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The Field 287 analysis tool.

• General - summarises various statistical properties of the dataset, including ranges of attributes and typical photometric errors;
• Sample selection - defines sample selection criteria by position, variability or classification as a known QSO etc, tabulating sample selections and allowing plotting of light-curves;
• Source specific - allows detailed visualisation of light curves and colour curves for individual objects identified by position or source identifier

Example usage: plot B-band light curves for a sample of known QSOs lying within 20 arcminutes of a given position, and then select one object for which to plot full UBRI light and U-B, B-R and R-I colour curves:

• Launch the tool (if downloading and saving locally, invoke on the command line using java -jar F287_Analysis_Tools.jar.): a pop-up window appears with 3 options.
• Press the "Sample Selection" button and click "OK: a new control panel pops up."
• Press "KnownQSO Sample Selection", passband "B (Blue)", select the sexagesimal tab and enter "21 40 00.0" for RA and "-45 00 00.0" for Dec with "Angular radius" 1200 arcsec (=20 arcmin); click on "Generate": after a short time a results table pops up with 8 quasars.
• Click on any object in the results table, for example "Q 2135-4530" (Spectroscopic redshift 0.308) and then click on "Generate Light Curve": a plot of the B band magnitude versus time pops up.
• Note that this object has source ID 310912; click "Back" on the sample selection control panel to return to the top-level panel, and this time select "Source Specific" to pop-up that control panel.
• Input 310912 into "Source ID" in the direct search box; select all passbands (UBRI); select class "Star" for point-source magnitudes; and finally in the plots pane select all options for light curves and colour curves from all available passbands along with error bars.
• Click on "Generate": two new plots will pop up (move the colour plot aside to see the light curves beneath).