000127044 001__ 127044
000127044 005__ 20240319081031.0
000127044 0247_ $$2doi$$a10.1002/asna.20224008
000127044 0248_ $$2sideral$$a134408
000127044 037__ $$aART-2022-134408
000127044 041__ $$aeng
000127044 100__ $$aGili, René
000127044 245__ $$aMeasurements of visual double stars with PISCO2 at the Nice 76-cm refractor in 2013–2014
000127044 260__ $$c2022
000127044 5060_ $$aAccess copy available to the general public$$fUnrestricted
000127044 5203_ $$aWe present relative astrometric and photometric measurements of visual double stars made in 2013–2014 with PISCO2 installed at the 76‐cm refractor of the Côte d'Azur Observatory in Nice (France). Our observation 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 method. From our observations of 4,864 multiple stars, we obtained 4,952 new measurements with angular separations in the range 0″.1–14″ and an average accuracy of 0″.015. The mean error on the position angles is 1°.0. Most of the position angles were determined without the usual 180° ambiguity with the application of the direct vector autocorrelation technique and/or by inspection of the Lucky images or the long integration files. We managed to routinely monitor faint systems (mV ≈ 9–11) with large magnitude differences (up to ΔmV ≈ 5). We have thus been able to measure 49 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 318 double stars with an estimated error of 0.2 mag. 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. Thanks to good seeing images and with the use of high‐contrast numerical filters, we have also been able to obtain 455 measurements with an angular separation smaller than the diffraction limit of our instrumentation, and consistent with those obtained with larger telescopes. Finally, we report 378 measurements of the 296 new double stars that we found in the files obtained during the observations.
000127044 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000127044 590__ $$a0.9$$b2022
000127044 591__ $$aASTRONOMY & ASTROPHYSICS$$b58 / 69 = 0.841$$c2022$$dQ4$$eT3
000127044 592__ $$a0.322$$b2022
000127044 593__ $$aSpace and Planetary Science$$c2022$$dQ3
000127044 593__ $$aAstronomy and Astrophysics$$c2022$$dQ3
000127044 594__ $$a1.6$$b2022
000127044 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000127044 700__ $$aPrieur, Jean-Louis
000127044 700__ $$aRivet, Jean-Pierre
000127044 700__ $$aVakili, Farrokh
000127044 700__ $$aScardia, Marco
000127044 700__ $$aPansecchi, Luigi
000127044 700__ $$aArgyle, Robert W.
000127044 700__ $$aLing, Josefina F.
000127044 700__ $$0(orcid)0000-0003-1622-6998$$aPiccotti, Luca
000127044 700__ $$aAristidi, Eric
000127044 700__ $$aKoechlin, Laurent
000127044 700__ $$aBonneau, Daniel
000127044 700__ $$aMaccarini, Luca
000127044 700__ $$aSerot, Jocelyn
000127044 773__ $$g343, 8 (2022), [21 pp.]$$pAstron. Nachr.$$tASTRONOMISCHE NACHRICHTEN$$x0004-6337
000127044 8564_ $$s3860017$$uhttps://zaguan.unizar.es/record/127044/files/texto_completo.pdf$$yVersión publicada
000127044 8564_ $$s2303719$$uhttps://zaguan.unizar.es/record/127044/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000127044 909CO $$ooai:zaguan.unizar.es:127044$$particulos$$pdriver
000127044 951__ $$a2024-03-18-17:10:18
000127044 980__ $$aARTICLE