000132783 001__ 132783
000132783 005__ 20240711085509.0
000132783 0247_ $$2doi$$a10.1002/asna.20230140
000132783 0248_ $$2sideral$$a137702
000132783 037__ $$aART-2024-137702
000132783 041__ $$aeng
000132783 100__ $$aPrieur, Jean-Louis
000132783 245__ $$aMeasurements of visual double stars with <scp>PISCO2</scp> at the Nice 76-cm refractor in 2016–2017
000132783 260__ $$c2024
000132783 5203_ $$aWe present relative astrometric and photometric measurements of visual double stars made in 2016–2017, with PISCO2 installed at the 76‐cm refractor of Côte d'Azur Observatory in Nice (France). Our observing list contains orbital couples as well as double stars whose motion is still uncertain. Three different techniques were used for obtaining measurements: Lucky Imaging, Speckle Interferometry and the direct vector autocorrelation (DVA) method. From our observations of 1,510 multiple stars, we obtained 2,918 new measurements with angular separations in the range 0″.1–20″ and an average accuracy of . The mean error on the position angles is 1°.1. Most of the position angles were determined without the usual 180° ambiguity with the application of the DVA technique and/or by inspection of the Lucky images or the long integration files. We managed to routinely monitor faint systems () with large magnitude differences (up to ). We have thus been able to measure six systems containing red dwarf stars that had been poorly monitored since their discovery, from which we estimated the stellar masses thanks to Gaia measurements. We also measured the magnitude difference of the two components of 593 double stars with a mean error of 0.1 mag. Thanks to good seeing images and with the use of high‐contrast numerical filters, we have also been able to obtain 46 measurements with an angular separation smaller than the diffraction limit of our instrumentation. Except for a few objects that have been discussed, our measurements are in good agreement with the ephemerides computed with published orbital elements, even for the double stars whose separation is smaller than the diffraction limit. We also report the measurements of 205 new double stars that we found in the files obtained during the observations.
000132783 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000132783 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000132783 700__ $$aGili, René
000132783 700__ $$aRivet, Jean-Pierre
000132783 700__ $$aVakili, Farrokh
000132783 700__ $$aScardia, Marco
000132783 700__ $$aPansecchi, Luigi
000132783 700__ $$aArgyle, Robert W.
000132783 700__ $$aLing, Josefina F.
000132783 700__ $$0(orcid)0000-0003-1622-6998$$aPiccotti, Luca
000132783 700__ $$aAristidi, Eric
000132783 700__ $$aKoechlin, Laurent
000132783 700__ $$aBonneau, Daniel
000132783 700__ $$aMaccarini, Luca
000132783 700__ $$aSerot, Jocelyn
000132783 773__ $$g345, 4 (2024), e20230140 [19 pp.]$$pAstron. Nachr.$$tASTRONOMISCHE NACHRICHTEN$$x0004-6337
000132783 8564_ $$s621367$$uhttps://zaguan.unizar.es/record/132783/files/texto_completo.pdf$$yVersión publicada
000132783 8564_ $$s1919120$$uhttps://zaguan.unizar.es/record/132783/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000132783 909CO $$ooai:zaguan.unizar.es:132783$$particulos$$pdriver
000132783 951__ $$a2024-07-11-08:52:10
000132783 980__ $$aARTICLE