J/ApJ/788/105ivo://CDS.VizieR/J/ApJ/788/105doi:10.26093/cds/vizier.17880105CDSFaccioli L.Smith M.C.Yuan H.-B.Zhang H.-H.Liu X.-W.Zhao H.-B.,Yao J.-S.2018-01-23T06:58:32Z2017-07-17T08:50:33ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyvariable-starsvisible-astronomysloan-photometrystellar-distancesurveysWe present a catalog of RR Lyrae stars (RRLs) observed by the Xuyi Schmidt Telescope Photometric Survey (XSTPS). The area we consider is located in the north Galactic cap, covering ~376.75 deg^2^ at RA~150{deg} and DE~27{deg} down to a magnitude limit of i~19. Using the variability information afforded by the multi-epoch nature of our XSTPS data, combined with colors from the Sloan Digital Sky Survey, we are able to identify candidate RRLs. We find 318 candidates, derive distances to them, and estimate the detection efficiency. The majority of our candidates have more than 12 observations, and for these we are able to calculate periods. These also allow us to estimate our contamination level, which we predict is between 30% and 40%. Finally, we use the sample to probe the halo density profile in the 9-49 kpc range and find that it can be well fitted by a double power law. We find good agreement between this model and the models derived for the south Galactic cap using the Watkins et al. (2009, J/MNRAS/398/1757) and Sesar et al. (2010, J/ApJ/708/717) RRL data sets, after accounting for possible contamination in our data set from Sagittarius stream members. We consider non-spherical double power-law models of the halo density profile and again find agreement with literature data sets, although we have limited power to constrain the flattening due to our small survey area. Much tighter constraints will be placed by current and future wide-area surveys, most notably ESA's astrometric Gaia mission. Our analysis demonstrates that surveys with a limited number of epochs can effectively be mined for RRLs. Our complete sample is provided as accompanying online material; as an example the first few entries of each electronic table are shown in the text.2014ApJ...788..105Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/788/105CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSXII/294 : The SDSS Photometric Catalog, Release 7J/AJ/127/1158 : QUEST RR Lyrae Survey first catalog (Vivas+, 2004)J/AJ/132/1202 : RR Lyrae in Northern Sky Variability SurveyJ/ApJ/678/851 : RR Lyrae survey in the Galactic Halo (Keller+, 2008)J/MNRAS/398/1757 : RR Lyraes in SDSS stripe 82 (Watkins+, 2009)J/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/788/105https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/788/105http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/788/105https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/788/105https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/788/105http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/788/105GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/788/105/table5 (SDSS matching information for the 318 RRL in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/788/105/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/788/105/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/788/105/table5?GETtext/xml+votable180.050000true124.9845916726.372808330.005555555555555556Cone search capability for table J/ApJ/788/105/table9 (Light curves for the 318 RRLs in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/788/105/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/788/105/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/788/105/table9?GETtext/xml+votable180.050000true124.98458326.3727780.005555555555555556Cone search capability for table J/ApJ/788/105/sample (Basic data (table 1), Efficiencies (table 7) and Heliocentric and galactocentric distances (table 10) for the 318 RRLs in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/788/105/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/788/105/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/788/105/sample?GETtext/xml+votable180.050000true124.984537526.372819440.005555555555555556Cone search capability for table J/ApJ/788/105/table6 (VSX catalog matches)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/788/105/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/788/105/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/788/105/table6?GETtext/xml+votable180.050000true125.0422826.71888690.0055555555555555565/1229 