ELMER is a visible imager spectrograph currently scheduled to be in operation at the GTC on Day One. This paper covers engineering aspects of the instrument and...
The Instrumentation of the Main Astronomical Observatory of the National Academy of Sciences of Ukraine
The instrumentation and observational programs of the Solar Physics Department of the Main Astronomical Observatory are described. The observatory has two solar...
The instrumentation plan of the 10.4m GTC telescope
The 10.4m Gran Telescopio Canarias (GTC) was designed to be a versatile telescope, able to serve a wide scientific community. To this aim, various focal...
The Integral Field Unit of the Near Infrared Spectrophaph for JWST
The Near Infrared Spectrograph (NIRSpec) on board of the James Webb Space Telescope (JWST) will be equipped with an Integral Field Unit (IFU) which will allow...
The integrated magnetic field of the sun seen by the GOLF experiment
The secondary objective of the GOLF Experiment on-board the SOHO space mission is to measure the line-of-sight component of the disk averaged magnetic field of...
The intensity distribution of the penumbra at different stages of evolution has been analyzed. The results have been different for both evolved and primitive...
Only less than 150 Wolf-Rayet galaxies are actually known. Many of them are dwarf or irregular galaxies, and some show close companion objects. Peculiar...