J/MNRAS/453/1136ivo://CDS.VizieR/J/MNRAS/453/1136doi:10.26093/cds/vizier.74531136CDSJimenez-Teja Y.Benitez N.Molino A.Fernandes C.A.C.2024-08-15T20:14:59Z2016-05-24T09:12:05ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsphotometryredshiftedPhotometric redshifts, which have become the cornerstone of several of the largest astronomical surveys like PanStarrs, DES, J-PAS and LSST, require precise measurements of galaxy photometry in different bands using a consistent physical aperture. This is not trivial, due to the variation in the shape and width of the point spread function (PSF) introduced by wavelength differences, instrument positions and atmospheric conditions. Current methods to correct for this effect rely on a detailed knowledge of PSF characteristics as a function of the survey coordinates, which can be difficult due to the relative paucity of stars tracking the PSF behaviour. Here we show that it is possible to measure accurate, consistent multicolour photometry without knowing the shape of the PSF. The Chebyshev-Fourier functions (CHEFs) can fit the observed profile of each object and produce high signal-to-noise integrated flux measurements unaffected by the PSF. These total fluxes, which encompass all the galaxy populations, are much more useful for galaxy evolution studies than aperture photometry. We compare the total magnitudes and colours obtained using our software to traditional photometry with SExtractor, using real data from the COSMOS survey and the Hubble Ultra-Deep Field (HUDF). We also apply the CHEF technique to the recently published eXtreme Deep Field (XDF) and compare the results to those from ColorPro on the HUDF. We produce a photometric catalogue with 35732 sources (10823 with signal-to-noise ratio >=5), reaching a photometric redshift precision of 2 per cent due to the extraordinary depth and wavelength coverage of the eXtreme Deep Field images.2015MNRAS.453.1136Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/453/1136CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/453/1136https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/453/1136http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/453/1136https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/453/1136https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/453/1136http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/453/1136GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/453/1136/table2 (CHEF photometric catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/453/1136/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/453/1136/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/453/1136/table2?GETtext/xml+votable180.050000true53.16416806-27.829811940.0055555555555555566/359351.0590977079788917e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/453/1136?format=asciiOpticaldefaultJ/MNRAS/453/1136/table2CHEF photometric cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSExtractor identification numbermeta.id;meta.mainintRAJ2000Right ascension of barycenter (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination of barycenter (J2000)degpos.eq.dec;meta.mainindexedF105W? Total magnitude for F105W filtermagphot.mag;em.IR.Jdoublenullablee_F105W? Error in F105Wmagstat.errordoublenullableF125W? Total magnitude for F125W filtermagphot.mag;em.IR.Jdoublenullablee_F125W? Error in F125Wmagstat.errordoublenullableF140W? Total magnitude for F140W filtermagphot.mag;em.IR.Hdoublenullablee_F140W? Error in F140Wmagstat.errordoublenullableF160W? Total magnitude for F160W filtermagphot.mag;em.IR.Hdoublenullablee_F160W? Error in F160Wmagstat.errordoublenullableF435W? Total magnitude for F435W filtermagphot.mag;em.opt.Bdoublenullablee_F435W? Error in F435Wmagstat.errordoublenullableF606W? Total magnitude for F606W filtermagphot.mag;em.opt.Rdoublenullablee_F606W? Error in F606Wmagstat.errordoublenullablen_e_F606W[i] i for infinitymeta.notecharF775W? Total magnitude for F775W filtermagphot.mag;em.opt.Idoublenullablee_F775W? Error in F775Wmagstat.errordoublenullablen_e_F775W[i] i for infinitymeta.notecharF814W? Total magnitude for F814W filtermagphot.mag;em.opt.Idoublenullablee_F814W? Error in F814Wmagstat.errordoublenullableF850LP? Total magnitude for F850LP filtermagphot.mag;em.opt.Idoublenullablee_F850LP? Error in F850LPmagstat.errordoublenullablezb[0/7] Best BPZ photometric redshift estimationsrc.redshift.photdoublezbmin[0/7] Lower limit for 1sigma confidence intervalsrc.redshift.photdoublezbmax[0/7] Upper limit for 1sigma confidence intervalsrc.redshift.photdoubletb[1/11] Best BPZ spectral type estimationsrc.spTypedoubleOdds[0/1] Photometric redshift reliabilitymeta.code.qual;src.redshift.photdoubleChi2Goodness of the BPZ fitstat.fit.chi2double