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VStar Continues September 2010

VStar Continues September 2010. VStar. Intended to be an easy-to-use variable star data visualization and analysis tool. A SourceForge project licensed under GPL. Downloadable via VStar Team page. Testers, developers, documentation writers still welcome. Interactions. CSV, TSV files.

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VStar Continues September 2010

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  1. VStar ContinuesSeptember 2010

  2. VStar • Intended to be an easy-to-use variable star data visualization and analysis tool. • A SourceForge project licensed under GPL. • Downloadable via VStar Team page. • Testers, developers, documentation writers still welcome.

  3. Interactions CSV, TSV files VStar AAVSO International Database VSX (Variable Star Index)

  4. Example Driven Demo • Become familiar with VStar by example, optionally trying some features, follow-up. • Need Java 1.6 or higher installed. • Click “Download VStar Now” button on this page: • http://www.citizensky.org/teams/vstar-software-development

  5. Appearance Changes • Screenshots in slides to come are included to indicate key aspects of what attendees saw. • VStar’s appearance has changed slightly since Citizen Sky 2, mostly with respect to background plot color and additional information on phase and mean plots. • W Uma phase plots, eps Aur light curve, and omi Ceti polynomial fit show some of these changes.

  6. U ScorpiiRecurrent Nova in outburstPredicted by Dr Bradley SchaeferRapid magnitude rise and fall Barbara Harris Not U Sco, but another similar system: Artist’s rendition of recurrent nova RS Oph                      Image credit: David Hardy and PPARC Shawn Dvorak https://sites.google.com/site/aavsocvsection/

  7. Demo • Load U Sco from file • Observation details • Plot, table link • Zoom • Change visible series • Fainter-thans

  8. All U Sco data annotated with outbursts 1999 2010 1979 1987

  9. 2010 U Sco outburst Jan 28 Feb 2 Jan 27

  10. courtesy www.citizensky.org By Nico Camargo and courtesy www.citizensky.org By Brian Thieme and courtesy www.citizensky.org By Nico Camargo and courtesy www.citizensky.org

  11. Demo • Load Epsilon Aurigae from AID • Filter obscode (BDJB, MRV) • Save, print • Info • Preferences • Colors • New group: alpha Ori, del Cep, lx Cyg, omi Cet, x Cyg • Error bars • Mean series change, anova • Help (anyone interested in writing more docs?)

  12. W Uma (W UrsaeMajoris)Contact binary star8 hour period! http://www.citizensky.org/forum/w-uma-another-eclipsing-binary-star

  13. Demo • Load UMa from a file. • Phase plot with period 0.33363749 • Replot with period 0.333 • shows how much getting the period right matters

  14. Demo • Load X Cyg from file • Period analysis • Phase plot

  15. Demo • Plug-ins: extend VStar’s functionality. • http://www.citizensky.org/teams/vstar-software-development/example-vstar-plugins-jar-files-development-doc • Create vstar_plugins dir under: • Windows: C:\Documents and Settings\user • *nix: ~/user

  16. Demo • Mira (omi Cet) • Mean bins change • Polynomial fit model • try different degree values from 1..7

  17. polynomial fit with degree 7

  18. Chi Cygni http://en.wikipedia.org/wiki/Chi_Cygni Mira type pulsating variable post-Asymptotic Giant Branch Star (late stage red giant) 5th to 13th magnitude period: ~407 days http://www.youtube.com/watch?v=hhMeumI36BM

  19. Links • http://www.citizensky.org/teams/vstar-software-development • https://sourceforge.net/projects/vstar/ • http://www.citizensky.org/teams/vstar-software-development/vstar-citizen-sky-2-demo-data-files • http://www.citizensky.org/teams/vstar-software-development/example-vstar-plugins-jar-files-development-doc

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