We describe a new technique to measure stellar kinematics and line-strengths at large radii in nearby galaxies. Using the integral-field spectrograph SAURON as a ‘photon-collector’, we obtain spectra out to four effective radii (Re) in the early-type galaxy NGC 3379. By fitting orbit-based models to the extracted stellar velocity profile, we find

As part of an extensive multiwavelength monitoring campaign, the International Ultraviolet Explorer satellite was used to observe the broad-line radio galaxy 3C 390.3 during the period 1994 December 31-1996 March 5. Spectra were obtained every 6-10 days. The UV continuum varied by a factor of 7 through the campaign, while the broad emission lines

Wie bei menschlichen Zwillingen können sich auch Sternzwillinge durchaus starkvoneinander unterscheiden. Wie sehr, das hängt in erster Linie von der jeweiligen Masse der Geschwistersterne und deren Massenverhältnis zueinander ab. Doppelsterne werden meist gemeinsam geboren. Es ist dann ihre jeweilige Masse, die über deren

Wie bei menschlichen Zwillingen kännen sich auch Sternzwillinge durchaus stark voneinander unterscheiden. Wie sehr, das hängt in erster Linie von der jeweiligen Masse der Geschwistersterne und deren Massenverhältnis zueinander ab.

We present the current status of definition of the observational and analysis strategies for the study of Active Galactic Nuclei (AGN) in the OTELO survey. The main goal of this project is to determine the fraction of each species of AGN and their luminosity functions.

Recent planning for Constellation-X has driven the exploration of grazing incidence telescopes with focal lengths of 50 m or greater. Formation flying, wherein separate optic and detector spacecraft travel in formation, is one approach to implementing such long focal lengths. This approach eliminates the telescope tube that is an integral part of