(\object{HD 93161}) %R 1996A&AS..118....1L %J-5 %A Lu L., Manrique W.T., Perdomo R., Podesta R.C., Wang Z., Actis E.L., Zeng F., Zeng Z. , Alonso E., Serafino A., Zhao G. , Hormaechea J. %T First catalogue of stars with the photoelectric astrolabe in San Juan. %F 1996.06.21 %B On the basis of data observed in San Juan of Argentina with the photoelectric astrolabe mark II (PA II) of Beijing Astronomical Observatory from 23 Feb., 1992 to 28 Feb., 1995, residuals of 7200 stars are reduced from about 230000 observations of stars. The mean precision of the residuals is +/-0.046". Using the data, the first catalogue of stars (CPASJ1) has been compiled. There are 2980 stars in this catalogue, including 989 FK5/FK4 Supp stars, 658 FK5 Ext stars, 387 SRS stars, 687 CAMC4 stars, 192 GC stars, and 72 Hipparcos stars. The mean precisions are +/-3.2ms and +/-0.061" in right ascension and declination, respectively. The magnitudes of stars are from 2.0 to 11.3. The declinations are from -3deg to -60deg. The mean epoch is 1993.6. Finally, systematic corrections of (CPASJ1-FK5) are given. %K catalogue - astrometry - reference system %R 1996A&AS..118....7V %J-34 %A Vitores A.G., Zamorano J., Rego M., Alonso O., Gallego J. %T Photometric and morphological analysis of UCM galaxies. I. Observations and reductions. Morphological classifications. %F 1996.06.21 %B We present the results of Thuan & Gunn r CCD imaging observations of the Universidad Complutense de Madrid (UCM) sample of emission-line galaxies (ELGs), selected by the presence of H{alpha} emission in low-resolution objective prism spectra. In this work we characterize photometrically and morphologically a total of 212 objects from the UCM survey. This Paper presents the observations and basic reductions, and lists a set of photometric parameters calculated for each UCM object. In addition, for the first time in a ELGs sample, we have determined the morphological classification of the objects using simultaneously five different criteria. %K surveys - galaxies: fundamental parameters - galaxies: general - galaxies: photometry - atlases %R 1996A&AS..118...35B %J-46 %A Bumba V., Klvana M., Kalman B. %T Doppler and proper motions accompanying formation of an additional magnetic flux in the mature solar active region (NOAA 7216). %F 1996.06.21 %B We document the evolution of an additional magnetic flux in the photosphere of a fully developed sunspot group, we measure longitudinal magnetic field, line-of-sight motions, and proper motions of sunspots in the group during this process. We demonstrate the close correlation of magnetic field, Doppler and proper motion singularities with the area in which additional magnetic flux appears and the new penumbrae and umbrae develop. We discuss the probable reasons for this fact and for the region's weak flare activity. There exist in the group about eight sunspots with the Evershed effect, differing in form, in dependence on the history of development of the spot in which it is observed. %K Sun: sunspots - Sun: magnetic field - Sun: doppler motions %R 1996A&AS..118...47C %J-57 %A Chini R., Kruegel E., Lemke R. %T Dust and CO emission in normal spirals. I. The data. %F 1996.06.21 %B We present 1300{mu}m continuum observations and measurements of the CO (1-0) and (2-1) emission from the inner regions of 98 normal galaxies. The spatial resolution ranges from 11" to 45". The sources come from a complete FIR selected sample of 138 inactive spirals with an optical diameter D_25_<=180". %K galaxies: abundances - galaxies: interstellar matter - galaxies: spiral - radio continuum: galaxies - radio lines: galaxies %R 1996A&AS..118...59J %J-64 %A Jaschek C., Valbousquet A., Ochsenbein F. %T The method of the galactic rotation distances. %F 1996.06.21 %B The method of galactic rotation distances is investigated by means of numerical simulations and found to work properly, even when the dispersion of the absolute magnitudes or the peculiar velocity dispersion are large. We apply the method to a large sample of more than 600 galactic supergiants and bright giants. We derive average mean absolute magnitudes which confirm the average absolute magnitudes found by either Blaauw or Schmidt-Kaler. Our calibration has the advantage to be based upon both a single method and a large number of stars. We show that the method works properly only with large samples.Therefore no subdivisions according to spectral types can be derived. We show further that the method is stable in the sense that small variations in the input parameters produce only small changes in the results. %K stars distances - methods: numerical - methods: statistical - stars: fundamental parameters %R 1996A&AS..118...65B %J-87 %A Belloni P., Roeser H.-J. %T Galaxy population in distant galaxy clusters. I. Cl 0939+472 (z=0.41) and Cl 0016+161 (z=0.54). %F 1996.06.21 %B We present results of a study of the galaxy population of Cl 0939+472 (z=0.41) and Cl 0016+161 (z=0.54). We have used narrow-band filters (FWHM=~90-200A) and broad band B, R, I filters covering the range from 3800A to 9200A obtain low resolution spectra for all galaxies brighter than R=22.5mag in a 5'x5' (Cl 0939+472) and a 3.5'x5' (Cl 0016+161) field. Template spectra for classical Hubble type and E+A galaxies were fitted to the low-resolution spectral energy distribution in order to determine the galaxies' redshift and the morphological type. We detected 160 cluster members in Cl 0939+472 and 100 in Cl 0016+161, with a success rate of about 80% in the determination of redshifts and corresponding classification of morphological types from spectral energy distributions. These results constitute a statistical improvement of at least a factor of 4 over the most complete study to date of these clusters. In particular, we provide a large sample of elliptical galaxies with secure membership, well suited for a study of evolutionary effects. The same E+A templates developed for the analysis of Cl 0939+472 were successful in recognizing almost all of the spectroscopically already known E+A galaxies in Cl 0016+161 and in identifying 10 new ones. Our results show that in this cluster, too, the fraction of E+A galaxies represents about 20% of the total galaxy population. This outlines the importance of taking into account galaxies with signs of recent star formation for a correct evaluation of the Butcher-Oemler effect in distant galaxy clusters. %K galaxies: clusters: individual: Cl 0939+472 (\object{ClG 0939+4713}) , Cl 0016+161 (\object{ClG 0016+1609}) - galaxies: clusters; redshifts; evolution %R 1996A&AS..118...89B %J-103 %A Bonatto C., Bica E., Pastoriza M.G., Alloin D. %T Ultraviolet properties of early-type galaxies. %F 1996.06.21 %B We analyse the UV properties of early-type galaxies from their UV spectra in the IUE library, including both normal and active nuclei. We co-added the spectra, and hence the objects into groups of similar spectral properties in the UV, also taking into account their properties in the visible/near-infrared ranges. Although, owing to the presence of a residual fixed pattern noise, IUE data cannot be improved by co-addition as expected for spectra containing only random noise, this procedure still provided spectra of higher signal/noise ratio than in previous studies, often based on individual spectra and therefrom derived colour indices. Thanks to the co-adding procedure, information on spectral features can now be assessed. The red stellar population groups exhibit a far-UV flux at different levels. The higher ones denote the presence of the UV turnup, which possibly exhibits absorption features, at least as detected through the IUE aperture. As to the blue stellar population groups and/or AGNs, we have carried out simple syntheses with UV star cluster templates and galaxy spectra in order to infer the properties such as burst ages and contamination by an active nucleus. It has been possible to derive information on the extinction law affecting some internally reddened galaxies; there are cases where the presence of the {lambda}2200 A absorption feature suggests a reddening law similar to the Galactic one, and others without the {lambda}2200A feature, suggesting that it is rather an SMC type law which applies, then. %K (ISM:) dust, extinction - galaxies: active - galaxies: elliptical and lenticular, cD - galaxies: general - galaxies: stellar content - ultraviolet: galaxies %R 1996A&AS..118..105R %J-110 %A Ryl'kov V.P., Dement'eva A.A., Alksnis A., Straume J.I. %T Photographic observations of Pluto 1991-1994 with the Baldone Schmidt telescope. %F 1996.06.21 %B 55 photographic positions of the Pluto for 1991-1994 are presented. The observations were carried out by Latvian astronomers using the 80/120/240 cm Schmidt telescope at Baldone near Riga. 34 plates were reduced by using the 12-21 reference stars from catalogue of southern stars FOCAT-S, created at Pulkovo. The mean reduction errors vary from 0.23" to 0.34" for both coordinates. The obtained Pluto positions were compared with the ephemeris JPL DE200. The increase of the mean (O-C) residuals in RA, already noticed in previous works by the Pulkovo authors, is confirmed. In 1994 the (O-C) residuals with respect DE200 have reached 2.32"+/-0.07" in RA and -0.74"+/- 0.07" in Dec. %K astrometry - planets and satellites: individual: \objnS{Pluto} %R 1996A&AS..118..111H %J-155 %A Heraudeau P., Simien F. %T Optical and I-band surface photometry of spiral galaxies. I. The data. %F 1996.06.21 %B We present V- and I-band