Infrared properties of radio-selected submillimeter galaxies in the Spitzer First Look Survey verification field

We report on submillimeter and infrared observations of 28 radio-selected galaxies in the Spitzer First Look Survey verification field. All of the radio-selected galaxies that show evidence for emission at 850 mum with SCUBA have Spitzer counterparts at 24 mum, while only half of the radio-selected galaxies without 850 mum emission have detectable counterparts at 24 mum. The data show a wide range of infrared colors (S-70 mum/S-24 mum < 5 - 30, S-8 mu m/S-3.6 mu m < 0.3-4), indicative of a mixture of infrared-warm AGN-dominated and cooler starburst-dominated sources. The galaxies showing 850 mum emission have Spitzer flux densities and flux density ratios consistent with the range of values expected for high-redshift (z = 1-4) ultraluminous infrared galaxies.