233 citations
- Millennium Institute of AstrophysicsCL111 papers
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11 papers · 1 filter
The evolution of PUCHEROS from a basic to a competitive tool for stellar astrophysics
Luca Antonucci, Leonardo Vanzi, Abner Zapata +16
We present PUCHEROS +, a new spectrograph developed as an enhanced version of PUCHEROS (Pontificia Universidad Catolica High Echelle Resolution Optical Spectrograph), which was the…
PLATOSpec: a precise spectrograph in support of space missions
P. Kabáth, M. Skarka, A. Hatzes +42
The upcoming space missions that will characterize exoplanets, such as PLATO and Ariel, will collect huge amounts of data that will need to be complemented with ground-based observ…
Optical ray tracing of echelle spectrographs applied to the wavelength solution for precise radial velocities
Marcelo Tala Pinto, Adrian Kaminski, Andreas Quirrenbach +1
We present , a ray tracing software package that computes the path of rays through echelle spectrographs. Our algorithm is based on sequential direct tracing with Se…
RAM: Rapid Advection Algorithm on Arbitrary Meshes
Pablo Benítez-Llambay, Leonardo Krapp, Ximena S. Ramos +1
The study of many astrophysical flows requires computational algorithms that can capture high Mach number flows, while resolving a large dynamic range in spatial and density scales…
State-space representation of Matérn and Damped Simple Harmonic Oscillator Gaussian processes
Andrés Jordán, Susana Eyheramendy, Johannes Buchner
Gaussian processes (GPs) are used widely in the analysis of astronomical time series. GPs with rational spectral densities have state-space representations which allow O(n) evaluat…
Searching for changing-state AGNs in massive datasets -- I: applying deep learning and anomaly detection techniques to find AGNs with anomalous variability behaviours
P. Sánchez-Sáez, H. Lira, L. Martí +14
The classic classification scheme for Active Galactic Nuclei (AGNs) was recently challenged by the discovery of the so-called changing-state (changing-look) AGNs (CSAGNs). The phys…