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Active Galactic Nuclei Selected from GALEX Spectroscopy: The Ionizing Source Spectrum at z ∼ 1

  • Authors: Amy J. Barger and Lennox L. Cowie

BARGER & COWIE 2010 The Astrophysical Journal 718 1235.

  • Provider: AAS Journals

Caption: Figure 1.

Number counts of the GALEX AGNs in the redshift interval z = 0.65–1.25 vs. NUV magnitude (black squares with 1σ errors based on the number of sources in each bin). The blue triangles show the values if we also include the unclassified sources in this redshift interval. For comparison, we show the number counts of an X-ray-selected sample in a 0.9 deg 2 area (the CLANS and CLASXS fields) with red diamonds and in a smaller but much deeper 200 arcmin 2 area (the CDF-N) with purple diamonds. Over the magnitude range of the GALEX grism data, the GALEX AGN number counts agree well with the X-ray-selected AGN number counts and are well fit with a slope of 0.4 (blue dashed line). Thus, each magnitude bin contains roughly equal light density.

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