CCD surface photometry on 234 inclined Sa-Sd galaxies, completed by similar data in B and R for a reduced subsample. In this first paper of a series, the reduction of the data is discussed, and several comparisons are made with other recent works. Radial profiles are presented for the surface brightness and the characteristics of ellipses fitted to isophotes; global, effective, and isophotal parameters are listed. All the results are available in electronic form. %K galaxies: spiral; galaxies: photometry %R 1996A&AS..118..157K %J-162 %A Kisielius R., Berrington K.A., Norrington P.H. %T Atomic data from the IRON Project. XV. Electron excitation of the fine-structure transitions in hydrogen-like ions He II and Fe XXVI. %F 1996.06.21 %B Electron excitation collision strengths for fine-structure transitions involving relativistic levels with principal quantum number n=1,2,3,4 in hydrogen-like ions He II and Fe XXVI are calculated using R-matrix techniques. The model target ion includes all 25 energy levels with n<=5. Low-energy collision strengths dominated by autoionizing resonances are averaged over a Maxwellian velocity distribution to obtain effective collision strengths as a function of electron temperature. In the case of He II, such resonances enhance the collision strength by up to a factor of 3 over earlier calculations for excitation of the n=4 levels due to the presence of 5ln'l' doubly-excited states near the n=4 thresholds. For He II, the data are presented at four temperature points ranging from logT(K)=3.2 to 4.3, and for Fe XXVI from logT(K)=6.0 to 7.5. %K atomic data %R 1996A&AS..118..163U %J-167 %A Urban S.E., Martin J.C., Jackson E.S., Corbin T.E. %T New reductions of the Astrographic Catalogue. Plate adjustments of the Algiers, Oxford I and II, and Vatican Zones. %F 1996.06.21 %B The U. S. Naval Observatory is in the process of making new reductions of the Astrographic Catalogue using a modern reference catalog, the ACRS, and new data analysis and reduction software. Currently ten AC zones have been reduced. This papers discusses the reduction models and results from the Algiers, Oxford I and II, and Vatican zones (those of the Cape zone are discussed elsewhere). The resulting star positions will be combined with those of the U.S. Naval Observatory's Twin Astrograph Catalog to produce a catalog of positions and proper motions in support of the Sloan Digital Sky Survey. %K catalogs - astrometry - reference systems - surveys - methods: data analysis %R 1996A&AS..118..169M %J-179 %A Molodij G., Rayrole J., Madec P.Y., Colson F. %T Performance analysis for T.H.E.M.I.S* image stabilizer optical system. I. (*)Telescope Heliographique pour l'Etude du Magnetisme et des Instabilites de l'atmosphere Solaire. %F 1996.06.21 %B This paper describes the performance of the optical image stabilizer system developed for the franco-Italian T.H.E.M.I.S. telescope, which is currently being built on the Canary Island Tenerife. T.H.E.M.I.S will be one of the largest solar telescopes, and will be the first to be manufactured with a real time tip-tilt correction system integrated into its optical train. A new method is described here for measuring image motions. This method is called granulation tracking. It is based on Fourier transform analysis. A servo-loop model is also proposed, based on experimental measurements and the known time properties of atmospheric turbulence, to deduce the image quality obtained after correction. Method sensitivity and accuracy under various terrestrial turbulence conditions are discussed. %K telescopes instrumentation: miscellaneous - atmospheric effects - adaptive - sun: granulation %R 1996A&AS..118..181C %J-189 %A Chen B. %T A non-parameter global method of interpreting star count data. %F 1996.06.21 %B Galactic structure studies involve the manipulation of star catalogues and their global comparison with sophisticated synthesis models. In this paper, we present a detailed multivariate star count analysis algorithm. By combining the photometric and kinematic information, it performs a global analysis of the multivariate star counts including magnitude, colours, and proper motions. The method allows us to constrain galactic structure parameters and derive the relative densities of different components and populations in the Galaxy. Monte Carlo simulations have been carried out to demonstrate the viability of the method. A simple example of application to real star count data is given. We found the asymmetric drift of the thick disk to be 80+/-10km/s at a 3sigma level. Detailed investigations from a complete survey of several galactic directions are in preparation. %K methods: data analysis - methods: statistical - Galaxy: structure - Galaxy: stellar content