... What drives the selection of the next mission: science drivers or technical capability? ... Giga- missions ( + $1B) should start with the question (TPF) NASA needs both kinds Examples: Copernicus FUSE · (coatings, detectors ) · local astronomy galactic astronomy · next generation extragalactic FUV IUE GHRS STIS COS COBE MAP Generic UV - 0ptical Technology Drivers Optics: · · · · · size with high figure quality size w/o high figure quality ultra-low scatter efficient wide field designs better...

... High-resolution Herschel spectroscopy reveals the proto-planetary disk around the young star T Tau N . ... A study led by Linda Podio ( AstroFIt fellow at the Arcetri Observatory) with Inga Kamp (Kapteyn Institute, the Netherlands), Claudio Codella (Observatory of Arcetri) and other collaborators from Grenoble, UK and USA, makes use of high-resolution spectroscopic observations with HIFI on board the Herschel space observatory to characterize the disk around the young star T Tau N . ...

... For high spectral resolution observations the devices permanently located at the N2 focus of the BTA are used (Klochkova, 1995, Panchuk, 1995). However for a number of tasks to be performed, it is needed to rule out the influence of the second and third mirrors, i.e. to realize the high spectral resolution ( ) directly at the prime focus. ... Examine the principal parameters of the PF echelle spectrometer, which is equivalent in spectral resolution to the CCD-equipped MSS (Panchuk, 1995). ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

... The collecting area is increased by nesting concentric mirror pairs, all having the same focal length. ... Figure shows the largest optical element being ground at HDOS. ... X-ray testing demonstrated that the CXO mirrors are indeed the largest high-resolution X-ray optics ever made; the nominal effective area (based on the ground calibrations) is shown as a function of energy in the left panel of Figure , along with those of their Einstein and ROSAT predecessors. ...

The power levels needed in the post amp system are computed using a Tsys, bandwidth, and fiber optic xmter noise temperature. ... 300 Mhz . ... Dewar Gain . ... fiber optic xmter noise floor ( fiber xmter ) . 130 dBm/Hz . ... 1. input to the dewar . ... 3. noise floor fiber optic xmter over 300 Mhz. -45 dBm . ... Signal power needed to be 20 db above the fiber optic noise floor . ... At the input to the dewar: 30 K Tsys and 300 Mhz bandwidth gives: -198.6+ 15(30K) + 85(300Mhz)=-98.6 dBm . ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Phase range for plots: -0.5 to 1.0 0.0 to 2.0 0.0 to 1.0 . ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... Two period search methods are currently implemented. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . ...