ALMA | ... In this section, we explain why we need to correct phase fluctuations and ALMA's strategy to do this. Rapid fluctuations will be corrected with water vapour radiometers (WVRs). The Cavendish Astrophysics Group was also a leading contributor to the ALMA prototype WVRs, which were put through their paces in tests at the Submillimeter Array (SMA). ... The Cavendish Astrophysics Group in partnership with the Onsala Space Observatory built two prototype WVRs for the ALMA project. ...

Еще в разделе: (Показать все результаты (>1436) - www.mrao.cam.ac.uk/ )

• Bojan Nikolic -- Simple smoothing of astronomical images in FITS format
• Inference of Coefficients for Use in Phase Correction Bojan Nikolic web pages

... Virtually all detectors and telesco pes are sensitive to only a particular range of frequencies or wavelengths. ... Flux per unit wavelength or frequency So in practice, when we measure how much radiation we receive from some object, we usually mean the energy at some particular frequency, not the integral of the energy over all frequencies (which would be the bolometric brightness). ... But imaging data at UV, optical and IR wavelengths often uses a different approach: broad-band imaging. ...

Еще в разделе: (Показать все результаты (>639) - www.mso.anu.edu.au/ )

• Filter Throughput Curves
• Paul Francis -- Astronomical Constants
• Pink Black Holes: Frequently Asked Questions

... In one situation, we can use light from quasars to probe the material between us and them because that light may pass through one or more galaxies or gas clouds on its way to us. The gas inside the galaxies or the intergalactic clouds acts then as a filter, absorbing selected wavelengths from the quasar light. ... Light from a quasar must pass through clouds of gas and even faint galaxies -- each leaving its imprint on the light -- before we receive it here on Earth. ... Gravitational lensing . ...

Еще в разделе: (Показать все результаты (>1048) - www.astrosociety.org/ )

• ASP: Making a Rainbow
• ASP: Good Astronomy Activities on the WWW
• ASP: Eclipse Watching: Making a Solar Filter

... The Galway Astronomy Club are pleased to announce details of their upcoming Astronomy Festival to take place at the 4* Westwood House Hotel from Friday February 12th to Saturday February 13th 2010. The event will be styled in the same manner as this year (which worked very well) and will have ten different speakers. ... Dr Aaron Golden NUI Galway: тАЬHas Earth Contaminated the Solar System? тАУ the Case for Life on MarsтАЭ . ... International Year of Astronomy, Ireland National Node . ...

Еще в разделе: (Показать все результаты (>2492) - star.arm.ac.uk/ )

• Observations with the Faulkes Telescopes
• Gary, Callum and Peter: `Stars' of the Future
• Armagh Observatory

RTT150 . ... Image was taken in February 2002. CCD ST8 +A07 and RGB filters with 5 minute exposure in each filter. Total exposure is 30 minutes. ... RTT150, F/16, CCD ST-8E, filters R (exposure 0.11 s), G (0.18 s) and B (0.26 s). ... RTT150, F/16, CCD ST-8E, exposure 0.11 s. Orion trapezium. RTT150, F/7.7, CCD ST-8E, filter U, exposure 0.3 s. Atmosphere stability is better than 1".1. ... RTT150, F/7.7, CCD ST-8E, filters R, V, B, exposure 30 s in each filter. ...

Еще в разделе: (Показать все результаты (>291) - hea.iki.rssi.ru/ )

• Fast search through RTT150 data archive
• RTT150 Technical Description

... 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 . ...

Еще в разделе: (Показать все результаты (>618) - www.aaa.org/ )

• AAA Winter Astronomy Class: Measuring Distances in Space тАУ Dec 2015 тАУ Feb
• AAA Spring Astronomy Class: The Physics of Astronomy тАУ February ? March 2016
• High Line ? Solar Observing ? Amateur Astronomers Association of New York

Laboratory work N7 Low-pass filtering. 1) Generate the signal with two periodic components and high-frequency noise. ... 2) Perform it's filtering with Panteleev filter 0 - h(t) = e 22 0 |t| 2 0 t 0 |t| cos + sin 2 2 , where 0 is a parameter. The frequency response of the Panteleev filter is ^ h( ) = 4 0 . 4 0 + 4 Select the cut-off frequency (by varying 0 ) for filtering out high-frequency periodic component and noise. 3) Plot the initial and filtered signal. ...

