J/MNRAS/520/5635ivo://CDS.VizieR/J/MNRAS/520/5635doi:10.26093/cds/vizier/bg-g8-5g3CDSYang X.Hu Y.Shang Z.Ma B.Ashley M.C.B.Cui X.Du F.Fu J.,Gong X.Gu B.Jiang P.Li X.Li Z.Tao C.Wang L.Xu L.Yang S.-H.,Yu C.Yuan X.Zhou J.-L.Zhu Z.2026-04-30T05:56:03Z2026-04-29T15:48:54ZCDS support team

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

cds-question@unistra.frsurveysvariable-starssupernovaeexoplanetsastrometryphotometryvisible-astronomyAST3-2 is the second of the three Antarctic Survey Telescopes, aimed at wide-field time-domain optical astronomy. It is located at Dome A, Antarctica, which is by many measures the best optical astronomy site on the Earth's surface. Here we present the data from the AST3-2 automatic survey in 2016 and the photometry results. The median 5{sigma} limiting magnitude in i-band is 17.8 mag and the light-curve precision is 4 mmag for bright stars. The data release includes photometry for over 7 million stars, from which over 3500 variable stars were detected, with 70 of them newly discovered. We classify these new variables into different types by combining their light-curve features with stellar properties from surveys such as StarHorse.2023MNRAS.520.5635Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/5635CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/479/111 : AST3-1 Point Source Catalogue (Ma+, 2018)J/ApJS/240/16 : Exoplanets in the Antarctic sky. I. AST3-II DR1J/ApJS/240/17 : Exoplanets in the Antarctic sky. II. 116 candidatesJ/AJ/153/104 : Variables observed in the Galactic disk by AST3-1J/AJ/151/166 : Stellar flares and variables from 2009-2010 CSTARJ/AJ/142/155 : Variable stars photometry from Dome A (Wang+, 2011)J/PASP/122/347 : Chinese Small Telescope ARray (CSTAR) (Zhou+, 2010)II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)I/312 : PPMX Catalog of positions and proper motions (Roeser+ 2008)I/349 : StarHorse, Gaia DR2 photo-astrometric distancesI/322 : UCAC4 Catalogue (Zacharias+, 2012)I/320 : SPM 4.0 Catalog (Girard+, 2011)B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/520/5635https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/520/5635http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/520/5635https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/520/5635https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/520/5635http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/520/5635GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/520/5635/fields (The AST3-2 covering fields in 2200 deg^2^)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/5635/fields?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/5635/fields?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/5635/fields?GETtext/xml+votable180.050000true0.3652-44.90830.005555555555555556Cone search capability for table J/MNRAS/520/5635/sources (All i-band magnitude for our AST3-2 sources in the 565 fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/5635/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/5635/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/5635/sources?GETtext/xml+votable180.050000true1.2357306-44.52267160.005555555555555556Cone search capability for table J/MNRAS/520/5635/tablea1 (Photometry, stellar properties and variability informations of our new variable candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/5635/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/5635/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/5635/tablea1?GETtext/xml+votable180.050000true4.7306-53.71920.0055555555555555563/525-527 529-532 536 545-548 552 717-719 721-724 728 737 740 4/2077 2079 2095 2099 2115 2132 2136 2148 2152 2179 2196 2200 2212 2216 2435 2440-2442 2464 2847 2863 2867 2883 2900 2904 2916 2920 2947 2952-2953 2956-2957 2964 2968 5/8305 8313-8315 8373-8375 8377-8379 8389-8391 8393-8395 8453-8455 8457-8459 8536-8538 8548-8550 8552-8554 8596-8598 8600-8602 8612-8614 8616-8618 8709-8711 8713-8715 8788-8790 8792-8794 8804-8806 8808-8810 8852-8854 8856-8858 8868-8870 8872-8874 9401-9404 9733-9735 9737-9739 9744 9746-9747 9752 9772 9864 9866 9888 10354-10355 10358 10364 10501-10503 10512 11381-11383 11385-11387 11445-11447 11449-11451 11461-11463 11465-11467 11525-11527 11529-11531 11604-11606 11608-11610 11620-11622 11624-11626 11668-11670 11672-11674 11684-11686 11688-11690 