J/A+A/700/A61ivo://CDS.VizieR/J/A+A/700/A61doi:10.26093/cds/vizier.37000061CDSBoller T.Salvato M.Buchner J.Freyberg M.Haberl F.Maitra C.,Schwope A.Robrade J.Rukdee S.Rau A.Grotova I.Waddell S.Ni Q.,Krumpe M.Georgakakis A.Merloni A.Nandra K.2025-08-27T20:01:20Z2025-08-05T09:25:38ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesWith its first All-Sky Survey (eRASS1), the extended ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spectrum-Roentgen-Gamma (SRG) mission has offered an unprecedented, comprehensive view of the variable X-ray sky. Featuring enhanced sensitivity, broader energy coverage, and improved resolution compared to prior surveys, the eRASS1 Data Release 1 (DR1) catalogue underwent a variability analysis, focusing on a substantial subset of 128669 sources, all exhibiting a net count exceeding 10. We performed multiple variability tests, utilising conventional normalised excess variance (NEV), maximum amplitude variability (AMP), and Bayesian excess variance methods (bexvar). The analysis focused on binned light curves, specifically employing one eroday (a great circle scan with a duration of 4 hours) binning of the German part of the first eROSITA all-sky survey (eROSITA-DE) data. i.e. the source sample covers only half of the sky. Within the 128,669 DR1 sources with light curves, our research pinpointed 808 light curves which show hints of variability according to the AMP test, and 298 according to the NEV test. However, after applying suitable thresholds, 90 (123) sources are significantly variable according to the AMP (NEV) tests. In addition, 1342 sources are considered variable according to the Bayesian test bexvar, the total number of unique sources is 1709, forming the catalogue of variable sources released with this paper. We cross-matched with existing X-ray catalogues and identified 258, 318, 598, and 120 sources in 4XMM DR13, 2SXPS, 2RXS, and CSC2.1, respectively. Only 27 sources overlap across all catalogues, while 882 are new X-ray detections from eROSITA DR1. About 70 per cent are coronal stars, 5 per cent QSOs, and 1.6 per cent are normal galaxies. We further subclassified 18 sources as LMXBs, 11 as HMXBs, and 14 as bright stars. In this paper, we analyse the variability of eRASS1 sources on a time scale of only a few days. To study the physics of variable sources, we need more deeply pointed observations with other X-ray missions or at least the final depth of the eRASS:8 observations. The time scale of the eRASS1 observations is not representative of the time scales of the expected upcoming eRASS catalogues. A substantial 52 per cent of the eRASS1 variable sources were first discovered with eROSITA. The DR1 variability catalogue is excellent for follow-up observations with telescopes like XMM-Newton, Chandra, or Swift.2025A&A...700A..61Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A61CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/682/A34 : SRG/eROSITA all-sky survey catalogs (eRASS1) (Merloni+, 2025)B/cb : Cataclysmic Binaries, LMXBs, and related objectsI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)VII/258 : Quasars and Active Galactic Nuclei (13th Ed.)IX/69 : XMM-Newton Serendipitous Source Catalogue 4XMM-DR13IX/58 : 2SXPS Swift X-ray telescope point source catalogueIX/70 : Chandra Source Catalog Release 2 (CSC 2.1) (Evans+, 2024)J/A+A/588/A103 : Second ROSAT all-sky survey (2RXS) source catalogJ/A+A/684/A121 : SRG/eROSITA all-sky survey coronal content (Freund+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/700/A61https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/700/A61http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/700/A61https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/700/A61https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/700/A61http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/700/A61GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/700/A61/varcat (eROSITA DR1 variability catalogue (table A1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A61/varcat?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A61/varcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A61/varcat?GETtext/xml+votable180.050000true1.4292523805286-50.11511971094270.0055555555555555565/9307 6/4208 4280 4298 4312 4314 4360 4381 4421 4439 4444 4461 4468 4493 4629 4669 4715 4733 4745 4790 4805 4864 4920 4954 5000 5047 5129 5224 5248 5279 5361 5420 5655 6148 6241 6266 6274 6305 6307 6338 6340 6656 20489 20498 20505 20509 20528 20532-20533 20536-20537 20554 20559 20576-20577 20589 20607 20609 20617 20627 20638 20649-20650 20659 20681 20696 20700-20701 20707 20720 20735 20748 20773 20805 20824 20834 20847 20891 20926 20940-20941 20962 20968 20970 20988 21010 21047 21061 21118 21125 21130 21135 21142 21146 21158 21161 21180 21202 21234-21235 21277 21331-21332 21356 21365 21370 21377 21385 21387 21389 21401 21403 21408-21409 21417 21422 21428-21429 21432-21433 21436 21438-21439 21475 21499 21502 21529 21562 21606-21607 21729 21886-21887 21932 21989 22031 22059 22091 22140 22156-22157 22164 22200 22205 22269 22289-22290 22410 22485 22496 22539 22547 22567 22581 22605 22616 22650 22692 22707-22708 22724 22788 22802 22804-22805 22812-22813 22830 22839 22851-22852 22854 22856-22857 22862 22866 22868-22869 22881 22884 22920 22924-22925 22939 22961 23010 23015 23039 23044 23067 23083 23086 23089 23101 23132 23138 23140 23189 23191 23303 23323 23369 23379 23385 23388 23393 23403 23411-23412 23415 23513 23518 23526 23556 23560 23564 23582 23588 23596 23623 23632-23633 23637 23652 23681 23687 23704 23730 23738 23772 23778-23779 23857 23885 24047 24084 24086 24120 24133 24151 24156 24185 24219 24260 24286 24430 24449 24451 24633 24641 24685 24707 24763 24818 24868 24905 24932 24971 25008 25010 25054 25066 25070 25090 25132 25195 25224 25235 25287 25340 25408 25479 25519 25553 25572 25585 25651 25709 25714 25743 25756 25779 25793 25826 25890 25950 25955 25991 26054 26083 26125 26131 26133 26144 26163 26193 26216 26278 26292 26357-26358 26368 26378 26406 26410-26411 26436 26460 26478 26481 26509 26521 26608 26643 26650 26677 26898 26935 26963 26965 27005 27056 27201 27223 27320 27359 27384 27419 27562 27663 27669 27763 27765 27821 27845 27872 27933 27951 27975 28041 28059 28178 28246 28252 28283 28304 28316 28334 28388 28396 28439 28457 28477 28481 28483 28517 28698 28723 28734 28737 28745 28808 28816 28835 28843-28844 29194 29199 29223 29226 30753 30755 30849 31361 32772 32779 32831 32834 32836 32842 32847 32858 32861 32870 32872 32885-32886 32912 32930-32931 32954 32972 32981 33027 33034 33036-33037 33042 33049 33053 33066-33067 33077 33091 33094-33095 33097 33099 33112-33113 33115-33116 33120-33121 33124-33126 33129 33136 33140 33144 33164 33193 33198 33224 33228 33233 33235 33247 33273 33287 33298 33328 33378 33394 33403 33462 33488 33493 33498 33501 33531 33557 33565 33572 33582 33587 33594-33595 33597 33608 33611 33613 33631 33639 33642 33662 33691 33694 33707 33713 33716 33754 33808 33815 33844 33848-33850 33861 33865-33866 