... Home Observing Solar Bridge Across New York Harbor . ... Clear Sky Chart . This Month's Sky . ... 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 . ... Amateur Astronomers Medal . ... Get on board with the Amateurs Astronomers Association, Sunday, September 20th, 2015 . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

. XMM-Newton Science Analysis System . eposcorr (eposcorr-3.12.1) [xmmsas_20080701_1801-8.0.0] . Meta Index / Home Page / Description At the moment we have no rigurous mathematical method to handle the statistical errors of the offsets found. For the moment we use the square root of the second order moment in as a function of off-set divided by the number of optical counter parts. XMM-Newton SOC/SSC -- 2008-07-01

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... RADIATION AND ECOLOGICAL MONITORING . ... OF MEASURING CHANNELS . Parameters of ecological fields measured by ARES . Parameter measured, . ... Volumetric activity of gases radionuclides in the air, Bq/m 3 : . ... of inert gases . ... Volumetric activity of a- and b-active aerosols, Bq/m 3 : . ... Concentration of nitric oxide NO, mg/m 3 . ... Meteorological parameters measured by ARES . ... 0.5 + 0.05 V), where V - measured wind velocity . ... Official WEB-site of S.P.Korolev RSC Energia . ...

... Almost all DSOs require a telescope to see in any detail at all, though some can be detected with just binoculars, and a few can be barely seen with the unaided eye. ... DEGREE: Distances on the sky (sometimes called the celestial sphere) are measured in angular degrees rather than inches or feet. ... The magnification is the focal length of the telescope divided by the focal length of the eyepiece. ... Short focal length eyepieces are also termed high power, long focal length are low power. ...

... View on Arno from the opposite side of ponte S. Niccolo. b06. ... A view on east of Florence from the climb to piazzale Michelangelo. b10. ... Old city wall going from piazza Poggi to Forte di Belvedere. b20. ... Gate near Forte di Belvedere. b23. ... On costa San Giorgio (going down from Forte di Belvedere to palazzo Pitti). b34. ... Giardino di Boboli, stadium. c02. Palazzo Pitti; view from Giardino di Boboli. c03. ... Giardino di Boboli . ... Palazzo Pitti; view from Giardino di Boboli. c12. ...

... OOF . ... OOF Index . ... OOF software . ... Fits up to fifth order . ... These are experimental data currently being analysed, not final documentation of research. ... Only fitting for Zernike orders up to and including 3rd to concentrate on finding possible off-axis aberrations. ... The results below show that when fitting for all Zernikes up to and including fifth order, the output maps vary greatly between pixels. As above, but fitting up to fifth order Zernike polynomial. ...

... click image to view discuss) . ... This is a quick shot of the near-Earth asteroid 2005 YU55 using four consecutive exposures from the Harvard MicroObservatory robotic telescope in Amado, Arizona, on the night of Nov. ... 10, 2015 . This is Comet Lovejoy C/2014 Q2 as it appeared at about 10:30 pm Saturday, Jan. 10, 2015, from my back yard in Belmont, MA, about 5 miles west of downtown Boston. ... Main image: 0.6 second exposure. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

This lesson is intended as a revision of basic direct-current (DC) circuits . It was discovered in the 19th century that certain materials (so-called ideal resistors) have a current through them I that is proportional to the potential difference (voltage) across them V. This is not a fundamental law of physics (like momentum conservation) but is an observed behavior which some materials roughly follow (like the friction law we covered earlier in the course). ... This equation is called Ohm's law. ...

... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...

Astronomy Discussion Forums . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... New Model: How Do The Sun And Moon Appear To Move Across The Sky . ... Post Message | ... focused on the Sun and the Moon as they appear from the given location of the Earth surface: . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... 2001: . The distances to 50 galaxies in the vicinity of three most nearby galaxy clusters were measured. The radius of the "zero velocity sphere", isolating each group from the cosmological expansion is in the range from 0.95 to 1.25 Mpc for these groups, leads to the estimates of the total mass of groups ranging from 1.2 to 2.7 trillion solar masses. These results agree with the value of the mean matter density in the Local Universe from 0.05 to 0.10 in critical density units. ...

... The Wide Field Spectral Imager ( WISPI ) seen here in the Roll Roof Facility provides visible and near-infrared spectra of the sky across 4 degree fields. ... A computer controlled mounting automates the acquisition of 2-D rastered spectral images. ... Light from the sky enters the large 400mm lens at top center, is imaged on the slit, collimated by the smaller 180 mm lens, and diffracted by the grating at the bottom toward the 200mm lens and CCD camera on the right. ... Camera - 200mm f/2 Nikor ED ...

... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... SUBJECT: 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... which will be held in Beijing, P.R. China, from August 25-29, 2014, hosted by Chinese Academy of Sciences . ... China), . ... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. ...

... Average resolution at altitude H=668 km . ... Swath width at H=668 km and inclination of beginning of swath 20.48 degrees . ... Resolution at H=668 км . ... Наименование параметра . ... 1 канале . ... Полоса обзора при H=668 км . ... 1-5 спектральной зоне, не более . ... 1 спектральной зоне . 0,48-0,52 мкм . ... 0,915-0,997 мкм . ... 1-4 канал . ... 1-4 каналов . ... Спектральные характеристики каналов (по уровню 0,5): . ... For more information send a mail to: info@sputnik.infospace.ru . ...

VIEW OUT OF THE WINDOW FROM ARIZONE, USA . ... Our whole class was excited to share with you what we see when we look out our window here, in Chandler, Arizona. Our classroom has no windows, so we decided to go outside on February 2, 1998, and describe to you what we see. You look out across the desert and you see endless roads and it sees almost as if you are in a dream. It's cold; about 65 degrees F (cold for Chandler, anyway) and there has been a touch of fog this morning. ...

M. D. Neusel Texas Tech University Lubbock, United States mara.d.neusel@ttu.edu Degree b ounds, the regular representation, and invariants of p ermutation groups in general Let F be a field, G a finite group, and consider a faithful representation of G : G GL(n, F) of degree n over F. Via the group G acts on the vector space V = Fn , hence on the dual space V , and thus on the symmetric algebra on the dual, denoted by F[V ]. ... Let : G GL(n, F) be an arbitrary nonmodular representation. ...

Milky Way X-ray background emission « »: , . ... RXTE , . ... Using near-infrared Galaxy intensity measured with COBE/DIRBE experiment and X-ray data from RXTE and INTEGRAL it was shown that X-ray brightness of the Galactic background emission closely follows its stellar density and can be explained by a cumulative emission of a large number of weak Galactic X-ray sources. ... Map of Galactic background emission in hard X-ray energy band obtained with INTEGRAL observatory. ... 2006, &, 452, 169 ., ...

... We measured the bolometer responsivity and the noise equivalent power (NEP) by applying a modulated current through the heating tunnel junctions and absorber. ... The electromagnetic signal is received and concentrated by a large antenna and through the capacitance of the superconductor-insulator-normal metal (SIN) tunnel junction is supplied and converted into heat in the the absorber with a small volume. ... The inner tunnel junctions were used to measure the electron temperature of the absorber. ...

... The Science Operation Department is composed of Astronomers, Telescope Instruments Operators(TIOs) and Data Handling Administrators(DHAs). ... Astronomers have proposed several methods to quantitatively measure the amount of turbulence above the telescope, which the most common ones is Differential Image Motion Monitor (DIMM). In optical testing, the Hartmann test is the common method to test the quality of optical components. ... Hartmann mask consists of 48 lenses. ...