SIMBAD references

We present submillimeter observations for 135 of the 370 X-ray sources detected in the 1 Ms exposure of the Chandra Deep Field-North. Nine of the X-ray sources are significantly detected in the submillimeter. The error-weighted mean 850 µm flux is significant at 1.21±0.27 mJy. This value shows little dependence on the 2-8 keV flux from 5x10^–16 to 10^–14 ergs.cm^–2.s^–1, but sources with brighter X-ray fluxes than this appear weak in the submillimeter. The ensemble of X-ray sources contribute about 15% of the extragalactic background light at 850 µm. The submillimeter excess is found to be strongest in the optically faint X-ray sources that are also seen at 20 cm, which is consistent with these X-ray sources being obscured and at high redshift (z>1).