The Near Infrared Spectrograph (NIRSpec) on board of the James Webb Space Telescope (JWST) will be equipped with an Integral Field Unit (IFU) which will allow the two-dimensional spectral characterization of astronomical objects with unprecedented depths, especially in the 2-5 micron wavelength range. In particular, NIRSpec-IFU observations of high

SPIRE, the Spectral and Photometric Imaging Receiver, is one of three instruments to fly on the European Space Agency's Herschel Space Observatory. It contains a three-band imaging photometer operating at 250, 350 and 500 μm, and an imaging Fourier transform spectrometer covering 194-672 μm. The SPIRE detectors are arrays of feedhorn-coupled

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The distribution of bar strengths in disk galaxies is of fundamental importance in studies of galaxy evolution for two reasons. First, bars are the most important morphological features of galaxies that cross the spiral-S0 divide. They are a potentially fruitful way of comparing these two classes of disk galaxies and perhaps for better

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This proposal is a resubmission of an accepted RXTE AO 11 proposal. Our aim is to test evolutionary and type I burst models with the observed type I X-ray burst behaviour of the bright ultra-compact binary system 4U 1820-30. The short orbital period suggests that the companion white dwarf is hydrogen deficient, with evolutionary models predicting a