationarcsecinstr.paramintNlegsParameter of scan map, number of scan legmeta.numberintSangleOrientation(s) of detector array wrt. scan directiondegpos.posAng;instr.detcharFaperFlux measured inside photometric aperturemJyphot.flux.density;em.IRfloatsigpix1 sigma noise per pixel (1)mJystat.errorfloate_Faper1 sigma noise for photometric aperture including correction for correlated noise (1)mJystat.errorfloatS/NSignal-to-noise ratio of flux measurement (1)stat.snr;phot.fluxcharFstarStellar flux (color corrected)mJyphot.flux.density;em.IRfloatWmaxMaximum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWminMinimum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWuncUncertainty of elliptical fit to PSFarcsecstat.errorfloatJ/A+A/613/A40/tableb1PACS 70um chop/nod photometry of FIR faint starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOBSIDHerschel individual observation IDmeta.id;obscharODHerschel Operational Day plus fractiontime.epochdoubleNameStar namemeta.id;meta.mainchargain[h/l] PACS bolometer gain setting: h(igh)/l(ow)meta.codecharDither[y/n] Chopper dither pattern: y(es)/n(o)meta.codecharRepNo. of chop/nod pattern repetitionsmeta.numberintFpeakFitted peak fluxmJyphot.flux.density;em.IRfloatFaperFlux measured inside photometric aperturemJyphot.flux.density;em.IRfloatsigpix1 sigma noise per pixelmJystat.errorfloate_Faper1 sigma noise for photometric aperture including correction for correlated noisemJystat.errorfloatS/NSignal-to-noise ratio of flux measurementstat.snr;phot.fluxcharFstarStellar flux (color corrected)mJyphot.flux.density;em.IRfloatWmaxMaximum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWminMinimum FWHM of elliptical fit to PSFarcsecphys.angSizefloatJ/A+A/613/A40/starsList of FIR faint starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainNameStar namemeta.id;meta.maincharObsDisplay the observationsmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/613/A40/tablea3PACS 70um scan map photometry of FIR faint starsNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOBSIDHerschel individual observation ID or combination of IDsmeta.id;obscharODHerschel Operational Daymeta.noteintgain[h/l] PACS bolometer gain setting h(igh)/l(ow)meta.codecharSpeedHerschel telescope scan speedarcsec/sphys.veloc;instr.telintRepNo. of scan map repetitionsmeta.numberintLengthParameter of scan map, scan leg lengtharcsecstat.param;obs.fieldintSepParameter of scan map, scan leg separationarcsecinstr.paramintNlegsParameter of scan map, number of scan legmeta.numberintSangleOrientation(s) of detector array wrt. scan directiondegpos.posAng;instr.detcharFaperFlux measured inside photometric aperturemJyphot.flux.density;em.IRfloatsigpix1 sigma noise per pixel (1)mJystat.errorfloate_Faper1 sigma noise for photometric aperture including correction for correlated noise (1)mJystat.errorfloatS/NSignal-to-noise ratio of flux measurement (1)stat.snr;phot.fluxcharFstarStellar flux (color corrected)mJyphot.flux.density;em.IRfloatWmaxMaximum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWminMinimum FWHM of elliptical fit to PSFarcsecphys.angSizefloatWuncUncertainty of elliptical fit to PSFarcsecstat.errorfloat