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1. The AstroStat Slog background
... Posts tagged ?background? ... Probability density functions are another way of summarizing the consequences of assuming a Gaussian error distribution when the true distribution is Poisson. We can compute the posterior probability of the intensity of a source , when some number of counts are observed in a source region, and the background is estimated using counts observed in a different region. ... In both cases a background of 200 counts collected in an area 40x the source area is used. ...
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/tag/background/index.html -- 27.6 Кб -- 01.03.2014
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2. The H I Column Density Distribution Function at z=0: the Connection to Damped
... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... The Hб  I Column Density Distribution Function at z =0: the Connection to Damped Ly Statistics . ... We present a measurement of the Hб  I column density distribution function [ ] at the present epoch for column densities . These high column densities compare to those measured in damped Ly lines seen in absorption against background quasars. ... The Column Density Distribution Function . ...
[ Сохраненная копия ]  Ссылки http://www.atnf.csiro.au/pasa/16_1/zwaan/paper/index.html -- 53.4 Кб -- 08.04.2016
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3. Observing Program Email Folders
... For many years, all email related to a given HST observing program has been stored in that program's "history" file on SOGS. ... Nevertheless, we continued to store HST observing program emails in text files. ... Beginning on December 19, 2011, Exchange Public Folders will be used to store all future HST observing program related email. ... One folder per HST observing program . ... Exchange public folders are visible only to Outlook and Outlook Web Application (OWA) and not to other mail clients. ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/ops/program-email-folders -- 6.9 Кб -- 11.09.2012
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4. 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. ...
[ Сохраненная копия ]  Ссылки http://xray.sai.msu.ru/~mystery/articles/review/node39.html -- 14.1 Кб -- 26.02.1997
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5. Description
Next: Generation from Ground Calibration Up: EMOS_REDIST Previous: EMOS_REDIST Contents . The redistribution parameters for the MOS cameras. ... Attributes: . None. Columns: . ... The central CCD of each MOS detector has developed a patch where the energy resolution is worse than the average. ... The energy bounds of PHA channels. ... The energy bounds of the PI channels, used to determine the equivalent energies of spectral channels in the redistribution matrix construction. ...
[ Сохраненная копия ]  Ссылки http://xmm.vilspa.esa.es/calibration/documentation/CALHB/node752.html -- 6.7 Кб -- 20.09.2011
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6. Power of test statistics
... The question which method of the detection of features in the test statistic is the most sensitive, is of considerable importance for all practical TSA applications. ... A power of the test statistic is the probability that is accepted for the given Y : . ... Then, all statistics based on models with 3 parameters have similar values of the test power: power spectrum, Scargle statistics, fit of a sinusoid, AOV(3) statistic and PDM(3) statistic with corrected probability distribution. ...
[ Сохраненная копия ]  Ссылки http://www.sao.ru/precise/Midas_doc/doc/95NOV/vol2/node228.html -- 6.5 Кб -- 23.02.1996
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7. ESO - telbib information
... Science Users Information > Libraries > telbib information . ... Observing with ESO Telescopes . ... ESO Annual Reports . ... Statistics derived from the ESO Telescope Bibliography include only papers based on data from telescopes and instruments for which observing time was recommended by the ESO OPC (Observing Programmes Committee). telbib is compiled by scanning the major astronomical journals for scientific papers that contain any of the ESO-defined keywords (e.g., telescope and instrument names...
[ Сохраненная копия ]  Ссылки http://www.eso.org/sci/libraries/telbib_info.html -- 30.1 Кб -- 09.04.2016
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8. http://zebu.uoregon.edu/2004/es399/chitable.html
If the calculated chi-squared statistic exceeds a tabled value for the appropriate number of degrees of freedom, then observed values are significantly different from expected values at the confidence level indicated by p. For one degree of freedom: . p=0.05, 3.84; p=0.025, 5.02; p=0.01, 6.64; p=0.005, 7.88 . For two degrees of freedom: . ... For three degrees of freedom: . ... For four degrees of freedom: . ... For five degrees of freedom: . ...
[ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/2004/es399/chitable.html -- 1.8 Кб -- 28.01.2002
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9. http://www.mrao.cam.ac.uk/projects/skads/lofar/talks/magnetic.pdf
Magnetic Fields around Radio Galaxies Robert Laing (ESO) Laing et al. ... 2008) Negligible depolarization and 2 rotation Almost all Faraday effects must be due to foreground material How to fit depolarization caused by foreground Faraday rotation Complex polarization Rotation measure Integrate over a beam Observed RM for 0 2 rotation and depolarization Faraday rotation and depolarization 5.5 arcsec FWHM Faraday effects at high resolution FWHM = 1.5 ...
[ Текст ]  Ссылки http://www.mrao.cam.ac.uk/projects/skads/lofar/talks/magnetic.pdf -- 810.2 Кб -- 07.04.2009
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10. Heuristic Estimates of Weighted Binomial Statistics for Use in Detecting Rare
... The standard science quicklook processing produces over a dozen sky maps at each downlink, and these maps are automatically searched for potential transient point sources. ... We have found that a heuristic modification of a formula derived by Li & Ma (1983) provides reasonably accurate estimates of p -values for point source detections even for very low p -value detections. ... Case 1u. The most straightforward approach uses the signal , where . ... To get a p -value, use . ...