Еще в разделе: (Показать все результаты (>307) - lnfm1.sai.msu.ru/ )

• http://lnfm1.sai.msu.ru/grav/english/lecture/filtering/Lab4.doc
• http://lnfm1.sai.msu.ru/grav/english/lecture/filtering/Lab2.doc
• http://lnfm1.sai.msu.ru/grav/english/lecture/filtering/Lab1.doc

Here is a description of the Filter/Driver Pack Plus release from Aldus. ... The Macintosh Filter/Driver Pack Plus includes several new and updated filters, including import filters for Microsoft Works 3.0 and MacWrite Pro files, as well as the most recent LaserWriter driver, version 8.1.1. ... The Filter/Driver Pack Plus also includes a patcher utility which will update PageMaker 5.0 to version 5.0a. This patcher corrects a handful of reported customer problems. ...

Еще в разделе: (Показать все результаты (>3095) - crydee.sai.msu.ru/ )

• Feature enhancement: filtering and denoising
• Thomson's method of spectral estimation
• Index of /ftproot/pub/rec/music/lyrics/cs-uwp/f/filter

Easy DMT: Using the chInterface Class to Create/Upgrade DMT Monitors Rauha Rahkola, Univ. of Oregon LSC Meeting, August 19-22, 2002 LIGO Hanford Observatory Richland, WA LIGO-G020349-00-Z Easy DMT Introduction to the chInterface utility class ! ... Run through the data 1. for each channel, either: ! ... Final report LSC Meeting, August 19-22, 2002 Hanford 3 LIGO-G020349-00-Z Easy DMT The chInterface Model ! ... No Yes Yes Defaults to RMS of data addChannel addFilter New channel? ...

Еще в разделе: (Показать все результаты (>412) - zebu.uoregon.edu/ )

• U of O High Energy Physics Seminars
• Venus and Mars

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Telescopes and Observatories . ... The majestic star-forming region in the Lagoon Nebula. The pale ring to the right is an internal reflection in the telescope.€а (Image credit: ESO/ VPHAS+/ V. Kalari and J. Vink (Armagh Observatory) . ... The 18 component images were further processed twice. ... Venu and his colleagues use images like this to identify individual young forming stars in the Lagoon Nebula and determine their ages. ...

Еще в разделе: (Показать все результаты (>2824) - www.armaghplanet.com/ )

• February | Astronotes
• Wonders of the February Night Sky | Astronotes
• Mars | Astronotes

. NEVER look directly at the sun without a proper solar filter! . We have lots of different equipment available for use. Here you see our 6" solar filters. Our club always recommends that you use a FULL APERTURE solar filter. In the picture you will notice a TYPE 2 filter for VISUAL use and a TYPE 3 filter for PHOTOGRAPHIC use. Here is an easy way to remember which type solar filter you need for VISUAL OBSERVING: You have 2 EYES so you need a TYPE 2 filter!! .

Еще в разделе: (Показать все результаты (>141) - www.wro.org/ )

A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...

Еще в разделе: (Показать все результаты (>67) - space.univ.kiev.ua/ )

• Laboratory static Fourier-spectrometer

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

Еще в разделе: (Показать все результаты (>335) - www.astro.spbu.ru/ )

• Introduction
• Current state

... Detailed information about each program can be found in the separate manual pages. blockmean L2 (x,y,z) data filter/decimator blockmedian L1 (x,y,z) data filter/decimator blockmode Mode (x,y,z) data filter/decimator filter1d Filter 1-D data sets (time series) fitcircle Finds the best-fitting great circle for a set of points gmtconvert Convert between ASCII and binary 1-D ... Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and Display Data, EOS Trans., ...

