We have analyzed the optical spectra of 67 symbiotic stars and objects suspected of being symbiotic, and found 18 new symbiotic systems. This is the largest homogeneous set of optical spectrophotometric data for symbiotic binaries ever studied. We have derived the reddenings and distances for all systems, estimated the IR classes (S and D) for the new systems, and determined the location of the hot components in the Hertzsprung-Russell diagram.
Spectral energy distributions were photoelectrically measured from 320 to 860 nm with a resolution of 1 nm in equidistant steps of 1 nm for 60 bright southern and equatorial stars of intermediate and late spectral types for all luminosity classes. Flux curves for individual stars are plotted with a resolution of 1 nm and tabulated in steps of 5 nm. Typical internal mean errors of fluxes measured in different nights are less than 0.02mag in the spectral range from 400 nm to 860 nm, and rise to a maximum of about 0.05mag for wavelengths below 400 nm.
The present catalogue contains 2238 energy distribution data for 1588 objects in the spectral region 320-817nm by steps of 2.5nm. It is based on the following spectrophotometric catalogues: Kharitonov et al. (1), Alekseev et al. (the "Chilean Catalogue") (2), Willstrop (3), Glushneva et al. (the "Moscow Catalogue") (4,5,6), Burnashev's observations of stars obtained at the Crimean Astrophysical Observatory. Comparison of these catalogues and their reductions to the uniform spectrophotometric system has been carried out by Burnashev (7). The catalogue is divided in three parts: 1) Part 1 contains the data published in the catalogues by Kharitonov (1), Glushneva (4,5,6) and Willstrop(3). 2) Part 2 contains the data (and their r.m.s) of the "Chilean Catalogue" (Alekseev et al.(2)) and Burnashev's observations of some stars, obtained at the Crimean Astrophysical Observatory during 1974-1982. The observations of some variables, obtained in Chile, Are also presented. This part contains also tables of the Hydrogen continuum radiation for several temperatures (5000; 10000;15000;20000;40000;80000 K) according to Boyarchuk et al.(9), which may be useful for the analysis of the spectra of some variables. 3) Part 3 contains data of Parts 1 and 2 reduced to the uniform spectrophotometric system of the "Chilean Catalogue" in the range 320-735nm. The absolute calibration based on energy distribution of the primary standard Alpha Lyrae, according to Kharitonov (10), being the mean of the absolute calibrations of Kharitonov et al.(11), Hayes and Latham (12), Tug et al.(13).
New spectrophotometric data for 3 galactic and 23 LMC F to G supergiants are presented. The wavelength range of the spectra is 3400 to 6400{AA}, the resolution about 10{AA}. The mean transformational error of the fluxes is 0.03mag. The S/N ratio is about 100 and 30 for galactic and LMC stars, respectively. Details about the reduction one may found in Oestreicher & Schmidt-Kaler (1998MNRAS.299..625O) and Malyuto et al. (1997MNRAS.286..500M). The fluxes are given in magnitudes according to the system of Hayes & Latham (1975ApJ...197..593H). For each star an ASCII file is given with the name of the first identifier. In the first column the wavelength, in the second column the flux is given.
We present echelle spectrophotometry of the Galactic H II region S311. The data have been taken with the Very Large Telescope Ultraviolet-Visual Echelle Spectrograph in the 3100-10400{AA} range. We have measured the intensities of 263 emission lines; 178 are permitted lines of H^0^, D^0^ (deuterium), He^0^, C^0^, C^+^, N^0^, N^+^, O^0^, O^+^, S^+^, Si^0^, Si^+^, Ar^0^ and Fe^0^; some of them are produced by recombination and others mainly by fluorescence.
The results of visual and near-infrared spectrophotometric observations for 77 variable stars obtained during 1971-1991 in Chile, Armenia and Bolivia. The quasi-monochromatic extra-atmospheric fluxes from the stars are given in absolute energy units (W/m^2^/m) at all wavelengths of the spectral range at 2.5 nm intervals.
The catalog contains spectrophotometry at approximately 10-Angstrom resolution for 173 southern Wolf-Rayet stars. All observations were made at the Cerro Tololo Inter-American Observatory between November 1981 and February 1985 with SIT-vidicon detector. The catalog includes synthetic photometry, and fluxes in the range 3400-7300 Angstroms for most known Wolf-Rayet stars in the Large Magellanic Cloud and in the range 3400-4700 Angstroms for all known Wolf-Rayet stars in the Small Magellanic Cloud.
Physical conditions inside a supernova remnant can vary significantly between different positions. However, typical observational data of supernova remnants are integrated data or contemplate specific portions of the remnant. We study the spatial variation in the physical properties of the N49 supernova remnant based on a spectroscopic mapping of the whole nebula. Long-slit spectra were obtained with the slit (~4'x1.03") aligned along the east-west direction from 29 different positions spaced by 2" in declination. A total of 3248 1D spectra were extracted from sections of 2" of the 2D spectra. More than 60 emission lines in the range 3550{AA} to 8920{AA} were measured in these spectra. Maps of the fluxes and of intensity ratios of these emission lines were built with a spatial resolution of 2"x2".
The results of spectrophotometric observations of 64 southern stars in the range from 320 to 730nm are presented as quasi-monochromatic luminosities from the stars on the external board of atmosphere expressed in the absolute energy units (W/m^2^/m) with spectral interval of 2.5nm.
Based on echelle spectra obtained at the prime focus of the 6-m telescope, the detailed chemical composition of one of the components of the bipolar nebula identified with the intense infrared source AFGL 2688 was determined by the model-atmosphere method.
