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181. The AstroStat Slog Blog Archive a century ago
... Archives . ... Such eminent astronomer said already least absolute deviation over chi-square , if I match simple mean residual and mean square residual to relevant methodologies, in order. ... Anyway, if one is sure that the data/parameters of interest are sampled from normal distribution, Eddington?s statement is better to be reverted because of sufficiency . ... Instead of sample standard deviation, use absolute mean deviation (simple mean residual, Eddington?s words) to quantify uncertainty. ...
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/2009/a-century-ago/index.html -- 26.5 Кб -- 01.03.2014
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182. Algorithms for CCD Stellar Photometry
... Basic algorithms for the production of stellar photometry from CCD observations are described and reviewed. ... The problem of doing accurate stellar photometry with calibrated charge-coupled device (CCD) data amounts to that of condensing the intensity values of hundreds, thousands, or even millions of picture elements (pixels) into a list containing the magnitude and position of each star on the CCD image. ... Center an aperture of N A pixels on the star. ... PIXEL.LT.PEAKMAX)) THEN BINGO = .TRUE....
[ Сохраненная копия ]  Ссылки http://www.adass.org/adass/proceedings/adass98/mighellkj/ -- 59.5 Кб -- 16.07.1999
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183. Figure of Merit
... Hanisch provided me with the ``right'' answers for the stars in the simulated cluster, so it's easy to determine the error of each magnitude determination: find the star in the truth file that falls nearest to the position of each star in my photometric output, and compute the difference between their magnitudes. The question of how to encapsulate these magnitude differences in an overall figure of merit for the reduction procedure deserves some thought. ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/stsci/meetings/irw/proceedings/stetsonp.dir/section3_3.html -- 9.7 Кб -- 18.04.1994
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184. SAI OCL Catalog Description
... Description . Catalog . ... In the Catalog, we publish equatorial (ЮБ 2000 , ЮД 2000 ) and galactic (l,b) coordinates of cluster centers derived as the position of overdensity in 2MASS catalog (Koposov et al. ... Distances, color-excesses and ages are the mean-square values calculated using all available evaluations from different color-magnitude diagrams. ... There are individual pages for every cluster where all available plots and parameters are published. ... 2002). ...
[ Сохраненная копия ]  Ссылки http://ocl.sai.msu.ru/description/ -- 5.9 Кб -- 09.04.2016
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185. azencRackGearRunout
The azimuth encoder rack gear is mounted on the inside of the azimuth ring girder. The azimuth encoder turns on this gear as the azimuth moves 0 to 720 degrees. ... The software assumes that this arc length along the encoder rack gear is correct (at a constant radius of 127/2 feet). The error in the radius of the rack gear becomes an azimuth error. To measure the error in the azimuth encoder rack gear, jon hagen built a proximity sensor. ... To compute the az encoder runout error: . ...
[ Сохраненная копия ]  Ссылки http://www.naic.edu/~phil/pnt/azEncRackGear.html -- 8.2 Кб -- 02.05.2007
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186. GaussianBlur (ImageJ API)
... METHOD . ... public class GaussianBlur . ... Like all convolution operations in ImageJ, it assumes that out-of-image pixels have a value equal to the nearest edge pixel. ... blur1Direction ( FloatProcessor ip, double sigma, double accuracy, boolean xDirection, int extraLines) . ... convolveLine (float[] input, float[] pixels, float[][] kernel, int readFrom, int readTo, int writeFrom, int writeTo, int point0, int pointInc) . ... makeGaussianKernel (double sigma, double accuracy, int maxRadius) . ...
[ Сохраненная копия ]  Ссылки http://www.astro.louisville.edu/software/astroimagej/imagej/api/ij/plugin/filter/GaussianBlur.html -- 34.3 Кб -- 02.12.2010
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187. http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/uploads/MROIDelayLine.TestResults/TestList.pdf
... 6 2.1.1 Trolley slew tests .. ... 1 Test Description Check velocity ramping under VME control by moving fixed distances (plus and minus): 4mm, 10mm, 20mm, 50mm 100mm 200mm 500mm 2m. Carry out a 17m slew with the maximum velocity set to +0.7m/s Carry out a 17m slew with the maximum velocity set to -0.7m/s Carry out a sequence of slews at maximum velocity equivalent to 380m of delay line travel Primary objective Test repositioning time Delay precision Check metrology lock ...
