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dc.contributor.authorHodgkin, S. T.
dc.contributor.authorHarrison, D. L.
dc.contributor.authorBreedt, E.
dc.contributor.authorWevers, T.
dc.contributor.authorRixon, G.
dc.contributor.authorDelgado, A.
dc.contributor.authorYoldas, A.
dc.contributor.authorKostrzewa-Rutkowska, Z.
dc.contributor.authorWyrzykowski, Ł.
dc.contributor.authorvan Leeuwen, M.
dc.contributor.authorBlagorodnova, N.
dc.contributor.authorCampbell, H.
dc.contributor.authorEappachen, D.
dc.contributor.authorFraser, M.
dc.contributor.authorIhanec, N.
dc.contributor.authorKoposov, S. E.
dc.contributor.authorKruszyńska, K.
dc.contributor.authorMarton, G.
dc.contributor.authorRybicki, K. A.
dc.contributor.authorBrown, A. G. A.
dc.contributor.authorBurgess, P. W.
dc.contributor.authorBusso, G.
dc.contributor.authorCowell, S.
dc.contributor.authorDe Angeli, F.
dc.contributor.authorDiener, C.
dc.contributor.authorEvans, D. W.
dc.contributor.authorGilmore, G.
dc.contributor.authorHolland, G.
dc.contributor.authorJonker, P. G.
dc.contributor.authorvan Leeuwen, F.
dc.contributor.authorMignard, F.
dc.contributor.authorOsborne, P. J.
dc.contributor.authorPortell, J.
dc.contributor.authorPrusti, T.
dc.contributor.authorRichards, P. J.
dc.contributor.authorRiello, M.
dc.contributor.authorSeabroke, G. M.
dc.contributor.authorWalton, N. A.
dc.contributor.authorÁbrahám, Péter
dc.contributor.authorAltavilla, G.
dc.contributor.authorBaker, S. G.
dc.contributor.authorBastian, U.
dc.contributor.authorO'Brien, P.
dc.contributor.authorde Bruijne, J.
dc.contributor.authorButterley, T.
dc.contributor.authorCarrasco, J. M.
dc.contributor.authorCastañeda, J.
dc.contributor.authorClark, J. S.
dc.contributor.authorClementini, G.
dc.contributor.authorCopperwheat, C. M.
dc.contributor.authorCropper, M.
dc.contributor.authorDamljanovic, G.
dc.contributor.authorDavidson, M.
dc.contributor.authorDavis, C. J.
dc.contributor.authorDennefeld, M.
dc.contributor.authorDhillon, V. S.
dc.contributor.authorDolding, C.
dc.contributor.authorDominik, M.
dc.contributor.authorEsquej, P.
dc.contributor.authorEyer, L.
dc.contributor.authorFabricius, C.
dc.contributor.authorFridman, M.
dc.contributor.authorFroebrich, D.
dc.contributor.authorGarralda, N.
dc.contributor.authorGomboc, A.
dc.contributor.authorGonzález-Vidal, J. J.
dc.contributor.authorGuerra, R.
dc.contributor.authorHambly, N. C.
dc.contributor.authorHardy, L. K.
dc.contributor.authorHoll, B.
dc.contributor.authorHourihane, A.
dc.contributor.authorJapelj, J.
dc.contributor.authorKann, D. A.
dc.contributor.authorKiss, C.
dc.contributor.authorKnigge, C.
dc.contributor.authorKolb, U.
dc.contributor.authorKomossa, S.
dc.contributor.authorKóspál, Á.
dc.contributor.authorKovács, G.
dc.contributor.authorKun, M.
dc.contributor.authorLeto, G.
dc.contributor.authorLewis, F.
dc.contributor.authorLittlefair, S. P.
dc.contributor.authorMahabal, A. A.
dc.contributor.authorMundell, C. G.
dc.contributor.authorNagy, Z.
dc.contributor.authorPadeletti, D.
dc.contributor.authorPalaversa, L.
dc.contributor.authorPigulski, A.
dc.contributor.authorPretorius, M. L.
dc.contributor.authorvan Reeven, W.
dc.contributor.authorRibeiro, V. A. R. M.
dc.contributor.authorRoelens, M.
dc.contributor.authorRowell, N.
dc.contributor.authorSchartel, N.
dc.contributor.authorScholz, A.
dc.contributor.authorSchwope, A.
dc.contributor.authorSipőcz, B. M.
dc.contributor.authorSmartt, S. J.
dc.contributor.authorSmith, M. D.
dc.contributor.authorSerraller, I.
dc.contributor.authorSteeghs, D.
dc.contributor.authorSullivan, M.
dc.contributor.authorSzabados, L.
dc.contributor.authorSzegedi-Elek, E.
dc.contributor.authorTisserand, P.
dc.contributor.authorTomasella, L.
dc.contributor.authorvan Velzen, S.
dc.contributor.authorWhitelock, P. A
dc.contributor.authorWilson, R. W.
dc.contributor.authorYoung, D. R.
