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<ri:Resource created="2004-03-23T12:24:19Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>Hamburg/RASS Cat. of optical ident. V3.0</title><shortName>J/A+A/406/535</shortName><identifier>ivo://CDS.VizieR/J/A+A/406/535</identifier><altIdentifier>doi:10.26093/cds/vizier.34060535</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Zickgraf F.-J.</name></creator><creator><name>Engels D.</name></creator><creator><name>Hagen H.-J.</name></creator><creator><name>Reimers D.</name></creator><creator><name>Voges W.</name></creator><date role="Updated">2004-03-23T11:25:44Z</date><date role="Created">2004-03-23T12:24:19Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>x-ray-sources</subject><subject>galaxies</subject><subject>catalogs</subject><subject>quasars</subject><subject>astronomical-object-identification</subject><description>We present the Hamburg/RASS Catalogue (HRC) of optical identifications of X-ray sources at high-galactic latitude. The HRC includes all X-ray sources from the ROSAT Bright Source Catalogue (RASS-BSC) with galactic latitude |b|&gt;=30{deg} and declination DE&gt;=0{deg}. In this part of the sky covering ~10 000 deg^2^ the RASS-BSC contains 5341 X-ray sources. For the optical identification we used blue Schmidt prism and direct plates taken for the northern hemisphere Hamburg Quasar Survey (HQS) which are now available in digitized form. The limiting magnitudes are 18.5 and 20, respectively. For 82% of the selected RASS-BSC an identification could be given. For the rest either no counterpart was visible in the error circle or a plausible identification was not possible. With ~42% AGN represent the largest group of X-ray emitters, ~31% have a stellar counterpart, whereas galaxies and cluster of galaxies comprise only ~4% and ~5%, respectively. In ~3% of the RASS-BSC sources no object was visible on our blue direct plates within 40" around the X-ray source position. The catalogue is used as a source for the selection of (nearly) complete samples of the various classes of X-ray emitters.</description><source format="bibcode">2003A&amp;A...406..535Z</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/406/535</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/IX/10">IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/IX/29">IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)</relatedResource><relatedResource 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18923 18926-18927 18929 18932-18933 18935-18936 18939 18941 19053 19055 19062 19064-19065 19067 19094 19097-19098 19101 19121 19123 19144-19145 19147 19149 19156-19157 19159 19163-19164 19170 19175 19185-19187 19189-19190 19193 19202 19204 19209 19214 19227 19240 19249 19269-19270 19276-19277 19280 19283 19286-19287 19296 19302 19308-19309 19312-19314 19325 19340 19343-19344 19346 19350 19363 19366 19370-19371 19374 19376 19383 19393 19398-19400 19402 19405 19409 19411 19413-19414 19416 19420 19424 19432 19443 19445 19448-19449 19451-19452 19454 19459-19462 19464 19466-19467 19469 19477 19479 19485 19489 19493 19501-19502 19504 19507-19509 19516-19517 19519 19521-19522 19525-19526 19528 19531 19533 19536 19551 19553-19554 19556 19558 19563-19564 19566-19567 19570 19574 19576-19577 19583-19585 19587-19588 19592-19593 19614 19617 19622 19625 19633 19646 19651-19652 19654 19656 19658 19662 19665 19667 19670 19673 19685 19690 19698 19700 19702 19708-19709 19713 19716 19718 19722 19724 19726 19730 19736 19738 19746 19750 19756 19761 19767 19775 19777 19782-19783 19786 19789 19791 19797 19799 19802 19805 19819 19822 19825 19831-19832 19841 19848 19851 19858 19864 19867-19868 19874 19877 19879 19883 19886 19888 19897 19902 19905 19907-19910 19912 19921 19924 19930-19932 19935 19941 19945 19948-19949 19957-19958 19968 19970 19973 19976-19977 19983 20000 20005 20007 20012 20016 20025-20026 20029 20031 20071-20074 20079 20083-20086 20089 20091 20093 20095-20096 20099 20102 20113 20118-20119 20121 20127-20129 20145 20162 20164 20168-20169 20172 20177-20178 20180 20187 20192 20201-20202 20205 20209 20212 20216-20217 20220 20227 20230 20233 20240 20249 20253 20257 20262-20263 20265 20267 20269 20278 20282 20286 20290 20292 20298 20300-20302 20308-20309 20313-20315 20318 20323-20325 20327-20328 20332-20333 20352 20355 20357-20358 20361 20365 20371 20377-20378 20384 23129 23131 23134 23152 23154-23155 23157-23158 23161 23165-23166 23191 23207 23209 23213 23222 23230-23231 23233-23234 23236-23237 23240 23242 23244 23247-23248 23259 23265-23266 23269 23272-23273 23278-23279 23282 23284 23290 23292 23296 23306 23329 23342 23426 23438 23457 23461-23463 23469-23470 25947 25951 25959 25965 25968 25972 