11781-11783 11785-11787 11816-11817 11820-11821 11823 11832-11833 11835-11837 11860-11862 11864-11866 11876-11878 11880-11882 6/16384-16386 33053-33055 33073 33076-33077 33098-33099 33102 33120-33121 33124 33135 33146-33147 33151 33215 33219 33225 33228-33229 33231 33251 33407 33471 33487 33491 33507 33551 33555 33571 33807 33811 33827 34128-34130 34138-34139 34156-34158 34160-34162 34204-34206 34220-34222 34224-34226 34240-34242 34396-34398 34412-34414 34416-34418 34460-34462 34476-34478 34480-34482 34496-34498 34560-34562 34831 34835 34851 35164-35166 35180-35182 35184-35186 35228-35230 35244-35246 35248-35250 35264-35266 35420-35422 35436-35438 35440-35442 35484-35486 35500-35502 35504-35506 35520-35522 35584-35586 35840-35842 37567 37583 37592 37594-37595 37603 37624-37626 38927 38931 38947 38980-38982 39012 39016 39092 39096 39098 39112 39440 39442 39448 39460 39462 39468 39470 39556 39560 39584 39586 41375 41411 41414-41415 41426 41436 41438-41441 41444-41445 41447 41460-41462 41999 42003 42020-42021 42032-42033 42036-42037 42052-42054 42056-42058 42064-42065 42068 45439 45503 45519 45523 45539 45695 45759 45775 45779 45795 45839 45843 45859 46095 46099 46115 46428-46430 46444-46446 46448-46450 46492-46494 46508-46510 46512-46514 46528-46530 46684-46686 46700-46702 46704-46706 46748-46750 46764-46766 46768-46770 46784-46786 46848-46850 47119 47123 47139 47272 47276-47277 47279 47288 47336-47337 47352-47353 47356-47358 47452-47454 47468-47470 47472-47474 47516-47518 47532-47534 47536-47538 47552-47554 47873 48128-481302.381800341673347e-19 2.821731604724377e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/520/5635?format=asciiOpticaldefaultJ/MNRAS/520/5635/fieldsThe AST3-2 covering fields in 2200 deg^2^recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldThe covering field name as (FDDD.dddd+/-DD.dddd)obs.fieldcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainNbrNumber of the sources in the fieldmeta.numberintFileNameName of the field file in iband foldermeta.id;meta.filecharJ/MNRAS/520/5635/sourcesAll i-band magnitude for our AST3-2 sources in the 565 fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldThe covering field name as (FDDD.dddd+/-DD.dddd) (Field)obs.fieldcharAST3IISource target identifier as (AST3IIDDD.dddd+/-DD.dddd) (ID)meta.id;meta.maincharplotLight curvesmeta.ref.urlcharLCDisplay the light curve fits file of the source from the NADC archivesmeta.ref.urlcharRAJ2000Right ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) (Dec.)degpos.eq.dec;meta.mainindexedimagMedian aperture magnitudes in AST3-2 SDSS i band filter (MAG)magphot.mag;em.opt.Idoublee_imagStandard deviation of imag (MAGERR)magstat.error;phot.magdoubleo_AST3IINumber of observations (COUNT)meta.numberintAST3-1Display the AST3-1 Point Source Catalogue of Ma et al. 2018MNRAS.479..111M, Cat. J/MNRAS/479/111meta.ref.urlcharAnders19Display the Starhorse catalog of Anders et al. 2019A&A...628A..94A, Cat. I/349meta.ref.urlcharJ/MNRAS/520/5635/tablea1Photometry, stellar properties and variability informations of our new variable candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAST3IISource target identifier as (AST3IIDDD.dddd+/-DD.dddd) (ID)meta.id;meta.maincharimagMedian aperture magnitudes in AST3-2 SDSS i band filter (MAG)magphot.mag;em.opt.IfloatPerVariability period (Period)dsrc.varfloatAmpAmplitude of variability (Amplitude)magsrc.varfloatTypeType of variable (Type) (1)src.classcharB-VThe B-V colour magnitude (B-V)magphot.color;em.opt.B;em.opt.Vfloatr_B-VLiterature reference of B-V values (B-Vreference) (2)meta.ref;phot.color;em.opt.BcharTeff? Effective temperature taken from StarHorse catalogue of Anders et al. 2019A&A...628A..94A , Cat. I/349 (T_eff_)Kphys.temperature.effectiveintnullablelogg? Surface gravity taken from StarHorse catalogue of Anders et al. 2019A&A...628A..94A , Cat. I/349 (logg)log(cm.s**-2)phys.gravityfloatnullable[Fe/H]? Iron to hydrogen abundance ratio taken from StarHorse catalogue of Anders et al. 2019A&A...628A..94A , Cat. I/349 ([Fe/H])log(Sun)phys.abund.Fe;arith.ratiofloatnullableAnders19Display the Starhorse catalog of Anders et al. 2019A&A...628A..94A, Cat. I/349meta.ref.urlchar_RAPositions from AST3II names (right ascension part)degpos.eq.ra;meta.main_DEPositions from AST3II names (declination part)degpos.eq.dec;meta.main