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.

VStarVStar VStarVStar

AAVSO AAVSO International International

DatabaseDatabase

AAVSO AAVSO International International

DatabaseDatabase

VSXVSX(Variable (Variable

Star Index)Star Index)

VSXVSX(Variable (Variable

Star Index)Star Index)

CSV, CSV, TSV TSV filesfiles

CSV, CSV, TSV TSV filesfiles

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-softwar

e-development

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.

https://sites.google.com/site/aavsocvsection/

Not U Sco, but another similar system:Artist’s rendition of recurrent nova RS Oph 

                    Image credit: David Hardy and PPARC

Barbara Harris

Shawn Dvorak

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

1979

1987

1999 2010

Jan 28

Jan 27

Feb 2

courtesy www.citizensky.org

By Brian Thieme and courtesy www.citizensky.org

By Nico Camargo and courtesy www.citizensky.org

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?)

http://www.citizensky.org/forum/w-uma-another-eclipsing-binary-star

Load UMa from a file. Phase plot with period 0.33363749 Replot with period 0.333

shows how much getting the period right matters

Load X Cyg from file Period analysis Phase plot

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

Mira (omi Cet) Mean bins change Polynomial fit model

try different degree values from 1..7

polynomial fit with degree 7

http://www.youtube.com/watch?v=hhMeumI36BM

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.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