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1. Initial Distributions of Binary Parameters
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. ...
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Ссылки http://xray.sai.msu.ru/~mystery/articles/review/node39.html -- 14.1 Кб -- 26.02.1997
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2. http://www.gao.spb.ru/english/as/j2014/presentations/raposo-pulido.pdf
... Estimation of source coordinate time series from analysis of VLBI sessions. ... Conventions Cut-off elevation angle: 5є Terrestrial datum: NNR/NNT constraints to VTRF2008 stations without breaks (in total) For the sources : T L(2011) NNR Yes No s [ mas ] 2000 2000 Dip. ampl. [ mas /yr] 6.4 ±1.5 6.5 ±1.5 a (є) 263 ±11 263 ±11 d (є) -20 ±12 -23 ±12 Constraining each source to the ICRF2 position using very loose constraints (s=2as) is equivalent to apply loose NNR ...
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Ссылки http://www.gao.spb.ru/english/as/j2014/presentations/raposo-pulido.pdf -- 481.0 Кб -- 28.09.2014
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3. CIMA Frequently Asked Questions
Why are there different versions of CIMA? Which version of CIMA should I choose? ... There is no CIMA log in my project directory --- what happened? ... If You are a normal, happy observer, You should choose the CIMA version with the highest version number, since that version contains the latest improvements and bug fixes. ... This means that programs like the data quick-look display and various ALFA instrument displays all exist in several versions just like the CIMA observing session itself. ...
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Ссылки http://www.naic.edu/~cima/cima_faq.html -- 8.2 Кб -- 01.03.2012
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4. The AstroStat Slog BEHR
... Posts tagged ?BEHR? ... A great advantage of Bayesian analysis, they say, is the ability to propagate the posterior. That is, if we derive a posterior probability distribution function for a parameter using one dataset, we can apply that as the prior when a new dataset comes along, and thereby improve our estimates of the parameter and shrink the error bars. ... Suppose you have two data sets, D1 and D2, hypotheses H, and background info (model, etc.) ... Comment . ... 7 Comments . ...
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Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/tag/behr/index.html -- 25.1 Кб -- 01.03.2014
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5. ENGAMPLE
... 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. ...
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Ссылки http://www.ipa.nw.ru/PAGE/FUNDAMENTAL/LSBSS/engample.htm -- 8.7 Кб -- 09.04.2016
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6. Calculating the Position and Velocity Components of HST
... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/aket.html -- 12.3 Кб -- 03.11.2000
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7. XMM-Newton SAS: Watchout Page
... Within SAS, a tool is available to check the pile-up fraction in the pn data: epatplot . This tool compares the observed pattern distributions (derived from a pn calibrated and concatenated even list) with the calibrated models. ... The lower panel is the key element for the evaluation of the pile-up fraction: it shows the observed distribution of pattern as a function of energy (PI channel in Analog-Digital Units ), using the same color code. ... Pages maintained by SAS librarian . ...
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Ссылки http://xmm.vilspa.esa.es/sas/7.0.0/watchout/Evergreen_tips_and_tricks/eppatplot.shtml -- 7.1 Кб -- 22.12.2007
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8. WFPC2 Instrument Handbook Update
... To be read in conjunction with Section 4.11 of the WFPC2 Instrument Handbook , -Version 4.0. ... 1 The second study found evidence that CTE loss for faint stars has increased with time (Whitmore, 1998). The primary observational consequence of CTE loss is that a point source at the top of the chip appears to be fainter than if observed at the bottom of the chip, due to the loss of electrons as the star is read out down the chip (see Figure 1 ). ... Last updated: 06/16/98 10:38:00 . ...
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Ссылки http://www.stsci.edu/instrument-news/handbooks/wfpc2/98update/update0698.fm1.html -- 6.8 Кб -- 23.06.1998
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9. ATCA_report
... After a brief leave in Bangalore to work on astronomy (and holiday in Nepal), Dave will be continuing in management positions within the ATNF. ... We have also hosted an observing project visit from a contingent of ATNF and CTIP vacation scholars, who observed h Carina with the new 12-mm system (see article elsewhere in this issue), observed new HIPASS galaxies, and studied interference from microwave ovens. ... Currently we are testing this system with a single antenna. ...
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Ссылки http://www.atnf.csiro.au/news/newsletter/feb02/ATCA_report.htm -- 7.6 Кб -- 23.01.2013
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10. Some statistical trends and distributions
... Our resulting sample of ELGs presented in Tables 2 and 3 is not artificially biased to any specific type of galaxies. ... Since we are looking for selection of a sample of Case BCGs, it is interesting to examine how the detected BCGs are connected with Case emission-line codes. ... Altogether BCGs comprise about 60 % of all Case ELGs which display emission lines in our spectra, or about 44 % of all Case galaxies with some emission-line code. ... Among those with the code ``w'' about 40 % are BCGs. ...
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Ссылки http://www.sao.ru/precise/Laboratory/Publications/1997/CasePR/node10.html -- 7.4 Кб -- 10.01.1998
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11. Linear polarization: wavelength dependence
... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...
