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Fig. 9

image

Observed flux ratio, fν(900)/fν(1400), as a function of V606 band magnitude. From the top left to bottom right: spectroscopically confirmed sources entering the range of redshift covered by NB3727, NB387, NB388, and NB396. Dashed (dot-dashed)(dot-dot-dashed) curves indicate the ratios between 1 (2)(3)σ background rms values and V-band flux. The symbol coding is the same as in Fig. 8. Black dots represent the eight AGN in our sample.

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