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We present preliminary results about the detection of high redshift (U)LIRGsin the Bullet cluster field by the PACS and SPIRE instruments within theHerschel Lensing Survey (HLS) Program. We describe in detail a photometricprocedure designed to recover robust fluxes and deblend faint Herschel sourcesnear the confusion noise. The method is based on the use of the positions ofSpitzer/MIPS 24 um sources as priors. Our catalogs are able to reliably (5sigma) recover galaxies with fluxes above 6 and 10 mJy in the PACS 100 and 160um channels, respectively, and 12 to 18 mJy in the SPIRE bands. We also obtainspectral energy distributions covering the optical through thefar-infrared/millimeter spectral ranges of all the Herschel detected sources,and analyze them to obtain independent estimations of the photometric redshiftbased on either stellar population or dust emission models. We exemplify thepotential of the combined use of Spitzer position priors plus independentoptical and IR photometric redshifts to robustly assign optical/NIRcounterparts to the sources detected by Herschel and other (sub-)mminstruments.

Improving the identification of high-z Herschel sources with position priors and optical/NIR and FIR/mm photometric redshifts