CFHQSIR surveyJ/A+A/616/A55ivo://CDS.VizieR/J/A+A/616/A55doi:10.26093/cds/vizier.36160055CDSPipien S.Basa S.Cuby J.-G.Cuillandre J.-C.,Willott C.Moutard T.Chatron J.Arnouts S.Hudelot P.2018-08-24T07:36:56Z2018-08-20T08:12:13ZCDS support teamCDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, Francecds-question@unistra.frgalaxiescatalogsphotometryvisible-astronomysloan-photometryThe Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) has been conducted over a five-year period at the CFHT with the MegaCam instrument, totaling 450 nights of observations. The Wide Synoptic Survey is one component of the CFHTLS, covering 155 square degrees in four patches of 23 to 65 square degrees through the whole MegaCam filter set (u*, g', r', i', z') down to i'_{AB} = 24.5. With the motivation of searching for high-redshift quasars at redshifts above 6.5, we extend the multi-wavelength CFHTLS-Wide data in the Y-band down to magnitudes of {sim} 22.5 for point sources (5{sigma}). We observed the four CFHTLS-Wide fields (except one quarter of the W3 field) in the Y-band with the WIRCam instrument (Wide-field InfraRed Camera) at the CFHT. Each field was visited twice, at least three weeks apart. Each visit consisted of two dithered exposures. The images are reduced with the Elixir software used for the CFHTLS and modified to account for the properties of near-InfraRed (IR) data. Two series of image stacks are subsequently produced: four-image stacks for each WIRCam pointing, and one-square- degree tiles matched to the format of the CFHTLS data release. Photometric calibration is performed on stars by fitting stellar spectra to their CFHTLS photometric data and extrapolating their Y-band magnitudes. After corrections accounting for correlated noise, we measure a limiting magnitude of Y_{AB}~=22.4 for point sources (5{sigma}) in an aperture diameter of 0.93 arcsecs, over 130 square degrees. We produce a multi-wavelength catalogue combining the CFHTLS-Wide optical data with our CFHQSIR (Canada-France High-z quasar survey in the near-InfraRed) Y-band data. We derive the Y-band number counts and compare them to the Vista Deep Extragalactic Observations survey (VIDEO). We find that the addition of the CFHQSIR Y-band data to the CFHTLS optical data increases the accuracy of photometric redshifts and reduces the outlier rate from 13.8% to 8.8% in the redshift range 1.05<~z<~1.2. The images and the catalogue for 8.6 million sources down to [(z'>=23.5) {lor} (Y>=23.0)] are released and available at the following URL: http://apps.canfar.net/storage/list/cjw/cfhqsir2018A&A...616A..55Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/616/A55CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/317 : The CFHTLS Survey (T0007 release) (Hudelot+ 2012)hpps.canfar.net/storage/list/cjw/cfhqsir : CANFAR home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/616/A55https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/616/A55http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/616/A55https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/616/A55https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/616/A55http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/616/A55GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/616/A55/cfhqsir (CFHQSIR catalogue (W1, W2, W3 and W4 fields))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/616/A55/cfhqsir?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/616/A55/cfhqsir?