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. Next: SELECT/ROMAFOT Up: How to use Previous: How to use . SELECT/ROMAFOT . FIT/ROMAFOT . ANALYSE/ROMAFOT . Pascal Ballester . Tue Mar 28 16:52:29 MET DST 1995

... Tiny Tim HST PSF Modeling Page . For a comprehensive discussion of HST focus and PSF modeling, and a web-based procedure for modeling a PSF at a particular time (focus value) please see the . ... For an overview of the difficulties dealing with the field dependence and large angle scattering in WFPC2, take a look at my conference proceeding "WFPC2 Ghosts, Scatter, and PSF Field Dependence" from the "Calibrating Hubble Space Telescope: Post Servicing Mission" Workshop, May 15 - 17, 1995. ...

... The procedure involves fitting the point-spread function to one or more sources by a least-squares fit. The background can either be determined in the fit, or a fixed background value. ... For more details of the PSF fitting method please refer to the documentation on the SAS task omphotom . The weighting scheme used in the fitting can be either 1/pixel variance or 1 (equal weights). For information about how the latter is done, please refer to the documentation for the SAS task omphotom . ...

Next: Raymond Model Up: *fit* - Fit Data Previous: *fit* - Fit Data . The power law model with galactic absorption will be applied to ROSAT data the extracted earlier The results will be stored in the _prd table in the current directory. input files: rp90_obs.tab, rp90_soh.tab, rp_boh.tab . output file: rp90_prd.tab . ... NOTE: The rp_boh.tab file is not needed for the calculation of the fitted model. ... for help: abs(19:21)*pow(0.5:1.5) # IRAF will not # accept .5 as a valid fraction. ...

Pointing data from may08 and jun08 was used to check the telescope pointing (for some reason no data was taken feb08 thru apr08.. ... Page 1: pointing errors all data.Top two plots are za errors vs (za,az). ... Page 6: fit 1,3az terms to the az and za errors. Top: the az errors (black) with a 1az, and 3 az fit (red *). 2nd: za errors (black) with a 1 az and 3 az fit (red *). 3rd: PntErrs - fit residuals vs azimuth . ... Page 7:Fit residuals (Measured Pointing errors - fit) plotted by source. ...

Operations in Point operations use the pointer to query sets about points, delete points in a set, and move points. In all cases where interaction is required, pressing the right mouse button with the pointer in the drawing area cancels the operation. ... Report on a point in a set . ... Press the left mouse button. ... Press Delete point with the left mouse button to activate. ... Move the pointer to the new location and press the left mouse button again to register the point's new location. ...

Next: PN3DB and NOPN3DB Up: Details of SCHED Parameters Previous: PLOT Contents . POINT is used to tell SCHED to convert this scan to a reference pointing scan. If the argument is zero (which is the value it will get if POINT is specified without an argument), all stations that are in any group and have appropriate frequencies as specified in the PEAKFILE (see also PEAKINIT ) will be used. ... POINT=-1 means don't add a pointing scan even if you can. ... None means zero. ... Example: POINT=2 . ...

SINGULAR POINTS IN THE SOLAR CHROMOSPHERE . ... In the structure of the solar chromosphere, containing information on the configuration of the magnetic field, we have found and identified all the main types of the singular points ( see Fig. 1 ), which are known as inherent features of the 2-D vector field. ... The main types of the singular points are the node, the focus, the center, and the saddle. ... Singular point of the focus type in the solar chromosphere. ...

Next: Average Up: Quick Guide Previous: Reduce the background data Contents . ... Load all data if you have sufficient memory (this may take a few moments). ... Use R EDUCE P OINT D ATA I MAGING PLOT to plot and edit the point data data in much the same way as you did with the background data. ... Use plots vs channel if you have to flag several entire channels. Use the PLOT A UTO option to automatically edit outliers in PhotonRate and VisSq (select all channels for speed). ...

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

... Ignacio Ugarte Urra's PhD thesis topic is the investigation of coronal bright points. In his first paper (in collaboration with Gerry Doyle and Maria Madjarska) he investigated the formation, evolution and decay of a coronal bright point via a spectroscopic analysis of its transition region counterpart and the evolution of the underlying magnetic bipole during 3 days of almost continuous observations. ... In general the bright point has a radiance 4 times higher than that of the network. ...

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

. Search this album . Gallery . :: Stromlo before the 2003 fires . :: Photos taken by Olin Eggen . :: Telescope pointing system . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . View full size . Title: Telescope pointing system . File name: aus44.jpg . Owner: Gallery Administrator . Dimensions: 675 x 900 px . Page: 1 2 39 40 41 42 43 44 45 46 47 48 . Powered by Gallery 3.0.9 (Chartres) . Login

... Топы . ... Светильники для общественных помещений . ... Артикул: С5815А-2Цвет: темно-коричневыйМатериал верха: натуральная кожаМатериал подкладки: натуральный мехМатериал стельки : натуральный мехМатериал подошвы : синтетикаОписание: теплые сапожки из натуральной кожи с натуральным мехомРазмеры: для размера 36/36: толщина подошвы 2-3 см, ширина носка стельки 10,5 см, длина подошвы 25,6 смдля размера 37/37: толщина подошвы 2-3 см, ширина носка стельки 10,5 см, длина ...

In this method the fields outside and inside a particle are represented by expansions in term of proper basis functions (practically always the vector spherical harmonics). Since the particle surface does not coincide with the coordinate surface, it is impossible to satisfy the boundary conditions exactly, and the expansions are limited by a finite number of terms, and the boundary conditions are considered in a finite set of points (matching points). ...

ATM Forum Message . ... 9 Point Cell . ... You really don't need a 9 point cell for the mirror unless the last of the dobs used a much thinner piece of glass for the mirror. A regular 3 point cell will work just fine and will be distorting the glass a lot less than the probable errors in the mirror surface are by a huge margin. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Киевский клуб любителей астрономии "Астрополис" > . ... Оборудование (Модераторы: LifeIsGood , Hornet ) > . Point Grey USB 3. Как вам новость? ... Новости . ... Бердянское общество любителей астрономии "ОРИОН" . ... Одесское общество любителей астрономии ?АСТРОДЕС? Портал белорусских любителей астрономии - BelAstro.Net . ... Благодарностей: 0 . ... 21 Сентябрь 2009, 11:57:58 ? ... Point_Grey_USB3.jpg (16.07 КБ, 278x395 - просмотрено 155 раз.) ... Ответ #1 : 21 Сентябрь 2009, 12:00:52 ? ...

Next: HST Paper Products: A New Way to Look at HST Data . ... After providing on-the-fly re-calibration of HST data to archive users, ST-ECF has embarked on a new project aiming at grouping, cosmic ray cleaning and drizzling images taken by most HST instruments. ... The production of the missing jitter files combined with the extraction of additional engineering parameters will greatly enhance the homogeneity and the scientific value of the entire archive. ... 1995, HST Data Handbook, STScI, 107 . ...

Astronomy Picture of the Day . Bright Points on the Quiet Sun . ... Explanation: Up close, the solar surface is a striking patch work of granules in this very high resolution picture of the quiet Sun . Caused by convection, the granules are hot, rising columns of plasma edged by dark lanes of cooler, descending plasma. ... Constantly present on the solar surface, the bright points do not seem to be related to sunspots that come and go with the magnetic solar cycle . ... Hole in the Sun . ...