1230 1234 1236 1287 1295 1298 7039 7115 7116 7138 7140 6/4566 4567 4569 4570 4571 4573 4574 4581 4589 4591 4593 4598 4599 4601 4602 4603 4604 4605 4606 4823 4831 4852 4853 4885 4895 4903 4910 4914 4915 4924 4929 4931 4932 4949 4950 4952 4962 4964 4966 4995 4998 4999 5001 5008 5011 5012 5024 5026 5027 5142 5143 5145 5147 5159 5162 5163 5164 5166 5169 5170 5171 5174 5175 5177 5178 5179 5184 5185 5187 5189 5190 5191 5197 5200 5202 5210 5216 5218 5220 5248 5249 5250 5253 5256 5258 5259 5263 5264 5265 5267 5280 5282 5288 28122 28134 28138 28139 28141 28142 28144 28145 28146 28152 28155 28374 28375 28380 28382 28383 28391 28395 28396 28399 28400 28401 28403 28404 28405 28410 28412 28413 28415 28437 28438 28439 28443 28444 28445 28446 28455 28457 28459 28469 28470 28471 28472 28473 28476 28478 28481 28482 28483 28484 28487 28488 28491 28492 28494 28496 28500 28512 28513 28516 28520 28544 28546 28548 28556 28557 28566 28577 285782.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/788/105?format=asciiOpticaldefaultJ/ApJ/788/105/table5SDSS matching information for the 318 RRL in the samplegmagSDSS g band PSF magnitude (1)magphot.mag;em.opt.BfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/318] RRL candidate identifiermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainumagSDSS u band PSF magnitude (1)magphot.mag;em.opt.Ufloate_umagUncertainty in umagmagstat.error;phot.mag;em.opt.Ufloate_gmagUncertainty in gmagmagstat.error;phot.mag;em.opt.BfloatrmagSDSS r band PSF magnitude (1)magphot.mag;em.opt.Rfloate_rmagUncertainty in rmagmagstat.error;phot.mag;em.opt.RfloatimagSDSS i band PSF magnitude (1)magphot.mag;em.opt.Ifloate_imagUncertainty in imagmagstat.error;phot.mag;em.opt.IfloatzmagSDSS z band PSF magnitude (1)magphot.mag;em.opt.Ifloate_zmagUncertainty in zmagmagstat.error;phot.mag;em.opt.IfloatJ/ApJ/788/105/table8Periods for the 265 RRL candidates in the with at least 12 observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCLight curvesmeta.ref.urlcharID[13/318] RRL candidate identifier (1)meta.id;meta.mainintPeriodPerioddtime.perioddoubleLambdaLambda; see text (2)stat.fit.paramfloatEpochsEpoch excluded plus comments (3)time.epochcharJ/ApJ/788/105/table9Light curves for the 318 RRLs in the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/318] RRL candidate identifiermeta.id;meta.mainintBand[gri] Observational bandinstr.bandpasscharMJDModfied Julian Datedtime.epochdoublemagObserved XSTPS magnitude in Bandmagphot.magfloate_magUncertainty in magmagstat.error;phot.magfloatRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJ/ApJ/788/105/sampleBasic data (table 1), Efficiencies (table 7) and Heliocentric and galactocentric distances (table 10) for the 318 RRLs in the sampleSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCLight curvesmeta.ref.urlcharID[1/318] RRL candidate identifiermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maino_<imag>Number of epochs used in <imag>meta.numberint<imag>Mean i band magnitude across epochs (1)magphot.mag;em.opt.Ifloate_<imag>Uncertainty in <imag> (2)magstat.error;phot.mag;em.opt.Ifloatsd<imag>? Standard deviation in <imag> (3)magstat.stdev;phot.magfloatnullableo_<rmag>? Number of epochs used in <rmag> (4)meta.numberintnullable<rmag>? Mean r band magnitude across epochs (1)magphot.mag;em.opt.Rfloatnullablee_<rmag>? Uncertainty in <rmag> (2)magstat.error;phot.mag;em.opt.Rfloatnullablesd<rmag>? Standard deviation in <rmag> (3)magstat.stdev;phot.magfloatnullableo_<gmag>? Number of epochs used in <gmag> (4)meta.numberintnullable<gmag>? Mean g band magnitude across epochs (1)magphot.mag;em.opt.Bfloatnullablee_<gmag>? Uncertainty in <gmag> (2)magstat.error;phot.mag;em.opt.Bfloatnullablesd<gmag>? Standard deviation in <gmag> (3)magstat.stdev;phot.magfloatnullableEffDetection efficiencystat.paramfloatHDistHeliocentric Distancekpcpos.distance;pos.heliocentricdoublee_HDistUncertainty in HDistkpcstat.errordoubleGDistGalactocentric Distancekpcpos.distance;pos.galactocentricdoublee_GDistUncertainty in GDistkpcstat.errordoubleJ/ApJ/788/105/table6VSX catalog matchesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[2/318] RRL candidate identifiermeta.id;meta.mainintVSXVSX catalog identifier (Cat. B/vsx)meta.idcharTypeVSX catalog type (RRAB, EW, RRC)src.classcharPeriodVSX catalog perioddtime.period;meta.tabledouble_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main