dc.date.accessioned2021-06-15T14:30:03Z
dc.date.available2021-06-15T14:30:03Z
dc.date.issued2021-05-20
dc.identifier.citationHodgkin , S T , Harrison , D L , Breedt , E , Wevers , T , Rixon , G , Delgado , A , Yoldas , A , Kostrzewa-Rutkowska , Z , Wyrzykowski , Ł , van Leeuwen , M , Blagorodnova , N , Campbell , H , Eappachen , D , Fraser , M , Ihanec , N , Koposov , S E , Kruszyńska , K , Marton , G , Rybicki , K A , Brown , A G A , Burgess , P W , Busso , G , Cowell , S , De Angeli , F , Diener , C , Evans , D W , Gilmore , G , Holland , G , Jonker , P G , van Leeuwen , F , Mignard , F , Osborne , P J , Portell , J , Prusti , T , Richards , P J , Riello , M , Seabroke , G M , Walton , N A , Ábrahám , P , Altavilla , G , Baker , S G , Bastian , U , O'Brien , P , de Bruijne , J , Butterley , T , Carrasco , J M , Castañeda , J , Clark , J S , Clementini , G , Copperwheat , C M , Cropper , M , Damljanovic , G , Davidson , M , Davis , C J , Dennefeld , M , Dhillon , V S , Dolding , C , Dominik , M , Esquej , P , Eyer , L , Fabricius , C , Fridman , M , Froebrich , D , Garralda , N , Gomboc , A , González-Vidal , J J , Guerra , R , Hambly , N C , Hardy , L K , Holl , B , Hourihane , A , Japelj , J , Kann , D A , Kiss , C , Knigge , C , Kolb , U , Komossa , S , Kóspál , Á , Kovács , G , Kun , M , Leto , G , Lewis , F , Littlefair , S P , Mahabal , A A , Mundell , C G , Nagy , Z , Padeletti , D , Palaversa , L , Pigulski , A , Pretorius , M L , van Reeven , W , Ribeiro , V A R M , Roelens , M , Rowell , N , Schartel , N , Scholz , A , Schwope , A , Sipőcz , B M , Smartt , S J , Smith , M D , Serraller , I , Steeghs , D , Sullivan , M , Szabados , L , Szegedi-Elek , E , Tisserand , P , Tomasella , L , van Velzen , S , Whitelock , P A , Wilson , R W & Young , D R 2021 , ' Gaia photometric Science Alerts ' , Astronomy & Astrophysics . https://doi.org/10.1051/0004-6361/202140735en
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 274624328
dc.identifier.otherPURE UUID: 3554892d-f92e-445d-b205-1c55a11ca738
dc.identifier.otherBibCode: 2021arXiv210601394H
dc.identifier.otherWOS: 000684667600003
dc.identifier.otherScopus: 85112848810
dc.identifier.urihttp://hdl.handle.net/10023/23366
dc.description.abstractContext. Since July 2014, the Gaia mission has been engaged in a high-spatial-resolution, time-resolved, precise, accurate astrometric, and photometric survey of the entire sky. Aims. We present the Gaia Science Alerts project, which has been in operation since 1 June 2016. We describe the system which has been developed to enable the discovery and publication of transient photometric events as seen by Gaia. Methods. We outline the data handling, timings, and performances, and we describe the transient detection algorithms and filtering procedures needed to manage the high false alarm rate. We identify two classes of events: (1) sources which are new to Gaia and (2) Gaia sources which have undergone a significant brightening or fading. Validation of the Gaia transit astrometry and photometry was performed, followed by testing of the source environment to minimise contamination from Solar System objects, bright stars, and fainter near-neighbours. Results. We show that the Gaia Science Alerts project suffers from very low contamination, that is there are very few false-positives. We find that the external completeness for supernovae, CE = 0.46, is dominated by the Gaia scanning law and the requirement of detections from both fields-of-view. Where we have two or more scans the internal completeness is CI = 0.79 at 3 arcsec or larger from the centres of galaxies, but it drops closer in, especially within 1 arcsec. Conclusions. The per-transit photometry for Gaia transients is precise to 1 per cent at G = 13, and 3 per cent at G=19. The per-transitastrometry is accurate to 55 milliarcseconds when compared to Gaia DR2. The Gaia Science Alerts project is one of the most homogeneous and productive transient surveys in operation, and it is the only survey which covers the whole sky at high spatial resolution (subarcsecond), including the Galactic plane and bulge.
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rightsCopyright © 2021 ESO. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1051/0004-6361/202140735.en
dc.subjectAstronomical instrumentation, methods and techniquesen
dc.subjectSurveysen
dc.subjectSupernovae: generalen
dc.subjectQuasars: generalen
dc.subjectStars: variable: generalen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subject3rd-DASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleGaia photometric Science Alertsen
dc.typeJournal articleen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.St Andrews Centre for Exoplanet Scienceen
dc.identifier.doihttps://doi.org/10.1051/0004-6361/202140735
dc.description.statusPeer revieweden
dc.identifier.urlhttp://adsabs.harvard.edu/abs/2021arXiv210601394Hen


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