Improving the identification of high-z Herschel sources with position priors and optical/NIR and FIR/mm photometric redshifts
Artikel i vetenskaplig tidskrift, 2010

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

gravitational lensing: strong

infrared: galaxies

infrared luminosity functions

spectral energy-distributions

submillimeter galaxies


cluster 1e0657-56





active galactic nuclei

submillimeter: galaxies

galaxies: high-redshift


galaxies: evolution

spitzer observations

star-formation history



P.G.P. Pérez-González

E. Egami

M. Rex

T.D. Rawle

J.P.J.P. Kneib

J. Richard

Daniel Johansson

Chalmers, Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik

B. Altiéri

A.W. Blain

J. J. Bock

F. Boone

C. R. Bridge

S. M. Chung

B. Clément

D. Clowe

F. Combes

J. G. Cuby

M. Dessauges-Zavadsky

C. D. Dowell

N. Espino-Briones

D. Fadda

A. K. Fiedler

A. Gonzalez

Cathy Horellou

Chalmers, Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik

O. Ilbert

R. J. Ivison

Mathilde Jauzac

D. Lutz

R. Pelló

M. J. Pereira

G. H. Rieke

G. Rodighiero

D. Schaerer

G. P. Smith

I. Valtchanov

G.L. Walth

P. van der Werf

M. W. Werner

M. Zemcov

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 518 Article Number: L15


Astronomi, astrofysik och kosmologi



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