J/PAZh/42/313ivo://CDS.VizieR/J/PAZh/42/313CDSKhorunzhev G.A.Burenin R.A.Mescheryakov A.V.Sazonov S.Yu.2018-09-03T10:29:12Z2016-05-23T14:26:34ZCDS support team

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

cds-question@unistra.frx-ray-sourcesquasarsredshiftedvisible-astronomysloan-photometryA catalog of quasar candidates at redshifts 3<z<5.5 is presented. These candidates have been selected among X-ray sources in the XMM-Newton Serendipitous Source Catalog (3XMM-DR4) in the 0.5-2keV band, located at high galactic latitudes |b|>20deg in the Sloan Digital Sky Survey (SDSS) area. The total overlapping area is about 300 sq. deg. The SDSS, 2MASS and WISE photometric catalogs were used. Only SDSS point sources were considered. X-ray sources having an optical counterpart with magnitude error in SDSS z band of less than 0.2 and color i-z<0.6 were chosen. Their photometric redshifts were determined with the EAZY code using a library of spectral templates. A sample of quasar candidates with photometric redshifts in the range 2.75<z<5.5 has been composed. Objects whose spectral energy distributions are better described by stellar templates have been excluded. The selection completeness of known quasars is about 80%. The normalized median absolute deviation of the differences between the photometric and spectroscopic redshifts of known quasars is 0.07 (with 9% outliers). The sky density of quasar candidates in our sample is 1.5 times that of the spectroscopic SDSS sample in the same fields. Follow-up spectroscopy should clarify the purity of the sample.2016PAZh...42..313Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PAZh/42/313CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/44 : XMM-Newton Serend. Source Catalogue 3XMM-DR4 (XMM-SSC, 2013)IX/46 : XMM-Newton Serend. Source Catalogue 3XMM-DR5 (XMM-SSC, 2016)VII/273 : The Half Million Quasars (HMQ) catalogue (Flesch, 2015)J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000{AA} (Pickles 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PAZh/42/313https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PAZh/42/313http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PAZh/42/313https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PAZh/42/313https://vizier.iucaa.in/viz-bin/votable?-source=J/PAZh/42/313http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PAZh/42/313GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PAZh/42/313/table1 (Catalog of 3<z<5.5 quasar candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PAZh/42/313/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/PAZh/42/313/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PAZh/42/313/table1?GETtext/xml+votable180.050000true0.8981-6.18690.005555555555555556Cone search capability for table J/PAZh/42/313/table2 (List of known quasars at z>3 not selected by our algorithm)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PAZh/42/313/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/PAZh/42/313/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PAZh/42/313/table2?GETtext/xml+votable180.050000true2.704629.02770.0055555555555555565/4419 4421 4422 6814 6/50 295 596 597 615 619 920 2134 2164 2221 2227 2230 2248 2251 2561 2622 2623 2658 2704 2708 2709 4118 4146 4163 4227 4285 4325 4345 4347 4369 4391 4409 4412 4439 4450 4469 4488 4513 4515 4536 4540 4567 4653 4689 4697 4748 4831 4834 4835 4838 4859 4862 4865 4870 4921 4924 4946 4964 4965 4967 5033 5091 5118 5128 5130 5183 5241 5246 5305 5333 5363 5367 5429 5437 5471 5506 5523 5536 5538 5569 5570 5587 5610 5616 5629 5630 5668 5670 5671 5689 5699 5701 5731 5762 5795 5805 5817 5820 5839 5860 5864 5870 5935 5937 5939 5945 5952 5975 5984 6018 6020 6021 6047 6051 6059 6062 6069 6071 6075 6077 6090 6112 6196 6241 6252 6337 6382 6431 6440 6472 6494 6534 6544 6552 6579 6617 6645 7159 7178 7184 7211 7235 7259 7273 7298 7301 7308 7309 7361 7363 7374 7409 7416 7424 7426 7441 7448 7456 7485 7522 7552 7604 7606 7612 7829 8195 8196 8212 8245 8266 8288 8299 8315 8324 8339 8442 8520 8526 8626 8644 8656 8675 8707 8843 8845 8906 8912 8927 8947 8952 9077 9121 9149 9168 9181 9242 9253 9272 9332 9333 9343 9346 9353 9399 9415 9428 9457 9610 9632 9642 9746 9750 9754 9894 9898 10030 10144 10153 10169 10190 10191 10195 10201 10212 10255 10301 10307 10312 10336 10371 10374 10375 10378 10379 10383 10386 10394 10399 10400 10414 10420 10422 10442 10444 10464 10472 10484 10544 10549 10560 10598 10604 10630 10691 10709 10749 10761 10764 10799 10817 10856 10888 10896 10911 10912 10927 10936 10938 10940 10979 10982 10999 11026 11050 11080 11084 11127 11130 11164 11195 11217 11253 11262 11264 11312 11337 11347 11351 11355 11375 11377 11382 11389 11416 11424 11447 