J/A+A/677/A186ivo://CDS.VizieR/J/A+A/677/A186doi:10.26093/cds/vizier.36770186CDSArmas Padilla M.Corral-Santana J.M.Borghese A.Cuneo V.A.,Munoz-Darias T.Casares J.Torres M.A.P.2025-02-06T20:01:00Z2023-09-27T07:53:27ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsstellar-distanceUltracompact X-ray binaries (UCXBs) are a distinctive but elusive family of low-mass X-ray binaries (LMXBs) characterised by their tight orbits and degenerate donor stars. Here we present UltraCompCAT, the first online and comprehensive catalogue of UCXBs. The initial version of UltraCompCAT comprises 49 sources, including 20 confirmed UCXBs (those with a measured orbital period shorter than 80 min) and 25 systems that we label 'candidates' based on their multi-wavelength phenomenology. For completeness, we also include four LMXBs with orbital periods in the range of 80 to 120 min, since they might be related to (e.g. close progenitors) or even part of the UCXB population that evolved towards longer periods. We discuss the orbital period and Galactic distribution of the catalogue sample. We provide evidence for the presence of at least two separate groups of UCXBs, one formed by persistent systems with orbital periods shorter than 30-min and a second group of transient objects (70%) with periods in the range of 40 to 60-min. We show that the former group is dominated by sources formed in globular clusters, while the latter accounts for the (known) UCXB population in the Galactic field. We discuss the possible evolutionary channels for the two groups.2023A&A...677A.186Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/677/A186CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttps://research.iac.es/proyecto/compactos/UltraCompCAT : Catalog Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/677/A186https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/677/A186http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/677/A186https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/677/A186https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/677/A186http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/677/A186GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/677/A186/catalog (Catalogue of ultra-compact and short orbital period X-ray binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/677/A186/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/677/A186/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/677/A186/catalog?GETtext/xml+votable180.050000true275.91875-30.3611361110.0055555555555555566/9346 12405 23652 28707 28721 28751 28779 28808 28819 28825 28831 28835 28844 28849 28860 28872 28901 28916 28950 29101 29195 29267 29514 29870 29923 30141 30298 30362 33321 34242 37294 37732 39978 40018 41279 41399 41816 42018 42364 42433 42446 42453 42466 42485 42487 42491 43057 47866https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/677/A186?format=asciiX-raydefaultJ/A+A/677/A186/catalogCatalogue of ultra-compact and short orbital period X-ray binariesP/T[PT] Type of accretion (2)meta.codecharSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/49] ID numbermeta.idintNamePreferred name of the systemmeta.id;meta.maincharONameOther name(s)meta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainAccretorConfirmed nature of the accretor (1)meta.codecharShort-B[Short-B ] Detection of short normal burstmeta.codecharIB[IB ] Detection of intermediate long burstmeta.codecharSB[SB ] Detection of superburstmeta.codecharl_Dist[~<] limit flag on Distmeta.code.errorcharDist? Distancekpcpos.distancefloatnullablee_Dist? Distance errorkpcstat.errorfloatnullabler_DistDistance reference (3)meta.ref;pos.framecharl_Dist2Limit flag on Dist2meta.code.errorcharDist2? Second distance valuekpcpos.distancefloatnullablee_Dist2? Second distance errorkpcstat.errorfloatnullablen_Dist2Second distance reference (3)meta.notecharPorb? Orbial periodmintime.perioddoublenullableFXUnabsorbed peak X-ray flux in (2-10)keV bandmW.m**-2phot.flux;em.X-raydoublemagPPeak Optical or IR apparent magnitudemagphot.magcharmagQQuiescence (q), if the system is transientmagphot.magchar