J/A+A/483/903ivo://CDS.VizieR/J/A+A/483/903doi:10.26093/cds/vizier.34830903CDSBuccino A.P.Mauas P.J.D.2018-01-08T06:37:41Z2008-06-30T17:40:14ZCDS support team

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

cds-question@unistra.frdwarf-starslate-type-starsspectroscopyultraviolet-astronomyThe largest dataset of stellar activity measurements available at present is the one obtained at the Mount Wilson Observatory, where high-precision CaII H+K fluxes have been measured from 1966 for about 2200 stars. Since the MgII H and K lines at {lambda}2800{AA} are formed in a similar way to the CaII H+K emission lines, they are also good indicators of chromospheric structure. The International Ultraviolet Explorer (IUE) provides a large database of UV spectra in the band 1150-3350{AA} from 1978 to 1995, which can also be used to study stellar activity. The main purpose of this study is to use the IUE spectra in the analysis of magnetic activity of main sequence F-K stars. Combining IUE observations of MgII and optical spectroscopy of CaII, the registry of activity of stars can be extended in time.2008A&A...483..903Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/483/903CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVI/110 : Final Merged Log of IUE Observations (NASA-ESA, 2000)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/A+A/469/309 : Chromospheric activity in late-type stars (Cincunegui+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/483/903https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/483/903http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/483/903https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/483/903https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/483/903http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/483/903GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/483/903/table3 (Mount Wilson chromospheric activity indices (on 260 different stars))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/483/903/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/483/903/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/483/903/table3?GETtext/xml+votable180.050000true1.653266429.02150170.0055555555555555566/248 254 339 342 349 377 770 1032 1153 1341 1603 1779 1875 2381 2472 2650 2691 2723 2823 3005 3036 3102 3118 4438 4808 5074 5339 5531 5718 5731 5802 6073 6147 6154 6339 6354 6423 7262 7390 7459 8145 8476 8717 8788 8790 8845 8935 8985 9125 9145 9199 9327 9331 9403 9442 9801 9835 10034 10090 10164 10467 10474 10481 10556 10812 11204 11225 11290 11296 11403 11534 11620 11636 11844 11910 12303 12592 12784 12825 12864 12944 13110 13440 13620 13633 13814 13947 13960 13966 14144 14206 14459 14539 14630 14779 15170 15174 15177 15356 15562 15593 15944 16069 16105 16192 16220 17171 17219 17425 17576 17606 17965 18139 18441 19323 19507 19585 19797 19872 19912 20145 20278 20286 20328 20446 20657 21060 21177 21285 21723 21790 22120 22157 22300 22707-22708 22711 22805 23190-23191 23201 23230 23339 23342 23369 23503 23523 23525 23534-23535 23538 23544-23545 23548 23575 23774 23820 24151 24160 24218 24731 24793 24924 25231 25407 25444 25828 25869 25902 26174 26465 26521 26575 26753 26783 26975 27006 27268 27581 27822 27973 27980 28001 28136 28605 28838 29196 29311 29913 30458 30471 30475 30576 30665 30965 30995 31130 31132 31478 31751 31781 31789 31830 31939 31984 32070 32192 32321 32645 32757 33116 33281 33287 33447 33490 33849 33976 34217 34446 34577 34817 35064 35447 35968 36145 36446 36564 36664 36697 36762 37585 38064 39149 39461 39490 40486 41272 41295 41763 42385 42760 42899 44180 45032 45485 45669 45676 45865 47299 47519 47589 47825 47997 48355 48905https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/483/903?format=asciiUVdefaultJ/A+A/483/903/table3Mount Wilson chromospheric activity indices (on 260 different stars)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD star numbermeta.id;meta.mainintVmagVisual magnitude (1)magphot.mag;em.opt.VfloatB-VB-V color index (1)magphot.color;em.opt.B;em.opt.VfloatPlxParallax (1)maspos.parallaxfloatJDJulian date of observationdtime.epochdoubleObsYear of observationyrtime.epochfloatSMount Wilson activity indexmeta.code;spect.indexfloate_SMount Wilson activity index standard deviationstat.errorfloatIUEspIUE spectrummeta.id;obscharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main