2MASS, SDSS and FIRST fluxes of QSOs (Labita+, 2008)

Details 2MASS, SDSS and FIRST fluxes of QSOs (Labita+, 2008) 2MASS, SDSS and FIRST fluxes of QSOs (Labita+, 2008)

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ycat..73831513l&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/383/1513. Originally published in: 2008MNRAS.383.1513L

Computer Science

Qsos, Photometry: Infrared, Photometry: Sdss, Redshifts

Scientific paper

Starting from a sample of Sloan Digital Sky Survey quasars appearing also in the Two-Micron All-Sky Survey, we study the continuum properties of ~1000 objects observed in eight bands, from near-infrared to ultraviolet. We construct the mean spectral energy distribution (SED) and compare and contrast the continua of radio-loud and radio-quiet quasar (RLQ and RQQ, respectively) objects. The SEDs of the two populations are significantly different, in the sense that RLQs are redder with power-law spectral indices RLQ>=0.55+/-0.04 and RQQ>=0.31+/-0.01 in the spectral range between 1014.5 and 1015.35Hz. This difference is discussed in terms of different extinctions, different disc temperatures, or slopes of the non-thermal component.
(1 data file).

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