scispace - formally typeset
P

P. Ortiz

Researcher at University of Leicester

Publications -  3
Citations -  5344

P. Ortiz is an academic researcher from University of Leicester. The author has contributed to research in topics: Astrometry & Cepheid variable. The author has an hindex of 3, co-authored 3 publications receiving 4175 citations.

Papers
More filters
Journal ArticleDOI

The Gaia mission

T. Prusti, +624 more
TL;DR: Gaia as discussed by the authors is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach.
Journal ArticleDOI

Gaia Data Release 1. Testing parallaxes with local Cepheids and RR Lyrae stars

G. Clementini, +637 more
TL;DR: In this article, the first parallax measurements of the primary standard candles of the cosmological distance ladder, that involve astrometry collected by Gaia during the initial 14 months of science operation, are published in Gaia Data Release 1 (DR1) as part of the Tycho-Gaia Astrometric Solution (TGAS).
Journal ArticleDOI

Gaia Data Release 1. The photometric data

F. van Leeuwen, +99 more
TL;DR: In this article, the authors present an overview of the photometric data that are part of the first Gaia data release, and the overall precision for the Gaia photometry is shown to be at the milli-magnitude level and has a clear potential to improve further in future releases.