An astrometric catalogue for the area of Coma Berenices A catalogue of stellar positions and proper motions down to the 14thphotographic magnitude in the area of the open cluster in Coma Berenicesis compiled from data of 12 different sources. The accuracy of theproper motion data is comparable to that of the Hipparcos Catalogue. Thecatalogue Table 5 is only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue. We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.
The QSO 1156+295 - A multifrequency study of recent activity Photometric observations are presented for outbursts of thequasi-stellar object QSO 1156+295 in 1981 and 1982. High time resolutionphotometry is included showing variations on time scales of weeks toabout half an hour. Data from early plate material show that the objectmay have been quite bright at the beginning of this century but wasquite faint and probably inactive between about 1950 and the beginningof recent activity in 1977-1979. Some results of optical linearpolarization are discussed. In examining spectrophotometric results,broadband spectra show very little change in spectral shape duringchanges in continuum brightness. High resolution spectra (0.1-A FWHM)show no evidence for the Mg II 2798-A absorption sometimes seen inoptically violent variables and other QSOs. The radio flux densityvariations at several frequencies are documented and discussed andcompared with the optical light curve. Models for 1156+295 are discussedincluding variability time scales, and the observed energy output iscompared with a magnetic accretion disk model proposed by Shields andWheeler (1976). Results are summarized and the different sizes of activeand inactive regions of the object are compared.
