4, a simple halo model is employed to interpret the measured QSO – CIB cross-correlation signal and constrain the HODs of quasars in halos that also host star-forming galaxies. Further discussion and conclusions of our results are given in Section 5. We assume an $H_0=70$ km s$^{-1}$ Mpc$^{-1}$, $\Omega_{\rm M}=0.3$, and $\Omega_{\Lambda}=0.7$ cosmology and use the AB magnitude scale throughout the paper.

Data
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![image](fig1_image.eps){height="5.5in" width="7.in"}

*Herschel*-SPIRE maps
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We use CIB maps at 250, 350, and 500 $\micron$ (1200, 857, and 600GHz, respectively) from the two *Herschel* surveys in the SDSS Stripe 82 region, i.e. the *Herschel* Stripe 82 Survey (HerS[^3]; Viero et al. 2013b) and the HerMES[^4] Large-Mode Survey (HeLMS; Oliver et al. 2012). Maps were observed with the Spectral and Photometric Imaging Receiver (SPIRE) instrument (Griffin et al. 2010) aboard *Herschel*. HeRS covers 79 deg$^2$ along the SDSS Stripe 82 to a 5-$\sigma$ depth of 65.0, 64.5 and 74.0 mJy beam$^{-1}$ at 250, 350 and 500 $\micron$, respectively. HeLMS covers 270 deg$^2$ to a a 5-$\sigma$ depth of 64.0, 53.0 and 76.5 mJy beam$^{-1}$ at 250, 350 and 500 $\micron$. The joint HeRS and HeLMS areal coverage between -10$^{\circ}$ and 37$^{\circ}$ (RA) covers the full $\sim 150\, 