we propose sws full scan observations of 10 evolved stars and two objects with unusual spectra which have been observed by two spectrometers on board the irts, a japanese infrared satellite operated in the spring of 1995. the main goal of this program is to obtain high quality spectra of some representative objects in the irts data, and to apply the knowledge gained from the high resolution iso data to the thousands of irts spectra, which will enable us to investigate the infrared properties of all the irts objects from a statistical point of view. the spectrometers on the irts covered a wavelength range from 1.4 to 12 microns. much of this range cannot be observed from ground based facilities. the irts mission surveyed 7% of the sky and detected more than ten thousands point sources. however, the spectral resolution of irts data are not high enough for the detailed studies of these infrared sources. high-resolution spectra taken by iso/sws can help our quantitative interpretation of the irts spectra. two unusual objects have been found. both of them show sharp and strong emission feature at 9 micron, which have never been identified with any molecular or dust features. we propose to search another features associate to these objects in the sws spectra up to 45 micron. such data will be a key information to study the origin of this 9 micron feature. iso/sws is presently the only instrument available with the same wavelength coverage as the irts spectrometers. the irts and the iso/sws capabilities are complementary and combining the results from each will maximize the scientific results.
Instrument
SWS01 , SWS06
Temporal Coverage
1997-04-25T04:01:01Z/1997-05-12T04:46:18Z
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.
