Aims: The knowledge of physical conditions in young radio sources is important for defining the framework of models describing radio source evolution. We investigate whether young radio sources are in equipartition (i.e. minimum energy) conditions by comparing the equipartition magnetic fields of 5 High Frequency Peakers (HFP) with values directly

For the long-lasting impact of CoRoT's planet findings, precise knowledge of the times of their transits is of vital importance for any future observing campaigns. Here we give the motivation and first results of a systematic revisit of the transits of most CoRoT planets to refine their ephemeris. As secondary objectives, more precise planet

We use asteroid differential photometry gathered in the past decades together with the Gaia stellar catalogue (as photometric standards) to obtain relative magnitudes. The obtained magnitudes are then used to fit the multi-opposition phase curves in several ways depending on data quality.

We find a clear diversity in the 3 μm and 10 μm features of three Cybele asteroids: (107) Camilla, (121) Hermione, and (65) Cybele. (121) Hermione exhibits a "check-like" 3 μm feature, which may be attributed to OH-dominated minerals and (107) Camilla shows a rounded "bowl" like feature closer to that of (65) Cybele, which may be attributed to H2O

Context: The historic plates of the Carte du Ciel, an international cooperative project launched in 1887, offers valuable first-epoch material for determining of absolute proper motions. Aims: We present an original method of digitizing and astrometrically reducing Carte du Ciel plate material using an inexpensive flatbed scanner, to demonstrate

Following the development of the laser frequency comb which led to the 2005 Nobel Prize in Physics, we began investigating the possibility of using this novel technology for precise and accurate spectrograph calibration. A programme was begun, aimed at demonstrating the capabilities of laser frequency combs (LFC) when coupled to an astronomical