Presentation on theme: "SED Builder David Floyd August Muench Tara Murphy Paresh Prema Rita Sinha."— Presentation transcript:
SED Builder David Floyd August Muench Tara Murphy Paresh Prema Rita Sinha
Motivation Need for federating NVO clients Utility of spectral energy distributions for most niches of astrophysical research: stars, galaxies, QSOs Goal: Build a broad band SED for an object using NVO web services. Focus on SkyNodes.
Algorithm GetSed.py: –Written in python; –Uses Kwok volib python libraries; –Implemented GetSedSkyNode module; –Queries SkyPortal directly with ADQL/s; –Uses lookup dictionary to identify photometry and perform conversions. Calls IDL procedure to fit spectrum and estimate bolometric luminosity.
Problems SkyNodes! –Some include column names like min, or confuse? that trip the ADQL query; –Some (e.g., GOODS) have essentially no curation information; –Some (e.g., GALEX, FUSE) simply didnt respond. Manual parsing of table metadata using a dictionary instead of on the fly UCD parsing.
Future Work Improved SED Modeling. Output Proper VOTables w/SSAP. GetSedTab –Queries tabular sky services; –WCSCatFix checks/fixes astrometry of tables; –Requires (extensive) UCD parsing. GetSedSIAP –Derive upper limits on NVSS/FIRST cutouts; –Process other image archive services.
Targets 3C293 NGC1068 M31 M33 Mrk78 Perssons Star FU Ori 587733412056465497 –213.75159 52.116272 –0.424 587733412056530956 –213.89122 52.09946 –0.986 587733399708172309 –214.17679 52.30352 –1.284 587733399171301410 –213.965 52.007126 –1.514