I/61Bivo://CDS.VizieR/I/61BCDSDieckvoss W.Heckmann O.2023-11-24T09:27:32Z2004-06-11T22:09:13ZCDS support team

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

cds-question@unistra.frastrometryproper-motionsphotographic-magnitudeThe AGK3 provides positions and proper motions for stars north of -2.5 degrees. For the most part, it contains the stars in the AGK2 but is based on newly remeasured reference stars whose positions were reduced to the FK4 system. A list of 446 AGK2 stars not in the AGK3 and of three new stars is provided. All plates were taken at the Bergedorf Observatory. In addition to the positions and proper motions, the catalog contains magnitudes and spectral types, the epoch of the observations, the epoch difference between the AGK2 and AGK3, and the BD numbers. Introduction: The AGK3 Star Catalogue of Positions and Proper Motions North of -2.5 Degrees Declination (hereinafter AGK3) was conceived and planned during discussions between O. Heckmann and D. Brouwer at Hamburg Observatory following the 1952 International Astronomical Union (IAU) General Assembly in Rome. It was concluded that an adequate number of reference stars (AGK3R) should be observed by as many meridian circles of as many observatories as possible, the revision of FK3, then in progress (FK4), should define the reference frame, and the same instruments as used for AGK2 should be used for the observations for AGK3. A formal recommendation was adopted through Commission 8 at the 1955 IAU General Assembly in Dublin, with the observatories at Babelsberg, Bergedorf, Bordeaux, Greenwich, Heidelberg, Nikolajew, Ottawa, Paris, Pulkovo, Strasbourg and Washington (USNO) to collaborate in the work, and with F. P. Scott (USNO) to coordinate the meridian circle observations of AGK3R stars. The completion of the photographic observations was to be the responsibility of the observatories at Bergedorf and Bonn, with all plate measurements to be done at the former. (However, it was finally decided that all plates, even for the AGK2 Bonn zones, would be taken at Bergedorf.) The plates for AGK3 were secured at Bergedorf between August 1956 and June 1964, with special precautions (exposures on both sides of the pier) made to compensate for possible changes in the camera objective. The two sets of plates were measured at Bergedorf in opposite directions and averaged to obtain final x,y coordinates. The detailed procedures for the correction of magnitude-color errors, reduction of the measures using the AGK3R stars, re-reduction of AGK2 using its reference catalog AGK2A transformed to the FK4 system, and final reduction of the AGK3 positions and proper motions, are discussed by W. Dieckvoss in his technical introduction to the source reference. Although a more detailed discussion of errors is given by Dieckvoss, the standard error for one coordinate on one plate as determined from a limited sample of 110 pairs of plates is +/- 0.025" for AGK3.1975AGK3..C......0Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/61BCatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/176 : AGK3U: an updated version of the AGK3 (Bucciarelli+ 1992)I/69 : AGK3 Catalogue by Right Ascension (Dieckvoss, Heckmann 1975)I/161 : AGK3R (Smith 1990)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/61Bhttps://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/61Bhttp://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/61Bhttps://vizier.cds.unistra.fr/viz-bin/votable?-source=I/61Bhttps://vizier.iucaa.in/viz-bin/votable?-source=I/61Bhttp://vizieridia.saao.ac.za/viz-bin/votable?-source=I/61BGETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/61B/agk3 (Catalog Data)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/61B/agk3?https://vizier.iucaa.in/viz-bin/conesearch/I/61B/agk3?