Еще в разделе: (Показать все результаты (>533) - xray.sai.msu.ru/ )

• http://xray.sai.msu.ru/~ivan/gmt/man/splitxyz.html
• http://xray.sai.msu.ru/~ivan/gmt/man/grdfilter.html
• Detection rate of binary compact star merging

Here is one CCD image of the SN. ST7 image format. Dark and flat corrected, Mar 19,1998 at.01.11 UT, yellow filter, temp -20c, 600s track and accumulate exposure (20x30s). The telescope used is 150/2063mm refractor. ... The next image was taken at 29.3.1998 01.27 UT, CCD ST-7, 600 s. Track and Accumulate exposure (15x40s.), no filter, dark and flat corrected, temp -20c, telescope used 2063/152 refractor. ... Back to Supernovae in NGC and IC galaxies . Back to Supernova 1998S images . ...

Еще в разделе: (Показать все результаты (>674) - www.rochesterastronomy.org/ )

• Supernova 1998ab in NGC 4704
• Supernova 1998W in NGC 3075
• Supernova 1998an in UGC 3683

... Basic Observables: Zero-differenced phase and code ionosphere-free combinations of global GNSS network stations, corrected by P1-C1 satellite code biases (cc2noncc), daily observations with 30 seconds sampling rate Sites coordinates : IGb08 reference frame coordinates and velocities Displacements: solid tides, ocean loading, pole tide loading (IERS 2010) Geometric model : Receivers antennas eccentricities, absolute receiver and ...

Еще в разделе: (Показать все результаты (>299) - www.gao.spb.ru/ )

• Magnetic fields database
• Selection from the database
• ASTROMETRIA

... Sky Pollution Rejection Filters and What They Reveal About Nebulae . ... Thursday, Jun 14, 2012 at 8:00 PM . Our speaker will demonstrate how filters such as Orion Telescope's Ultrablock filter allow observers to see emission nebulae clearly even when the sky is polluted because of nearby lighting. ... Please join us for a pre-meeting dinner discussion at Changsho, 1712 Mass Ave, Cambridge, MA at 6:00pm before the meeting. ... Jun . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Еще в разделе: (Показать все результаты (>415) - www.atmob.org/ )

• Mars pictures from Stellafane by Paul Valleli
• Venus 2004 transit photo collection

Each point in this graph represents one star in NGC 2808. The vertical axis represents the brightness (as measured through Hubble's near-infrared F814W filter) of the stars (the brightest stars near the top). The horizontal axis represents the colours of the stars, with bluer stars to the left and redder to the right (blue magnitude minus near-infrared magnitude). ...

Еще в разделе: (Показать все результаты (>3927) - www.astronomy.com/ )

• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B3814D01A-9204-471D-9E59-EB41345B7F52%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BE160D4C4-A921-49CE-96D8-671AB9DC09AE%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B329F799B-2917-43A6-9B75-24A43C363B30%7D

Ivan DYNNIKOV (MSU, Moscow): On the complexity of braids . We define a measure of "complexity" of a braid which is natural with respect to both an algebraic and a geometric point of view. ... The geometrical complexity is some natural measure of the amount of distortion of the $n$ times punctured disk caused by a homeomorphism. Our main result is that the two notions of complexity are comparable. ...

Еще в разделе: (Показать все результаты (>555) - www.mccme.ru/ )

• Laminations and group actions in€аdynamics
• Basic set theory (Spring 2003)
• Conference "Combinatorial Methods in Physics and Knot Theory" (Moscow, February

The project of the informational system creation on the problem of evolution of radio galaxies, as a part of the "Big Trio" project aimed on studing of distant radio galaxies, is designed. This system allows a user to operate with simulated curves of spectral energy distributions (SED) to estimate ages and redshifts by photometry data. Authors use SEDs of several models for different types of galaxies. ... The HTTP and e-mail access is organized to this system. ...

Еще в разделе: (Показать все результаты (>37) - sed.sao.ru/ )

• Description of SED models
• Description of system SEDs