... They are known: active quantum frequency standards on the ammonia molecules beams (molecular generator) on the hydrogen generator (hydrogen generator) passive quantum frequency standards on the Cs atoms’ beam (cerium atomic beam tube); active and passive quantum frequency standards with an optical pumping of Cs or Rb steams. The stability of atomic beam quantum frequency standard achieves 10^ - 14. ...

New reduction of minor planets photographic plates obtained with Pulkovo Normal Astrograph A.A. Berezhnoy Pulkovo Observatory of RAS, Saint-Petersburg, Russia Minor Planet observations at Pulkovo Periodical observations of 14 bright asteroids named Selected Minor Planets (SMP) were performed at Pulkovo since 1948 within the international framework started by works of B.V. Numerov and D. Brouwer. ... 108 133 113 74 124 67 97 88 14 84 64 5 20 19 Epochs (YYYY.MM) 1200 Mean values of total obs. ...

... Home Education Classes AAA Winter Astronomy Class: Measuring Distances in Space тАУ Dec 2015 тАУ Feb 2016 . ... Classes . AAA Fall Astronomy Class: Astronomy Basics тАУ October-November 2015 . AAA Winter Astronomy Class: Measuring Distances in Space тАУ Dec 2015 тАУ Feb 2016 . AAA Spring Astronomy Class: The Physics of Astronomy тАУ February - March 2016 . ... This MonthтАЩs Sky тАУ April 2016 . ... Dec. ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ...

... Speckle polarimeter (previosly known as Multimode Fast Camera MFC) is an instrument which will implement several observational methods of astronomy in visible (BVRI bands): speckle interferometry, polarimetry, speckle polarimetry (including polaroastrometry), and fast photometry. The speckle polarimeter will be installed in one of auxiliary Nasmyth ports of 2.5 m telescope of Sternberg Astronomical Institute. Speckle interferometry. ... Tests of speckle polarimeter at 2.5 m telescope. ...

ATM Forum Message . Forums: . ... Post . ... Measuring Resolution . ... Post Message | ... Posted by Amanda on April 20, 2007 22:08:30 UTC . ... resolution - rick_crockett - April 25, 2007 - 08:46 UTC . resolution - aschilli - April 30, 2007 - 00:08 UTC . Indoor resolution - rick_crockett - June 2, 2007 - 07:04 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... File Summary: ------------------------------------------------------------------------------- File Name Lrec Records Explanations readme 80 24 This file cat_3.dat 21 2444 Cepheid radial velocities ------------------------------------------------------------------------------- File cat_3.dat : ------------------------------------------------------------------------------- Bytes Format Units Explanations 1-5 Star ...

... Archaeoastronomers measure four important angles (see figure 3 and figure 4 ): . ... Because this angle does not change as the Earth rotates, astronomers use it to describe the positions of stars. ... For the North Star, the elevation equals the geographic latitude. ... Azimuth, the angle between north and the star (angle A in figure 4 ), measured along the observer's horizon. ... Astronomers are always using these angles to determine where to find a particular star at a particular time of year. ...

Solar Phys (2012) 276:97­112 DOI 10.1007/s11207-011-9883-6 Investigation of Hot X-Ray Points ( HXPs ) Using Spectroheliograph Mg XII Experiment Data from CORONAS-F/SPIRIT A. Reva · S. Shestov · S. Bogachev · S. Kuzin Received: 10 May 2011 / Accepted: 18 October 2011 / Published online: 24 November 2011 © Springer Science+Business Media B.V. 2011 Abstract Observations in the Mg XII 8.42 е line onboard the CORONAS-F satellite have revealed compact high ... Figure 7 Intensity variation of HXPs. ...

... Chilingarian, I., Melchior, A.-L., Zolotukhin, I. 2010: Analytical approximations of K -corrections in optical and near-infrared bands , MNRAS, v. 405, p. 1409 (also arXiv:1002.2360) . ... Calculator . ... calculate spectral energy distributions , K-corrections calculator , UKIDSS YJHK , K-corrections of galaxies , spectral based k-corrections , SDSS filter set K-corrections , K correction code IDL , kcorrect IDL C , . ...

. I measured my limiting magnitude on this picture at about Mag 18.9. I also did some photometry near for the SN positon, and I found a star liked object at about Mag 17.6. I think this object is 1999br. This image is deconvoluted, but I measured the magnitude pre-deconvulution. Kereszty Zsolt . Hungary, Miskolc . Back to Bright Supernovae . David Bishop Last modified: Thu Apr 15 11:44:03 EDT 1999

... Testing of the Ground Based VLBI Stations Yevpatoria ­ Simeiz ­ Pushchino of the RadioAstron Mission A. E. Volvacha, V. I. Kostenkoa, M. G. Larionova, L. N. Volvacha, D. M. Muchab, A. S. Nabatovb, A. M ... and A. V. Kovalenkoa a Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia b Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkiv, Ukraine e mail: mgl@asc.rssi.ru Received December 16, 2013 Abstract ... Fig. ...

. Comment on J1225+1253 . Early 2.3 GHz VLBI observations (Jones, Terzian & Sramek 1981) indicate an elongated source structure in the N-S direction, in agreement with our image. Giovannini, Feretti & Comoretto (1990) measured a 180 mJy correlated flux density at 1.6 GHz on the shortest VLBI baselines. VLBApls home page . Last modified: 16 Oct 2000

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Although their determination is based on the scattering process model, independent check-ups by rocket experiments have shown their correctness in experimental applications. ... Ionospheric data analysis, especially during strong disturbances, cannot be without some other kinds of diagnostic tools. ... The lack of data has always been a challange in this case. ...

A&A 467, 991­1001 (2007) DOI: 10.1051/0004-6361:20066758 c ESO 2007 Astronomy & Astrophysics Metallicity and age gradients in round elliptical galaxies M. Baes1 , O. K. Sil'chenko2,3 ,A.V. Moiseev4 , and E. A. Manakova2 1 2 3 4 Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium Sternberg Astronomical Institute, University av. ... We probe the stellar population age and metallicity distributions in nearby elliptical galaxies over the largest extension to date. ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...