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We present the Herschel-SPIRE photometric atlas for a complete flux limitedsample of 43 local Ultraluminous Infrared Galaxies (ULIRGs), selected at60${\mu}$m by IRAS, as part of the HERschel ULIRG Survey (HERUS). Photometryobservations were obtained using the SPIRE instrument at 250, 350 and500${\mu}$m. We describe these observations, present the results, and combinethe new observations with data from IRAS to examine the far-IR spectral energydistributions (SEDs) of these sources. We fit the observed SEDs of HERUSobjects with a simple parameterised modified black body model where temperatureand emissivity $\beta$ are free parameters. We compare the fitted values tothose of non-ULIRG local galaxies, and find, in agreement with earlier results,that HERUS ULIRGs have warmer dust (median temperature T = 37.9+/-4.7 Kcompared to 21.3+/-3.4 K) but a similar $\beta$ distribution (median $\beta$ =1.7 compared to 1.8) to the Herschel reference sample (HRS, Cortese et al.,2014) galaxies. Dust masses are found to be in the range of 10^7.5 to 10^9 Msunsignificantly higher than that of Herschel Reference Sample (HRS) sources. Wecompare our results for local ULIRGs with higher redshift samples selected at250 and 850${\mu}$m. These latter sources generally have cooler dust and/orredder 100-to-250 ${\mu}$m colours than our 60${\mu}$m-selected ULIRGs. We showthat this difference may in part be the result of the sources being selected atdifferent wavelengths rather than being a simple indication of rapid evolutionin the properties of the population.

HERUS: The Far-IR/Submm Spectral Energy Distributions of Local ULIRGs & Photometric Atlas