Angular clustering of galaxies at 3.6 microns from the Spitzer Wide-area Infrared Extragalactic (SWIRE) survey

We present the first analysis of large-scale clustering from the Spitzer Wide-area Infrared Extragalactic legacy survey (SWIRE). We compute the angular correlation function of galaxies selected to have 3.6 mum fluxes brighter than 32 muJy in three fields totaling 2 deg(2) in area. In each field we detect clustering with a high level of significance. The amplitude and slope of the correlation function is consistent between the three fields and is modeled as w(theta) = Atheta(1-gamma) with A = (0.6 +/- 0.3) x 10(-3), gamma = 2.03 +/- 0.10. With a fixed slope of gamma = 1.8, we obtain an amplitude of A = (1.7 +/- 0.1) x 10(-3). Assuming an equivalent depth of K approximate to 18.7 mag we find that our errors are smaller but our results are consistent with existing clustering measurements in K-band surveys and with stable clustering models. We estimate our median redshift z similar or equal to 0.75, and this allows us to obtain an estimate of the three-dimensional correlation function xi(r), for which we find r(0) = 4.4 +/- 0.1 h(-1) Mpc.