11461 11498 11636 11694 11802 11810 11829 11831 11873 11875 11931 11936 11948 12121 12123 12306 12312 12317 12318 12325 12336 12360 12405 12569 12684 13314 13522 15350 16269 16282 16831 17239 17259 17264 17300 17357 17385 17503 17516 17525 17595 17622 17662 17668 17671 17674 17681 17682 17683 17692 17694 17695 17696 17698 17699 17700 17702 17703 17708 17712 17713 17714 17716 17727 17730 17749 17754 17766 17767 17793 17813 17840 17850 17886 17908 17980 18009 18017 18032 18038 18039 18060 18069 18071 18091 18099 18114 18153 18190 18206 18208 18209 18212 18367 18385 18387 18411 18534 18642 18747 18779 18782 18783 18784 18790 18794 18796 18820 18893 18895 18935 18941 18968 19020 19027 19030 19033 19036 19038 19059 19062 19067 19091 19094 19095 19141 19151 19177 19216 19283 19460 19462 19485 19506 19512 19566 19569 19609 19664 19676 19730 19776 19846 19847 19848 19849 19850 19897 19904 19950 19957 19990 19996 20021 20034 20055 20060 20061 20071 20073 20083 20090 20097 20111 20168 20209 20292 20323 20379 20384 20386 20460 22651 22654 22746 22890 23191 23197 23209 23210 23230 23528 23533 25079 25083 25245 25682 25690 25852 25944 25946 25965 25974 25981 25982 25986 26003 26019 26020 26022 26037 26039 26080 26125 26188 26208 26219 26262 26265 26292 26300 26303 26310 26313 26331 26346 26365 26375 26379 26393 26407 26427 26432 26443 26563 26867 26936 26946 26975 26997 26998 27005 27041 27051 27081 27088 27102 27122 27126 27127 27223 27225 27235 27247 27308 27343 27412 27423 27440 27460 27464 27477 27491 27520 27524 27537 27544 27580 27654 27664 27668 27699 27715 27719 27721 27732 27734 27740 27742 27760 27763 27765 27767 27773 27912 27914 27916 27936 27938 27941 27945 27948 27950 27966 27975 27982 28019 28029 28032 28054 28062 28063 28118 28141 28143 28148 28154 28174 28209 28221 28251 28275 28346 28356 28377 28390 28392 28396 28417 28430 28443 28467 28471 28492 28495 28496 28514 28517 28523 28529 28535 28540 28609 28611 28636 28654 30021 30029 30044 30970 31121 31354 31396 31398 31436 31465 31509 31534 31535 31630 31667 31669 32424 32500 36780 36786 36792 36844 40950 40956 45054 48738 48891 48951 49023 49113 491212.040811542443644e-19 2.821731604724377e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PAZh/42/313?format=asciiX-rayOpticaldefaultJ/PAZh/42/313/table1Catalog of 3<z<5.5 quasar candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNIndex number, within the tablemeta.idintName3XMM Source name in 3XMM-DR4meta.id;meta.maincharSRCIDSource number in 3XMM-DR4meta.idintRAJ2000Right ascension J2000 (degrees)degpos.eq.ra;meta.mainDEJ2000Declination J2000 (degrees)degpos.eq.dec;meta.mainFX05-2X-ray flux in 0.5-2keV (10^-14^erg/s/cm2)10aW.m**-2phot.flux;em.X-ray.softfloate_FX05-2Error on flux in 0.5-2keV (10^-14^erg/s/cm2)10aW.m**-2stat.errorfloatipmagSDSS (AB) PSF magnitude in i' bandmagphot.mag;em.opt.IfloatzpmagSDSS (AB) PSF magnitude in z' bandmagphot.mag;em.opt.Ifloatzspec? Spectroscopic redshiftsrc.redshiftfloatnullabler_zspec[0/1]? Reference for spectroscopic redshift (1)meta.ref;pos.frameintnullableFlag? zWarning for zref=0 or reference number from HMQ (Cat. VII/273) for zref=1 (1)meta.code.errorintnullablezphotPhotometric redshiftsrc.redshiftfloatFLPhotometric data flag (2)meta.codecharTQBest quasar template (3)meta.id;stat.fitintTSBest star template (4)meta.id;stat.fitcharNBandNumber of bands with reliable photometrymeta.numberintSloanDisplay the SDSS data for this quasarmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/PAZh/42/313/table2List of known quasars at z>3 not selected by our algorithmFLPhotometric data flag (2)meta.codecharTQBest quasar template (3)meta.id;stat.fitintTSBest star template (4)meta.id;stat.fitcharzphotPhotometric redshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNIndex number, within the tablemeta.idintName3XMM Source name in 3XMM-DR4meta.id;meta.maincharSRCIDSource number in 3XMM-DR4meta.idintRAJ2000Right ascension J2000 (degrees)degpos.eq.ra;meta.mainDEJ2000Declination J2000 (degrees)degpos.eq.dec;meta.mainFX05-2X-ray flux in 0.5-2keV (10^-14^erg/s/cm2)10aW.m**-2phot.flux;em.X-rayfloate_FX05-2Error on flux in 0.5-2keV (10^-14^erg/s/cm2)10aW.m**-2stat.errorfloatipmagSDSS (AB) PSF magnitude in i' bandmagphot.mag;em.opt.IfloatzpmagSDSS (AB) PSF magnitude in z' bandmagphot.mag;em.opt.Ifloatzspec? Spectroscopic redshiftsrc.redshiftfloatnullabler_zspec[0/1]? Reference for spectroscopic redshift (1)meta.ref;pos.frameintnullableFlag? zWarning for zref=0 or reference number from HMQ (Cat. VII/273) for zref=1 (1)meta.code.errorintnullableNBandNumber of bands with reliable photometrymeta.numberintSloanDisplay the SDSS data for this quasarmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar