J/AJ/150/107ivo://CDS.VizieR/J/AJ/150/107doi:10.26093/cds/vizier.51500107CDSYao X.Wang L.Wang X.Zhang T.Chen J.Yuan W.Mo J.Li W.Jin Z.,Wu X.Nie J.Zhou X.2017-06-28T12:46:59Z2016-03-16T14:05:16ZCDS support team

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

cds-question@unistra.frvariable-starseclipsing-binary-starsIn this paper, we report the detections of stellar variabilities from the first two years of observations of a sky area of about 1300 square degrees from the Tsinghua University-NAOC Transient Survey. A total of 1237 variable stars (including 299 new ones) were detected with a brightness <18.0mag and a magnitude variation >~0.1mag on a timescale from a few hours to a few hundred days. Among such detections, we tentatively identified 661 RR Lyrae stars, 431 binaries, 72 semi-regular pulsators, 29 Mira stars, 11 slow irregular variables, 11 RS Canum Venaticorum stars, 7 Gamma Doradus stars, 5 long-period variables, 3 W Virginis stars, 3 Delta Scuti stars, 2 Anomalous Cepheids, 1 Cepheid, and 1 nova-like star based on their time-series variability index J_s_ and their phased diagrams. Moreover, we found that 14 RR Lyrae stars show the Blazhko effect and 67 contact eclipsing binaries exhibit the O'Connell effect. Since the period and amplitude of light variations of RR Lyrae variables depend on their chemical compositions, their photometric observations can be used to investigate the distribution of metallicity along the direction perpendicular to the Galactic disk. We find that the metallicity of RR Lyrae stars shows large scatter at regions closer to the Galactic plane (e.g., -3.0<[Fe/H]<0) but tends to converge at [Fe/H]~-1.7 at larger Galactic latitudes. This variation may be related to the fact that the RRAB Lyrae stars in the Galactic halo come from globular clusters with different metallicities and vertical distances, i.e., OoI and OoII populations, favoring the dual-halo model.2015AJ....150..107Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/150/107CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)J/MNRAS/446/2251 : Southern Catalina Survey type-ab RR Lyrae (Torrealba+, 2015)J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)J/AJ/146/101 : LINEAR. III. Catalog of periodic variables (Palaversa+, 2013)J/AJ/132/1202 : RR Lyrae in Northern Sky Variability Survey (Kinemuchi+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/150/107https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/150/107http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/150/107https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/150/107https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/150/107http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/150/107GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/150/107/table1 (Variable stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/150/107/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/150/107/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/150/107/table1?GETtext/xml+votable180.050000true341.979833325.78322220.0055555555555555565/600 603 605 625 1657 1663 1709 1732 1747 1773 1778 1807 1831 2364 2367 2386 6934 6/290 925 949 950 956 957 967 970 971 973 974 979 984 986 992 996 997 998 1002 1003 1005 1007 1008 1009 1010 1016 1017 1019 1020 1021 1674 1676 1677 1678 1683 1689 1690 1691 1696 1698 1699 1700 1701 1702 1705 1707 1709 1711 2143 2165 2170 2173 2227 2238 2239 2247 2250 2251 2254 2255 2262 2275 2276 2278 2279 2289 2291 2292 2293 2314 2324 2345 2352 2359 2367 2369 2370 2374 2379 2381 2382 2383 2384 2386 2389 2390 2391 2392 2394 2397 2398 2399 2404 2406 2407 2409 2410 2417 2418 2419 2424 2425 2426 2428 2430 2434 2441 2444 2449 2451 2454 2457 2460 2496 2499 2505 2508 2509 2511 2512 2513 2581 2624 2626 2628 2629 2631 2640 3073 3074 3075 3076 3077 3080 3082 3083 3084 3086 3087 3104 3105 3106 5807 5817 5821 5822 5865 5869 5881 5882 5883 5886 5887 6056 6074 6075 6523 6527 6577 6582 6583 6585 6595 6596 6599 6602 6607 6610 6611 6620 6625 6627 6633 6637 6640 6643 6645 6646 6647 6649 6765 6772 6777 6778 6779 6780 6781 6782 6815 6835 6840 6841 6844 6845 6849 6850 6856 6858 6859 6860 6863 6865 6866 