Astronomers from non-English-speaking countries, who form a sizeable proportion of the astronomical research community, are obliged to communicate the results...
Overview of Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP)
The solar chromosphere is an important boundary, through which all of the plasma, magnetic fields and energy in the corona and solar wind are supplied. Since...
Overview of telescope structure, enclosure, and pier preliminary design of the European Solar Telescope
The European Solar Telescope (EST) is a 4.2-m solar telescope, based on an aplanatic Gregorian configuration with an alt-azimuthal mount. This contribution...
Overview of the Gran Telescopio Canarias Global Model Simulation
The Gran Telescopio Canarias (GTC) is a Spanish initiative, open to international partnership, to construct a 10-m segmented mirror telescope at the Roque de...
Overview of the HARMONI integral field spectrograph for the ELT - Insights into Galaxy Evolution and AGN
The High Angular Resolution Monolithic Optical and Near-infrared Integral field spectrograph (HARMONI) is a first generation instrument designed for the...
Overview of the results from extra-galactic observations with the MAGIC telescopes
The non-thermal jet emission in active galactic nuclei covers several orders of magnitude in the frequency range. Hence the observational approach needs multi...
Overview of the status of the European Solar Telescope
The European Solar Telescope (EST) aims to become the most ambitious ground-based solar telescope in Europe. Its roots lie in the knowledge and expertise gained...
Oxygen abundance from strong-line methods at extremely low metallicities
The determination of oxygen abundance in nebulae requires measuring a significant number of emission lines distributed along a wide spectral range. The required...
Oxygen abundance in M101 HII regions (Cedres+, 2004)
We present the oxygen abundance determination for 90 HII regions in the inner parts of the grand design galaxy M101. The abundances were derived employing the P...