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Microvariability in AGNs: study of different statistical methods II. Light curves from simulated images
(Wiley Blackwell Publishing, Inc, 2020-08)
In a previous paper, we studied two statistical methods used to analyse the variability of active galactic nuclei (AGNs): the C and F statistics. Applying them to observed differential light-curves of 39 AGNs, we found ...
A close encounter of the massive kind
(Wiley Blackwell Publishing, Inc, 2017-01)
We have used (a) HST ACS imaging and STIS spectroscopy, (b) ground-basedPIONIER/VLT long-baseline interferometry, and (c) ground-basedspectroscopy from different instruments to study the orbit of theextreme multiple system ...
The final date of the Antikythera mechanism
(Science History Publications Ltd, 2017-08)
The Antikythera mechanism is a mechanical astronomical instrument that was discovered in an ancient shipwreck (from about 60 bce) at the beginning of the twentieth century. A consensus does not exist on the question of ...
Turbulence characterization by studying laser beam wandering in a differential tracking motion setup
(Society of Photo-Optical Instrumentation Engineers, 2009-10-01)
The Differential Image Motion Monitor (DIMM) is a standard and widely used instrument for astronomical seeing measurements. The seeing values are estimated from the variance of the differential image motion over two equal ...
Extra-Planar gas in the Leiden/Argentine/Bonn HI Surveys
(Astronomical Society of the Pacific, 2005-12)
We present a novel approach for a definition of the phase space of the Milky Way HI disk and its associated gaseous halo. We discuss how model and observations can be used to discriminate between disk, disk-halo interface ...
Carnegie supernova project-II: The near-infrared spectroscopy program
(The Astronomical Society of the Pacific, 2019-01)
Shifting the focus of Type Ia supernova (SN Ia) cosmology to the near infrared (NIR) is a promising way to significantly reduce the systematic errors, as the strategy minimizes our reliance on the empirical width-luminosity ...
Low threshold acquisition controller for Skipper charge-coupled devices
(SPIE.Digital Library, 2021-06-21)
The development of the Skipper-charge-coupled devices (Skipper-CCDs) has been a major technological breakthrough for sensing very weak ionizing particles. The sensor allows to reach the ultimate sensitivity of silicon ...
G5.89: An explosive outflow powered by a proto-stellar merger?
(Oxford University Press, 2019-06)
The explosive outflows are a newly discovered family of molecular outflows associated with high-mass star-forming regions. Such energetic events are possibly powered by the release of gravitational energy related with the ...
Neutron escape from microquasar jets
(Asociación Argentina de Astronomía, 2020)
The launching mechanism and composition of astrophysical jets are still open problems. If relativistic protons are present in these jets, then energetic neutrons should be produced. Since neutrons are not affected by ...
Improving the precision matrix for precision cosmology
(Oxford University Press, 2015-12)
The estimation of cosmological constraints from observations of the large-scale structure of the Universe, such as the power spectrum or the correlation function, requires the knowledge of the inverse of the associated ...