SED Builder

1
SED Builder

• David Floyd
• August Muench
• Tara Murphy
• Paresh Prema
• Rita Sinha

2
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.

3
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.

4
Algorithm (cont) Work Flow.
5
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.

6
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.

7
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