II/271Aivo://CDS.VizieR/II/271ACDSDroegeT. F.RichmondM. W.SallmanM.2016-02-18T06:23:41Z2007-07-29T08:52:21ZCDS support team

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

cds-question@unistra.frsurveysphotometryvariable-starsThe Amateur Sky Survey (TASS) is a loose confederation of amateur and professional astronomers. We describe the design and construction of our Mark IV systems, a set of wide-field telescopes with CCD cameras which take simultaneous images in the V and I passbands. We explain our observational procedures and the pipeline which processes and reduces the images into lists of stellar positions and magnitudes. We have compiled a large database of measurements for stars in the northern celestial hemisphere with V-band magnitudes in the range 7<V<13. This paper describes data taken over the four-year period starting November, 2001. One of our results is a catalog of repeated measurements on the Johnson-Cousins system for over 4.3 million stars. This Version 2 of the catalog corrects a systematic error in photometry as function of Declination.2006PASP..118.1666Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/II/271ACatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/230 : TASS Mark III photometric survey (Richmond+, 2000)http://www.tass-survey.org : TASS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=II/271Ahttps://vizier.iucaa.in/viz-bin/VizieR-2?-source=II/271Ahttp://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/271Ahttps://vizier.cds.unistra.fr/viz-bin/votable?-source=II/271Ahttps://vizier.iucaa.in/viz-bin/votable?-source=II/271Ahttp://vizieridia.saao.ac.za/viz-bin/votable?-source=II/271AGETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table II/271A/patch2 (*Properties of objects detected repeatedly during the Mark IV survey of northern sky (V.2))https://vizier.cds.unistra.fr/viz-bin/conesearch/II/271A/patch2?https://vizier.iucaa.in/viz-bin/conesearch/II/271A/patch2?http://vizieridia.saao.ac.za/viz-bin/conesearch/II/271A/patch2?GETtext/xml+votable180.050000true0.00042-5.494260.0055555555555555561/0 1 2 4 5 6 8 9 10 12 13 14 19 23 27 31 2/12 13 14 28 29 30 44 45 46 60 61 62 71 75 87 91 103 107 119 123 3/60 61 62 124 125 126 188 189 190 252 253 254 277 278 279 281 282 283 293 294 295 297 298 299 341 342 343 345 346 347 357 358 359 361 362 363 405 406 407 409 410 411 421 422 423 425 426 427 469 470 471 473 474 475 485 486 487 489 490 491 4/252 253 254 508 509 510 764 765 766 1020 1021 1022 1087 1103 1107 1123 1167 1171 1187 1343 1359 1363 1379 1423 1427 1443 1599 1615 1619 1635 1679 1683 1699 1855 1871 1875 1891 1935 1939 1955 2303 2559 2815 3071 5/1020 1021 1022 2044 2045 2046 3068 3069 3070 4092 4093 4094 4341 4342 4343 4345 4346 4347 4405 4406 4407 4409 4410 4411 4421 4422 4423 4425 4426 4427 4485 4486 4487 4489 4490 4491 4661 4662 4663 4665 4666 4667 4677 4678 4679 4681 4682 4683 4741 4742 4743 4745 4746 4747 5365 5366 5367 5369 5370 5371 5429 5430 5431 5433 5434 5435 5445 5446 5447 5449 5450 5451 5509 5510 5511 5513 5514 5515 5685 5686 5687 5689 5690 5691 5701 5702 5703 5705 5706 5707 5765 5766 5767 5769 5770 5771 6389 6390 6391 6393 6394 6395 6453 6454 6455 6457 6458 6459 6469 6470 6471 6473 6474 6475 6533 6534 6535 6537 6538 6539 6709 6710 6711 6713 6714 6715 6725 6726 6727 6729 6730 6731 6789 6790 6791 6793 6794 6795 7413 7414 7415 7417 7418 7419 7477 7478 7479 7481 7482 7483 7493 7494 7495 7497 7498 7499 7557 7558 7559 7561 7562 7563 7733 7734 7735 7737 7738 7739 7749 7750 7751 7753 7754 7755 7813 7814 7815 7817 7818 7819 9205 9206 9207 9209 9210 9211 10229 10230 10231 10233 10234 10235 11253 11254 11255 11257 11258 11259 