J/A+AS/125/497ivo://CDS.VizieR/J/A+AS/125/497CDSAdelman S.J.1998-04-25T14:52:43Z1998-04-25T14:52:14ZCDS support team

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

cds-question@unistra.frdwarf-starsa-starsvisible-astronomymedium-band-photometryDifferential Stroemgren uvby photometric observations from the Four College Automated Photoelectric Telescope are used to examine the possible variability of the spectrophotometric standards {theta} Vir and 109 Vir. No evidence is found for variability within a season of observation. Small year to year differences are most likely due to unaccounted for extinction changes.1997A&AS..125..497Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/125/497CatalogResearchIsServedByTAP 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/114/253 : HD 11187, HD 14940, HD 15144, 20 Eri, HR 8933 (Adelman+ 1995)J/A+AS/122/249 : HD 32633, 25 Sex, HR 7224 & HD 200311 (Adelman, 1997)J/A+AS/125/65 : HD 37776, HR 2258, HR 6958 & 108 Aqr (Adelman, 1997)J/PASP/109/9 : HR 1643, Theta Aur, 49 Cam, and HR 3724 (Adelman 1997)J/A+AS/128/245 : AR Aur, 3 Hya, 49 Cnc & BX Boo (Adelman 1997)J/A+AS/133/197 : 33 Tau, HD 50169 and HR 7786 (Adelman+ 1998)J/A+AS/134/53 : HD 15980, HR 1094, 33 Gem and HD 115708 (Adelman 1999)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+AS/146/13 : 20 Eri, HR 1297, 12 CMa, and 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+AS/125/497https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/125/497http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/125/497https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/125/497https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/125/497http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/125/497GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/125/497/table2uvby Photometry of Theta VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleu(v-c)variable-comparison (v-c) u magnitudemagphot.mag;arith.difffloatu(ch-c)check-comparison (ch-c) u magnitudemagphot.mag;arith.difffloatv(v-c)variable-comparison (v-c) v magnitudemagphot.mag;arith.difffloatv(ch-c)check-comparison (ch-c) v magnitudemagphot.mag;arith.difffloatb(v-c)variable-comparison (v-c) b magnitudemagphot.mag;arith.difffloatb(ch-c)check-comparison (ch-c) b magnitudemagphot.mag;arith.difffloaty(v-c)variable-comparison (v-c) y magnitudemagphot.mag;arith.difffloaty(ch-c)check-comparison (ch-c) y magnitudemagphot.mag;arith.difffloatJ/A+AS/125/497/table2bExamination of Data on Nights for Theta VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleu(v-c)variable-comparison (v-c) u magnitudemagphot.mag;arith.difffloatu(ch-c)check-comparison (ch-c) u magnitudemagphot.mag;arith.difffloatv(v-c)variable-comparison (v-c) v magnitudemagphot.mag;arith.difffloatv(ch-c)check-comparison (ch-c) v magnitudemagphot.mag;arith.difffloatb(v-c)variable-comparison (v-c) b magnitudemagphot.mag;arith.difffloatb(ch-c)check-comparison (ch-c) b magnitudemagphot.mag;arith.difffloaty(v-c)variable-comparison (v-c) y magnitudemagphot.mag;arith.difffloaty(ch-c)check-comparison (ch-c) y magnitudemagphot.mag;arith.difffloatJ/A+AS/125/497/table3uvby Photometry of 109 VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleu(v-c)variable-comparison (v-c) u magnitudemagphot.mag;arith.difffloatu(ch-c)check-comparison (ch-c) u magnitudemagphot.mag;arith.difffloatv(v-c)variable-comparison (v-c) v magnitudemagphot.mag;arith.difffloatv(ch-c)check-comparison (ch-c) v magnitudemagphot.mag;arith.difffloatb(v-c)variable-comparison (v-c) b magnitudemagphot.mag;arith.difffloatb(ch-c)check-comparison (ch-c) b magnitudemagphot.mag;arith.difffloaty(v-c)variable-comparison (v-c) y magnitudemagphot.mag;arith.difffloaty(ch-c)check-comparison (ch-c) y magnitudemagphot.mag;arith.difffloatJ/A+AS/125/497/table3bExamination of Data on Nights for 109 VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleu(v-c)variable-comparison (v-c) u magnitudemagphot.mag;arith.difffloatu(ch-c)check-comparison (ch-c) u magnitudemagphot.mag;arith.difffloatv(v-c)variable-comparison (v-c) v magnitudemagphot.mag;arith.difffloatv(ch-c)check-comparison (ch-c) v magnitudemagphot.mag;arith.difffloatb(v-c)variable-comparison (v-c) b magnitudemagphot.mag;arith.difffloatb(ch-c)check-comparison (ch-c) b magnitudemagphot.mag;arith.difffloaty(v-c)variable-comparison (v-c) y magnitudemagphot.mag;arith.difffloaty(ch-c)check-comparison (ch-c) y magnitudemagphot.mag;arith.difffloatJ/A+AS/125/497/tableaAveraged valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharPerPeriod considered (1)time.intervalcharu(v-c)variable-comparison (v-c) u magnitudemagphot.mag;arith.difffloate_u(v-c)? rms uncertainty on (v-c) u magnitudemagstat.errorfloatnullableu(ch-c)check-comparison (ch-c) u magnitudemagphot.mag;arith.difffloate_u(ch-c)? rms uncertainty on (ch-c) u magnitudemagstat.errorfloatnullablev(v-c)variable-comparison (v-c) v magnitudemagphot.mag;arith.difffloate_v(v-c)? rms uncertainty on (v-c) v magnitudemagstat.errorfloatnullablev(ch-c)check-comparison (ch-c) v magnitudemagphot.mag;arith.difffloate_v(ch-c)? rms uncertainty on (ch-c) v magnitudemagstat.errorfloatnullableb(v-c)variable-comparison (v-c) b magnitudemagphot.mag;arith.difffloate_b(v-c)? rms uncertainty on (v-c) b magnitudemagstat.errorfloatnullableb(ch-c)check-comparison (ch-c) b magnitudemagphot.mag;arith.difffloate_b(ch-c)? rms uncertainty on (ch-c) b magnitudemagstat.errorfloatnullabley(v-c)variable-comparison (v-c) y magnitudemagphot.mag;arith.difffloate_y(v-c)? rms uncertainty on (v-c) y magnitudemagstat.errorfloatnullabley(ch-c)check-comparison (ch-c) y magnitudemagphot.mag;arith.difffloate_y(ch-c)? rms uncertainty on (ch-c) y magnitudemagstat.errorfloatnullable