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Binary star research using „ microtelescopes “

Binary star research using „ microtelescopes “. Miloslav Zejda, Zdeněk Mikulášek , Jiří Liška Masaryk University Brno, Czech Republic Petr Svoboda private observatory , Brno, Czech Republic. KOLOS 2011, Kolonica , December 1, 2011. first telescopes – diameter only several cm!

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Binary star research using „ microtelescopes “

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  1. Binary starresearchusing „microtelescopes“ Miloslav Zejda, Zdeněk Mikulášek, Jiří Liška Masaryk University Brno, Czech Republic Petr Svoboda privateobservatory, Brno, Czech Republic KOLOS 2011, Kolonica, December 1, 2011

  2. firsttelescopes – diameteronlyseveral cm! • Galileo & Castelli: • discoveriesofbinariesormultiplesystems: • Mizar(1616), • J1Orionis – Trapez(1617) • bScorpii …

  3. Variablestarsobservations(in modernhistorysince 1596) • Means: • nakedeye – limits – 6-7 mag, • telescope + eye – 1844 Argelander • telescope + photography – 1881 Draper – 14.7 mag • telescope + photoelectricphotometer • 1892 Monck, 1907 Stebinns • 1946 Kron, early 50‘s Johnson & Morgan UBV • telescope + CCD – 1979 – KittPeak NO

  4. Silicon age • spread of objective measurements among many observatories and amateur astronomers • increasing number of photometric measurements • observing of fainter and fainter objects • HOWEVER • stars brighter than6 mag are too bright • => lack of observations of bright stars!

  5. Do we need observations of bright stars? yes, indeed! Why? • variability of bright stars is usually known for a long time => unique possibility to study long-term variations • usage of different methods except photometry

  6. objections? surveys – ASAS… - monochromatic, unsatisfactorytimeresolution spacemissions – Hipparcos – good, but old, timeresolution Kepler, COROT – excellentjobs, but … GAIA – bright limit 6 mag nano-satellite – BRITE project

  7. solution? • return to Galileo‘ssizetelescopes • => usageofmicro/nanotelescopes • „windows astronomy“ • „balcony astronomy“ • breakdowntheprejudices • suitable for amateursand small observatories • Advantages: • cheapacquisition • cheap and efficientpractise • excellent opportunity to obtain unique • long sets of observations • possibilityforstudents and travellers

  8. suggestions? • to equiptheobserverswith a kit (CCD, photometricfilters, nanotelescope) • tellthemwhat and howtheyshouldobserve (targets, filters, timeresolutions…) • establish a network ofobservers – seeforanexample http://var.astro.cz

  9. Examplesofusagenanotelescopes

  10. NO Pup Minima timingsofeclipsingbinaries P. Svoboda; 0.035m refractor CCD SBIG ST7 filterI J. Liška: RF 0.04m + CCD ATIK 16Ic Phe DI = 0.15 mag TW Dra

  11. Lightcurves J. Liška: 0.04m refractor + CCD G2-0402 SAAO 0,5m + single-channel PEP MJUO 0,6m + single-channel PEP L. C. Watson, J. D. Pritchard, J. B. Hearnshaw,P P. M. Kilmartin and A. C. Gilmore:MNRAS 325, 143–150 (2001)

  12. P. Svoboda; 0.035m refractor, CCD SBIG ST7

  13. P. Svoboda; 0.035m refractor, CCD SBIG ST7 HD 1438 (And) amplitudeDV≈ 0.02 mag

  14. Itisworth to do it!

  15. Thank you for your attention! In thepresentationweusedobservations and materialsfrom: VSES archive NYX archive personalarchivesofauthors MNRAS 325, 143–150 (2001) NASA ADS servise webpages: http://ccd.mii.cz http://var.astro.cz http://www.astronomie2009.cz http://en.wikipedia.org and others Your notes are welcome! zejda@physics.muni.cz

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