we propose to utilize the far-ir capability of isophot to measure at 120 and 200 microns selected areas near the galactic plane. the iso fine-pointing raster scan mode is used to get both accurate surface brightnesses as well as far-ir colour distributions over selected areas of ca. 4.5 degrees. the colour index 120 vs. 200 microns is an important indicator of very cold dust emission. our aim is especially to detect small very cold dust clouds suspected to be abundant in the outer part of our galaxy. such clouds would have escaped detection by iras and cobe because of these instruments had limitations in wavelength coverage or spatial resolution.
Instrument
PHT22
Temporal Coverage
1997-02-13T17:41:48Z/1997-07-15T04:00:52Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, Mattila et al., 1998, 'SEARCH FOR COMPACT VERY COLD DUST CLOUDS IN THE GALAXY', 1.0, European Space Agency, https://doi.org/10.5270/esa-8zpkpho