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Ссылки http://www.astro.spbu.ru/DOP/8-GLIB/ASTNOTES/node7.html -- 18.9 Кб -- 19.11.2010
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12. FORS1 Photometric System Characterization
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) . ...
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Ссылки http://www.eso.org/~fpatat/fors/testphot2/ -- 10.8 Кб -- 12.03.2007
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13. ASP: Using Multicultural Dimensions to Teach Astronomy
... the time of observation . ... Observing the Changing Position of the Sun To Establish Cardinal Directions . ... Observations of the Sun's apparent movement across the sky and its pattern of rising and setting in the east and west horizon helped to establish the cardinal directions. ... The final stage of the Sun's return was marked by the observation that the Sun had reached its highest altitude when the full width of your mitted hand could fill the gap between the Sun and the horizon. ...
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Ссылки http://www.astrosociety.org/edu/publications/tnl/53/multicultural2.html -- 15.2 Кб -- 02.10.2012
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14. Emission molecular bands
Next: Radial velocity of the Up: Optical spectrum of IRAS04296 Previous: Observations and spectra reduction . ... However, molecular emission features are only very rarely observed in the optical spectra of PPNe. ... On the other hand, it is well known that cometary nuclei spectra show prominent Swan band emission. In both spectra of IRAS04296 we have discovered strong emission in the (0;0) and (0;1) bands of the Swan system of the molecule. ... Now consider the case of IRAS04296. ...
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Ссылки http://mavr.sao.ru/hq/ssl/IRAS04296/node4.html -- 14.3 Кб -- 02.10.2012
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[ Сохраненная копия ] Ссылки http://jet.sao.ru/hq/ssl/IRAS04296/node4.html -- 14.3 Кб -- 01.10.2012
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[ Сохраненная копия ] Ссылки http://jet.sao.ru/hq/ssl/IRAS04296/node4.html -- 14.3 Кб -- 01.10.2012
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15. Data Format Session at 2001 IAU WG Meeting
The preliminary version of documentation of the format for the interchange of calibrated optical/IR data being developed by Tom Pauls of NRL and John Young of COAST was presented and a number of issues discussed. The proposed format is in the general form of a relational database with different components stored in FITS binary tables. ... Should there be a single data table type that includes all data types, or multiple table types, one per data type? What data types are needed? ...
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Ссылки http://www.mrao.cam.ac.uk/projects/OAS/oi_data/cotton_report.html -- 5.8 Кб -- 11.01.2008
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16. Description of the RadioAstron project, english version
Ground Support of RadioAstron . Control and Tracking Stations . RadioAstron satellite control (command transmission, telemetry, orbit measurements) will be conducted from Evpatoria and Bear Lake control stations. ... Coarse orbit measurements will be carried out from control stations. Each measurement takes ten minutes. ... Orbit measurements at tracking stations give only radial component of spacecraft velocity but the measurements are going continuously during observing sessions. ...
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Ссылки http://www.asc.rssi.ru/RadioAstron/description/support_eng.htm -- 14.3 Кб -- 10.05.2008
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17. Observations with the Faulkes Telescopes
... Images obtained using the Faulkes Telescope South, operated by Las Cumbres Observatory. ... The Faulkes Telescope Project and Las Cumbres Observatory Global Telescope Network had kindly given us the opportunity to use these telescopes and the observatory had booked us four sessions of controlling the telescope in order for us to make some observations on NEOs. ... Just before our first observing session on Friday, we were given a tour of the observatory building and its telescopes, by John McFarland...
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Ссылки http://star.arm.ac.uk/~dja/faulkes/2012feb.html -- 8.5 Кб -- 29.02.2012
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18. IBIS - Flat Fielding
IBIS Data Analysis . ... IBIS . ... Flat Fielding - Introduction . The images obtained by IBIS will have intensity variations across the field of view that are not due to the solar image, but rather caused by instrumental effects that alter the observed intensity in each point of the field of view. ... IBIS Flat Fielding Techniques . ... Therefore, it is desirable to obtain the flat field measurements center on a point along the equator near the heliographic center of the solar disk. ...
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Ссылки http://www.arcetri.astro.it/science/solare/IBIS/flat.fields.html -- 13.5 Кб -- 01.09.2003
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19. Accuracy of World positional CCD observations of the numbered minor planets
... During all period of our investigations Dr. N.Sumzina from the Institute of Applied Astronomy of RAS had prepared the Numbered Minor Planet positions from MPC Database for our processing with kind permission of the Director of Minor Planet Center Prof. Braian Marsden. ... Our extensive processing of the MPC data allows us to conclude that CCD observations of the Numbered and Unnumbered Minor Planets have the errors, sometimes very crude. ...
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Ссылки http://www.accuracy.puldb.ru/AUTHORS.HTM -- 3.3 Кб -- 05.12.2007
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20. http://www.mso.anu.edu.au/seminars/abstracts/20150911-1100.html
Diffuse interstellar bands (DIBs) and atomic lines are observed as interstellar absorptions in GALAH and other massive spectroscopic stellar surveys. By observing a given DIB toward many stars which are nearly in the same direction, but at different distances, one can reconstruct absorption sites along the line of sight. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20150911-1100.html -- 4.4 Кб -- 10.04.2016
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