We present spectroscopic observations of supernova 1994D in NGC 4526, an S0_3_ galaxy in the Virgo cluster 15Mpc distant. The datasets consist of the interstellar Ca II and Na I lines towards the supernova at high spectral resolution (FWHM 6km/s), H α and [N II] observations at lower resolution (FWHM 33km/s) of the nucleus of NGC 4526 and the

Not Available

We investigate the formation and the nature of the extended wings of the UV resonance lines of Si IV 1394, 1402A and C IV 1548 and 1550A in the spectrum of the LBV P Cyg. The effects of line blending in the neighbourhood of these lines were estimated by means of a grid of theoretical synthetic spectra, computed for the P Cyg model atmosphere. It is

We have compared the Tenerife data with the COBE Differential Microwave Radiometer (DMR) 2 year data in the declination +40° region of the sky observed by the Tenerife experiment. Using the Galactic plane signal at ˜30 GHz, we show that the two data sets are cross-calibrated to within 5%. The high Galactic latitude data were investigated for the

Not Available

We report on the discovery of 15 new weak-line T Tauri stars (wTTS) south of the Taurus molecular clouds based on the large database produced by the ROSAT All-Sky Survey. High-resolution spectroscopy of 109 optical counterparts of X-ray sources has been performed to measure their radial velocities in order to verify kinematic membership to the