[ Текст ]  Ссылки http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/uploads/MROIDelayLine.TestResults/TestList.pdf -- 106.3 Кб -- 08.02.2008
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188. Астрономия
... Видимое годовое движение Солнца . ... Чему равна высота точки зенита над горизонтом? ... Эксцентриситет орбиты Цереры равен 0,079, большая ось 5,54 а. е. Чему равно наибольшее расстояние Цереры от Солнца? ... Горизонтальный параллакс Солнца равен 8,8?? ... Горизонтальный параллакс Солнца 8,8??, расстояние от Солнца до Марса 1,5 а. е. Определите линейный радиус Марса, если известно, что во время великого противостояния его угловой радиус составляет 12,5??, а горизонтальный параллакс равен 23,4?? ...
[ Сохраненная копия ]  Ссылки http://astronom-ntl.narod.ru/astrmain.htm -- 104.1 Кб -- 09.04.2016
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189. Results of the 3/93 Drilling Tests
... Plates and Drilling . ... Results . ... In January of 1992 we drilled and measured a set of test plates testing several techniques including drilling with a carbide twist drill and drilling followed by reaming [R. Owen, et al., unpublished]. ... The test plates were 3.5" diameter 1/8" thick disks of aluminum. 50 holes were drilled in each test plate, 10 each in five concentric circles. ... This diameter was the optimal value for our plug plates determined from the 1/92 drilling tests. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19930430_drill_3_93.html -- 21.2 Кб -- 19.05.1998
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190. Photometric Performance of NICMOS
Next: The Photometric Performance of Up: NICMOS Data Calibration and Previous: Status and Goals of . ... Absolute Spectrophotometric Standards . Absolute Photometry . ... Velocity shifts and Photometry with Narrow-band Filters . ... HST, NICMOS, near-infrared, standards, photometry, calibration . ... In practice NICMOS does not have a set of filters matching any of the standard ground-based photometric bands and this poses a challenge when trying to achieve precise absolute photometry. ...
[ Сохраненная копия ]  Ссылки http://www.stecf.org/conferences/sardinia/node11.html -- 33.3 Кб -- 12.06.2006
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191. Vulcan: ghost planet | Astronotes
Astronotes Armagh Planetarium's Stellar Blog! ... Sun . ... There could be an eighth planet to discover! ... The orbits of the planets could be predicted perfectly- apart from Mercuryт??s. Planetary orbits are not circles, but ellipses and Mercuryт??s orbit was the least circular (or most т??eccentricт??) known. ... Vulcan, according to Le Verrier, orbited the Sun every 19.7 days at an average distance of 21 million km (0.14 au), a little over a third of Mercury?s average distance from the Sun. ...
[ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/vulcan-the-solar-systems-ghost-planet.html -- 54.0 Кб -- 09.04.2016
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192. Phil Plait's Bad Astronomy: Bitesize Astronomy
... Bad Astronomy . ... Bitesize Astronomy . ... The only motions we see easily are the rising and setting of the Sun, Moon and stars, but that is a reflection of our own Earth's rotation. ... While doing some routine data analysis for for my work with STIS data , I ran across a star that had me baffled. ... I also labeled the stars the same way as in the STIS image. ... In that second image, you can see that the faint star is in about the right place, but the bright star is not even in STIS's field! ...
[ Сохраненная копия ]  Ссылки http://www.badastronomy.com/bitesize/proper.html -- 23.7 Кб -- 09.04.2016
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193. Meade Instruments Corporation - Frequently Asked Questions
... Meade Instruments Corporation . Telescopes · Binoculars · Microscopes . ... Frequently Asked Questions: LX200GPS . When I align the telescope, the alignment star is not in the viewfinder. ... After I select an object and press GOTO, the Autostar displays "Slewing.....", but does not seem to move. Is my Autostar broken? ... Can I use my Autostar II on his telescope to access my user objects? ... Choosing A Telescope . ... Copyright 2006 Meade Instruments Corporation, All Rights Reserved. ...
[ Сохраненная копия ]  Ссылки http://www.meade.com/support/lx200gps_faq.html -- 15.0 Кб -- 01.02.2006
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194. ASP: The Search for Planets Around Other Stars
... We devote this issue of The Universe in the Classroom to the search for planets around other stars. ... Why do we think there might be planets around other stars? ... Activity: Center of Mass Demonstration Stars are huge luminous balls of gas powered by nuclear reactions at their centers. ... That's because the star and the planet actually move around the center of mass of the star-planet system, the point where one would balance a seesaw holding the star on one end and the planet on the other. ...