6867 6868 6869 6873 6874 6875 6877 6880 6881 6882 6884 6885 6886 6888 6889 6890 6892 6894 6897 6898 6899 6900 6901 6902 6904 6905 6907 6909 6915 6916 6918 6923 6925 6927 6934 6938 6939 6944 6945 6948 6950 6952 6954 6955 6958 6962 6968 6969 6971 6972 6973 6975 6978 6979 6982 6983 6986 6993 6994 6995 6996 6999 7000 7004 7006 7009 7011 7013 7014 7015 7017 7020 7023 7025 7026 7031 7034 7035 7038 7040 7041 7042 7045 7046 7047 7054 7055 7057 7058 7060 7062 7063 7064 7067 7068 7069 7070 7073 7074 7076 7077 7079 7081 7084 7087 7089 7090 7091 7096 7097 7100 7101 7102 7105 7107 7109 7110 7111 7116 7117 7118 7121 7176 7177 7179 7184 7190 7192 7197 7202 7203 7204 7207 7208 7214 7216 7224 7225 7226 7233 7237 7241 7244 7250 7253 7255 7263 7264 7265 7267 7271 7278 7279 7282 7286 7288 7290 7298 7299 7300 7301 7302 7305 7308 7312 7313 7317 7320 7321 7328 7331 7332 7333 7334 7336 7337 7338 7341 7342 7348 7350 7352 7353 7355 7356 7360 7362 7364 7366 7368 7370 7374 7376 7392 7430 7431 7434 7435 7440 7441 7682 7684 7685 7690 7692 8463 8465 8466 8467 8468 8469 8471 8473 8475 8477 8481 8484 8487 8492 8497 8500 8501 8503 8508 8510 8511 8512 8517 8518 8519 8520 8522 8523 8526 8527 8530 8532 8538 8544 8545 8547 8549 8553 8554 8556 8560 8592 8595 8597 9431 9433 9434 9435 9437 9439 9444 9446 9447 9449 9453 9455 9460 9461 9462 9467 9494 9498 9501 9502 9503 9509 9510 9513 9514 9515 9516 9517 9518 9521 9526 9527 9529 9531 9534 9550 9562 9569 9574 9578 9581 9602 9604 9605 9607 9609 9613 9614 9616 9627 9633 9635 9639 9641 9643 9644 9793 9794 9796 9797 9799 9801 9807 9808 9810 9812 9813 9815 9818 9828 9829 9840 9984 10270 10285 10290 10292 10295 10296 10299 10313 10316 10317 10330 10336 10337 10338 10340 10346 10348 10358 10370 10372 10374 10380 10381 10382 10385 10391 10393 10395 10400 10401 10403 10406 10411 10414 10415 10416 10420 10424 10433 10434 10435 10754 10758 10759 10763 13341 13376 13378 13380 13386 13387 13390 13391 13393 13394 13396 13398 13400 13401 13403 13412 13413 13425 13426 13570 20181 20185 20186 20199 20201 20202 20205 20206 20212 20213 20214 20218 20219 20220 20223 20266 20274 20278 20285 20328 20330 20352 20354 20355 20373 20381 20384 20389 20394 20395 20397 20417 27703 27709 27719 27723 27724 27725 27726 27729 27730 27731 27743 27744 27750 27751 27753 27754 27756 27762 27766 27769 27771 27772 27775 27841 27847 27853 27856 27859 27860 27862 27868 27870 27884 27888 27897 27900 27915 27937 27942 27951 27952 27962 27963 27965 27966 27967 28035 28036 28044 28045 28048 28049 28052 28064 28066 28067 28072 28075 28076 28125 28126 28141 28145 28146 28156 28157 28159 28225 28230 28231 28240 28245 28246 28248 28250 28255 28274 28275 28276 28278 28418 28421 28422 28423 28424 28425 28428 28496 28497 28500 28501 28502 28508 31676 31677 31678 31691 31698 31703 31704 31706 31708 31709 31710 31714 31719 31721 31722 31730 31736 31741 31743https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/150/107?format=asciidefaultJ/AJ/150/107/table1Variable starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldSurvey field identifiermeta.id;obs.fieldcharStarIdentifier within the fieldmeta.id;obs.fieldintRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.main<mag>[9.3/141.2] Mean unfiltered magnitude (2)magphot.magfloatAv[0.01/1.2] Line-of-sight extinction (3)magphys.absorptionfloatAmp[0/3.8] Amplitude of variation (4)magarith.rate;phot.magfloatJs[0.31/30] Welch-Stetson variability index J_s_ (Stetson, 1996PASP..108..851S)src.var.indexfloatPer1[0.1/730]? Period from our measurement (Tsinghua University-NAOC Transient Survey; TNTS)dtime.perioddoublenullableMethPeriod calculate method (LS, PDM, or VSX) (5)meta.notecharPer2[0.2/730]? Period from International Variable Star Index (VSX; cat. B/vsx)dtime.perioddoublenullableT0[121/882]? Epoch when primary eclipse or minimum light occurstime.epochfloatnullableTypeTentative classification about the variable star whenever possible (6)src.classcharVSX[V] Indicates a VSX variable (7)meta.codecharCSS[C] Indicates a CSS variable (7)meta.codecharNew[N] Indicates a new variablemeta.codecharLIN[L] Indicates a LINEAR variable (7)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar