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1. Astronomy HyperText Book: Stellar Evolution
... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...
[ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/textbook/se.html -- 4.8 Кб -- 16.12.1997
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2. Standard orientation
... The frames, as they appear on the monitor with the command LOAD/IMAGE , are in general not oriented properly. ... This means that the frames have to be rotated in such a way that: . ... ROTATE/ECHELLE inputspec outframe mode . ... The command ROTATE/ECHELLE sets descriptor values START and STEP to 1.,1. for all images and updates the session keyword CCDBIN to the original steps of the images. These operations must be performed by the user if another command than ROTATE/ECHELLE is applied. ...
[ Сохраненная копия ]  Ссылки http://www.sao.ru/precise/Midas_doc/doc/95NOV/vol2/node467.html -- 4.1 Кб -- 23.02.1996
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3. Standard Setup Files
Next: Examples of Setup Files Up: Setup Files Previous: Setup Files Contents . Over 200 standard setup files have been created, covering many of the normal modes of observing. ... These especially include precisely defined, and somewhat complex cases like the Mark III standard modes (although MarkIII went the way of the dinosaur long ago. ... v '' files: . These are setup files for VLBI observations using VLBA recording formats. ... These are setup files for Mark III observations. ...
[ Сохраненная копия ]  Ссылки http://www.atnf.csiro.au/people/Tasso.Tzioumis/sched/Standard_Setup_Files.html -- 9.1 Кб -- 10.04.2016
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4. C Standard Library Functions
Next: Buffer Manipulation Up: Programming in C Previous: Compiler Options . Listed below are nearly all the ANSI C standard library functions. The header file where related definitions are stored are given. These may vary on some systems so check local reference manuals. ... More info can be obtained from online man calls or reference manuals. Buffer Manipulation . Character Classification and Conversion . ... File Manipulation . ... Wed Sep 14 10:06:31 BST 1994 ...
[ Сохраненная копия ]  Ссылки http://mavr.sao.ru/hq/sts/linux/book/c_marshall/chapter2_21.html -- 3.7 Кб -- 28.12.2007
[ Сохраненная копия ]  Ссылки http://www.sao.ru/hq/sts/linux/book/c_marshall/chapter2_21.html -- 3.7 Кб -- 02.10.2012
[ Сохраненная копия ]  Ссылки http://jet.sao.ru/hq/sts/linux/book/c_marshall/chapter2_21.html -- 3.7 Кб -- 02.10.2012
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5. Parameters
... emchain (emchain-11.14.1) [xmmsas_20060628_1801-7.0.0] . Meta Index / Home Page This section documents the parameters recognized by this task (if any). Parameter . ... string . none . ... boolean . ... yes/no . ... odf . ... SAS_ODF . ... run badpix . ... Because emchain is a standalone Perl script, it does not deal with the standard SAS parameters (see taskmain ) in exactly the same way as normal SAS tasks do: . ... It passes all other standard SAS parameters to its constituent tasks. ...
[ Сохраненная копия ]  Ссылки http://xmm.vilspa.esa.es/sas/7.0.0/doc/emchain/node11.html -- 17.5 Кб -- 28.06.2006
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6. Bias-Free Parameter Estimation with Few Counts, by Iterative Chi-Squared
... We demonstrate through numerical simulations that model parameters estimated with our technique are essentially bias-free, even when the average number of counts per bin is 1. ... The IW technique avoids such biases by estimating through successive iterations, where for each iteration, j, , and the best-fit parameters are determined by minimization of . ... In our sample, we find that the minimum values and best-fit parameters converge after about 6 iterations. ...
[ Сохраненная копия ]  Ссылки http://www.adass.org/adass/proceedings/adass94/kearnsk.html -- 12.3 Кб -- 03.11.2000
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7. The AstroStat Slog parameter estimation
... Posts tagged ?parameter estimation? ... Leccardi & Molendi (2007) have a paper in A&A ( astro-ph/0705.4199 ) discussing the biases in parameter estimation when spectral fitting is confronted with low counts data. Not surprisingly, they find that the bias is higher for lower counts, for standard chisq compared to C-stat, for grouped data compared to ungrouped. ... Tags: bias , C-stat , chi-square , chisq , Cstat , Fitting , parameter estimation , Peter Freeman , spectra . ... 1 Comment . ...
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/tag/parameter-estimation/index.html -- 20.6 Кб -- 01.03.2014
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8. Influence of onboard events onto spin parameters
External influences on spin parameters for INTERBALL - AP . ... The main interest is that almost all kind of external influences to parameters of motion (eclipse, normalization, ROS) are presented in the one time interval. Three upper panels illustrate the spin velocity, the angle between kinetic moment and sun direction, and the nutation.All external events are represented on the lowest panel as blue, green and yellow columns. ...
[ Сохраненная копия ]  Ссылки http://www.iki.rssi.ru/ibelova/show/influenc.htm -- 2.5 Кб -- 04.10.2000
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9. The Hierarchical Stellar Systems Model Format
Next: Stellar models Up: Introduction Previous: Photometry Contents . In a hierarchical stellar system, the separation between two neighboring stars is always much smaller than the separation of this pair from the next companion in the system, be it another pair or a single star. ... They are also numerically easier to handle than non-hierarchical systems, since each pair can be described with the standard orbital parameters, and each star with a small number of physical parameters. ... System . ...
[ Сохраненная копия ]  Ссылки http://www.eso.org/~chummel/oyster/manual/node51.html -- 10.2 Кб -- 28.04.2015
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