[ Сохраненная копия ]  Ссылки http://www.astrosociety.org/edu/publications/tnl/19/19.html -- 25.7 Кб -- 02.10.2012
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195. Accuracy of World positional CCD observations of the numbered minor planets
... For reliable estimation of the accuracy of asteroid CCD observations we usually consider from ten or more various NUMBERED MINOR PLANETS (NMPs) observed during several nigths per month (more then 50 positions). ... They can be considered as an indicator of accuracy of the CCD positional observations with given MPC code. ... For any NUMBERED minor planet the (O-C) values must be zero if the errors of observations and the errors of its theory are absent. ...
[ Сохраненная копия ]  Ссылки http://www.accuracy.puldb.ru/METHOD.HTM -- 21.2 Кб -- 05.12.2007
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196. pynifs.velfit
... source code A class to hold information by fitting multi-component Gaussians to a NIFS data cube. Attributes: restwavl - The rest wavelength used to determine line velocities. vmin - The minimum velocity value used for generating the spectrum to fit to. vmax - The maximum velocity value used for generating the spectrum to fit to. scidata - The scidata from the fitscube, trimmed down so that it only includes the data between vmin and vmax vars - The variance ... Instance Methods . ...
[ Сохраненная копия ]  Ссылки http://www.mso.anu.edu.au/~mwhite/pynifs-doc/pynifs.velfit-class.html -- 50.1 Кб -- 27.02.2014
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197. Amateur Astronomers Association of Princeton
... The unlocked gate at the entrance to the observatoryтАЩs gravel driveway should remain closed to prevent the public from driving back to the observatory. ... This means that if there are still members of the public present at the observatory who do not wish to leave by 11:30 PM they will be locked in the park until a keyholder leaves and secures the gate(s) behind him/her. ... Roll the roof back using the hand crank near the computer room. ... Amateur Astronomers Association of Princeton, Inc., ...
[ Сохраненная копия ]  Ссылки http://www.princetonastronomy.org/keyholder_guide.html -- 38.2 Кб -- 29.03.2016
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198. Images of Supernova 1998S in NGC 3877
This page is devoted to information on Supernova 1998S in NGC 3877 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the Supernova links web page. On this page you will find a list of images of Supernova 1998S in NGC 3877 . ... VSnet now has a SN1998S web page with observations and light curve. Perpignan Observatoire 's 1998S web page . ...
[ Сохраненная копия ]  Ссылки http://www.sai.msu.su/mirrors/isn/snimages/sn1998S.html -- 41.5 Кб -- 05.02.2013
[ Сохраненная копия ]  Ссылки http://www.rochesterastronomy.org/SNIMAGES/sn1998s.html -- 42.3 Кб -- 10.04.2016
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199. Where On Earth Will The Sun Rise Earliest - an Astronomy Net Article
Where On Earth Will The Sun Rise Earliest . ... This imaginary circle around the earth at 66? 33' north latitude where the Sun is split in half by the horizon at noon during the winter solstice is called the Arctic Circle . ... So we are looking for a point on earth that is on or just barely west of the International Date Line (it has to be Saturday, January 1?not Friday, December 31) and on or just barely north of the Antarctic Circle, where the Sun rises from its brief arc below the horizon. ...
[ Сохраненная копия ]  Ссылки http://www.astronomy.net/articles/19/ -- 30.0 Кб -- 09.04.2016
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200. http://kcor.sai.msu.ru/arXiv1002.2360.pdf
... 000, 1ґ12 (2009) Printed 11 February 2010 A (MN L TEX style file v2.2) Analytical approximations of K -corrections in optical and near-infrared bands I1gor V. Chilingarian1 2 ,2,3 , Anne-Laure Melchior 1,4 and Ivan Yu. ... Received 2010 February 01; in original form 2009 August 14 ABSTRACT To compare photometric properties of galaxies at different redshifts, the fluxes need to be corrected for the changes of effective rest-frame wavelengths of filter bandpasses, called K -corrections. ... Table 1. ...
[ Текст ]  Ссылки http://kcor.sai.msu.ru/arXiv1002.2360.pdf -- 1631.3 Кб -- 12.02.2010
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