[en] Spectroscopic observations have been made with the Anglo-Australian Telescope of 31 objects selected as compact galaxies from UK Schmidt Telescope plates. Three of the objects were shown to be galactic stars superimposed on distant galaxies; finding charts for the remaining 28 are given. The galaxies belong to the same population as Zwicky's compact galaxies but lie at nearly twice the distance. There is no evidence for a population of local but more compact galaxies. The discovery is reported of a compact galaxy which may have broad [Fe VII] emission and of another with a type I Seyfert spectrum. (author)

[en] Seventy galaxies with strong emission lines have been found. They include three Seyfert 1 galaxies, five Seyfert 2 galaxies and eleven near-Seyfert galaxies. (author)

No abstract available

[en] A new fluorescent tetra-stilbene compound, 1,4-bis-dodecyloxy-2,5-bis-(2-{4-[2-(4-methanesulfonyl-phenyl)-vinyl]-phenyl}-vinyl)-benzene (BDSSTS) derived from Heck chemistry was successfully synthesized. The Pd-catalyzed Heck reaction was used as the key synthetic stage to couple styrene unites with aryl halides. The BDSSTS material is an acceptor-pi-acceptor (A-pi-A) conjugated system with alkoxy chain in central and sulfonyl groups in terminals of the molecule. The BDSSTS compound showed UV–vis absorption in the range of 423–426 nm with high molar extinction coefficients (ε = 1.9–9.1 × 10⁴ M⁻¹.cm⁻¹) in tested solvents. This new fluorescent compound emits in the yellow region of the visible spectrum (500–525 nm) with Stokes shifts of 3641–4429 cm⁻¹. The geometry optimization calculations were performed with the use of DFT method applying B3LYP functional and 6–311++G (d, p) basis set. Low total Lewis and HOMO-LUMO gap are followed by significant charge transfers, absorption, and emission in the BDSSTS structure.

[en] During the last four years (1978-1981), some close binaries of W Ursae Majoris type have been observed from the National Observatory of Athens. In all cases a two-beam, multi-mode, nebular-stellar photometer has been used, attached to the 48-inch Cassegrain reflector at the Kryonerion Station. The observed systems are: 44i Boo, VW Cep, AB And, BV Dra, BW Dra, U Peg, V508 Oph. Especially VW Cep and 44i Boo, are very interesting objects; in addition to the light curves that have already been published (Rovithis and Rovithis-Livaniou, 1980-1981), other observations were obtained during the last year and are now at computational stage. The observations of these two systems will be continued during the next years. (Auth.)

[en] The optogalvanic spectrum of Ne in the spectral region 415-545 nm has been reinvestigated. Four new Rydberg series of lines involving the 3p(3/2)_1,2 and 3p(5/2)₂ states as the lower state have been detected. These are in addition to the usual series of lines observed earlier [Kumar Manoj et al. (1997)]. All these new lines involve one photon excitation and permit identification of d-levels up to n = 32. This last level is within 100 cm^-1 of the reported ionization limit. (orig.)

[en] Absorbance spectra are reported for selected diatomic combinations (Li₂, Na₂, LiAl, ...) of atomic metal vapors (Li, Na, Al) in support of transmission measurements made in a high-temperature (T ∼ 1,600 to 1,800 degrees K) flow apparatus. The computational model adopted for interpretation of measured data incorporates Voigt lineshapes and rovibronic positions and transition strengths derived from previous spectral measurements or from ab initio potential curves and transition dipole moment functions. Particular attention is addressed to comparison of the calculated high-resolution spectra obtained from state-specific transition intensities with corresponding Franck-Condon approximations and with measurements in Li/Li₂ and Na/Na₂ vapors. Comments are provided on diagnostic characterization of spatial anisotropies in the flow apparatus employed in these cases, and on detection of previously unobserved metal diatomics

[en] Confirmation is reported of an optically selected QSO candidate at a redshift of 3.45. The validity of a systematic procedure for discovering QSOs with redshift up to 4.7 is thereby further demonstrated. (author)

[en] A thorough knowledge of the spectral emission characteristics of the inductively coupled plasma is a prerequisite for its maximum utilization in atomic emission spectroscopy. Toward this end on Atlas of Spectral Information for Inductively Coupled Plasma, Atomic Emission Spectroscopy has been assembled to provide the analyst with the basic information concerning the analytical capabilities and the potential spectral interferences of the prominent spectral lines of 70 elements. The Atlas contains 232 wavelength scans of 70 elements covering the range of 189 to 517 nm (189 to 597 nm for sodium and the reference blank).. The Atlas also contains a listing of 973 prominent lines with estimated detection limits and a detailed collection of coincidence profiles for 281 of the most prominent lines, each with profiles of ten of the most prevalent concomitant elements superimposed. This paper contains a survey of the spectral information contained in the Atlas

[en] Observations of the 6196.0 A diffuse feature in a number of directions toward moderately and little reddened stars have been made at high spectral resolution and signal-to-noise ratio. We find that the 6196.0 A feature is frequently a symmetric feature as narrow as 0.4 A FWHM, while in some stars it is much broader, apparently due to blending in several clouds in the line of sight. While no fine structure is apparent in the 6196.0 A feature, a new, equally narrow feature was found at 6194.6 A. The feature at 6202.6 A is seen to be highly asymmetric, and the entire region is apparently underlain with weaker features than those reported