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/61B/agk3?GETtext/xml+votable180.050000true7.8662491889.665273490.0055555555555555561/0 2 4 6 9 11-14 19 23 31 2/5-7 12 14-15 22 28-29 32-34 41 60-62 71 75 87 91 103 107-108 110-111 119 123 3/17-19 52-54 80 82-84 86-87 92 94 121-123 125-127 140 142-143 161-163 168-169 171-174 253-255 283 295 299 343 347 359 363 407 411 423 427 436 438-439 471 475 487 491 4/64-66 220-221 223 324-325 327 340-342 373-375 380 382-383 481-483 496-497 499 564-566 640 642-643 680-681 683 700 702-703 1008 1010-1011 1109-1111 1113-1114 1117-1119 1125-1127 1129-1131 1173-1175 1177-1179 1189-1191 1193-1195 1365-1367 1369-1371 1381-1383 1385-1387 1429-1431 1433-1435 1445-1447 1449-1451 1621-1623 1625-1627 1637-1639 1641-1643 1685-1687 1689-1691 1701-1703 1705-1707 1750-1751 1877-1879 1881-1883 1893-1895 1897-1899 1941-1943 1945-1947 1957-1959 1961-1963 5/268 270-271 888 890-891 1304 1306 1372-1373 1375 1488-1490 1524-1526 1920 1922-1923 1993-1995 2269-2271 2564-2566 2728-2730 2805-2807 4037-4039 4351 4415 4431 4435 4451 4460 4462-4465 4467 4495 4499 4515 4671 4687 4691 4707 4751 4755 4771 5375 5438-5439 5453 5455 5457-5459 5473-5475 5517 5519 5521-5523 5539 5695 5711 5715 5731 5775 5779 5795 6397-6399 6461-6463 6477-6479 6481 6497-6499 6541-6543 6545-6547 6561-6563 6717-6719 6733-6735 6737-6739 6753-6755 6797-6799 6801-6803 6817-6819 6992-6994 6997-6999 7421 7423 7487 7503 7507 7523 7567 7571 7587 7742-7743 7757 7759 7762-7763 7777-7779 7821 7823 7825 7827 7841-7843 9215 10237-10239 11261-11263 12287 6/1077-1079 3556 3558-3559 5220-5221 5223 5228 5230-5231 5496-5498 5964 5966-5967 6108-6109 6111 7684-7685 7687 7968 7970-7971 9072 9074-9075 10268 10270-10271 10924 10926-10927 11217-11219 16144-16145 16147 17399 17403 17655 17659 17717 17719 17722-17723 17733-17735 17739 17798-17799 17801 17803 17844 17846-17847 17864-17866 17975 17979 17991 17995 18054-18055 18059 18679 18682-18683 18743 18747 18759 18763 18823 18827 18999 19001-19003 19015 19017 19019 19078-19079 19082-19083 21493-21495 21497-21499 21727 21743 21747 21749-21751 21807 21811 21817-21819 21891 22073-22075 22083 22149-22151 22153-22155 22773-22775 22777-22779 22837-22839 22841-22843 22853-22855 22857-22859 22917-22919 22922-22923 23093-23095 23097 23099 23109 23111 23113 23115 23173 23175 23177 23179 25567 25583 25587 25823 25839 25843 25887 25903 25907 25923 25929-25931 25933-25935 25987 26143 26159 26163 26179 26241 26243 26846-26847 26861 26863 26867 26927 26931 26947 27011 27165 27167 27183 27187 27203 27267 27980 27982-27985 27987 29683 29689-29691 29942-29943 29945-29947 30005-30007 30011 30022-30023 30025-30027 30086-30087 30089-30091 30261-30263 30265-30267 30277-30279 30281 30283 30341-30343 30345-30347 30943 30959 30963 30965-30967 31023 31027 31033-31035 31045-31047 31107 31279 31289-31291 31299 31305 31307 31363 36855 36857-36859 40927 40943 40947 45039 45043 49143 49145-49147https://cdsarc.cds.unistra.fr/viz-bin/moc/I/61B?format=asciidefaultI/61B/agk3Catalog DataAGsign[-+ ]Sign of AGK3 number.meta.id.part;meta.maincharAGzoneAGK3 zone.meta.id.part;meta.mainintAGnumAGK3 numbermeta.id.part;meta.mainintindexed_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountpos.eq.decindexedm_AGnum[0ab ]Component for duplicatesmeta.code.multipcharPmagPhotographic magnitude from AGK2magphot.mag;em.optfloatSpSpectral typesrc.spTypecharRA1950Right ascension hours (1950.0)pos.eq.ra;meta.mainindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDE1950Declination degrees (1950.0)pos.eq.dec;meta.mainnobsNumber of photographic observationsmeta.numberintEp-1900Epoch of AGK3 position minus 1900yrtime.epochfloatpmRAAnnual proper motion in right ascensionarcsec/yrpos.pm;pos.eq.rafloatpmDEAnnual proper motion in declinationarcsec/yrpos.pm;pos.eq.decfloatdEpochEpoch difference AGK3-AGK2yrtime.intervalfloatindexedBDFull BD catalog designationmeta.idcharm_BDComponent of multiple systemmeta.code.multipcharSumSum of discrepancy codesmeta.codeintdRAThe difference in right ascension in the sense AGK3 - AGK2modifiedarcsecpos.eq.ra;arith.difffloatdDEThe difference in declination in the sense AGK3 - AGK2modifiedarcsecpos.eq.dec;arith.difffloat