33872 33880 33901 33907 33924 33926 33929-33930 33937 33943 33952 33956 33958 33966 33968 33980 33988 34005 34008 34012 34034 34046-34047 34062 34065 34068-34069 34074 34097 34099 34104 34124 34130 34139 34142 34145 34163 34168 34171 34173 34179-34182 34195-34196 34201 34208-34209 34217 34242 34245 34251 34259 34264 34270 34286 34293-34294 34300 34338 34370 34372 34377 34383 34385 34390 34409 34413-34414 34417 34430 34437 34443 34464 34481 34486 34502 34514 34520 34522 34525 34531 34538 34547 34554 34567 34576-34577 34594 34610 34613 34623 34625 34651 34655 34680 34690 34702 34708 34732 34740 34742 34757 34776 34789 34831 34845 34849 34881 34884 34886 34889 34892 34908 34972 35018 35074 35076 35099 35107 35121 35149-35150 35154 35191 35277 35360 35393 35418 35468 35501 35574 35611 35617 35635 35657 35670 35673 35690 35719 35725 35732 35778 35789 35811 35853 35860 35887 35890 35921 35926 35936 35944 35948 35950 35958 35981 36096 36125 36139 36158 36163 36167 36202 36206 36220 36235 36239 36323 36332 36342 36349 36360 36379 36421 36535 36565 36610 36615 36664 36668 36715 36725 36749 36755 36771-36772 36786 36865 36868 36899 36906-36907 36909-36910 36915 36919 36937 36956-36957 36972 37003 37012-37013 37038 37041 37072 37082-37083 37085 37087 37090 37092 37099-37102 37105 37113 37134 37137 37145 37147-37148 37162 37173 37177 37189 37207 37213 37216 37233-37234 37236 37245-37246 37253 37261 37272 37275 37285 37287 37293-37294 37306 37309-37310 37314 37316 37325 37328 37330 37333 37345 37353 37360 37367 37372 37385 37388 37395 37398 37403 37417-37419 37423 37428 37444 37447 37457-37458 37466-37467 37476 37491 37498 37508 37522 37528-37529 37557 37560 37570 37579-37580 37584-37585 37592 37597 37604 37616 37618 37623 37634 37643-37644 37647 37651-37652 37654 37656 37658 37661 37683-37684 37686 37688 37690 37695 37701 37706 37712-37713 37721 37761 37765 37767 37769-37770 37783 37796 37824 37833 37837 37840 37856 37858-37859 37866 37883 37886 37889-37891 37904 37906 37925 37934 37937 37946-37948 37959-37960 37962 37968-37969 37974-37975 37980 37993 38016 38025 38028-38029 38047 38052 38054 38056 38058 38061 38069 38081 38085 38089 38107 38113 38118 38143 38147-38148 38151 38176 38189 38199 38203 38205 38217 38254 38268 38285 38292 38294 38331 38344 38351 38359 38372 38411 38449 38472 38484 38522 38532-38533 38544 38551 38562 38660 38693 38758 38772 38777 38805 38815 38818 38852 38923 38930 38936-38938 38943 38950 38957 38966 38970-38971 38973 38985 39004 39011 39039 39041 39044 39051 39055 39057 39063 39068 39073 39083 39085 39087 39091 39104 39118 39122-39123 39156 39182 39187 39195 39202 39204 39208-39210 39216 39220 39226 39235 39248 39250 39260 39266-39267 39272 39276 39300 39303 39311-39312 39314 39329 39334 39336 39339 39344 39350 39370 39388 39396 39416 39466 39473 39491 39495 39497 39513-39514 39524 39585 39619 39637 39665 39671 39680 39694 39715 39723 39755 39762 39773 39789 39829 39833-39834 39857 39892 39904 39912 39924 39926 39937 39996-39997 40109 40113 40120 40131 40157 40281 40293 40435 40506 40508 40556 40586 40615 40635 40694 40699 40727 40784 40792 40830 40870 40988 41018 41030 41041 41044 41057 41065 41121 41125-41130 41132 41139 41146 41164 41166 41168 41173-41174 41178 41185 41206 41218 41220 41224 41227 41239 41247 41249 41257 41278-41279 41288 41290 41295 41301 41337 41363 41377 41384 41389 41397 41399 41403 41432 41446 41452 41468 41472 41477 41482 41500 41505-41506 41514-41515 41519 41529-41530 41535 41540 41550 41587-41588 41591 41596 41601 