J/A+AS/114/253ivo://CDS.VizieR/J/A+AS/114/253CDSAdelman S.J.Boyce P.W.2017-06-30T05:49:29Z2003-11-03T12:22:28ZCDS support team

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

cds-question@unistra.frvisible-astronomymedium-band-photometryFour College Automated Photoelectric Telescope differential Stroemgren uvby photometric observations of four magnetic chemically peculiar stars are presented. One of our comparison stars was also found to be variable. Observations of the sharp-lined Si star HD 11187 are best described as representing a constant star. HD 15144 was also constant photometrically. However, its comparison star HD 14940 is definitely variable. But we were not able to find a period. It may be a {delta} Scu star. Our observations of 20 Eri and the uvby values of Renson & Manfroid show definite differences in the shapes of the light curve which suggest that this star may be undergoing a precession of its rotational axis. When we refined the period by using the minima we find a value of 1.92893 days. We refined Winzer's period of the relatively large amplitude variable HR 8933 to 2.86031 days. In v and b there are definite indications of a weak submaximum within the broad minimum.1995A&AS..114..253Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/114/253CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/103/1 : 63 And, HD 192913, HR 8240 & 108 AqrJ/A+AS/106/333 : Alpha And, HD 184905, HR 8216 & HR 8434J/A+AS/122/249 : HD 32633, 25 Sex, HR 7224 & HD 200311J/PASP/109/9 : HR 1643, Theta Aur, 49 Cam, and HR 3724J/A+AS/125/65 : HD 37776, HR 2258, HR 6958 & 108 AqrJ/A+AS/125/497 : Theta Vir and 109 VirJ/A+AS/133/197 : 33 Tau, HD 50169 and HR 7786J/A+AS/134/53 : HD 15980, HR 1094, 33 Gem and HD 115708J/A+AS/136/111 : HD 35298, 19 Lyr, HD 192678 and HR 8216J/A+AS/136/379 : 45 Leo, HR 4330, 49 Her and HR 6718J/A+AS/146/13 : 20 Eri, HR 1297, 12 CMa, and HD 134214J/A+A/368/225 : HR 5341, HD 142070, HR 6967 & HR 8434J/A+A/390/1023 : HR 194, HD 32966, HD 171782, and HR 7911J/A+A/401/357 : 60 Tau, HR 1528, HR 8216, HR 8770https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/114/253https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/114/253http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/114/253https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/114/253https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/114/253http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/114/253GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/114/253/table1uvby HD 11187 Photometry (c=HD11335, ch=HD12303)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDHeliocentric Julian Datedtime.epochdoubleumag1v-c variable-comparisonmagphot.mag;arith.difffloatumag2ch-c check-comparisonmagphot.mag;arith.difffloatvmag1v-c variable-comparisonmagphot.mag;arith.difffloatvmag2ch-c check-comparisonmagphot.mag;arith.difffloatbmag1v-c variable-comparisonmagphot.mag;arith.difffloatbmag2ch-c check-comparisonmagphot.mag;arith.difffloatymag1v-c variable-comparisonmagphot.mag;arith.difffloatymag2ch-c check-comparisonmagphot.mag;arith.difffloatJ/A+AS/114/253/table3uvby HD 15144 and HD 14940 (ch=HD15130)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDHeliocentric Julian Datedtime.epochdoubleumag1v-ch variable-checkmagphot.mag;arith.difffloatumag2v-c variable-comparisonmagphot.mag;arith.difffloatvmag1v-ch variable-checkmagphot.mag;arith.difffloatvmag2v-c variable-comparisonmagphot.mag;arith.difffloatbmag1v-ch variable-checkmagphot.mag;arith.difffloatbmag2v-c variable-comparisonmagphot.mag;arith.difffloatymag1v-ch variable-checkmagphot.mag;arith.difffloatymag2v-c variable-comparisonmagphot.mag;arith.difffloatJ/A+AS/114/253/table4uvby 20 Eri Photometry (c=HD23055, ch=HD22203)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDHeliocentric Julian Datedtime.epochdoubleumag1v-c variable-comparisonmagphot.mag;arith.difffloatumag2ch-c check-comparisonmagphot.mag;arith.difffloatvmag1v-c variable-comparisonmagphot.mag;arith.difffloatvmag2ch-c check-comparisonmagphot.mag;arith.difffloatbmag1v-c variable-comparisonmagphot.mag;arith.difffloatbmag2ch-c check-comparisonmagphot.mag;arith.difffloatymag1v-c variable-comparisonmagphot.mag;arith.difffloatymag2ch-c check-comparisonmagphot.mag;arith.difffloatJ/A+AS/114/253/table5uvby HR 8933 Photometry (c=HD220933, ch=HD221673)umag1v-c variable-comparisonmagphot.mag;arith.difffloatumag2ch-c check-comparisonmagphot.mag;arith.difffloatvmag1v-c variable-comparisonmagphot.mag;arith.difffloatvmag2ch-c check-comparisonmagphot.mag;arith.difffloatbmag1v-c variable-comparisonmagphot.mag;arith.difffloatbmag2ch-c check-comparisonmagphot.mag;arith.difffloatymag1v-c variable-comparisonmagphot.mag;arith.difffloatymag2ch-c check-comparisonmagphot.mag;arith.difffloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDHeliocentric Julian Datedtime.epochdouble