Spitzer Observations of the North Ecliptic Pole

Abstract

We present a photometric catalog for Spitzer Space Telescope warm mission observations of the North Ecliptic Pole (NEP; centered at R.A. = 18 h 00 m 00 s , decl. = 66 d 33 m 38.ˢ552). The observations are conducted with IRAC in the 3.6 and 4.5 μ m bands over an area of 7.04 deg 2 , reaching 1 σ depths of 1.29 μ Jy and 0.79 μ Jy in the 3.6 μ m and 4.5 μ m bands, respectively. The photometric catalog contains 380,858 sources with 3.6 and 4.5 μ m band photometry over the full-depth NEP mosaic. Point-source completeness simulations show that the catalog is 80% complete down to 19.7 AB. The accompanying catalog can be used for constraining the physical properties of extragalactic objects, studying the AGN population, measuring the infrared colors of stellar objects, and studying the extragalactic infrared background light.