New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.
|
Mesures de vitesses radiales. VIII. Accompagnement AU sol DU programme d'observation DU satellite HIPPARCOS
We publish 1879 radial velocities of stars distributed in 105 fields of4^{\circ} \times 4^{\circ}. We continue the PPO series \cite[(Fehrenbachet al. 1987;]{Feh87} \cite[Duflot et al. 1990, 1992 and 1995),]{Du90}using the Fehrenbach objective prism method. Table 1 only available inelectronic form at CDS via to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
|
Longterm Photometry of Variables at ESO - Part Two - the Second Data Catalogue 1986-1990
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1993A&AS..102...79S&db_key=AST
|
Long-term photometry of variables at ESO. I - The first data catalogue (1982-1986)
This paper presents the catalog of photometric data in the Stromgrensystem obtained during the first four years (October 1982 - September1986) of the Long-Term Photometry of Variables (LTPV) program at ESO.The data are available in computer-readable form.
|
Photometry of symbiotic stars - an international campaign.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1991CoSka..21..303H&db_key=AST
|
UBV Photometry of the 1985 Eclipse of 22 Vulpeculae
Not Available
|
Optical variability of PU Vulpeculae (Kuwano's nova-like object 1979) in 1979-1982
The variable star PU Vul, discovered by Kuwano in 1979, is characterizedon the basis of published IR and spectral observations and of UBVphotoelectric observations obtained with a Zeiss 60-cm reflector at theCrimean station of the Shternberg State Astronomical Institute during1979-1982. The data are presented in tables and graphs, and the deepfading observed in 1980-1981, after the 'outburst' of 1977-1979, isdescribed in detail. A binary-system model is proposed to explain theobserved behavior of the star, with discussion of the probable nature ofthe components, the evolution of the hot component and the gas shell, ofthe cool component, and the mechanism of the fading. It is alsoconsidered possible that PU Vul is a single star, but not one of FU Oritype.
|
Spectral Classifications of some Emission B Stars
Not Available
|
