J/A+AS/132/361ivo://CDS.VizieR/J/A+AS/132/361CDSRaiteri C.M.Villata M.De Francesco G.Lanteri L.Cavallone M.,Sobrito G.2017-12-07T07:27:52Z1998-11-13T19:36:56ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsapparent-magnitudeOptical data in the Johnson's BV and Cousins' R bands are presented for eight X-ray selected BL Lacertae objects that have recently been pointed by the Satellite per Astronomia X `Beppo'(BeppoSAX). The observations were done with the 1.05m telescope of the Torino Astronomical Observatory and the observational periods include, or are close to, the satellite pointings. These data provide optical information on sources that have been rarely observed in the optical band. Moreover, they can be compared to the X-ray ones for a better understanding of the emission properties of these objects. Variability on short time scales (a few days) was found for MS 0317.0+1834, 1ES 0347-121, and MS 0737.9+7441. For a description of the (RI)c photometric system, see e.g. the General Catalog of Photometric Data <GCPD/54>1998A&AS..132..361Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/132/361CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/116/403 : RI photometry of stars in 12 BL Lac objects (Fiorucci+, 1996)J/A+AS/144/481 : BVRI photometry of five BL Lacs (Villata+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/132/361https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/132/361http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/132/361https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/132/361https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/132/361http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/132/361GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/132/361/mean (Observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/132/361/mean?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/132/361/mean?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/132/361/mean?GETtext/xml+votable180.050000true30.2754170.5666670.0055555555555555566/398 3431 7548 8067 11682 17820 23134 36342https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/132/361?format=asciiOpticaldefaultJ/A+AS/132/361/meanObservationsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBLLacSource designationmeta.id;meta.maincharprimaryRAJ2000Right ascension (J2000.0) (from table1)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0) (from table1)pos.eq.dec;meta.mainBand[VRB] Bandmeta.code;instr.filtercharDate1Observation date (beginning)time.epoch;obsnullableDate2Observation date (end)time.epoch;obsnullablemagmin? Minimum magnitudemagphot.magfloatnullablemagmax? Maximum magnitudemagphot.magfloatnullableNobs[1/21] Number of observationsmeta.numberintLCplot of the light curvemeta.ref.urlcharJ/A+AS/132/361/tab2-9BVR observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBLLacSource designationmeta.id;meta.maincharHJDHeliocentric Julian datedtime.epochdoubleBand[VRB] Bandmeta.code;instr.filtercharmagMagnitude in the band Bandmagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloat