we propose to study the nature of the coldest sources observed by iras. the targets are only detected in the 100 micron iras band (with fnu > 4 jy in the main field and fnu > 1 jy in the reference field) or have a f60/f100 flux ratio of less than 0.2 which is the typical colour of diffuse cirrus clouds. we propose to obtain isophot 100 and 200 micron data of a sample of these sources. the sample is selected from two pre-defined regions on the sky.
Instrument
PHT22
Temporal Coverage
1998-01-17T23:09:35Z/1998-02-01T11:29:45Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's 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.
