... Previous: Implementation Design of the ASC Data Model . ... We describe a coordinate library for AXAF data analysis. The library handles transformations between celestial coordinates and instrumental (mirror, focal plane, detector pixel) coordinate systems. ... Pixlib library is intended to perform AXAF Science Center (ASC) coordinate system data analysis. ... At the present, the library affords more than 50 transformations among ~20 ASC coordinate systems. ... is zero matrix and I unit matrix. ...

... AMPLE (Adaptable Minor Planet Ephemerides) is integrated software package to deal with a number of problems concerning minor planets with the aid of IBM-type personal computer. ... compiling a list of all numbered minor planets which can be seen at certain moment within specified sky region and visualization of their mutual positions; . ... As AMPLE is able to reproduce virtually any table of "the Ephemerides of Minor Planets" , it may be considered as computer version of the EMP. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

and 42 % 27-11-1999 Andr\'as Holl % 2.31: 02-05-2001 % % Konkoly Observatory, Budapest, Hungary % Use the following documentstyle definition : % \documentstyle[twoside, ibvs2, epsf]{article} % or % \documentstyle[twoside]{article} % \input ibvs2.sty % \input epsf.sty % epsf is only needed for figures % IBVS.STY screen message \ typeout {} \ typeout {IBVS.STY Ver. 2.31 - 02-05-2001 } \ typeout {Information Bulletin on Variable Stars - Konkoly Observatory} \ ...

... Luminosity (L) · · · · A source's luminosity is the power that it emits in radiation. ... NB Astronomers often say `flux' when they mean `flux density' · SI units are Wm-2Hz -1 -26 filter · Also used are Jy 10 Wm-2Hz -1 E= РРРF d dA dt Specific Intensity, Surface Brightness (I) · Specific intensity (or surface brightness) is the power received (or emitted) per unit area per unit frequency per unit solid angle. ч F at surface of a spherical source = I · · Specific intensity is independent of distance...

... This program was created for correlating chosen regions in the series of fts images. ... Chosen regions' . ... In this section the program counts the integral for each region of the grid for each image. ... As a matter of fact, the integral is total brightness of the region and it is counted by 'int_tabulated' IDL function. ... In addition, the program will show the count of the regions which correlate with the corresponding region (the brighter region means the bigger count) and its contour. ...

. Eng Rus . Main . Team . Observational . programs . Results . Publications . Presentations at . conferences . Holding conferences: . GRB mini-workshop 2006 . GRB workshop 2009 . 30"x30" B, V, Rc and Ic images of the GRB 000926 host galaxy field. The position of the optical transient (Fynbo et al., 2001, A , 373, 796) is marked off by the white circles ( radius is 0".5 according to astrometrical error) . Design ts@sao.ru . Last update: 15.02.2014 .

... The first column gives the star identification number, followed by X, Y positions in mm. The zero point of these offsets is star number 1 which lies at 21:24:20.52 +36:30:25.6 (equator and equinox 2000). Next are relative proper motions (muX and muY) and their errors (ex and ey) in 10**4 arcsec/yr, followed by calculated V magnitudes. The final column gives the calculated membership probabilities in percent. ...

... Tonight's Sky . ... Mars . ... Home . ... Observing . ... Mars orbiter repositioned to phone home Mars landing . ... Two other Mars orbiters, NASAт??s Mars Reconnaissance Orbiter and the European Space Agencyт??s Mars Express, also will be in position to receive radio transmissions from MSL during its descent. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

These observations are aimed at fully charactering FORS1 photometric system (UBVRI zero-points, color-terms and extinction coefficients) for the Tektronix 2048x2048 pixel CCD (24µm px) . To this aim, the two Landolt/Stetson photometric fields SA95 and SA101 will be observed on a number of epochs and at different airmasses during February and March 2007. ... SA101 . ... OBs for SA101 have to be observed during evenigh twilight (exceptions are expected for the second half of March) . ...

Institute of Applied Astronomy Russian Academy of Sciences Method of Determining the Orbits of the Small Bodies in the Solar System Based on an Exhaustive Search of Orbital Planes Dmitrii Vavilov, Yurii Medvedev Introduction to the problem: Let we have n 3 positional observations of a body: points in time ( = 1, ) , right ascensions , and declinations . ... Determination of the orbit using the Gauss method of determining orbital elements based on two heliocentric positions and points in time. ...

