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You can study extrasolar planet transits using sample data sets, data from the LCOGT observations archive, or data from Agent Exoplanet.
The videos below are screencasts taking you through the steps you need to follow as you learn to use SalsaJ and do photometry. Before viewing the screencasts, you may wish to download SalsaJ from the European Hands On Universe Website. (Until further notice, please download version 1.4, not version 2.0, which does not yet have full photometry features.)
Launch SalsaJ and download our lightcure plotter spreadsheet (you will need a spreadsheet application such as Excel, OpenOffice Spreadsheet or Numbers).
Download and unzip sample data for one of the extrasolar planets below:
How to choose a radius for photometry in SalsaJ:
How to do photometry with SalsaJ:
How to plot a light curve for an extrasolar planet transit:
Below are the main steps demonstrated by the screencast:
Open FITS files in SalsaJ.
Choose appropriate photometry and sky radii.
Measure the intensity of a target star and comparison stars and enter them into a spreadsheet.
Plot a lightcurve graph showing intensity over time for the transit.