Letter to the Editor
ISO deep far-infrared survey in the "Lockman Hole"
A search for obscured objects at high redshift. I. Observations
K. Kawara 1, 2, 3,
Y. Sato 2, 3, 4,
H. Matsuhara 2, 5,
Y. Taniguchi 4,
H. Okuda 2,
Y. Sofue 1,
T. Matsumoto 2,
K. Wakamatsu 6,
H. Karoji 7,
S. Okamura 8,
K.C. Chambers 9,
L.L. Cowie 9,
R.D. Joseph 9 and
D.B. Sanders; ** 9
Received 2 March 1998 / Accepted 22 May 1998
Two fields in the Lockman Hole were mapped at 95 µm and 175 µm using ISOPHOT. A simple program code combined with PIA works well to correct for drift in the detector responsivity. The number density of 175 µm sources is 3-10 times higher than expected from the no-evolution model.
Key words: galaxies: evolution galaxies: starburst cosmology: observations infrared: galaxies
* 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.
Send offprint requests to: K. Kawara (email@example.com)
© European Southern Observatory (ESO) 1998
Online publication: July 7, 1998