... We have investigated the status of the EPIC thin and medium filters by performing an analysis of the optical loading in the PN offset maps to gauge variations in the optical and UV transmission of the filters. We both investigated repeated observations of single optically bright targets and performed a statistical analysis of the extent of loading versus visual magnitude at different epochs. ... DATA ANALYSIS The PN offset maps are uploaded on board at the start of each exposure. ...
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Ссылки http://xmm.vilspa.esa.es/docs/documents/CAL-TN-0193-1-0.pdf -- 565.8 Кб -- 21.10.2013 Похожие документы
... John Stephen Young . ... These results, described in Chapters 5-8, include high-quality images of Capella and Betelgeuse, and a large number of diameter measurements of Mira variables. ... Chapter 5 describes the procedures used when observing with COAST in the infrared, illustrated by observations of the binary star Capella. ... Chapter 7 presents the results of a programme to monitor the angular diameter of the Mira variable star chi Cygni. ... Astron. ... PhD thesis, University of Cambridge, 1995...
... Ce qui est admirable, ce n'est pas que le champ des Гїtoiles soit si vaste, c'est que l'homme l'ait mesurГї" , Гїcrivait Anatole France. ... La question reprend souvent l'image du moyen mnГїmotechnique le plus marquant, utilisГї par les vulgarisateurs pour parler de la profondeur des gouffres cosmiques : est-il vrai que nombre d'Гїtoiles visibles dans le ciel sont dГїjГ mortes ? ... La nuit risque d'Г?tre trop courte pour dГїrouler le fil d'Ariane des distances dans l'Univers ! ...
... Sidereal Times is Available as a Blog! ... David Lecther, Outreach Coordinator Bob Vanderbei Richard Gott, III On January 11, we will have our own Dr. Ken Kremer to speak on "The Space Shuttle, The Space Station, and What's Beyond for NASA." ... Credit: Ken Kremer Page 3 December 2010 Amateur Astronomers Association of Princeton from historical units in which each magnitude is 2.5 times brighter than the next, and the span of all stars visible to the naked eye are 1 to 6 (1 is brightest). ...
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Ссылки http://www.princetonastronomy.org/newsletters/12_2010sidereal.pdf -- 835.2 Кб -- 08.12.2010 Похожие документы
... STAR FIELDS Newsletter of the Amateur Telescope Makers of Boston Including the Bond Astronomical Club Established in 1934 In the Interest of Telescope Making & Using Vol. ... I must admit, I have always been a planetary observer/imager but I can still be wowed by looking at a deepsky object as I was when I was at the clubhouse last Friday night (March 19th). ... March Meeting Minutes . ... April 17, 18 Clubhouse Work Party Sat., ... Star parties are a great venue for recruting new members. ...