We report the results of a multisite observing campaign of observations of OJ287 in the visible, near infrared and submillimetric in Winter 1989-90. Simultaneous UBVRIK and white light data were obtained with three telescopes in Tenerife and La Palma on three nights in December-January, supported by follow-up observations in January and March 1990

EL OBJETIVO DE ESTA TESIS ES EL ESTUDIO DE LA FUENTE DE RAYOS X V404 CYGNI. EN ELLA SE PRESENTA UNA IMPORTANTE BASE DE DATOS, PRINCIPALMENTE ESPECTROSCOPIA DE ALTA RESOLUCION EN EL RANGO OPTICO, QUE ES LA MAS COMPLETA DE QUE SE DISPONE EN LA ACTUALIDAD. A PARTIR DE ESTOS DATOS OBSERVACIONALES SE HA ESTUDIADO EL SISTEMA, ANALIZANDO SU GEOMETRIA Y

Full solar disk observations of radial velocity, obtained with the IRIS network of resonant scattering spectrometers, are used to analyze the acoustic p-mode spectrum around the acoustic cut-off frequency. Three different methods are used to determine it; two use the power spectrum, while the third uses the phase spectrum. The three values measured

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The Apollo 17 double drive tube 79001/2 (station 9, Van Serg Crater) is distinctive because of its extreme maturity, abundance, and variety of glass clasts. It contains mare glasses of both high Ti and very low Ti (VLT) compositions, and highland glasses of all compositions common in lunar regolith samples: highland basalt (feldspathic; Al2O3