Results 31 to 40 of about 2,490,222 (262)

Multiband Study of Radio Sources of the RCR Catalogue with Virtual Observatory Tools

Open Astronomy, 2012
We present early results of our multiband study of the RATAN Cold Revised (RCR) catalogue obtained from seven cycles of the “Cold” survey carried with the RATAN-600 radio telescope at 7.6 cm in 1980-1999, at the declination of the SS 433 source.
Zhelenkova O. P., Soboleva N. S., Majorova E. K., Temirova A. V.   +3 more
doaj   +1 more source

Querying an astronomical database using large language models: the ALeRCE text-to-SQL system

Astronomy & Astrophysics
We developed a text-to-structured query language (SQL) system based on large language models (LLMs) using in-context learning and applied it to the Automatic Learning for the Rapid Classification of Events (ALeRCE) astronomical database.
Estévez P. A., Espejo-Moreira J., Sanfeliú-Alvarez S., Förster F., Muñoz Arancibia A. M., Cabrera-Vives G., Bauer F. E., Bayo A., Catelan M., Dastidar R., Hernández-García L., Intriago J. A., Pignata G.   +12 more
doaj   +1 more source

Polvere di stelle The Italian platform for data-sharing and data-preserving of modern and ancient astronomical resources

EPJ Web of Conferences, 2018
Polvere di stelle (Stardust) is the web portal of the National Institute for Astrophysics(INAF) dedicated to the Italian astronomical libraries, archives and museums.
Gargano Mauro, Gasperini Antonella, Schiavone Luisa, Brunetti Francesca   +3 more
doaj   +1 more source

Long-Term Multi-Band and Polarimetric View of Mkn 421: Motivations for an Integrated Open-Data Platform for Blazar Optical Polarimetry

Galaxies, 2017
In this work, by making use of the large software and database resources made available through online facilities such as the ASI Science Data Center (ASDC), we present a novel approach to the modelling of blazar emission whereby the multi-epoch SED for ...
Ulisses Barres de Almeida, Bernardo M. O. Fraga, Paolo Giommi, Narek Sahakyan, Sargis Gasparyan, Carlos H. Brandt   +5 more
doaj   +1 more source

A Decade of Linear and Circular Polarimetry with the POLISH2 Polarimeter

The Astrophysical Journal Supplement Series, 2023
The POLISH2 optical polarimeter has been in operation at the Lick Observatory 3 m Shane telescope since 2011, and it was commissioned at the Gemini North 8 m in 2016.
Sloane J. Wiktorowicz, Agnieszka Słowikowska, Larissa A. Nofi, Nicole Rider, Angie Wolfgang, Ninos Hermis, Daniel Jontof-Hutter, Amanda J. Bayless, Gary M. Cole, Kirk B. Crawford, Valeri V. Tsarev, Michael C. Owens, Ernest G. Jaramillo, Geoffrey A. Maul, James R. Graham, Maxwell A. Millar-Blanchaer, Kimberly Bott, Jon C. Mauerhan   +17 more
doaj   +1 more source

Towards a definition of a meteor cluster. Detection of meteor clusters from meteor orbit databases [PDF]

Astronomy & Astrophysics
As of today, there is no official definition of a meteor cluster. It is usually identified as a large number of meteors sharing a similar radiant and velocity, all occurring within a few seconds. Only eight clusters have been reported so far, from single-
A. Ashimbekova, J. Vaubaillon, P. Koten
semanticscholar   +1 more source

The Use of Multiwavelength Archival Observational Data for Scientific Discoveries: a Case of the Supernova Remnant Cassiopeia A

Open Astronomy, 2012
Most of the high-quality astronomical data after a proprietary period of typically one year are provided to open access, allowing researchers to complement their observations with the archival data in other wavelength bands, thus improving quality of the
Docenko Dmitrijs
doaj   +1 more source

Artificial Intelligence‐Assisted Workflow for Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling

Advanced Materials, EarlyView.
AI‐Assisted Workflow for (Scanning) Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling. Abstract (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced materials science but faces challenges in correlating precise atomic structure information with the functional properties of ...
Marc Botifoll, Ivan Pinto‐Huguet, Enzo Rotunno, Thomas Galvani, Catalina Coll, Payam Habibzadeh Kavkani, Maria Chiara Spadaro, Yann‐Michel Niquet, Martin Børstad Eriksen, Sara Martí‐Sánchez, Georgios Katsaros, Giordano Scappucci, Peter Krogstrup, Giovanni Isella, Andreu Cabot, Gonzalo Merino, Pablo Ordejón, Stephan Roche, Vincenzo Grillo, Jordi Arbiol   +19 more
wiley   +1 more source

The CATS Service: An Astrophysical Research Tool

Data Science Journal, 2009
We describe the current status of CATS (astrophysical CATalogs Support system), a publicly accessible tool maintained at Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) (http://cats.sao.ru) allowing one to search hundreds ...
O V Verkhodanov, S A Trushkin, H Andernach, V N Chernenkov   +3 more
doaj   +1 more source

A Blended Artificial Intelligence Approach for Spectral Classification of Stars in Massive Astronomical Surveys

Entropy, 2020
This paper analyzes and compares the sensitivity and suitability of several artificial intelligence techniques applied to the Morgan–Keenan (MK) system for the classification of stars.
Carlos Dafonte, Alejandra Rodríguez, Minia Manteiga, Ángel Gómez, Bernardino Arcay   +4 more
doaj   +1 more source