41606-41607 41609 41617-41618 41623 41631 41640 41643 41645 41648 41652 41656 41660-41661 41666 41670 41675 41681 41697 41700 41706 41708 41724 41727 41731 41737 41747-41749 41758 41760-41761 41763 41769 41790 41798 41802 41823 41856 41867 41876 41887 41899 41905 41921 41933 41952 41954 41958 41966 41974 41982 42018 42021 42061 42063 42096 42115 42121 42124 42140 42152 42155 42169 42176 42196 42214-42215 42225 42229 42242 42285 42303 42313 42315 42330-42331 42336 42374-42375 42379 42387 42393 42396 42401 42411 42415 42420 42426 42428 42434-42435 42437 42440 42446 42449 42464 42467 42483 42493 42516 42547 42555 42593 42596 42611 42614 42616 42618 42626 42633 42653 42671 42677 42691 42694 42698 42738 42743 42749 42761 42773 42787 42789 42791 42797 42813 42816 42829 42835 42844 42846-42847 42869 42876 42878 42896 42904 42910 42933 42938 42940 42950 42956 42958 42960 42965 42972 42979 42981 42984 42990 42994 43009 43011 43014 43017-43020 43028 43030-43033 43035 43039 43044 43057-43059 43061 43064 43066-43067 43069 43075 43086-43087 43093 43097-43099 43103 43108-43109 43115 43130 43139 43141-43142 43144 43149 43154 43158 43161 43171 43180 43187 43198 43201-43202 43208 43218 43235 43237-43238 43244 43258 43268 43273 43275 43282 43290 43294 43296 43299 43316 43321 43325 43338-43339 43341-43343 43360 43365 43372 43380 43382 43392 43394 43399 43403 43411-43412 43418 43421 43423 43449 43457 43479 43494 43526 43529-43530 43545-43546 43572 43576 43594 43598 43616 43626 43632 43652 43670 43676 43693 43704 43722 43754 43787 43798 43806 43838 43847 43863 43911 43933 43936 43947 44001 44040-44041 44051 44058 44067 44076 44087 44104 44111 44113 44121 44126 44135 44147 44163 44202 44205 44213 44215 44232 44251 44258 44261 44268 44270 44283 44290 44300 44305 44307-44308 44321 44330 44355-44356 44358 44360 44366-44368 44378-44379 44388 44400-44402 44418-44419 44468 44473 44481 44509 44536 44540 44551 44554 44583 44585 44596 44644 44658 44662 44701 44722 44751 44761 44788 44797 44813 44838 44860 44892 44924 44971 45083 45098 45118 45149 45168 45235 45243 45269 45299 45307 45367 45384 45389 45391 45415 45419 45453 45475 45510 45569 45580 45598 45671 45683 45736 45746 45749 45785 45854 45908 45927 45934 45942 45954 45970 45980 46044 46064 46119 46239 46365 46398 46406 46442 46450 46474 46507 46598 46629 46643 46754 47287 47360 47419 47428 47520 47522 47742 47769 47771 47805 47819 47824 47827 47849https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/700/A61?format=asciiX-raydefaultJ/A+A/700/A61/varcateROSITA DR1 variability catalogue (table A1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFNORADEerrSource contained no RADEErr in the pre-processed version of the catalogue (FLAG_NO_RADEC_ERR)meta.codeintRA6deg? Right Ascension of the source in the Gaia DR3 catalogue (GDR3_RA)degpos.eq.ranullableDE6deg? Declination of the source in the Gaia DR3 catalogue (GDR3_DEC)degpos.eq.decnullableSepeGDR3? Separation between eROSITA and GaiaDR3 sources (Sep_eRO_GDR3)arcsecpos.angDistancedoublenullableBSC5Corresponding ID in the BSC5 catalogue (BSC5_SourceID)meta.idcharRA7? Right Ascension of the source in the BSC5 catalogue (BSC5_RAJ2000)pos.eq.ranullableDE7? Declination of the source in the BSC5 catalogue (BSC5_DEJ2000)pos.eq.decnullableSepGBSC5? Separation between Gaia DR3 and BSC5 sources (Sep_GDR3_BSC5)arcsecpos.angDistancedoublenullableVVCorresponding ID in the Veron & Veron (VV) catalogue (VV_SourceID)meta.idcharRA8? Right Ascension of the source in the VV catalogue (VV_RAJ2000)pos.eq.ranullableIAUNameString containing the official IAU name of the source (IAUNAME)meta.id;meta.maincharDetUIdString unique detection ID (DETUID)meta.idcharSkyTileSky tile ID (SKYTILE)obs.fieldintIdSrcSource ID in each sky tile (ID_SRC)meta.idintUIdInteger unique detection (UID)meta.idUIdHard? Hard catalog UID of the source with a strong association, or -UID if the association is weak (UID_Hard)meta.idnullableIdClusterGroup ID of simultaneously fitted sources (ID_CLUSTER)meta.id.parentintRA_ICRSRight ascension (ICRS), corrected (RA)degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS), corrected (DEC)degpos.eq.dec;meta.maine_RA_ICRS? 1 sigma lower error of RA (RA_LOWERR)arcsecstat.error;pos.eq.radoublenullableE_RA_ICRS? 1 sigma upper error of RA (RA_UPERR)arcsecstat.error;stat.maxdoublenullablee_DE_ICRS? 1 sigma lower error of DEC (DEC_LOWERR)arcsecstat.error;pos.eq.decdoublenullableE_DE_ICRS? 1 sigma upper error of DEC (DEC_UPERR)arcsecstat.error;stat.maxdoublenullableposErr1 sigma position uncertainty (POS_ERR)arcsecstat.errordoubleRADEErrCombined positional error, raw output from PSF fitting (RADEC_ERR)arcsecstat.error;posGLONGalactic longitude (LII)degpos.galactic.lonGLATGalactic latitude (BII)degpos.galactic.latdoubleELONEcliptic longitude (ELON)degpos.ecliptic.lonELATEcliptic latitude (ELAT)degpos.ecliptic.latdoubleMJDModified Julian Date of the observation (MJD)dtime.epochdoubleb_MJDModified Julian Date of the first observation of a source (MJD_MIN)dtime.epochdoubleB_MJDModified Julian Date of the last observation of a source (MJD_MAX)dtime.epochdoubleEXTLikeExtent likelihood (EXT_LIKE)stat.likelihooddoubleDetLike0Detection likelihood (DET_LIKE_0)stat.likelihooddoubleMLcts1Source count rate in the 0.2 -2.3 KeV (ML_RATE_1)ctphot.count;em.X-raydoubles_MLcts1? 1sigma combined count rate error in the 0.2 -2.3 KeV (ML_RATE_ERR_1)ctphot.count;em.X-ray.softdoublenullablee_MLcts1? 1 sigma lower count rate error in the 0.2 -2.3 KeV (ML_RATE_LOWERR_1)ctstat.errordoublenullableE_MLcts1? 1 sigma lower count rate error in the 0.2 -2.3 KeV (ML_RATE_UPERR_1)ctstat.error;stat.maxdoublenullableMLFlux1Source flux in the 0.2 -2.3 KeV (ML_FLUX_1)mW.m**-2phot.flux;em.X-raydoubles_MLFlux1? 1 sigma combined flux error in the 0.2 -2.3 KeV (ML_FLUX_ERR_1)mW.m**-2stat.error;phot.flux;em.X-ray.softdoublenullablee_MLFlux1? 1 sigma lower flux error in the 0.2 -2.3 KeV (ML_FLUX_LOWERR_1)mW.m**-2stat.errordoublenullableE_MLFlux1? 1 sigma upper flux error in the 0.2 -2.3 KeV (ML_FLUX_UPERR_1)mW.m**-2stat.error;stat.maxdoublenullableFSPSNRSource may lie within an overdense region near a supernova remnant (FLAG_SP_SNR)meta.codeintFSPBPSSource may lie within an overdense region near a bright point source (FLAG_SP_BPS)meta.codeintFSPSCLSource may lie within an overdense region near a stellar cluster (FLAG_SP_SCL)meta.codeintFSPLGASource may lie within an overdense region near a local large galaxy (FLAG_SP_LGA)meta.codeintFSPGCConsSource may lie within an overdense region near a galaxy cluster (FLAG_SP_GC_CONS)meta.codeintFNOEXTerrSource contained no e_Ext in the pre-processed version of the catalogue (FLAG_NO_EXT_ERR)meta.codeintFNOCTSerrSource contained no e_Cts in the pre-processed version of the catalogue (FLAG_NO_CTS_ERR)meta.codeintNdataNumber of data points in the light curve (NDATA)meta.numberintAmplmaxMaximum Amplitude variability (see Sect. 4.2) (AMPL_max)src.var.amplitudedoublee_AmplmaxUncertainty on Maximum Amplitude Variability (see Sect. 4.2) (e_AMPL_max)stat.errorfloatq_AmplmaxThe