uvby photometry of theta CrB

uvby photometry of theta CrBJ/A+A/329/579ivo://CDS.VizieR/J/A+A/329/579doi:10.26093/cds/vizier.33290579CDSFabregat J.Adelman S.J.1998-03-05T21:05:23Z1998-03-05T22:05:21ZCDS support team

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

cds-question@unistra.frbe-starsvisible-astronomymedium-band-photometryWe present differential uvby photometry of {theta} CrB obtained in 1994 and 1995, complemented by Balmer line spectroscopy. This star has been constant during this period, showing no short term periodic variability with an amplitude greater than 0.005mag., nor long term variations greater than 0.01mag. The lack of variability is associated with an inactive phase of the Be star, in which no emission features are present in the spectra. The only remarkable event observed was a fading episode on JD 2449779, with an amplitude of about 0.02 magnitudes in all bandpasses and duration of 0.2-0.3 days.1998A&A...329..579Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/329/579CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/103/1 : 63 And, HD 192913, HR 8240 & 108 Aqr (Adelman+ 1994)J/A+AS/106/333 : Alpha And, HD 184905, HR 8216 & HR 8434 (Adelman+ 1994)J/A+AS/111/41 : 56 Tauri, HD 111133, HD 126515 and HD 215441 (North+, 1995)J/A+AS/114/253 : HD 11187, HD 14940, HD 15144, 20 Eri, HR 8933 (Adelman+ 1995)J/PASP/109/9 : HR 1643, Theta Aur, 49 Cam, and HR 3724 (Adelman 1997)J/A+AS/122/249 : HD32633, 25 Sex, HR 7224, and HD 200311 (Adelman, 1997)J/A+AS/123/445 : uvby photometry of metallic + Hg-Mn stars (Adelman 1997)J/A+AS/125/65 : HD 37776, HR 2258, HR 6958 & 108 Aqu (Adelman, 1997)J/A+AS/125/497 : Theta Vir and 109 Vir uvby photometry (Adelman 1997)J/A+AS/128/245 : AR Aur, 3 Hya, 49 Cnc & BX Boo (Adelman 1997)J/A+A/333/952 : BVRI photometry of HR 1105 (Adelman 1997)J/A+AS/134/53 : HD 15980, HR 1094, 33 Gem, and HD 115708 (Adelman 1998)J/A+AS/136/111 : HD 35298, 19 Lyr, HD 192678 and HR 8216 (Adelman+ 1999)J/A+AS/136/379 : 45 Leo, HR 4330, 49 Her and HR 6718 (Adelman+ 1999)J/A+A/357/548 : HD 36668, 36 Lyn, HD 86952 & HR 8861 (Adelman 2000)J/A+AS/146/13 : 20 Eri, HR 1297, 12 CMa & HD 134214 (Adelman 2000)J/A+A/368/225 : HR 5341, HD 142070, HR 6967 & HR 8434 (Adelman, 2001)J/A+A/390/1023 : HR 194, HD 32966, HD 171782, and HR 7911 (Adelman+, 2002)J/A+A/401/357 : 60 Tau, HR 1528, HR 8216, HR 8770 (Adelman+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/329/579https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/329/579http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/329/579https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/329/579https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/329/579http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/329/579GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/329/579/table2aaCAM photometry, v-c datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDJulian datedtime.epochdoubleDymagDifferential magnitude, y filtermagphot.mag;arith.difffloatDbmagDifferential magnitude, b filtermagphot.mag;arith.difffloatDvmagDifferential magnitude, v filtermagphot.mag;arith.difffloatDumagDifferential magnitude, u filtermagphot.mag;arith.difffloat

J/A+A/329/579/table2abCAM photometry, c-ch datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDJulian datedtime.epochdoubleDymagDifferential magnitude, y filtermagphot.mag;arith.difffloatDbmagDifferential magnitude, b filtermagphot.mag;arith.difffloatDvmagDifferential magnitude, v filtermagphot.mag;arith.difffloatDumagDifferential magnitude, u filtermagphot.mag;arith.difffloat

J/A+A/329/579/table2bFCAPT photometry, all datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDuJulian date for the u filter datadtime.epochdoubleDu(v-c)v-c differential magnitude, u filtermagphot.mag;arith.difffloatDu(v-ch)v-ch differential magnitude, u filtermagphot.mag;arith.difffloatDu(c-ch)? c-ch differential magnitude, u filtermagphot.mag;arith.difffloatnullableHJDvJulian date for the v filter datadtime.epochdoubleDv(v-c)v-c differential magnitude, v filtermagphot.mag;arith.difffloatDv(v-ch)v-ch differential magnitude, v filtermagphot.mag;arith.difffloatDv(c-ch)c-ch differential magnitude, v filtermagphot.mag;arith.difffloatHJDbJulian date for the b filter datadtime.epochdoubleDb(v-c)v-c differential magnitude, b filtermagphot.mag;arith.difffloatDb(v-ch)v-ch differential magnitude, b filtermagphot.mag;arith.difffloatDb(c-ch)c-ch differential magnitude, b filtermagphot.mag;arith.difffloatHJDyJulian date for the y filter datadtime.epochdoubleDy(v-c)v-c differential magnitude, y filtermagphot.mag;arith.difffloatDy(v-ch)v-ch differential magnitude, y filtermagphot.mag;arith.difffloatDy(c-ch)c-ch differential magnitude, y filtermagphot.mag;arith.difffloat