NASA's Kepler mission will fly a photometer based on a wide-field Schmidt camera with a 0.95 m aperture, staring at a single field continuously for at least 4 years. Although the mission's principal aim is to locate transiting extrasolar planets, it will provide an unprecedented opportunity to make asteroseismic observations on a wide variety of stars. Plans are now being developed to exploit t...

Powell (1953) introduced a method for the estimation of serum calcium using the EEL flame photometer, and claimed that it gave results in good agreement with a standard titrimetric procedure. In this laboratory, both these methods were found to give low results when tested against standard sera, prepared by adding known amounts of calcium to serum completely decalcified by treatment with a cati...

A standard reference test site is flown using the DAIS 7915 imaging spectrometer over Central Switzerland. Simultaneous to this overflight extensive ground measurements are carried out. A sun photometer, a radiosonde, and two spectroradiometers are used simultaneously during the overflight to support the in– flight calibration and validation of the DAIS 7915. The calibration of all instruments ...

We have measured the infrared transit of the extrasolar planet HD209458 b using the Spitzer Space Telescope. We observed two primary eclipse events (one partial and one complete transit) using the 24 μm array of the Multiband Imaging Photometer for Spitzer (MIPS). We analyzed a total of 2392 individual images (10-second integrations) of the planetary system, recorded before, during, and after t...

We mapped at 25 μm five≈0.5◦×0.5◦ fields at low, intermediate and high ecliptic latitude with the photometer onboard the Infrared Space Observatory. The goal was to search for potential structures in the zodiacal light. No structures were seen in these five sample fields. For an aperture of 3′ diameter we find an upper limit for the underlying rms brightness fluctuations of±0.2%, which correspo...