J/ApJS/235/7ivo://CDS.VizieR/J/ApJS/235/7doi:10.26093/cds/vizier.22350007CDSHori T.Shidatsu M.Ueda Y.Kawamuro T.Morii M.Nakahira S.,Isobe N.Kawai N.Mihara T.Matsuoka M.Morita T.Nakajima M.,Negoro H.Oda S.Sakamoto T.Serino M.Sugizaki M.Tanimoto A.,Tomida H.Tsuboi Y.Tsunemi H.Ueno S.Yamaoka K.Yamada S.,Yoshida A.Iwakiri W.Kawakubo Y.Sugawara Y.Sugita S.Tachibana Y.,Yoshii T.2023-12-14T01:24:32Z2023-10-20T09:53:11ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsastronomical-object-identificationactive-galactic-nucleicataclysmic-variable-starssurveysx-ray-sourcesWe present the first MAXI/GSC X-ray source catalog in the low-Galactic-latitude sky |b|<10{deg} outside the Galactic center region (|b|<5{deg}, l<30{deg}, and l>330{deg}) based on 7-year data from 2009 August 13 to 2016 July 31. To overcome source confusion in crowded regions, we have accurately calibrated the position-dependent shape of the point-spread function of the MAXI/GSC by analyzing onboard data. We have also taken into account the Galactic ridge X-ray emission. Using a maximum likelihood image fitting method, we have detected 221 sources with a significance threshold >6.5{sigma}, 7 of which are transients only detected in 73-day time-sliced images. The faintest source has a flux of 5.2x10^-12^erg/cm^2^/s (or an intensity of 0.43mCrab) in the 4-10keV band. We have identified the counterparts for about 81% of the detected sources, by cross-matching with the Swift, Uhuru, RXTE, XMM-Newton, MCXC, and ROSAT all-sky survey catalogs. Our catalog contains the source name, position and its error, flux and detection significance in the 3-4keV, 4-10keV, and 10-20keV bands, hardness ratios, and information on the likely counterpart for the individual detected sources. We have obtained 73-day bin light curves of all the cataloged sources over 7 years and have calculated their periodograms. On the basis of the mean properties of time variability and spectral hardness, we suggest that the majority of the unidentified sources are low-mass X-ray binaries or blazars. Finally, we present the log N-log S relations at different Galactic longitudes and for different source populations.2018ApJS..235....7Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/235/7CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/4 : Fourth UHURU Catalogue (4U) (Forman+ 1978)VII/80 : The HEAO A-1 X-Ray Source Catalog (Wood+, 1984)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)J/ApJS/134/77 : ASCA Gal. Plane Survey faint X-ray sources (Sugizak+, 2001)J/A+A/411/L59 : INTEGRAL reference catalog (Ebisawa+, 2003)J/A+A/418/927 : RXTE All-Sky Slew Survey cat., |b|>10{deg} (Revnivtsev+, 2004)J/MNRAS/351/31 : XMM-Newton Galactic Plane Survey (XGPS) (Hands+, 2004)J/ApJ/635/214 : Chandra X-ray sources and NIR identifications (Ebisawa+, 2005)J/ApJS/170/175 : Third IBIS/ISGRI soft gamma-ray survey catalog (Bird+, 2007)J/A+A/480/611 : XMM-Newton Slew Survey catalogue, XMMSL1 (Saxton+, 2008)J/ApJS/186/1 : The 4th IBIS/ISGRI soft gamma-ray survey catalog (Bird+, 2010)J/A+A/534/A109 : MCXC Meta-Catalogue X-ray galaxy Clusters (Piffaretti+, 2011)J/PASJ/63/S677 : MAXI/GSC catalog in high Galactic-latitude sky (Hiroi+, 2011)J/A+A/553/A12 : XMM-Newton SSC survey of Gal. Plane (Nebot Gomez-Moran+, 2013)J/ApJS/207/19 : Hard X-ray survey from Swift-BAT 6yrs (Baumgartner+, 2013)J/ApJS/207/36 : 2nd MAXI/GSC cat. in high galactic-latitude sky (Hiroi+, 2013)J/ApJS/223/15 : 8yr INTEGRAL/IBIS soft gamma-ray source obs. (Bird+, 2016)J/other/NewA/47.81 : Distances of X-ray binaries (Islam+, 2016)J/ApJS/235/4 : The 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/235/7https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/235/7http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/235/7https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/235/7https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/235/7http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/235/7GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/235/7/catalog (Properties of the 7-year (Table 4) and 73-day (Table 