Old algorithms are still in use nowadays setting the Easter date accordingly to some elements giving the Spring Equinox and the New Moon for a given year. At...
An Atlas of Optical Continuum and Line Emission from Low-Mass X-Ray Binaries
Broadband optical spectra of a sample of 15 low-mass X-ray binaries (LMXBs) is obtained in the range of 4000-9000 A. The spectra are fitted with combinations of...
An Atlas of Position-Velocity Diagrams in the Inner Regions of Disk Galaxies
We present an atlas of position-velocity (PV) diagrams of ionized gas in the inner regions of 23 disk galaxies. The gas kinematics have been obtained from...
An atmospheric corrector to work with FastCam at William Herchel Telescope
In this contribution an Atmospheric Dispersion Corrector (ADC) developed for the FastCam project is presented. FastCam is a system based on 'lucky imaging'...
An atmospheric turbulence and telescope simulator for the development of AOLI
AOLI, Adaptive Optics Lucky Imager, is the next generation of extremely high resolution instruments in the optical range, combining the two more promising...
An attempt to derive Mg isotopic ratios in carbon stars
We discuss the use of the spectral range near 7570 Å to determine the Mg isotopic ratios in carbon stars using the B'2 Sigma +-X 2 Sigma + system of the MgH...
An Attempt to Observe Stellar Convection via Power Spectrum
It is known that the convective motions at solar photosphere level are visible in the frequency domain through the so called ""solar noise"". Time-resolved...