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EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981

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dc.contributor.authorSkottfelt, J.
dc.contributor.authorBramich, D. M.
dc.contributor.authorFiguera Jaimes, Roberto Jose
dc.contributor.authorJorgensen, U. G.
dc.contributor.authorKains, Noé
dc.contributor.authorHarpsoe, K. B. W.
dc.contributor.authorLiebig, C.
dc.contributor.authorPenny, M. T.
dc.contributor.authorAlsubai, K. A.
dc.contributor.authorAndersen, J. M.
dc.contributor.authorBozza, V.
dc.contributor.authorBrowne, P.
dc.contributor.authorCalchi Novati, S.
dc.contributor.authorDamerdji, Y.
dc.contributor.authorDiehl, C.
dc.contributor.authorDominik, M.
dc.contributor.authorElyiv, A.
dc.contributor.authorGiannini, E.
dc.contributor.authorHessman, F.
dc.contributor.authorHinse, T. C.
dc.contributor.authorHundertmark, M.
dc.contributor.authorJuncher, D.
dc.contributor.authorKerins, E.
dc.contributor.authorKorhonen, H.
dc.contributor.authorMancini, L.
dc.contributor.authorMartin, R.
dc.contributor.authorRabus, M.
dc.contributor.authorRahvar, S.
dc.contributor.authorScarpetta, G.
dc.contributor.authorSouthworth, J.
dc.contributor.authorSnodgrass, C.
dc.contributor.authorStreet, R. A.
dc.contributor.authorSurdej, J.
dc.contributor.authorTregloan-Reed, J.
dc.contributor.authorVilela, C.
dc.contributor.authorWilliams, A.
dc.date.accessioned2014-08-14T09:31:02Z
dc.date.available2014-08-14T09:31:02Z
dc.date.issued2013-05
dc.identifier79141794
dc.identifiere3a344f1-7cef-4f5b-9e8f-4db7004b5665
dc.identifier000319858700111
dc.identifier84878002536
dc.identifier.citationSkottfelt , J , Bramich , D M , Figuera Jaimes , R J , Jorgensen , U G , Kains , N , Harpsoe , K B W , Liebig , C , Penny , M T , Alsubai , K A , Andersen , J M , Bozza , V , Browne , P , Calchi Novati , S , Damerdji , Y , Diehl , C , Dominik , M , Elyiv , A , Giannini , E , Hessman , F , Hinse , T C , Hundertmark , M , Juncher , D , Kerins , E , Korhonen , H , Mancini , L , Martin , R , Rabus , M , Rahvar , S , Scarpetta , G , Southworth , J , Snodgrass , C , Street , R A , Surdej , J , Tregloan-Reed , J , Vilela , C & Williams , A 2013 , ' EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981 ' , Astronomy & Astrophysics , vol. 553 , A111 . https://doi.org/10.1051/0004-6361/201321430en
dc.identifier.issn0004-6361
dc.identifier.otherORCID: /0000-0002-3202-0343/work/75996759
dc.identifier.urihttps://hdl.handle.net/10023/5147
dc.descriptionJ.S. acknowledges support from the ESO 2012 DGDF for a two month visit to ESO Garching. The operation of the Danish 1.54 m telescope is financed by a grant to UGJ from the Danish Natural Science Research Council. We also acknowledge support from the European Community’s Seventh Framework Programme (FP7/2007−2013/) under grant agreement Nos. 229517, 268421 and 274889 and from the Center of Excellence Centre for Star and Planet Formation (StarPlan) funded by The Danish National Research Foundation. K.A.A., M.D., D.M.B., C.L., M.H., R.A.S. and C.S. are thankful to Qatar National Research Fund (QNRF), member of Qatar Foundation, for support by grant NPRP 09-476-1-078. Y.D., A.E. under J.S. acknowledge support from the Communauté française de Belgique – Actions de recherche concertées – Académie universitaire to Wallonie-Europe. TCH acknowledges support from the Korea Research Council of Fundamental Science & Technology (KRCF) via the KRCF Young Scientist Research Fellowship Programme and for financial support from KASI travel grant number 2013-9-400-00. M.R. acknowledges support from FONDECYT postdoctoral fellowship No. 3120097.en
dc.description.abstractTwo previously unknown variable stars in the crowded central region of the globular cluster NGC 6981 are presented. The observations were made using the electron multiplying CCD (EMCCD) camera at the Danish 1.54 m Telescope at La Silla, Chile. The two variables were not previously detected by conventional CCD imaging because of their proximity to a bright star. This discovery demonstrates that EMCCDs are a powerful tool for performing high-precision time-series photometry in crowded fields and near bright stars, especially when combined with difference image analysis.
dc.format.extent4
dc.format.extent506774
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysicsen
dc.subjectGlobular clusters: individual: NGC 6981en
dc.subjectStars: variables: RR Lyraeen
dc.subjectInstrumentation: high angular resolutionen
dc.subjectStars: variables: generalen
dc.subjectQB Astronomyen
dc.subject.lccQBen
dc.titleEMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981en
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doi10.1051/0004-6361/201321430
dc.description.statusPeer revieweden
dc.identifier.grantnumberST/J001651/1en


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