25980-25982 26010-26012 26015 26022 26036-26037 26041-26042 26046 26048 26050 26053-26054 26063 26065 26070 26072 26075-26076 26078 26080 26082-26083 26092 26094 26096 26100 26103 26107-26108 26110 26197 26203 26206 26217 26223 26226 26228 26233 26237 26239 26270 26279 26291-26292 26294 26297 26310 26313 26316 26319 26322-26323 26325 26327 26332 26335 26339-26340 26345-26346 26350 26352 26356 26358 26360 26363 26368-26369 26374 26376-26378 26380-26382 26394 26396 26398 26400-26401 26404 26406 26411-26412 26416 26419 26425-26426 26431-26432 26434 26443 26446 26452 26454 26460 26462 26467-26470 26475 26478 26480 26482-26483 26488-26490 26492-26494 26499-26500 26502-26503 26509 26511 26513 26520-26521 26523 26527-26528 26531-26532 26539 26543-26544 26547 26549 26551-26552 26555-26556 26558 26560 26563-26565 26567-26569 26571 26573-26574 26588 26590 26595-26596 26600 26602-26603 26606 26609 26613-26615 26617-26618 26623 26966 26969 26972 26975 26981 26986 26990 26995 27003 27037 27053 27056-27057 27060 27063 27074-27075 27079 27081-27082 27089 27092 27096-27097 27099 27102 27109 27111 27114-27116 27119 27129-27130 27223 27227 27229 27238 27241 27243 27245-27249 27253 27255-27256 27289-27291 27293 27303 27309-27310 27314 27324 27326-27327 27329 27337 27345 27348 27351-27353 27355 27359 27361-27362 27368 27374 27384-27385 27387 27390 27394-27396 27406 27411 27416 27418-27419 27428 27433 27435 27440 27442 27446 27448-27449 27454 27456-27458 27461-27462 27464 27472-27473 27476-27477 27481 27484-27486 27505 27509-27510 27513 27520 27523-27526 27528 27530 27532 27534 27536 27538 27544-27545 27547 27550 27552-27554 27561-27562 27565 27570 27574-27576 27602-27603 27609 27611-27612 27615 27636 27639 27641 27648-27649 27656 27658 27660 27663 27670 27675-27677 27679 27681-27682 27685-27687 27689-27692 27694 27705-27706 27709-27710 27714-27716 27718-27719 27726 27728-27729 27731 27734-27738 27742 27745 27748 27750-27751 27753 27760 27762-27763 27769-27770 27779 27781-27782 27784-27785 27787 27792 27795 27801 27813 27815-27816 27819 27821-27824 27826 27828 27833-27835 27837 27840 27845-27846 27848 27851 27854-27856 27858 27862-27863 27872 27879 27885-27886 27894-27895 27907 27909 27914 27917-27918 27924 27927 27930 27943 27954 27972-27973 27976-27977 27980 27982-27984 27989 27997-27998 28001 28005 28009-28010 28013 28018-28021 28023 28026 28031 28034 28041 28046 28050 28053 28060 28062-28063 28065 28067 28069 28075 28085-28088 28093 28095 28101 28103-28105 28107 28109 28114-28117 28119-28120 28122 28126-28127 28129 28131-28132 28134 28137-28139 28143 28148-28149 28151-28153 28156 28158 28162 28164-28165 28167 28170 28174 28180-28181 28184 28186 28191-28193 28195 28197-28200 28204 28206 28208 28210 28216 28220-28222 28225 28232 28234 28237 28239 28243-28245 28247-28249 28252 28256 28259-28261 28263 28265-28266 28268-28269 28271 28274-28278 28282-28283 28286-28289 28293-28294 28296-28297 28300 28303-28304 28307 28312 28315 28319-28320 28327-28328 28334-28337 28339 28341-28343 28346-28347 28349 28351-28352 28356 28359-28360 28363 28369 28372 28374 28380 28384 28386 28388-28389 28397 28400-28402 28412 28414 28419 28423 28426-28427 28429-28430 28432 28435 28438 28440 28442 28444 28448 28450-28451 28456 28458-28459 28461 28463-28465 28467 28469 28471 28480-28481 28483-28486 28490 28492 28496 28498 28500 28502 28508 28510 28512 28517-28520 28526-28527 28538 28540 28542-28543 28545-28546 28549 28552 28561 28571 28575-28576 28578 28580 28583-28586 28588-28590 28592 28594 28600 28603 28605 28607 28616 28622 28627 28641 28643 28645-28647 28654-28655 28657 28660 28663 31318 31341 31346 31349-31350 31356-31358 31389 31398-31399 31404 31407 31416 31419 31425 31428 31430 31433 31448-31450 31459 31461 31468 31472 31474 31478 31485 31495-31496 31501 31518 31523 31526-31527 31534-31537 31544 31546 31548 31566-31567 31594 31599-31600 31617 31623 31628 31630 31632 31634-31636 31648 31650-31654 31656 31660 31663 31666-31667 31679-31680 31685-31686 31693 31696 31698 31703 31707-31708 31727 31731 31742 32299-32300 32302 32314 32388 32392 32394 32401 32403 32409 32411 32414 32421 32426 32432 32436 32438 32441-32442 32444-32445 32456 32462 32472 32474 32480-32481 32483-32486 32491-32492 32497 32500 32503 32507 32674 32681-32683 32696 32698</spatial><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/406/535?format=ascii</footprint><waveband>X-ray</waveband></coverage><tableset><schema><name>default</name><table><name>J/A+A/406/535/x-ray</name><description>X-ray data</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>1RXS</name><description>Object name, 1RXS JHHMMSS.s+DDMMSS</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="16*">char</dataType></column><column><name>RASSCR</name><description>RASS count rate</description><unit>ct/s</unit><ucd>phot.count;em.X-ray</ucd></column><column><name>e_RASSCR</name><description>Error of count rate</description><unit>ct/s</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>HR1</name><description>Hardness ratio HR1 (1)</description><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_HR1</name><description>Error of HR1</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>HR2</name><description>Hardness ratio HR2 (1)</description><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_HR2</name><description>Error of HR2</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Ext</name><description>Source extension</description><unit>arcsec</unit><ucd>phys.angSize;src</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>L_Ext</name><description>Source extension likelihood</description><ucd>stat.likelihood</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>RX</name><description>RASS name, RX JHHMM.m+DDMM, as used in the first catalogue version</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="12*">char</dataType><flag>primary</flag></column><column><name>RA2000</name><description>Right ascension (2000.0)</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DE2000</name><description>Declination (2000.0)</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>errPos</name><description>Error radius derived from the BSC</description><unit>arcsec</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Seq</name><description>Internal number of the HRC data base</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="7*">char</dataType></column><column><name>Code</name><description>Type of source identification code (2)</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Flag1</name><description>[0/1]? 1: identification changed since last catalogue version</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Flag2</name><description>[0/1]? 1: entries to this X-ray position have changed since last catalogue version</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Flag3</name><description>[0/1]? 1: supplementary X-ray positions</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Date</name><description>? Date of last change (3)</description><ucd>time.epoch</ucd><flag>nullable</flag></column></table><table><name>J/A+A/406/535/optical</name><description>Optical data</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>RX</name><description>Name of the X-ray source</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="12*">char</dataType></column><column><name>OC</name><description>[+] + for proposed optical counterpart</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>NOpt</name><description>Running number of objects visible in the error circle ([ZEH2003] RX JHHMM.m+DDMM NN&gt;)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>n_NOpt</name><description>[P]</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>RA2000</name><description>? Right ascension (2000.0)</description><ucd>pos.eq.ra;meta.main</ucd><flag>nullable</flag></column><column><name>DE2000</name><description>? Declination (2000.0)</description><ucd>pos.eq.dec;meta.main</ucd><flag>nullable</flag></column><column><name>oRA</name><description>X-ray position - optical position in right ascension</description><unit>arcsec</unit><ucd>pos.eq.ra;arith.diff</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>oDE</name><description>X-ray position - optical position in declination</description><unit>arcsec</unit><ucd>pos.eq.dec;arith.diff</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>rXO</name><description>Distance between X-ray and optical position</description><unit>arcsec</unit><ucd>pos.angDistance</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>l_Bmag</name><description>Limit flag on Bmag (1)</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Bmag</name><description>? Optical magnitude B (no entry means no B magnitude available)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_Bmag</name><description>[uep:] Note on Bmag (2)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>B-R</name><description>? B-R colour index from USNA-A 2.0 Catalog (&lt;I/252&gt;)</description><unit>mag</unit><ucd>phot.color;em.opt.B;em.opt.R</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Class</name><description>Classification from objective prism spectrum (3)</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType" arraysize="9*">char</dataType></column><column><name>Note</name><description>Note when no position</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="13*">char</dataType></column></table></schema></tableset></ri:Resource>