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Title:
Constraints on the accuracy of photometric redshifts derived from BLAST and Herschel/SPIRE sub-mm surveys
Authors:
Aretxaga, Itziar; Hughes, David H.; Chapin, Edward; Gaztañaga, Enrique
Affiliation:
AA(INAOE, Aptdo. Postal 51 y 216, 72000 Puebla, Mexico), AB(INAOE, Aptdo. Postal 51 y 216, 72000 Puebla, Mexico), AC(INAOE, Aptdo. Postal 51 y 216, 72000 Puebla, Mexico), AD(INAOE, Aptdo. Postal 51 y 216, 72000 Puebla, Mexico)
Publication:
EXPERIMENTAL COSMOLOGY AT MILLIMETRE WAVELENGTHS: 2K1BC Workshop. Breuil-Cervinia, Valle d'Aosta, Italy, 9-13 July, 2001. Edited by Marco De Petri and Massimo Gervasi. American Institute of Physics, 2002. AIP Conference Proceedings, Volume 616, pp. 354-356 (2002). (AIPC Homepage)
Publication Date:
05/2002
Origin:
STI
PACS Keywords:
Distances, redshifts, radial velocities; spatial distribution of galaxies, Photometric, polarimetric, and spectroscopic instrumentation, Submillimeter
Comment:
ISBN: 0735400628
DOI:
10.1063/1.1475657
Bibliographic Code:
2002AIPC..616..354A

Abstract

More than 150 galaxies have been detected in blank-field millimetre and sub-millimetre surveys. However the redshift distribution of sub-mm galaxies remains uncertain due to the difficulty in identifying their optical-IR counterparts, and subsequently obtaining their spectroscopic emission-line redshifts. In this paper we discuss results from a Monte-Carlo analysis of the accuracy with which one can determine redshifts from photometric measurements at sub-millimetre-FIR wavelengths. The analysis takes into account the dispersion in colors introduced by including galaxies with a distribution of SEDs, and by including photometric and absolute calibration errors associated with real observations. We present examples of the probability distribution of redshifts for individual galaxies detected in the future BLAST and Herschel/SPIRE surveys. We show that the combination of BLAST and 850 μm observations constrain the photometric redshifts with sufficient accuracy to pursue a program of spectroscopic follow-up with the 100 m GBT. .
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