The Reuven Ramaty High Energy Spectroscopic Imager (RHESSI) has justcompleted a successful second anneal of its high-resolution germaniumdetectors to reduce the effects of radiation damage. RHESSI's overallsolar hard x-ray performance is now even better than when it was newlylaunched. Because there is some residual damage, the resolution fornuclear gamma-ray lines is still degraded, but the instrument is in goodcondition for continuum spectroscopy of non-solar sources like cosmicgamma-ray bursts and terrestrial gamma-ray flashes. See RHESSI ScienceNugget #127 at tohban/wiki/index.php/RHESSI_Science_Nuggetswhere you can also find short articles on a variety of RHESSI sciencetopics.
Fermi E/PO NewsFermi has been highlighted in Epo's Chronicles 2010 Special Episodes for March, and will be a part of the 2011 Epo's Chronicles Calendar. ( ) The Fermi Race Card Game has recently been showcased at the Northern California Boy Scouts of America Centennial Anniversary Jamboree and Expanding Your Horizons (for eighth grade girls).
hot 8th grade girls naked pics
There was an IXO Science meeting in Paris at the end of April. The presentations from the meeting can be found at: main topics of the meeting were recent results and preparations for the ESA Cosmic Visions 2015-2025 (CV2015) process, with an emphasis on synergies between IXO and other future observatories. The science, technology and programmatic input is collected into a 'Yellow Book' which is the submission to the CV2015 process. The science section draws from the white papers and 'Requests for Information' (RFIs) that were written for the Astro2010 process, and also includes new information. This section is in draft form and will continue to be developed over the next few months. The technology section will be based largely on the two parallel industry studies that ESA is currently carrying out. Final report from the CV2015-2025 process is expected about June 2011.Upcoming events include a series of IXO presentations at the SPIE meeting, 'Astronomical Telescopes and Instrumentation 2010' which will take place in San Diego the end of June 2010. Talks will cover the overall observatory, instrumentation (including the expected background), optics, mission operations, and other topics. As usual, these talks will be available on the IXO website ixo.gsfc.nasa.govTechnology development efforts are continuing, with progress on both optics technologies (slumped glass and silicon pore optics). X-ray pencil beam tests of the SPO optics are now finding 9'' HEW/PSF (two reflections) for small stacks of plates mounted in a flight-like mirror module. As a reference, in 2007 similar tests measured 17'' HEW/PSF. Upgrades to the Bessy-II and MPE/Panter X-ray test facilities are underway to accommodate the 20m focal length of the IXO optics, and will allow full beam test in the fall of 2010. X-ray test of the slumped glass optics found 16'' HEW/PSF in 2008, and optical metrology is now measuring 6.5'' HEW/PSF. These optics will be tested in the GSFC X-ray test facility before the end of 2010. A separate study of slumped glass optics is underway at MPE (Germany) and Brera (Italy) which would use connecting/reinforcing ribs to assemble mirror modules, similar to the NuStar method. The IXO Telescope Working Group will hold its next meetings in June (Brera) and December (Prague)to assess progress and to review and update the technology development plans for both types of optics.The XMS team is fabricating 32x32 pixel demo arrays, with the correct pitch and close to the 40x40 extent needed for the inner high resolution array for the XMS. Preparations are continuing for a 3-column x 32-row multiplexing readout demonstration of such an array. Back to Top 2ff7e9595c
Комментарии