... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

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" . ...

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 . ...

... Pointers to Pointers . ... Pointers to a Function . ... We have introduced some advanced pointer issues already. This chapter brings together some topics we have briefly mentioned and others to complete our study C pointers. ... main(int argc, char **argv) . ... These are the only arguments main accepts. argc is the number of arguments typed -- including the program name. argv is an array of strings holding each command line argument -- including the program name in the first array element. ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

. Russian Version [ MS-Win ] . [ News ] . [ Satellite data ] . [ SMIS ] . [ ] . Image of Moscow region. NOAA 14 8/06/1995. Arrow points to area with forest fires. Image of Moscow region . 7/6/1995 NOAA 14. Forest fires detected at 55-30'N 39-30'E . Back to SMIS Home Page .

The HyperNews Linux KHG Discussion Pages . Forum: The Linux Kernel Hackers' Guide . Date: Tue, 04 Aug 1998 16:51:29 GMT . From: < pkunisetty@hotmail.com > . I want to print floating point numbers from kernel module. printk is working fine for integers but not working for floating point numbers. Is there any otherway to print the floating point numbers? Thanks.

Общая Астрономическая Конференция > Форумы общей направленности > Любые вопросы от новичков . Искатель Star pointer . ... Поиск . Сообщения за день . ... Серега2000 . ... Отправить личное сообщение для Серега2000 . Найти еще сообщения от Серега2000 . ... Сообщение от Серега2000 . ... Созвездия (поиск и описание) .. Созвездия южного неба (поиск и описание) .. Осенние созвездия (поиск и описание) .. Летние созвездия (поиск и описание) .. ... Зимние созвездия (поиск и описание) .. ...

Name Last modified Size Description . Parent Directory - pointing.c 2006-03-26 01:38 2.2K . Apache/2.4.6 (Linux/SUSE) Server at www.astro.louisville.edu Port 80

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . des actualit†йs . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil La galaxie NGC 4696, point d'interrogation cosmique . ... Un mince filin enroul†й sur lui-m†кme termin†й par un point lumineux: la forme †йtrange de la galaxie elliptique NGC 4696 fascine les scientifiques. ...

... Марсоход Curiosity . ... Отдельная страница/ссылка на новость: Гряда 'Point Lake' на Марсе, кратер Гейла . ... Гряда 'Point Lake' заинтересовала ученых еще в октябре 2012 г., когда было обнаружено на снимках марсохода с востока. Гряда 'Point Lake' на Марсе, кратер Гейла . ... Марсианская научная лаборатория (Mars Science Laboratory, MSL) , - миссия НАСА, в ходе выполнения которой на Марс был успешно доставлен и эксплуатируется марсоход третьего поколения 'Кьюриосити' (Curiosity, Любопытство). ...

... Индекс и локальная алгебра критической точки. Простые критические точки гладких функций. ... Теорема Тужрона о конечной определенности ростка гладкой функции в конечнократной критической точке. Квазиоднородные и полуквазиоднородные функции. Нормальные формы полуквазиоднородных функций. Деформации ростков функций. ... Бифуркационные диаграммы нулей и функций. Лежандровы и лагранжевы отображения и их особенности. ... Фронты, каустики и страты Максвелла и их особенности. ...

... Telescopes . ... The LX850 combines innovative concepts like StarlockтДв fulltime automatic guiding and high-precision pointing, f/8 ACF OTAs with internal Crayford-style two-speed focuser and a portable precision German equatorial mount. ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... Meade Green Laser Pointer- a great item for star parties and backyard astronomy. ...

home publications > mercury . ... Books . ... Pointing Your Cursor to the Universe . ... And while numerous books for enthusiastic non-scientists are written each year about cosmology, this grand branch of astronomy remains one of mystery and a source of almost passive intimidation for non-scientists. ... Indeed, much of what we know about the Universe is due primarily to observation and then a back-application or even development of theory to explain or understand those observations. ...

. F IGURE . 3. Plots of V S against cos for the thick disk and the old halo samples. In this graph a constant V rot appears as a straight line. Higher-weight points are plotted with larger symbols. discussion in the text | previous figure | next figure .

Two- point correlation function and power spectrum at very large scales from Stromlo-APM redshift survey Zugan G. Deng et al. ... This sample promises one to analyze features of the large scale structures in the distribution of galaxies, and the segregation of di erent morphological types of galaxies at very large scales ( 100h 1 Mpc). ... Comparison two-point correlation functions of early and late type galaxies shows that segregation exists at very large scales too. ...

Stellarium 0.12.3 . ... StelCircleArcRenderer Class Reference . Provides functions to draw circle arcs using StelRenderer . ... drawGreatCircleArc (const Vec3d &start, const Vec3d &stop, const SphericalCap *clippingCap=NULL, void(*viewportEdgeIntersectCallback)(const Vec3d &screenPos, const Vec3d &direction, void *userData)=NULL, void *userData=NULL) . ... Create a circle arc renderer to draw multiple circle arcs . ... void(*)(const Vec3d &screenPos, const Vec3d &direction, void *userData)љ . ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... lagrangian points . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The algorithm and appropriate program for decametric radiosignal propagation conditions prediction for paths from 500 to 9000 km have been developed at ISTP SB on the basis of normal wave method (AltyntsevaB.I,Iliyin N.V., Kurkin V.I. and others //Decameters channel simulation on the base of normal wave method . ... Solar activity indices are chosen automatically from the prediction date from the database . ...