J/ApJS/240/16ivo://CDS.VizieR/J/ApJS/240/16doi:10.26093/cds/vizier.22400016CDSZhang H.Yu Z.Liang E.Yang M.Ashley M.C.B.Cui X.Du F.Fu J.,Gong X.Gu B.Hu YiJiang P.Liu H.Lawrence J.Liu Q.Li X.Li Z.,Ma B.Mould J.Shang Z.Suntzeff N.B.Tao C.Tian Q.Tinney C.G.,Uddin S.A.Wang L.Wang S.Wang X.Wei P.Wright D.Wu X.,Wittenmyer R.A.Xu L.Yang S.-H.Yu CeYuan X.Zheng J.Zhou H.,Zhou J.-L.Zhu Z.2021-07-09T08:41:01Z2019-06-06T09:49:15ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomysloan-photometrysurveysLocated at Dome A, the highest point of the Antarctic plateau, the Chinese Kunlun station is considered to be one of the best ground-based photometric sites because of its extremely cold, dry, and stable atmosphere. A target can be monitored from there for over 40 days without diurnal interruption during a polar winter. This makes Kunlun station a perfect site to search for short- period transiting exoplanets. Since 2008, an observatory has existed at Kunlun station, and three telescopes are working there. Using these telescopes, the AST3 project has been carried out over the last 6yr with a search for transiting exoplanets as one of its key programs (CHinese Exoplanet Searching Program from Antarctica --CHESPA). In the austral winters of 2016 and 2017, a set of target fields in the southern continuous viewing zone (CVZ) of TESS were monitored by the AST3-II telescope. In this paper, we introduce the CHESPA and present the first data release containing photometry of 26,578 bright stars (m_i_<=15). The best photometric precision at the optimum magnitude for the survey is around 2 mmag. To demonstrate the data quality, we also present a catalog of 221 variables with a brightness variation greater than 5mmag from the 2016 data. Among these variables, 179 are newly identified periodic variables not listed in the AAVSO database (https://www.aavso.org/), and 67 are listed in the Candidate Target List. These variables will require careful attention to avoid false-positive signals when searching for transiting exoplanets.2019ApJS..240...16Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/240/16CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)J/AJ/128/1748 : VR photometry of type II cepheids (Schmidt+, 2004)J/ApJ/628/411 : Identification & analysis of eclipsing binaries (Devor+, 2005)J/A+A/499/967 : Long-term monitoring of {gamma} Dor stars (Cuypers+, 2009)J/PASP/122/347 : Chinese Small Telescope ARray (CSTAR) (Zhou+, 2010)J/AJ/142/155 : Variable stars photometry from Dome A (Wang+, 2011)J/ApJS/218/20 : Photom. variability search in the CSTAR field (Wang+, 2015)J/AJ/151/166 : Flares & variables from 2009-2010 CSTAR (Oelkers+, 2016)J/AJ/153/104 : Variables observed in Galactic disk by AST3-1 (Wang+, 2017)J/AJ/156/234 : KELT transit false positive catalog for TESS (Collins+, 2018)J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)J/ApJS/240/17 : Exoplanets in the Antarctic sky. II. 116 cand. (Zhang+, 2019)http://www.njutido.com/tido/data.html : TIDO home pagehttp://casdc.china-vo.org/archive/ast3/II/dr1/ : China archive of AST3-II DR1https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/240/16https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/240/16http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/240/16https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/240/16https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/240/16http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/240/16GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/240/16/table4 (Variables from AST3-II observation in 2016)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/240/16/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/240/16/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/240/16/table4?GETtext/xml+votable180.050000true111.2878-70.40380.005555555555555556Cone search capability for table J/ApJS/240/16/dr1lcs (AST3-II DR1 detrended light curves list; table added by CDS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/240/16/dr1lcs?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/240/16/dr1lcs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/240/16/dr1lcs?GETtext/xml+votable180.050000true94.7145-73.36080.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJS/240/164/2337 2338 5/9347 9356 9357 9358 9376 9377 9378 6/37051 37052 37054 37055 37383 37387 37436 37437 37438 37516 37517 37518 37520 37521 37522 37536 37537https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/240/16?format=asciiOpticaldefaultJ/ApJS/240/16/table4Variables from AST3-II observation in 2016recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Target right ascension (J2000)degphys.size.radiusDEJ2000Target declination (J2000)degpos.eq.dec;meta.mainimag[7.5/15.1] APASS/Sloan i-band AB magnitudemagphot.mag;em.opt.IfloatTIC[41172665/453079732]? TESS Input Catalog ID (1)meta.id;meta.mainlongnullableTmag[6.6/14.7]? TESS magnitude (1)magphot.mag;em.optfloatnullableR*tic[0.4/17]? stellar radii, TESS input catalog (1)solRadphys.size.radiusfloatnullableM*tic[0.4/2.2]? stellar mass, TESS Input Catalog (1)solMassphys.massfloatnullableFlag[0/1] CTL flag (1=target is also selected in the target list of Stassun+ 2018, J/AJ/156/102)meta.code.errorintAAVSOAAVSO names (2)meta.id.crosscharPerA[0.09/5.6]? Period, from AAVSO (2)dtime.perioddoublenullableTypeAType, from AAVSO (2)(3)src.classcharPer[0.04/6.2] Period, from AST3-IIdtime.perioddoubleTypeType, from AST3-II (3)src.classcharS18Display data from Stassun+, 2018, J/AJ/156/102meta.ref.urlcharAPASSDisplay the data from APASS DR9 (II/336) within 0.5"meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 2"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJS/240/16/dr1lcsAST3-II DR1 detrended light curves list; table added by CDSRAJ2000[90.3/117.8] Target right ascension (J2000)degpos.eq.ra;meta.mainindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldAST3-II field (Tess004 to Tess013)meta.id;obs.fieldcharVarDetected variable (link to Table 4)meta.ref.urlintnullableimag[7/15] i-band AB magnitude in APASS databasemagphot.mag;em.opt.IfloatDEJ2000[-74.5/-68.5] Target declination (J2000)degpos.eq.dec;meta.mainindexedFileNameFile name in subdirectories lightcurves/detrended/Fieldmeta.id;meta.filecharAPASSDisplay the data from APASS DR9 (II/336) within 0.5"meta.ref.urlcharLCInteractive light curve plot for this sourcemeta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 2"meta.ref.urlchar