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Title:
ISO deep far-infrared survey in the ``Lockman Hole''. A search for obscured objects at high redshift. I. Observations
Authors:
Kawara, K.; Sato, Y.; Matsuhara, H.; Taniguchi, Y.; Okuda, H.; Sofue, Y.; Matsumoto, T.; Wakamatsu, K.; Karoji, H.; Okamura, S.; Chambers, K. C.; Cowie, L. L.; Joseph, R. D.; Sanders, D. B.
Affiliation:
AA( Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa Mitaka, Tokyo, 181, Japan; Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229, Japan; ISO Science Operations Centre, Astrophysics Division of ESA, Villafranca, E-28080 Madrid, Spain), AB(Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229, Japan; ISO Science Operations Centre, Astrophysics Division of ESA, Villafranca, E-28080 Madrid, Spain; Astronomical Institute, Tohoku University, Aoba, Sendai 980-77, Japan), AC(Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229, Japan; Department of Astrophysics, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-01, Japan), AD(Astronomical Institute, Tohoku University, Aoba, Sendai 980-77, Japan), AE(Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229, Japan), AF( Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa Mitaka, Tokyo, 181, Japan), AG(Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229, Japan), AH(Department of Physics, Gifu University, Gifu 501-11, Japan), AI(National Astronomical Observatory, 2-21-1 Osawa Mitaka, Tokyo 181, Japan), AJ(Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan), AK(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA), AL(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA), AM(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA), AN(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA)
Publication:
Astronomy and Astrophysics, v.336, p.L9-L12 (1998) (A&A Homepage)
Publication Date:
08/1998
Origin:
A&A
A&A Keywords:
GALAXIES: EVOLUTION, GALAXIES: STARBURST, COSMOLOGY: OBSERVATIONS, INFRARED: GALAXIES
Bibliographic Code:
1998A&A...336L...9K

Abstract

Two 44arcmin x 44arcmin fields in the Lockman Hole were mapped at 95 mu m and 175 mu m using ISOPHOT. A simple program code combined with PIA works well to correct for drift in the detector responsivity. The number density of 175 mu m sources is 3-10 times higher than expected from the no-evolution model. Based on observations with ISO, an ESA project with instruments funded by ESA member states (especially the PI countries: France, Germany, the Netherlands, and the United Kingdom) and with the participation of ISAS and NASA. The ISOPHOT data presented in this paper was reduced using PIA, which is a joint development by the ESA Astrophysics Division and the ISOPHOT consortium led by the Max Plank Institute for Astronomy (MPIA), Heidelberg.

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