[ Сохраненная копия ]  Ссылки http://www.adass.org/adass/proceedings/adass96/theilerj.html -- 14.9 Кб -- 23.06.1998
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11. http://www.arcetri.astro.it/irlab/doc/library/nr/f14-0.pdf
... Chapter 14. ... Data consist of numbers, of course. ... In the following sections, you will repeatedly encounter the following paradigm: § apply some formula to the data to compute a statistic § compute where the value of that statistic falls in a probability distribution that is computed on the basis of some null hypothesis § if it falls in a very unlikely spot, way out on a tail of the distribution , conclude that the null hypothesis is false for your ... 603 604 Chapter 14. ...
[ Текст ]  Ссылки http://www.arcetri.astro.it/irlab/doc/library/nr/f14-0.pdf -- 45.5 Кб -- 07.10.1999
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12. The CIMA Observing Modes
This is a list of all currently available observing modes in CIMA. Different modes are available depending on whether CIMA is run in pulsar or in spectral line mode. ... Note that the appearance of the windows refer to CIMA version 3.1 , which for most observing modes is slightly different than from CIMA version 2.3 and 3.0 and completely different from CIMA version 2.2. ... Non-ALFA . ... Pulsar cross calibration . ... Drift map . ... ALFA : indicates whether the observing mode works with ALFA . ...
[ Сохраненная копия ]  Ссылки http://www.naic.edu/~cima/cima_show_obsmodes.html -- 11.2 Кб -- 01.03.2012
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13. http://site2010.sai.msu.ru/static/doc/BSafonov_site2010.pdf
Twilight observations with MASS/DIMM B. Safonov Sternberg Astronomical Institute Moscow State University Comprehensive Characterization of Astronomical Sites, 2010 B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 1 / 17 Why observe in twilight with MASS/DIMM? ... ASM includes 3 devices sensitive to background: guider, DIMM and MASS. B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 2 / 17 Background in guider. ...
[ Текст ]  Ссылки http://site2010.sai.msu.ru/static/doc/BSafonov_site2010.pdf -- 705.7 Кб -- 18.10.2010
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14. http://www.gao.spb.ru/english/publ-s/viii-rfs/p099.pdf
... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...
[ Текст ]  Ссылки http://www.gao.spb.ru/english/publ-s/viii-rfs/p099.pdf -- 100.3 Кб -- 21.05.2007
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15. Distribution of the analyzed SEPs with different >100 MeV proton fluxes (J100)
Distribution of the analyzed SEPs with different >100 MeV proton fluxes ( J 100 ) at the microwave flux density plane ' S 9 vs. ... 1) General correspondence takes place between intensities of microwave bursts and proton fluxes - J 100 increases when S 9 and S 15 rise. ... 3) Powerful microwave bursts ( S 9 , S 15 >3000-10000 sfu ) with hard radio spectra ( S 9 < S 15 ) correspond to majority of powerful proton fluxes ( J 100 >10 pfu ). ...
[ Сохраненная копия ]  Ссылки http://www.izmiran.rssi.ru/~ichertok/SEPs_radio/fig4s.htm -- 7.5 Кб -- 22.03.2012
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16. Mutual Events of the Uranian Satellites
In 2007-2008, the planet Uranus will reach one of its annual equinoxes for the first time since 1966. As a consequence, its five major satellites orbiting in the equatorial plane will undergo a season of mutual eclipses and occultations very similar to the one that Jupiter's Galilean satellites undergo every 6 years. ... Some of these events occur when Uranus is at conjunction, or the satellite is transiting or too close to the limb of the planet. ... Complete table of events . ...
[ Сохраненная копия ]  Ссылки http://star.arm.ac.uk/~aac/uranus/ -- 6.9 Кб -- 22.03.2007
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17. 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. ...
[ Сохраненная копия ]  Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20150911-1100.html -- 4.4 Кб -- 10.04.2016
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18. Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015
... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...
[ Сохраненная копия ]  Ссылки http://www.aaa.org/education/workshops-at-adorama/astronomy-workshop-observing-variable-stars-from-the-city-february-15-2015/ -- 102.0 Кб -- 10.04.2016
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19. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B4CBAD180-2693-408B-AD1D-DDE2856396E7%7D
This collage shows images of six different galaxy clusters taken with NASA's Hubble Space Telescope and Chandra X-ray Observatory. The clusters were observed in a study of how dark matter in clusters of galaxies behaves when the clusters collide. ... Using visible-light images from Hubble, the team was able to map the post-collision distribution of stars and also of the dark matter (colored in blue), which was traced through its gravitational lensing effects on background light. ...
[ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B4CBAD180-2693-408B-AD1D-DDE2856396E7%7D -- 4.2 Кб -- 10.04.2016
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20. ASP: Using Multicultural Dimensions to Teach Astronomy
Nalini Chandra & John Percy, University of Toronto . ... Some works to refer to when using multicultural astronomy in your classroom: . ... Nalini Chandra is a doctoral candidate at the University of Toronto in the Department of Curriculum Teaching and Learning at OISE/UT. ... OISE-University of Toronto . ... John Percy, Professor of Astronomy at the University of Toronto, is a Past President of the ASP, and is active in astronomy education at all levels. ... ASP Multicultural Astronomy Resources . ...
[ Сохраненная копия ]  Ссылки http://www.astrosociety.org/edu/publications/tnl/53/multicultural5.html -- 10.8 Кб -- 02.10.2012
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