12277 12278 12279 12281 12282 12283 6/4092 4093 4094 8188 8189 8190 12284 12285 12286 16380 16381 16382 17278 17279 17341 17343 17357 17358 17359 17361 17362 17363 17378 17379 17534 17535 17597 17598 17599 17614 17615 17619 17634 17635 17677 17678 17679 17681 17682 17683 17699 17933 17934 17935 17937 17938 17939 17953 17954 17955 18558 18559 18621 18622 18623 18637 18638 18639 18641 18642 18643 18657 18658 18659 18701 18702 18703 18705 18706 18707 18721 18723 18958 18959 18961 18962 18963 18978 18979 21373 21374 21375 21437 21438 21439 21453 21454 21455 21457 21458 21459 21473 21474 21475 21629 21630 21631 21693 21694 21695 21709 21710 21711 21713 21714 21715 21729 21730 21731 21773 21774 21775 21777 21778 21779 21793 21794 21795 22029 22030 22031 22033 22034 22035 22049 22050 22051 22654 22655 22717 22718 22719 22733 22735 22737 22738 22739 22753 22754 22755 22797 22798 22799 22801 22803 22817 22818 22819 23053 23054 23055 23057 23058 23059 23073 23075 25471 25534 25535 25550 25551 25553 25554 25555 25571 25725 25727 25789 25790 25791 25805 25807 25809 25810 25811 25826 25827 25869 25870 25871 25873 25874 25875 25889 25890 25891 26126 26127 26129 26130 26131 26145 26146 26147 26749 26750 26751 26813 26815 26829 26830 26831 26833 26834 26835 26849 26850 26851 26895 26899 26914 26915 27149 27151 27153 27154 27155 27169 27170 27171 29565 29566 29567 29629 29631 29646 29647 29649 29650 29651 29666 29667 29821 29822 29823 29885 29886 29887 29901 29902 29903 29905 29906 29907 29921 29922 29923 29965 29966 29967 29969 29970 29971 29985 29986 29987 30221 30222 30223 30225 30226 30227 30241 30242 30243 30845 30846 30847 30911 30925 30927 30929 30931 30945 30946 30947 30989 30990 30991 30993 30994 30995 31009 31010 31011 31245 31246 31247 31251 31266 31267 36733 36734 36735 36797 36799 36813 36815 36819 36835 40829 40830 40831 40893 40894 40895 40909 40910 40911 40913 40914 40915 40929 40930 40931 44925 44926 44927 44989 44991 45005 45007 45009 45010 45011 45026 45027 49021 49022 49023 49085 49086 49087 49101 49102 49103 49105 49107 49121 49122 491233.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/II/271A?format=asciiOpticaldefaultII/271A/patch2*Properties of objects detected repeatedly during the Mark IV survey of northern sky (V.2)TASS4Index in Mark IV engineering databasemeta.id;meta.mainintprimaryindexedo_TASS4Number of good (V,I) measurement pairsmeta.numberintRAJ2000Mean Right Ascension (J2000.0)degpos.eq.ra;meta.mainindexede_RAJ2000Standard deviation from mean RA positiondegstat.error;pos.eq.radoubleDEJ2000Mean Declination (J2000.0)degpos.eq.dec;meta.mainindexede_DEJ2000Standard deviation from mean Dec positiondegstat.error;pos.eq.decdoubleVmagInterquartile mean of all V-band measurements (5)magphot.mag;em.opt.Vfloate_VmagStandard deviation from interquartile mean Vmagstat.error;phot.mag;em.opt.VfloateVmagStandard deviation from mean V value in ensemble analysis of local patch (1)magstat.stdev;phot.mag;em.opt.VfloatImagInterquartile mean of all I-band measurements (5)magphot.mag;em.opt.I;stat.meanfloate_ImagStandard deviation from interquartile mean Imagstat.error;phot.mag;em.opt.IfloateImagStandard deviation from mean I value in ensemble analysis of local patch (1)magstat.stdev;phot.mag;em.opt.IfloatdVmagNormalized measure of deviation from mean V magnitude in ensemble analysis (2)stat.variancefloatdImagNormalized measure of deviation from mean I magnitude in ensemble analysis (2)stat.variancefloatWSWelch-Stetson variability index (3)meta.code;src.var.indexfloatindexedProxyProximity code (4)meta.codeintEnvEnvironment when nearby star(s) exist within 1arcminmeta.ref.urlchar