ratio between Amp and e_Amp (see Sect. 4.2) (s_AMPL_max)meta.code.qualfloatNEVNormalized excess variance (see Sect. 4.2) (NEV_1)stat.variancedoublee_NEV? Uncertainty on Normalized excess variance (see Sect. 4.2) (e_NEV)stat.errorfloatnullableq_NEV? The ratio between NEV to e_NEV (see Sect. 4.2) (s_NEV)meta.code.qualfloatnullableScattsigma bexvar (see Sect. 4.2) (SCATT)stat.errordoubleb_Scattlower 10% quantile of sigma bexvar (see Sect. 4.2) (SCATT_LO)stat.stdev;stat.mindoubleB_Scatthigher 10% quantile of sigma bexvar (see Sect. 4.2) (SCATT_HI)stat.stdevdouble4XMM? Corresponding ID in the 4XMM catalogue (4XMM_SourceID)meta.idnullableRA1deg? Right Ascension (J2000) of the source in the 4XMM catalogue (4XMM_RAJ2000)degpos.eq.ranullableDE1deg? Declination (J2000) of the source in the 4XMM catalogue (4XMM_DEJ2000)degpos.eq.decnullableSepe4XMM? Separation between eROSITA and 4XMM sources (Sep_eRO_4XMM)arcsecpos.angDistancedoublenullable2SXPS? Corresponding ID in the 2SXPS catalogue (2SXPS_SourceID)meta.idintnullableRA2deg? Right Ascension of the source in the 2SXPS catalogue (2SXPS_RAJ2000)degpos.eq.ranullableDE2deg? Declination of the source in the 2SXPS catalogue (2SXPS_DEJ2000)degpos.eq.decnullableSepe2SXPS? Separation between eROSITA and 2SXPS sources (Sep_eRO_2SXPS)arcsecpos.angDistancedoublenullableRA3deg? Right Ascension of the source in the 2RXS catalogue (2RXS_RAJ2000)degpos.eq.ranullableDE3deg? Declination of the source in the 2RXS catalogue (2RXS_DEJ2000)degpos.eq.decnullableSepe2RXS? Separation between eROSITA and 2RXS sources (Sep_eRO_2RXS)arcsecpos.angDistancedoublenullableCSC2.1Corresponding ID (2CXO JHHMMSS.s+DDMMSSX) in the CSC2.1 catalogue (CSC2p1_SourceID)meta.idcharRA4deg? Right Ascension of the source in the CSC2.1 catalogue (CSC2p1_RAJ2000)degpos.eq.ranullableDE4deg? Declination of the source in the CSC2.1 catalogue (CSC2p1_DEJ2000)degpos.eq.decnullableSepeCSC2.1? Separation between eROSITA and CSC2.1 sources (Sep_eRO_CSC2p1)arcsecpos.angDistancedoublenullableHamstar? Corresponding Gaia DR3 in the Hamstar catalogue (Hamstar_SourceID)meta.idnullableRA5deg? Right Ascension of the Hamstar source in the Gaia DR3 catalogue (HGDR3_RAJ2000)degpos.eq.ranullableDE5deg? Declination of the Hamstar source in the Gaia DR3 catalogue (HGDR3_DEJ2000)degpos.eq.decnullableSepeHamst? Separation between eROSITA and Hamstar sources (Sep_ERO_Hamstar)arcsecpos.angDistancedoublenullableGaiaDR3? Corresponding ID from Salvato et al. 2025 in Gaia DR3 catalogue (GDR3_sourceID)meta.idnullableDE8? Declination of the source in the VV catalogue (VV_DEJ2000)pos.eq.decnullableSepGVV? Separation between Gaia DR3 and VV source (Sep_GDR3_VV)arcsecpos.angDistancedoublenullableLMXBCorresponding ID in the LMXB catalogue (LMXB_SourceID)meta.idcharRA9? Right Ascension of the source in the LMXB catalogue (LMXB_RAJ2000)pos.eq.ranullableDE9? Declination of the source in the LMXB catalogue (LMXB_DEJ2000)pos.eq.decnullableSepGLMXB? Separation between Gaia DR3 and LMXB sources (Sep_GDR3_LMXB)arcsecpos.angDistancedoublenullableHMXBCorresponding ID in the HMXB catalogue (HMXB_SourceID)meta.idcharRA10deg? Right Ascension of the source in the HMXB catalogue (HMXB_RAJ2000)degpos.eq.ranullableDE10deg? Declination of the source in the HMXB catalogue (HMXB_DEJ2000)degpos.eq.decnullableSepGHMXB? Separation between Gaia DR3 and HMXB sources (Sep_GDR3_HMXB)arcsecpos.angDistancedoublenullable2RXSCorresponding ID (2RXS JHHMMSS.s+DDMMSS) in the ROSAT/2RXS catalogue (2RXS_SourceID)meta.idchar