They publish a catalog of almost 700 million astronomical objects • Diario de Los Andes, news from Los Andes, Trujillo, Táchira and Mérida

Madrid, Jan 14 (EFE) .- The international initiative Dark Energy Survey, in which several Spanish research centers participate, has launched a public collection of almost 700 million astronomical objects, the result of more than half a decade of observations.

Dark Energy Survey (DES) is a collaboration of more than 400 scientists from 26 institutions spread over seven countries.

Its main instrument, the 570-megapixel Dark Energy Camera, is mounted on the 4-meter Blanco telescope at the Cerro Tololo Inter-American Observatory in Chile, and its data is processed at the National Center for Supercomputing Applications in Illinois (United States). .

This collaboration includes Spanish scientists from the Center for Energy, Environmental and Technological Research (Ciemat), the Institut de Ciències de l’Espai (IEEC-CSIC), the Institut de Física d’Altes Energies (IFAE) and the Institute of Theoretical Physics ( center of the Autonomous University of Madrid and the CSIC).

Specifically, DES has now launched DR2, the second publication of images and object catalogs in the seven-year history of the project and which represents the culmination of more than half a decade of collecting and analyzing astronomical data with the ultimate goal of understanding the accelerated expansion of the universe and the phenomenon of dark energy.

It is one of the largest astronomical catalogs published to date, according to an IFAE note, which details that the DR2 includes almost 700 million astronomical objects.

This expands the 400 million objects cataloged in the previous data release (DR1) and also improves the catalog, “refining calibration techniques, which, with the deeper combined images, lead to better estimates of the quantity and distribution of matter in the universe ”, according to the same sources.

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Researchers around the world can access and extract this data to make new discoveries about the universe, complementary to the studies being carried out by the Dark Energy Survey collaboration. The publication is available ‘online’ and is also open for the public to explore.

“These catalogs and images are extremely rich for multiple astrophysical analyzes, of our galaxy and beyond,” sums up Aurelio Carnero Rosell, a researcher at Ciemat.

In addition, he adds, they have been subjected to intense scrutiny and verification in recent months to provide quality data.

“This is a momentous milestone,” says DES director Rich Kron, who details that after years of taking photographs of distant celestial objects in the night sky, and after carefully verifying the quality and calibration of the images captured by Dark Energy Camera, this second batch of data is made public.

This researcher from the University of Chicago adds: “We invite both professional and amateur scientists to delve into what we consider to be a treasure chest yet to be discovered.”

THE DR2 is presented in a session of the meeting of the American Astronomical Society.

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