UBVRI photometry of EUV stellar sources

We present the results of high-precision UBV(RI)c photometric observations and of spectroscopic radial velocity measurements obtained at the European Southern Observatory for a sample of 51 cool stars detected in the EUV by the ROSAT Wide Field Camera (WFC). Using also recent results from HIPPARCOS, we infer spectral types and investigate the single or binary nature of the sample stars. Optical variability, with periods in the 0.4-13 day range, has been detected for the first time in 15 of these stars.

Cone search capability for table J/A+AS/138/87/table1 (UBVRI maximum luminosity and colors)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+AS/138/87
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/138/87
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/138/87
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+AS/138/87
Provenance
Creator Cutispoto G.; Pastori L.; Tagliaferri G.; Messina S.; Pallavicini R.,Rodono M.
Publisher CDS
Publication Year 1999
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Exoplanet Astronomy; Natural Sciences; Observational Astronomy; Physics