000002995 001__ 2995
000002995 005__ 20161222123537.0
000002995 0247_ $$2DOI$$a10.1051/0004-6361/201629583
000002995 037__ $$aSCART-2016-0025
000002995 100__ $$aClementini, G.
000002995 245__ $$aGaia Data Release 1. The Cepheid and RR Lyrae star pipeline and its application to the south ecliptic pole region
000002995 260__ $$c2016
000002995 520__ $$aContext. The European Space Agency spacecraft Gaia is expected to observe about 10 000 Galactic Cepheids and over 100 000 Milky Way RR Lyrae stars (a large fraction of which will be new discoveries), during the five-year nominal lifetime spent scanning the whole sky to a faint limit of G = 20.7 mag, sampling their light variation on average about 70 times. Aims: We present an overview of the Specific Objects Study (SOS) pipeline developed within the Coordination Unit 7 (CU7) of the Data Processing and Analysis Consortium (DPAC), the coordination unit charged with the processing and analysis of variable sources observed by Gaia, to validate and fully characterise Cepheids and RR Lyrae stars observed by the spacecraft. The algorithms developed to classify and extract information such as the pulsation period, mode of pulsation, mean magnitude, peak-to-peak amplitude of the light variation, subclassification in type, multiplicity, secondary periodicities, and light curve Fourier decomposition parameters, as well as physical parameters such as mass, metallicity, reddening, and age (for classical Cepheids) are briefly described. Methods: The full chain of the CU7 pipeline was run on the time series photometry collected by Gaia during 28 days of ecliptic pole scanning law (EPSL) and over a year of nominal scanning law (NSL), starting from the general Variability Detection, general Characterization, proceeding through the global Classification and ending with the detailed checks and typecasting of the SOS for Cepheids and RR Lyrae stars (SOS Cep&RRL). We describe in more detail how the SOS Cep&RRL pipeline was specifically tailored to analyse Gaia's G-band photometric time series with a south ecliptic pole (SEP) footprint, which covers an external region of the Large Magellanic Cloud (LMC), and to produce results for confirmed RR Lyrae stars and Cepheids to be published in Gaia Data Release 1 (Gaia DR1). Results: G-band time series photometry and characterisation by the SOS Cep&RRL pipeline (mean magnitude and pulsation characteristics) are published in Gaia DR1 for a total sample of 3194 variable stars (599 Cepheids and 2595 RR Lyrae stars), of which 386 (43 Cepheids and 343 RR Lyrae stars) are new discoveries by Gaia. All 3194 stars are distributed over an area extending 38 degrees on either side from a point offset from the centre of the LMC by about 3 degrees to the north and 4 degrees to the east. The vast majority are located within the LMC. The published sample also includes a few bright RR Lyrae stars that trace the outer halo of the Milky Way in front of the LMC.
000002995 536__ $$aESA Prodex Gaia 4200090287-291/$$c4200090294-296/$$f4000110150
000002995 594__ $$aNO
000002995 6531_ $$astars: general
000002995 6531_ $$astars: oscillations
000002995 6531_ $$astars: variables, Cepheids
000002995 6531_ $$astars: variables: RR Lyrae
000002995 6531_ $$amethods: data analysis
000002995 6531_ $$aMagellanic Clouds
000002995 700__ $$aRipepi, V.
000002995 700__ $$aLeccia, S.
000002995 700__ $$aMowlavi, N.
000002995 700__ $$aLecoeur-Taibi, I.
000002995 700__ $$aMarconi, M.
000002995 700__ $$aSzabados, L.
000002995 700__ $$aEyer, L.
000002995 700__ $$aGuy, L. P.
000002995 700__ $$aRimoldini, L.; 
000002995 700__ $$aJevardat de Fombelle, G.
000002995 700__ $$aHoll, B.
000002995 700__ $$aBusso, G
000002995 700__ $$aCharnas, J.
000002995 700__ $$aCuypers, J.
000002995 700__ $$aDe Angeli, F.
000002995 700__ $$aDe Ridder, J.
000002995 700__ $$aDebosscher, J.
000002995 700__ $$aEvans, D. W.
000002995 700__ $$aKlagyivik, P.
000002995 700__ $$aMusella, I.
000002995 700__ $$aNienartowicz, K.
000002995 700__ $$aOrdóñez, D.
000002995 700__ $$aRegibo, S.
000002995 700__ $$aRiello, M.
000002995 700__ $$aSarro, L. M.
000002995 700__ $$aSüveges, M.
000002995 773__ $$cA133$$pAstronomy & Astrophysics$$v595$$y2016
000002995 8560_ $$fjan.cuypers@observatoire.be
000002995 85642 $$ahttp://esoads.eso.org/cgi-bin/nph-data_query?bibcode=2016A%26A...595A.133C&link_type=EJOURNAL&db_key=AST&high=
000002995 85642 $$ahttp://esoads.eso.org/cgi-bin/nph-data_query?bibcode=2016A%26A...595A.133C&link_type=ARTICLE&db_key=AST&high=
000002995 85642 $$ahttp://esoads.eso.org/cgi-bin/nph-data_query?bibcode=2016A%26A...595A.133C&link_type=PREPRINT&db_key=AST
000002995 905__ $$apublished in
000002995 980__ $$aREFERD