... The goal of this course is to introduce some -- very interesting -- basic examples and notions of combinatorial game theory, following the book "How to win your mathematical games", by Berlekamp, Conway and Guy. ... So, for every game there is a winning strategy, and to find one one can use the well-known idea of winning/losing positions. ... Temperature theory. We will see the limits of the association of numbers and games: some positions can not be associated to a single real number! ...

Computer Ephemeris for 2014 from DE200/LE200. ... Sidereal Time. ... Apparent equatorial positions. Ecliptical positions. ... Chebyshev polinomial approximation of positions. ... Position and velocity. ... Dynamical time. Sidereal time. ... Osculating elements of planetary orbits. Planetary configurations (by time). ... Fundamental ephemeris. ... Ephemeris for physical observations. ... Stars. ... All comments on Computer Ephemeris please direct to the author: charlie@mail.univ.kiev.ua ...

... Next, the screen displays "Press 0 to align or Mode for Menu." Press "0" if you wish to begin Automatic alignment (or Easy Align, depending on your telescope model), or press Mode if you wish to choose a manual alignment method ("Automatic Alignment" displays, and you can press MODE to go through the menu to find other alignments). ... Note: If you press the "?" key while "Ctr Brightest Star" displays, the alignment star that AutoStar has chosen will display. ... Alignment successful" displays. ...

Each Apache configuration directive is described using a common format that looks like this: . ... This indicates the format of the directive as it would appear in a configuration file. This syntax is extremely directive-specific, and is described in detail in the directive's definition. ... If the directive has a default value ( i.e. , if you omit it from your configuration entirely, the Apache Web server will behave as though you set it to a particular value), it is described here. ...

... The TESIS is a set of solar imaging instruments developed by the Lebedev Physical Institute of the Russian Academy of Science, and launched aboard the Russian spacecraft CORONAS-PHOTON on January 30, 2009. The main goal of the TESIS is to provide complex observations of solar active phenomena from the transition region to the inner and outer solar corona with high spatial, spectral and temporal resolution in the EUV and Soft X-ray spectral bands. ... Solar activity hits a new low . ...

NOTE: The storm sudden commencement data file was updated on 18 Feb 1998. o Revised data for 1968-1975 were taken from IAGA Bulletin No. ... Indices aa and storm sudden commencements"; see also IAGA Bulletin 39: " Supplementary Geomagnetic Data 1957-1975", including a new list of ssc's 1968-1975). ... From the monthly reports of Rapid Variations prepared by 43 magnetic observatories (see list page 121), a combined list of all events is compiled. ...

Peremennye Zvezdy", . ... Star Name: . GSC 04372-00577, USNO-B1.0 1644-0054634, 2MASS 07272448+7425595 . ... Variability type: . ... The 2MASS infrared colors J = 12.295 (+/-0.020), H = 12.007 (+/-0.023), and Ks = 11.935 (+/-0.022) suggest an early G spectral type (Bessell Brett, 1988). We can use single-epoch 2MASS data to guess the spectral type since J, H, and K magnitudes were measured simultaneously and eclipses in W UMa type systems are often colorless. ... Data Source . ...

... The variability of the spectrum of the optical component of the IR-source IRAS01005+7910 was discovered for the first time in the BTA spectra [1]. ... The spectral features include absorptions that form in near-photospheric layers, narrow envelope emissions, and emission-absorption profiles that form in photosphere-to-envelope transition layers (the wind). ... Discovery of spectral variation in the optical counterpart of IRAS01005+7910. ... Dashed line - envelope curve of all the SiII 5979 profiles ...

This page will contain definitions (and basic references) of the following parameters: . cross-sections C ext , C sca , C abs , C bk ; . efficiencies Q ext , Q sca , Q abs , Q bk ; . ... TE/TM mode definitions for arbitrary shapes. Note that some parameters are defined in a quite different (specific) manner than for spherical scatterers, and some definitions in the book of Mishchenko et al. ...