EN ESTA TESIS SE HA UTILIZADO LA RED DE DETECTORES DE CENTELLEO HEGRA-KIEL INSTALADO EN EL OBSERVATORIO DEL ROQUE DE LOS MUCHACHOS PARA ESTUDIAR LA EMISION DE RADIACION GAMMA PROCEDENTE DE FUENTES PUNTUALES A ENERGIAS MAYORES QUE 1014 EV. EN PRIMER LUGAR, SE HA REALIZADO UNA BUSQUEDA DE EMISION CONTINUA PROCEDENTE DE 27 OBJETOS GALACTICOS Y 3

IAUC 6023 available at Central Bureau for Astronomical Telegrams.

We present optical spectrophotometric observations for 50 blazars obtained in 13 different campaigns over a 7 year period. The spectral flux distribution is studied in terms of a power-law (fnu varies as nu exp alpha) and, when relevant, the contribution of a host galaxy. We give spectral indices and fluxes of the nonthermal component and, when

The evolution of Population II Red Giants has been studied by adopting Reimers' formalism for the efficiency of mass loss. Evolutionary computations for models of 0.8M0, Y = 0.23 and Z = 0.0002 are presented for a wide range of values of the parameter TI governing the mass loss rate. We find that for values of TI greater than about 0.70 the

We present medium-resolution ( /A 500) absolute spectrophotometry of 15 bright and cool (N-type) carbon stars. The observations were made with a cooled grating spectrometer within the J ii, K and L' atmospheric windows (1-4.2 ). The observed C stars were AQ Sgr, RT Cap, RV Cyg, RY Dra, S Sct, T Lyr, TX Psc, TW Oph, VAql, V Cyg, VX And, V460 Cyg, Y

The Two Micron Galactic Survey (TMGS) is the most sensitive large scale point source near infrared survey of the Galactic Plane yet attempted. The Galactic plane has been drift-scanned in several regions over the areas -5 deg less than l less than 30 deg, absolute value of b less than or equal to 15 deg and 30 deg less than l less than 180 deg