Next: Standard stars Up: Extinction and transformation Previous: Equations of condition . ... It is better to have 5 observations each of 30 standard/extinction stars, than to have 3 observations each of 50 stars; in the latter case, we are spreading the same observational weight over nearly twice as many parameters. ... In sum, though one can hardly have too many observations of standard stars, one should not go beyond the optimum number of stars recommended by the planning program. ...

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... Proposing for VLBI Time at Arecibo . ... Documentation (Field System, VLBA4 terminal, Mark 5 system) . ... In 2001, the Arecibo Observatory received its hybrid VLBA-MARK IV (VLBA4) data acquisition system, and currently NAIC commits Arecibo to support VLBI observing up to a maximum of 4% of the 305-m's observing time. ... Tracking Time (h:mm) . ... The inclusion of the 305-m Arecibo radio telescope can dramatically boost the sensitivity of VLBI observations, even with its limited source tracking...

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• INTRODUCTION to Spectral Line Observing at AO
• Arecibo Observatory L-Wide Band Receiver
• CIMA Auto-Observing

Selected (two) topical problems in solar / stellar modelling Stellar Astrophysics Centre Improving solar physics by studying other stars GЭnter Houdek The effect of the surface layers on the oscillation frequencies Asteroseismic ages and heavy-element abundances of the Sun solar-like stars Courtesy of J. Christensen-Dalsgaard IAU-GA-SP13 ­ Beijing ­ August 2012 Observed solar frequencies m-averaged frequencies from MDI instrument on SOHO Observed ...

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• http://www.stsci.edu/instrument-news/handbooks/nicmos/c10_backgrounds.doc4.html
• Obsolescent Acquisition Parameters
• WFC3 Instrument Handbook

The problem of solar wind data correlation for the observations onboard several spacecraft is very important for three points of view: . ... This problem is studied now in detail by systematic determination of ion flux and ion velocity data correlations by INTERBALL-1 (IKI group), WIND and IMP 8 (both - MIT group). ... Solar wind plasma correlation lengths from IMP 8, WIND and INTERBALL-1. ... Correlation of solar wind observations onboard several spacecraft: INTERBALL-1, IMP 8 and WIND data. ...

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• Space Research Institute (IKI) Seminar

... The experience of determination of the link between radio sources and dynamical reference frames is presented. To obtain this connection we used a series of very long baseline interferometry (VLBI) observations of the spacecraft Phobos-2 and angularly nearby quasars. ... The dynamical reference frame is determined by equator and equinox of these ephemerides. ... References . ... The relative orientation of the radio and dynamical reference frames can be described by a sequence of three rotations . ...

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• XXVIIth YERAC Contributions
• PPEUC Programme - Cosmic Microwave Background Workshop
• Possible manifestation of the gravitational lensing effect in single pulsar

... This section gives a brief description of each of the parameters available to SCHED that are specifically for VLA observations or are especially useful for VLA observations. ... Should be provided for non-VLBI observations. ... This used to be required in order to obtain calibration data for the VLBI observations. ... FREQ: and DOPPLER Warning -- these parameters cannot be used for non-VLBI observations at the VLA since they are only used to adjust the baseband converter frequencies. ...

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• Archive of VLBI Observations Majordomo List
• Flux density bootstrapping
• Standard Setup Files

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 2002 > cosmology2002 . ... Observing with ESO Telescopes . ... Public Surveys . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... Review: Weak Lensing . ... Tangential alignement of galaxies in a STIS Parallel shear survey field: a new dark lens candidate . ... Poster: . ... New Clues on clustering evolution from the K20 and FIRES surveys . ... data ...

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• Help for Night Report / Progress Pages
• ESO - La Silla Science Operations
• VLTI Calibrator Selection Help Page

Our group is involved in theoretical and observational research in several topics of star formation. ... The Arcetri group is carrying a coordinated effort to determine the kinematics and physical parameters of clouds where high-mass stars form. Massive stars form in association with solar mass objects from gas clouds of mass anywhere between one hundred and ten thousand times that of the sun. ... Disks around young stars: Inferring planet formation . ... Star Formation Group Page . ...

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• Program parameters
• mod_session_crypto - Apache HTTP Server
• mod_macro - Apache HTTP Server

... 172 ] Briefly, the count rate at the detector from a source at a redshift z is . ... Figure 55 shows the ``Green functions'' for the double compact binary merging rate   evolution assuming no collapse anisotropy. ... Another way that diverse peculiarities in the - distribution induced by the sources evolution could arise is connected with a possible non-monotonic character of the star formation rate in galaxies. ... 22 ] Figure  56 shows two-dimensional cuts through the parameter space. ...

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• Initial Distributions of Binary Parameters
• The Effect of Relativistic Wind on Accretion Flow Parameters
• Restrictions on the Scenario Parameters

Visual Discovery of SN 1996X in NGC 5061. ... It was not until the IAU Circular was issued that we found out there had been an independent amateur photographic discovery of this supernova by Kesao Takamizawa of Japan. ... Earlier in the week, 660 galaxies had been observed during two nights we had use of the 40 inch telescope at Siding Spring. ... The supernova in NGC 5061 was first seen with the smaller telescope about 10pm local time on Friday, April 12 (April 12.5 UT). ...

