We present spectroscopy of the Hα emision line in the X-ray transient V4 04 Cyg. Along with the spectroscopy, simultaneus photometry was used in order t o renormalize the spectra to agree with the photometry, giving us spectrophotom etric data. We have found evidence to show the presence of flares in both the l ine and continuum on a time-scale

We present a test for the degree of symmetry in the distribution of the Hα brightness along the arms of a sample of spiral galaxies. The test consists of deriving the cross-correlation function of the Hα brightness as a function of curvilinear distance along pairs of opposed arms, after unfolding the arms geometrically. Our results reveal a

En esta memoria se aplican técnicas astrosismológicas a ocho estrellas delta Scuti, en diferentes estados evolutivos y pertenecientes al cúmulo del Pesebre para obtener sus modos propios de oscilación y, a partir de ellos, obtener información tanto sobre la estructura de las estrellas particulare, como sobre las características generales del cúmulo

We present evidences of extended line-emission in the quadruple system Q2237+0305. Using 2D spectroscopy obtained with the fiber based system INTEGRAL in subarcsecond seeing conditions, we have derived intensity maps for the continuum and the emission in the CIII]lambda1909 line. The continuum maps show four distinct compact sources which agree in

We present initial results from a water-vapour monitoring campaign initiated in 1996. A certain amount of caution must still be applied to the interpretation of the water-vapour statistics as a large majority of the data have been taken in summer, or autumn. Continued monitoring is accumulating strong evidence of a seasonal effect, with typically

The velocity field of the nearly face-on galaxy NGC 3631 is derived from observations in the Hα line on the 6-m telescope of the Special Astrophysical Observatory. These optical data are compared with radio observations of this galaxy (Knapen 1997). It is argued that the two-armed spiral structure of NGC 3631 has a wave nature, and that the