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/616/A55/cfhqsir?GETtext/xml+votable180.050000true31.21387389-4.662253890.0055555555555555564/1104 1191 2298 2559 5/2850-2851 2854 2857-2862 2944-2945 4372-4373 4375 4420-4422 4424-4425 4758-4759 5460 9151 9198 10230 10233 10235 6/10751 11093 11395 11398-11399 11410 11422-11425 11427 11452 11488 11785 11788 11792 17496-17497 17499 17524-17525 17527 17692-17694 17704-17705 17707-17710 17712-17714 17728 17730 19021 19023 19025-19028 19030-19031 19047 19053 19153 19156-19158 19208 19210 19232 19240 19242 21829 21844 27298 27304 36599 36603 36747 36750-36751 36784 36786-36787 36796 36798-36799 40909-40911 40914 40926 40929 40931 40937https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/616/A55?format=asciiOpticaldefault
J/A+A/616/A55/cfhqsirCFHQSIR catalogue (W1, W2, W3 and W4 fields)e_rmag? rms uncertainty on rmag (err_rmag)magstat.error;phot.mag;em.opt.RdoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTileCFHTLS T0007 tile (tile) (5)meta.idcharindexedRAJ2000Right ascension (J2000.0) (RAJ2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000.0) (DECJ2000)degpos.eq.dec;meta.mainindexedumag? CFHTLS u total magnitude (AB) (TOTAL= ISO + delta_mag) (umag) (1)magphot.mag;em.opt.Udoublenullablee_umag? rms uncertainty on umag (err_umag)magstat.error;phot.mag;em.opt.Udoublenullablegmag? CFHTLS g total magnitude (AB) (TOTAL= ISO + delta_mag) (gmag) (1)magphot.mag;em.opt.Bdoublenullablee_gmag? rms uncertainty on gmag (err_gmag)magstat.error;phot.mag;em.opt.Bdoublenullablermag? CFHTLS r total magnitude (AB) (TOTAL= ISO + delta_mag) (rmag) (1)magphot.mag;em.opt.Rdoublenullableimag? CFHTLS i total magnitude (AB) (TOTAL= ISO + delta_mag) (imag) (1)magphot.mag;em.opt.Idoublenullablee_imag? rms uncertainty on imag (err_imag)magstat.error;phot.mag;em.opt.Idoublenullableymag? CFHTLS y total magnitude (AB) (TOTAL= ISO + delta_mag) (zmag) (1) (6)magphot.mag;em.IR.Jdoublenullablee_ymag? rms uncertainty on zmag (err_zmag)magstat.error;phot.mag;em.opt.Vdoublenullablezmag? CFHTLS y total magnitude (AB) (TOTAL= ISO + delta_mag) (zmag) (1)magphot.mag;em.opt.Idoublenullablee_zmag? rms uncertainty on zmag (err_zmag)magstat.error;phot.mag;em.opt.IdoublenullableYWmag? WIRCam Y total magnitude (AB) (TOTAL= ISO + delta_mag) (Ywirmag) (2)magphot.mag;em.IR.Jdoublenullablee_YWmag? rms uncertainty on Ywirmag (err_Ywirmag)magstat.error;phot.magdoublenullabledeltamagWeighted mean rescaling factor (from ISO to AUTO) (delta_mag)magarith.factor;phot.mag;stat.meandoubleumagISO? CFHTLS u isophotal magnitude (AB) (MAG_ISO_u) (1)magphot.mag;em.opt.Udoublenullablee_umagISO? rms uncertainty on MAG_ISO_u (MAGERR_ISO_u)magstat.error;pos.cartesian.xdoublenullablegmagISO? CFHTLS g isophotal magnitude (AB) (MAG_ISO_g) (1)magphot.mag;em.opt.Bdoublenullablee_gmagISO? rms uncertainty on MAG_ISO_g (MAGERR_ISO_g)magstat.errordoublenullablermagISO? CFHTLS r isophotal magnitude (AB) (MAG_ISO_r) (1)magphot.mag;em.opt.Rdoublenullablee_rmagISO? rms uncertainty on MAG_ISO_r (MAGERR_ISO_r)magstat.errordoublenullableimagISO? CFHTLS i isophotal magnitude (AB) (MAG_ISO_i) (1)magphot.mag;em.opt.Idoublenullablee_imagISO? rms uncertainty on MAG_ISO_i (MAGERR_ISO_i)magstat.errordoublenullableymagISO? CFHTLS y isophotal magnitude (AB) (MAG_ISO_y) (1) (6)magphot.mag;em.IR.Jdoublenullablee_ymagISO? rms uncertainty on MAG_ISO_y (MAGERR_ISO_y)magstat.error;pos.cartesian.ydoublenullablezmagISO? CFHTLS z isophotal magnitude (AB) (MAG_ISO_z) (1)magphot.mag;em.opt.Idoublenullablee_zmagISO? rms uncertainty on MAG_ISO_z (AB) (MAGERR_ISO_z)magstat.errordoublenullableumagAUTO? CFHTLS u Kron-like elliptical aperture magnitude (AB) (MAG_AUTO_u) (1)magphot.mag;em.opt.Udoublenullablee_umagAUTO? rms uncertainty on MAG_AUTO_u (MAGERR_AUTO_u)magstat.error;pos.cartesian.xdoublenullablegmagAUTO? CFHTLS g Kron-like elliptical aperture magnitude (AB) (MAG_AUTO_g) (1)magphot.mag;em.opt.Bdoublenullablee_gmagAUTO? rms uncertainty on MAG_AUTO_g (MAGERR_AUTO_g)magstat.errordoublenullablermagAUTO? CFHTLS r Kron-like elliptical aperture magnitude (AB) (MAG_AUTO_r) (1)magphot.mag;em.opt.Rdoublenullablee_rmagAUTO? rms uncertainty on MAG_AUTO_r (MAGERR_AUTO_r)magstat.errordoublenullableimagAUTO? CFHTLS i Kron-like elliptical aperture magnitude (AB) (MAG_AUTO_i) (1)magphot.mag;em.opt.Idoublenullablee_imagAUTO? rms uncertainty on MAG_AUTO_i (MAGERR_AUTO_i)magstat.errordoublenullableymagAUTO? CFHTLS y Kron-like elliptical aperture magnitude (AB) (MAG_AUTO_y) (1)magphot.mag;em.IR.Jdoublenullablee_ymagAUTO? rms uncertainty on MAG_AUTO_y (MAGERR_AUTO_y) (6)magstat.error;pos.cartesian.ydoublenullablezmagAUTO? CFHTLS z Kron-like elliptical aperture magnitude (AB) (MAG_AUTO_z) (1)magphot.mag;em.opt.Idoublenullablee_zmagAUTO? rms uncertainty on MAG_AUTO_z (MAGERR_AUTO_z)magstat.errordoublenullableumagAPER? CFHTLS u circular aperture magnitude (AB) (MAG_APER_u) (1) (3)magphot.mag;em.opt.Udoublenullablee_umagAPER? rms uncertainty on MAG_APER_u (MAGERR_APER_u)magstat.error;pos.cartesian.xdoublenullablegmagAPER? CFHTLS g circular aperture magnitude (AB) (MAG_APER_g) (1) (3)magphot.mag;em.opt.Bdoublenullablee_gmagAPER? rms uncertainty on MAG_APER_g (MAGERR_APER_g)magstat.errordoublenullablermagAPER? CFHTLS r circular aperture magnitude (AB) (MAG_APER_r) (1) (3)magphot.mag;em.opt.Rdoublenullablee_rmagAPER? rms uncertainty on MAG_APER_r (MAGERR_APER_r)magstat.errordoublenullableimagAPER? CFHTLS i circular aperture magnitude (AB) (MAG_APER_i) (1) (3)magphot.mag;em.opt.Idoublenullablee_imagAPER? rms uncertainty on MAG_APER_i (MAGERR_APER_i)magstat.errordoublenullableymagAPER? CFHTLS y circular aperture magnitude (AB) (MAG_APER_y) (1) (3)magphot.mag;em.IR.Jdoublenullablee_ymagAPER? rms uncertainty on MAG_APER_y (MAGERR_APER_y)magstat.error;pos.cartesian.ydoublenullablezmagAPER? CFHTLS z circular aperture magnitude (AB) (MAG_APER_z) (1) (3)magphot.mag;em.opt.Idoublenullablee_zmagAPER? rms uncertainty on MAG_APER_z (MAGERR_APER_z)magstat.errordoublenullableE(B-V)CFHTLS E(B-V) extinction (EB_V) (4)magphot.color.excessfloatYWmagISO? WIRCam Y isophotal magnitude (AB) (MAG_ISO_Ywir) (2)magphot.mag;em.IR.Jdoublenullablee_YWmagISO? rms uncertainty on MAG_APER_z (MAGERR_ISO_Ywir)magstat.errordoublenullableYWmagAPER? WIRCam Y isophotal magnitude (AB) (MAG_APER_Ywir) (2)magphot.mag;em.IR.Jdoublenullablee_YWmagAPER? WIRCam Y circular aperture magnitude (MAGERR_APER_Ywir)magstat.errordoublenullableYWmagAUTO? WIRCam Y Kron-like elliptical aperture magnitude (AB) (MAG_AUTO_Ywir) (2)magphot.mag;em.IR.Jdoublenullablee_YWmagAUTO? rms uncertainty on MAG_AUTO_Ywir (MAGERR_AUTO_Ywir)magstat.errordoublenullableAreaYIsophotal area above analysis threshold (ISOAREA_IMAGE_Ywir) (2)pixel**2instr.sensitivityintAreaFYIsophotal area (filtered) above analysis threshold (ISOAREAF_IMAGE_Ywir) (2)pixel**2instr.sensitivityintXposObject position along the x-axis (X_IMAGE_Ywir) (2)pixpos.cartesian.x;instr.detdoubleYposObject position along the y-axis (Y_IMAGE_Ywir) (2)pixpos.cartesian.y;instr.detdoubleAaxisYProfile RMS along major axis (A_WORLD_Ywir) (2)degstat.stdevdoubleBaxisY? Profile RMS along minor axis (B_WORLD_Ywir) (2)degstat.stdevdoublenullablethetaYPosition angle (THETA_WORLD_Ywir) (2)degpos.posAngfloatmuMaxYPeak Surface brightness above background (MU_MAX_Ywir)mag.arcsec**-2phot.mag.sbfloatFlagsYExtraction flags (FLAGS_Ywir)meta.code.errorintFWHMImgYFWHM assuming a gaussian core (FWHM_IMAGE_Ywir) (2)pixphys.angSizefloatClassStarYStar/Galaxy classifier output (CLASS_STAR_Ywir) (2) (7)src.class.starGalaxyfloat