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• Contributions by amateurs: SN1995V.
• Contributions by amateurs: SN1995al.
• Contributions by amateurs: SN1997bp.

... Status of the numerical solutions and validation 2. ... Coupling of "solid" Earth components, e.g. core ­ mantle (Dehant et al.) ... Consistent relativistic formulation of Earth rotation (Gerlach, Klioner, Soffel) Status of the numerical solutions - 2 · The results from numerical solutions suffer from ­ Simplified solid Earth models ­ Incomplete Earth system models or neglecting of certain parts or neglecting of certain coupling mechanisms ­ Methodological limitations of computations...

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• http://www.gao.spb.ru/english/as/j2014/presentations/perepelkin.pdf
• Pulkovo NEO Page: Ephemeris Support

... Meta Index / Home Page This section documents the parameters recognized by this task (if any). Parameter . ... Constraints . ... in equation 1 must exceed this value for a source to pass. mindetml . ... For a source to pass, ii_DET_ML must be mindetml and ii_MASKFRAC must be minmaskfrac for at least one of the instruments ii. minmaskfrac . ... For a source to pass, ii_DET_ML must be mindetml and ii_MASKFRAC must be minmaskfrac for at least one of the instruments ii. numhexchar . ... 3.5 1.0 1.0 . ...

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Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Investigations of the ionospheric response to strong magnetics storms which are usual for our latitudes, are of great interest. ... In the figure, we present ionospheric parameter dynamics during three perturbed days in July 2000. ...

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• East Siberian Center for the Earth's Ionosphere Research. Capabilities and

... 8, ``Celestial Mechanics'', 2002 Using positional observations of minor planets for improving the orientation of star catalogue Yu. ... But expe­ rience shows that this kind of observations can be used succesfully for improving orientation parameters of star catalogues with respect to dynamical reference system. ... Observations of 90 selected minor planets were used in general solution for their orbital elements, orientation parameters and some parameters of phase re­ duction. ...

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• http://www.ipa.nw.ru/conference/2002/sovet/PS/KRASIN1.PS
• http://www.ipa.nw.ru/conference/2002/sovet/PS/MELNIKOV.PS
• http://www.ipa.nw.ru/conference/2002/sovet/PS/VIENNE.PS

... Second, the observatory can control the configuration, test data analysis procedures, and provide calibration solutions with the help of instrument models. This paper presents the VLT object-oriented framework for the development of ETCs (Exposure Time Calculators) and data simulators. ... Instrument simulations are being developed for the purpose of predictive calibration, instrument configuration control, and evaluation of data analysis procedures. ...

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• TransVERSE: An Architecture for Configuring Astronomical Observations
• An Observer's View of the ORAC System at UKIRT
• Electronic Submission of HST Phase I Observing Proposals

... He made observations of a supernova (literally: nova= "new star") in 1572 (we now know that a supernova is an exploding star, not a new star). ... Brahe's meticulous observations showed that the supernova did not change positions with respect to the other stars (no parallax). ... This was early evidence against the immutable nature of the heavens, although Brahe did not interpret the absence of parallax for stars correctly, as we discuss below. Brahe made careful observations of a comet in 1577. ...

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• Cosmological Issues for Theorists
• The Galaxy Gallery: Messier Objects
• Dark Matter in the Universe

. Intervals of available data are coded by blue color. To read availability charts user should know the descriptor ("name") of the KP subset of interest. Table annotations include also number of version for each subset. Plot resolution is exactly one pixel per hour. Data are considered as available if at least one data point is present during that hour.

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• AZ Key parameters, 1998
• AZ key parameters, 1996
• List of currently available KP AZ.

... We have observed and studied critical supercurrents, Ic, in cross-type Nb-Cu/Ni-Nb junctions with Josephson layers prepared from diluted ferromagnetic alloys. For suitable values of the exchange energy in the ferromagnet and the F-layer thickness we have observed Ic(T) oscillation with vanishing Ic for the definite values of T and dF. ... Critical supercurrents, Ic, in Nb-Cu(1-x)Ni(x)-Nb Josephson SFS junctions with F-layers prepared from ferromagnetic Cu(1-x)Ni(x) alloys have been studied. ...

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• Department of Solid State Physics MIPT

Databases (NSDC) of the Natural Planetary Satellites. ... NSDC: Database of astrometric observations of Natural Planetary Satellites . ... They are thoroughly looking for observations in different sources, creating their owndatabases which are then mostly inaccessible to other researchers. ... In the file "content" with explications, the reference is given to the data source as well as the bibliographic reference. ... Data sources. ... Why a specific bibliographic database for Natural satellites? ...

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• Data bases of Natural Satellites. Documentation. Sources

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

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• Project HILYS
• Database of Optical Properties -- Level: subpage
• AI SPbU library of scattering codes