# The Atacama Cosmology Telescope: A Measurement of the Thermal Sunyaev-Zel\'dovich One-Point PDF

@article{Hill2014TheAC, title={The Atacama Cosmology Telescope: A Measurement of the Thermal Sunyaev-Zel\'dovich One-Point PDF}, author={J. Hill and B. Sherwin and K. Smith and G. Addison and N. Battaglia and E. Battistelli and J. Bond and E. Calabrese and M. Devlin and J. Dunkley and R. Dunner and T. Essinger-Hileman and M. Gralla and A. Hajian and M. Hasselfield and A. Hincks and R. Hlozek and J. Hughes and A. Kosowsky and T. Louis and D. Marsden and K. Moodley and M. Niemack and L. Page and B. Partridge and B. Schmitt and N. Sehgal and J. Sievers and D. Spergel and S. Staggs and D. Swetz and R. Thornton and H. Trac and Edward J. Wollack}, journal={arXiv: Cosmology and Nongalactic Astrophysics}, year={2014} }

We present a measurement of the one-point probability distribution function (PDF) of the thermal Sunyaev-Zel'dovich (tSZ) decrement in the pixel temperature histogram of filtered 148 GHz sky maps from the Atacama Cosmology Telescope (ACT). The PDF includes the signal from all galaxy clusters in the map, including objects below the signal-to-noise threshold for individual detection, making it a particularly sensitive probe of the amplitude of matter density perturbations, $\sigma_8$. We use a… CONTINUE READING

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