AgDemoDec2004 Galactic

Brown Dwarf Search

BrownDwarfWorkflow

Screenshot of Brown Dwarf workflow

DATA

• Catalogues
  • This requires catalogues providing point source photometry for any given Galactic star cluster, e.g. the Pleiades, in at least one of optical R I Z bands or equivalent and at least two of IR J H K bands (i.e. at least 3 wavebands spaced between 0.7 and 2.2 micron) together with the necessary metadata (offsets to standard photometry and zeropoints etc.) to convert whatever the system actually is to the system used by Dahn et al. 2002.
  • INT-WSF and 2MASS source catalogues cover Pleiades.

USNO-B would give added value e.g. proper motions.

• Images
  • It would be more interesting also to be able to access optical e.g. INT-WFS images and look for faint/non detections at a list of positions.

TOOLS

* Image queries

• • Select images covering positions in a list (or could be entire field of interest) e.g. from INT-WFS.
  • Perform source extraction. Return list of values and compare with other tables.
• Database queries
  • Conditional selection
  • Cross-matching

OPERATIONS

• Analysis
  • Colour Cut
  • Simple mathematical operations on data and plot the results but this can be done using VOPlot or TopCat..

DraftRunThrough (old)

page retrieved from Google 5 Nov 2004