... In the case of the 2.5-m telescope primary mirror, the support actuators are air pistons. The 48 axial and 18 transverse air pistons support the axial and transverse components of the mirror weight vector respectively. ... Piston force . ... To measure the response of an air piston to transverse forces, a transverse piston was loaded with 11 kg lead bricks and pressurized using a syringe (Figure 3). ... Figure 4: The air piston acts like a spring with hysteresis in response to a side force. ...

... Archives . ... One realization of mine during the meeting was related to a cultural difference; therefore, there is no relation to any presentations during the 212th AAS in this post. ... I cannot cover all perspectives from both disciplines but I think there are two distinct fashions in practicing normalization. $$\frac{1}{N(\theta)}\int_{\Omega} f(x;\theta)dx=1$$ . ... This is my last posting on my first AAS . Tags: AAS , measure , measure theory , normalization , PDF , pmf . ... Chandra Blog . ...

... Each Digicon diode has its own discriminator, and if they are properly set the dark count rate measured is very low. On-orbit measurement has shown that both GHRS detectors have a dark rate less than the design goal of 0.01 counts diode-1 sec-1 at low geomagnetic latitudes and that the dominant noise source is cosmic rays. ... Do not use CENSOR if the expected count rate exceeds about 100 counts per second per diode because real photon events will be rejected. ... Count Rate Linearity . ...

Next: Caverns in Binary Systems Up: Ejectors in Massive Binary Previous: The Number of Ejectors . In the very first years after the discovery of radiopulsars, it became clear that for some reason they avoid forming binary systems. ... Illarionov and Sunyaev (1975)[ 76 ] noted the fact that coherent radiowaves with a wavelength longer than 75 cm, which make it possible to observe most of the radiopulsars, are absorbed effectively in the stellar wind of a normal star. ...

... Three ` flavours'of binning and discard: · Discard 9 rows , readout 1 row, cut 10:1, resolution 1.75ms · Discard 90 rows , bin 10 rows , cut 10:1, resolution 2.76ms · Discard 95 rows , bin 5 rows , cut 20:1, resolution 2.76ms · Compared with normal timing : · 100 rows and readout, no cut, resolution 1.75ms Bin · Tested on XMM on Crab during rev 333 - 3 October 2001 Crab - rev 333 - Bright timing ... Counting mode and FIFO full errors. ... Crab - rev 333 - Bright timing mode ...

... casa::Normal . ... Normal ( RNG *gen, Double mean=0.0, Double variance=1.0) . Construct a random number generator for a normal distribution. virtual . ... Returns a value from the normal distribution. virtual Double . ... These function allow you to manipulate the parameters (mean & variance) described above through the base class. virtual Vector < Double > . ... The second and third arguments define the parameters for this distribution as described in the synopsis. virtual casa::Normal::~Normal . ...

... MIPT Solid State Physics Department . ... Interacting Electrons in Normal Metals . ... The course is an introduction to interacting Fermi-particle physics and intended for future experimentalists. ... Hartree-Fock approximation. ... Linear reaction function. Calculation of density-density reaction function. Relation of density-density reaction function to compressibility of Fermi liquid and thermodynamic state density. ... Density-density reaction function of free Fermi gas in long-wave limit. ...

... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

... An accurate two dimensional geometric correction over the entire frame is an important part of the whole reduction process. ... Logically, it often makes sense to separate the geometrical transformation into two orthogonal components: the dispersion relation , which can be obtained from an arc spectrum with a fully illuminated slit and the distortion along the slit , which can be derived from the continuum spectra of point sources. ... Getting the Dispersion Solution . Distortion Along the Slit . ...

GALFACTS MEMO: # 10 ALFA RFI Saturation Problem J. S. Dever 20 Decemb er 2006 1 Overview Observations made with ALFA can be partially or completely lost due to strong RFI saturating a component in the receiver chain. ... A determination of where the saturation is occuring should be made, and the problem solved. ... 1 Radar RFI 1.35 1.3 1.25 Power 1.2 1.15 1.1 16750 16800 16850 16900 Time 16950 17000 17050 Figure 1: Band average plot for 135 seconds showing the effect of Radar RFI in the continuum. ...

Next: Feature enhancement: local Up: No Title Previous: Feature enhancement: filtering . ... As a result, a common magnitude scale (contour lines on the maps above, or color scale on Fig.1) will poorly display the short-duration events in a signal. Normalizing each line of the map (fixed duration) so it has unit variance (in effect dividing the energy map by the mean energy spectrum) at each duration restores more details of small-scale activity (Fig. ...

... What causes the mysterious gamma-ray bursts? Indicated in this Hubble Space Telescope exposure of an otherwise unremarkable field in the constellation Crater, is the dwindling optical afterglow of a gamma-ray burst first detected by the Beppo-SAX satellite on 2001 December 11. ... NGC 4414: A Flocculent Spiral Galaxy . ... The above true color image of flocculent spiral galaxy NGC 4414 was taken with the Hubble Space Telescope to help answer this question. ... Centaurus Galaxy Cluster in X Rays . ...

... GSAOI Home . ... Science . ... The goal of this project is to detect the termination of the white dwarf cooling sequence in nearby open star clusters, and hence derive cluster ages that are independent of the normal main sequence turnoff method. ... The potential for accurate proper motion measurements, i.e., measurements of transverse motion across the sky, with GSAOI offers a means of overcoming this difficulty. ...

... 2001 May 1 . Antarctica Hears Little Normal Matter in the Big Bang . ... Sunday, independent collaborations behind three such instruments announced evidence that overtones heard are consistent with our universe having only about five percent normal matter and 95 percent dark matter or dark energy . This amount of normal matter was expected were our universe to have undergone a particularly explosive early phase of the big bang known as inflation . ... About APOD | ...

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. ...

... Кресла . ... Размер: XS . ... Цвет: белый . ... Размер шлица: PZ2 ; . ... Цвет: Фиолетовый . ... Глубина: 90 . ... Цвет: черный . ... Цвет: серый . ... Размер INT: 54 . ... Глубина пропила: 90, . ... Макс. глубина пропила под углом 90њ: 90, . ... Размер площадки: 800x550, . ...

Full-Text Search . ... astro-ph . ... SAI VO . Search sort results by Date Relevance . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . Normalized to: Even, W. 20 article(s) in total . 72 co-authors, from 1 to 17 common article(s). ... Craig, William. ... Filippenko, Alexei V.. ... Heger, Alexander. ... Holz, Daniel E.. Hungerford, Aimee L.. ... Stern, Daniel. ... Whalen, Daniel. Wheeler, J. Craig. ... SAI MSU . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Between 20 and 100 meteors per hour are expected, with some experts predicting a peak ranging upwards of 500 to 1,000 meteors per hour. Countries of Europe, northern Africa and the Middle East are best placed to see the event. ... The night of the meteor shower coincides with "International Observe the Moon Night" , and assuming the skies are clear there will be an opportunity to see both the planet Jupiter and the Moon. ...

... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Galaxies . ... ESO Science Newsletter . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... ESO Science Outreach Network . ... This is an image of the most distant "normal'' galaxy known, G 0102 190, as seen on a CCD exposure obtained with the EFOSC II instrument at the ESO New Technology Telescope. ...