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Proceedings Paper

Analysis and visualization of multiwavelength spectral energy distributions in the NASA/IPAC extragalactic database (NED)
Author(s): Joseph M. Mazzarella; Barry F. Madore; Judy Bennett; Harold Corwin; George Helou; Anne Kelly; Marion Schmitz; Brian Skiff
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Paper Abstract

The NASA/IPAC Extragalactic Database (NED,http://ned.ipac.caltech.edu/) currently contains over 4.5 million photometric measurements covering the electromagnetic spectrum from gamma rays through radio wavelengths for objects that are being cross-correlated among major sky surveys (e.g., SDSS, 2MASS, IRAS, NVSS, FIRST) and thousands of smaller, but unique and important, catalogs and journal articles. The ability to retrieve photometric data (including uncertainties, aperture information, and references) and display spectral energy distributions (SEDs) for individual objects has been available in NED for six years. In this paper we summarize recent enhancements that enable construction of large panchromatic data sets to facilitate multi-dimensional photometric analysis. The database can now be queried for samples of objects that meet flux constraints at any wavelength(e.g., objects with any available 20cm flux, or objects with fν10μm] > 5.0Jy). The ability to utilize criteria involving flux ratios (e.g., objects with fν[20cm]/fν[60μm] > 0.5) is under development. Such queries can be jointly combined with additional constraints on sky area, redshifts, object types, or sample membership, and the data are output with consistent physical units required for comparative analysis. Some results derived from fused photometric data in NED are presented to highlight the large number and diversity of available SEDs.

Paper Details

Date Published: 19 December 2002
PDF: 11 pages
Proc. SPIE 4847, Astronomical Data Analysis II, (19 December 2002); doi: 10.1117/12.461048
Show Author Affiliations
Joseph M. Mazzarella, Jet Propulsion Lab. (United States)
Barry F. Madore, Jet Propulsion Lab. and Carnegie Institution of Washington (United States)
Judy Bennett, Jet Propulsion Lab. (United States)
Harold Corwin, Jet Propulsion Lab. (United States)
George Helou, Jet Propulsion Lab. (United States)
Anne Kelly, Jet Propulsion Lab. (United States)
Marion Schmitz, Jet Propulsion Lab. (United States)
Brian Skiff, Lowell Observatory (United States)


Published in SPIE Proceedings Vol. 4847:
Astronomical Data Analysis II
Jean-Luc Starck; Fionn D. Murtagh, Editor(s)

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