5) sources in the MAXI/GSC catalog at |b|<10{deg} and possible counterparts (Tables 6 and 7))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/7/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/7/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/7/catalog?GETtext/xml+votable180.050000true0.00667.4490.0055555555555555566/1093 1253 1263 1465-1466 1796 1841 1853 2551 3023 3030 3041 3057 3063 3160 3272 3308-3309 3331 3384 3462 3617 3632 3649 3728-3729 3755 12973 13820 14000 14018 14051 14227 14251 14285 14336 14352 14365 14410 14437 14444 14452 14602 14610 14622 14632 14641 14664 14692 14704 14744 14777 15366 15368 15410 15428 15433 15477 15481 15644 15669 15683 20825 20861 20934 20984 21553 21643 21648 21707 22046 22252 23632 23637 23652 23757 23835 23995 24032 24044 24185 24275 24333 24381 24426 24451 24462 24559 28690 28705 28721 28736 28751 28968 28971 29072 29078 29126 29185 29192 29195 29232 29234 29259 29306 29547 29574 29660 29826 29838 29885 29923 30239 30299 30328 30331 30362 30394 30400 30417 30439 30506 30570 30580 30598 30618 30622 30625 30719 32030 37190 37207 37306 37330 37363-37364 37650 37732 37742 37778 37850 37891 37906-37907 37925 37968 38016 38028 38113 39182 39246 39266 39287 39300 39303 39319 39349 39775 39884 39912 39934 39937 39978 40580 40615 40635 41383-41384 41399 41423 41427 41435 41446 41530 41583 41586 41596 41637 41647 41653-41654 41662 41676 41679-41681 41685 41697 41706 41736 41754 41758 41760 41767 41802 41814 41823 41876 41893 41929 41951 42026-42027 42179 42315 42533 42547 42780 42784 42825 42841 42848 43009 43020 43024 43057 43064 43078 43098 43520https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/235/7?format=asciiX-raydefaultJ/ApJS/235/7/catalogProperties of the 7-year (Table 4) and 73-day (Table 5) sources in the MAXI/GSC catalog at |b|<10{deg} and possible counterparts (Tables 6 and 7)SimbadNameSimbad column added by the CDSmeta.idcharnullableCNamePossible counterpart namemeta.idcharRACdeg? Right ascension (J2000)degpos.eq.ranullableDECdeg[-70/68]? Declination (J2000)degpos.eq.decnullableSep[0.01/0.6]? Angular separation between the MAXI position and that of possible a counterpartdegpos.angDistancefloatnullableOTypeObject type (1)src.classcharFlagCross-matching flag (2)meta.code.errorcharNoteNote (3)meta.notechar3MAXI3MAXI identifier (JHHMM+DDMM)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/221] Running sequence number (nos 1-214 for the 7-year sources and nos 215-221 for the 73-day sources)meta.idintDEJ2000[-70/68] Declination (J2000)degpos.eq.dec;meta.mainePos[0.016/0.22]? The 1{sigma} statistical position errordegstat.error;pos.posAngfloatnullablesig4-10[6/2272] Significance in the 4-10keV bandstat.fit.goodnessfloatF4-10keV[5/13859] The observed 4-10keV flux in units of 10^-12^erg/cm^2^/s (1)1e-12mW.m**-2phot.flux;em.X-rayfloate_F4-10keV[0.7/12] F4-10keV uncertainty1e-12mW.m**-2stat.errorfloatsig3-4[0/1508] Significance in the 3-4keV bandstat.fit.goodnessfloatl_F3-4keVLimit flag on F3-4keVmeta.code.errorcharF3-4keV[0.2/3980] The observed 3-4keV flux in units of 10^-12^erg/cm^2^/s (2)1e-12mW.m**-2phot.flux;em.X-rayfloate_F3-4keV[0.2/4]? F3-4keV uncertainty1e-12mW.m**-2stat.errorfloatnullablesig10-20[0/998] Significance in the 10-20keV bandstat.fit.goodnessfloatl_F10-20keVLimit flag on F10-20keVmeta.code.errorcharF10-20keV[1.7/8510] The observed 10-20keV flux in units of 10^-12^erg/cm^2^/s (3)1e-12mW.m**-2phot.flux;em.X-rayfloate_F10-20keV[2.6/35]? F10-20keV uncertainty1e-12mW.m**-2stat.errorfloatnullableHR1[-0.9/1] HR(3-4keV, 4-10keV) calculated with Equation-2 (4)phot.flux;arith.ratiofloate_HR1[0/0.2] HR1 uncertaintystat.errorfloatHR2[-1/0.7] HR(4-10keV, 10-20keV) calculated with Equation-2 (4)phot.flux;arith.ratiofloate_HR2[0/0.5] HR2 uncertaintystat.errorfloatrms[-0.23/18.7] Excess variance ({sigma}^2^_rms) calculated with Equation-3stat.variancefloate_rms[0/0.4] rms uncertaintystat.error;instr.det.noisefloatBAT105Display data from Oh+ 2018, J/ApJS/235/4 within 10'meta.ref.urlintnullableRAJ2000Right ascension (J2000)degpos.eq.ra;meta.main