Improving the identification of high-z Herschel sources with position priors and optical/NIR and FIR/mm photometric redshifts
Journal article, 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
bullet
cluster 1e0657-56
multiwavelength
photometry
deep-field-south
galaxies:
active galactic nuclei
submillimeter: galaxies
galaxies: high-redshift
galaxies
galaxies: evolution
spitzer observations
star-formation history
forming
Author
P.G.P. Pérez-González
E. Egami
M. Rex
T.D. Rawle
J.P.J.P. Kneib
J. Richard
Daniel Johansson
Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics
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, Department of Radio and Space Science, Radio Astronomy and Astrophysics
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: L15Subject Categories
Astronomy, Astrophysics and Cosmology
DOI
10.1051/0004-6361/201014593