Physics
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat..41380087c&link_type=abstract
VizieR On-line Data Catalog: J/A+AS/138/87. Originally published in: 1999A&AS..138...87C
Physics
Radio Sources, Ultraviolet, Photometry: Ubvri, Radial Velocities
Scientific paper
We present the results of high-precision UBV(RI)c photo 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. (8 data files).
Cutispoto Giuseppe
Messina Sergio
Pallavicini Roberto
Pastori Livio
Rodono' Marcello
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