Next: Functionality Up: RGS_QUANTUMEF Previous: RGS_QUANTUMEF Contents . This is one of the most important RGS calibration files, whose separate extensions describe different aspects of the physical model of the ensemble of gratings and CCD detectors that form an RGS instrument: . CCD_DESC . Thickness of CCD layers of passive material. ... Total thickness of CCDs including CCD_DESC dead layers. ... Michael Smith 2011-09-20 ...

Next: Star Formation Rate and Up: No Title Previous: Calculation of Evolutionary Tracks . To start calculations, we choose the distributions of the initial binary parameters: the mass of the primary ZAMS component, , binary mass ratio, , orbital separation a . ... whereas the mass ratio distribution is not. ... The zero assumption often made is that the mass ratio distribution has a flat shape, that is binaries with a high mass ratio occur as frequently as those with equal masses. ...

... The IRAF task rvcorrect is used to compute radial velocity corrections. rvcorrect is in the IRAF astutil package and it calls on task observatory , which is also found in astutil. The following steps are an example of its use for an HST dataset where the HST velocity around the Earth is ignored (maximum residual: +/- ~7.8 km/s): . ... Here is an example of file rvcor . ... Run the rvcorrect task: cl>rvcorrect f=rvcor.in > outputfile The above example produced the following output file. ...

... The material in "From Stargazers to Starships" meets several important requirements of the national standards. Pages cited below are from National Science Education Standards National Academy Press, Washington 1995. ... For example: the sections on astronomy not only describe calendars and sundials (including their construction), but also the astronomy of the ancient Greeks, including two different ways in which ancient Greeks estimated the distance to the Moon. ...

. Here is an applet. It has two parameters -- speed and message. Its alignment is ABSMIDDLE. Here is an applet. It has two parameters -- speed and message. Its alignment is ABSMIDDLE. Here is an another instance of the same applet, but it has a different speed and a different message. Its alignment is RIGHT. Here is an another instance of the same applet, but it has a different speed and a different message. Its alignment is RIGHT. The Java source for the applet.

... SFIT is a general-purpose code designed to optimize theoretical stellar spectra to an observed spectrum. ... While the programme expects input from "stdio", it is more natural to save commands in a file (eg "sfit_input") and run the code simply by . ... If the spectra to be fitted have a filename "star_spectrum", then the best fit spectrum will be written out, together with the renormalized input spectrum, to a file called "star_spectrum.fit". ... sets up model spectrum grid (and for 2nd star) . ...

... In this case, because polarimetry is not currently possible with the 3-mm system, only task mfcal is needed to perform bandpass and antenna calibration. ... This section outlines an alternative calibration approach exploiting the dual frequency bands of the ATCA. ... Unlike the approach of Chapter 11 , the approach described here does not split the data into separate single source, single frequency files before calibration. ... Input multi-source, dual-band dataset. select=source(1921-293) . ...

Next: Extinction efficiencies: general behaviour Up: Optical properties of cosmic Previous: Optical properties of cosmic . It is now evident that observed interstellar extinction cannot be explain using particles of only one kind. ... The intensity of radiation after passing a dust cloud is equal to . ... The interstellar extinction is . ... Next: Extinction efficiencies: general behaviour Up: Optical properties of cosmic Previous: Optical properties of cosmic root 2003-04-09 ...

... Many of our new results favour a conal geometry for the arrangement of emission regions and allow accurate estimates of the emission heights and polar cap locations for the emission cones to be obtained. These results indicate that pulsar emission cones may be located at around half-way out the edge of the polar cap and at altitudes of a few hundred to a thousand kilometers above the neutron star surface. ...

... every new catalog of objects has to be contained in the UNIX directory having the same name as the catalog of objects; . ... the programs for local operations (programs of low level) with the catalog of objects are also in the same directory; . brief characteristics and names of the programs and file with the description of the catalog are stored in the file cats_descr ; . ... All astronomical catalogs have a different format and list different observables. ...

. Christmas History Traditions Carols Celebration in UK Celebration in USA яhristmas Menu .

A very important stage in a story of formation of any new science is the shift from discussion of situation which are possible but do not occur in practice due to some reason to recognition of real phenomena of interest. ... We suggest to consider computer viruses as this new specific form of life which is coming in the contact with our form of life. ... Computer life has been created by human being, the role of independent evolution of computer viruses seems to be still negligible. ...

... Initially SAI Supernova Catalogue was presented in the form of filebased system. ... The current version of SAI Supernova Catalogue presents data on supernovae together with data on their parent galaxies. ... The main source of data for the galaxies was LEDA database. ... In some cases our data were compared with the ones from the Asiago Supernova Catalogue and from List of Supernovae at Harvard-Smithsonian Center for Astrophysics, but the compilation of our Catalogue is carried out independently. ...

. There are several different shells available for Unix; the most popular are described here. You can use any one of these shells if they are available on your system. And you can switch between the different shells once you have found out if they are available. Bourne shell (sh) . C shell (csh) . TC shell (tcsh) . Korn shell (ksh) . Bourne Again SHell (bash) .

... If Earth's sphericity is of prime importance as the ultimate cause of weather and climate, Earth's *ROTATION* is almost as important, although the atmosphere would still exhibit motions even if it wouldn't rotate. ... Take any one of those two conditions away,and these waves become mathematically impossible. ... The Coriolis force is the force directly caused by Earth's rotation, and should be mentioned when going into a more detailed description of the physics of Rossby waves. ...

Next: One example Up: No Title Previous: No Title . Wavelets are versatile tools of harmonic analysis. Because of their many uses, the word `wavelet' comes with different connotations (and different promises) to users in different fields. ... To pursue the analogy, one may wish to select from the data some contact surfaces with specific finish tolerances. the amount of information is then reduced by selection and/or by statistical means. ...

SPECIALIZED COMPUTER SYSTEMS FOR MATHEMATICAL MODELING OF DISCRETE POINT STRUCTURES READOUT PROCESS Aleksandr Reznik, Andrey Torgov, Aleksandr Soloviev Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences The paper describes the specialized software systems that have been used to solve difficult mathematical problems in digital images processing. ... Systems for the first computers based on FORTRAN. ... Systems based on Matlab special environment. ...

It is important to set this directive to one of the configuration used for this data set. The fit results will be associated with this configuration. Different configurations have different calibrations, and this is why this selection has been introduced for the NPOI 6-station array reduction. The configuration selection acts just like a scan/point selection.

Astronomical Data Analysis Software and Systems XIII ASP Conference Series, Vol. 314, 2004 F. Ochsenbein, M. Al len, and D. Egret, eds. MMDSL: a Multi-Mission Data Server at LAEFF E. Solano, R. Gutiґ rez, B. Montesinos1, C. Morales and J. Garcґ er ia LAEFF. ... Since January 2002 LAEFF has been developing, in the framework of the VO, a multi-mission data server to provide easy, efficient and uniform access to astronomical databases. ... All rights reserved. ...

Herschel Guaranteed-Time Key Projects . at Arcetri . ... Both regard spectroscopic observations of different classes of star-forming regions in the Galaxy. WISH: WATER IN STAR-FORMING REGIONS WITH HERSCHEL . ... HS3F: HERSCHEL SPECTRAL SURVEYS OF STAR FORMATION REGIONS . ... Since gas cools mostly by line emission, knowing what molecules are formed and which lines are emitted in the different regions at different times is mandatory to understand the gas thermal balance. ...