we request 7.7 hours of supplemental observing time in order to re-observe key early-release vega-disk sources that suffered from inadequate signal to noise observations during the early months of iso science operations. the 20 selected main sequence stars are part of our nasa guarranteed time program intended to determine the frequency of mid-infrared excesses among a volume-limited sample. we invested 18.8ksec in early release observations, but have not achieved useful s/n with p3 detector chopping observations. we request the opportunity to reobserve these objects using c100 chopping mode, (p22 and p37) which has proven successful as our current observing strategy with this program. > in this proposal, more time is being requested for rstencel.vegadisk
Instrument
PHT03 , PHT22 , PHT37 , PHT38 , PHT39
Temporal Coverage
1997-03-11T12:11:45Z/1997-05-03T10:21:34Z
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.
