... scattered light in flats less than 0.5% across 5' field of view . scattered light in flats less than 0.5% across entire field . ... no greater than 10% across field, and calibrateable to better than 1%. no greater than 5% across field, and calibrateable to better than 0.5%. ... provide unvignetted illumination across detector with new SDSS filter set . ... throughput stable to better than 0.5% over course of a night. throughput stable to better than 5% over thermal cycling and seasonal variation . ...

Mercury Summer 2011 Table of Contents . ... A Hubble Space Telescope view of a segment of the Coma Cluster of galaxies, one of the densest known galaxy collections in the universe. ... In 1998, competing teams of astronomers were forced to come to grips with increasingly convincing observations that the expansion of the universe was accelerating , rather than decelerating (as they expected). ... Its discovery resulted directly from measurements of the distances to remote galaxies. ...

Introduction This catalogue contains mainly the atomic data needed in the astrophysical investigations of low-density plasma. It is a revised and extended version of the "Catalogue of Atomic Data for the Rarefied Astrophysical Plasma" (Golovatyj et al. ... Low-density plasma. ... In the present study we represent only the atomic data for computation of sp ectra of low-density astrophysical plasma (most known kinds of it are gaseous nebulae), their thermal and ionization structure. ...

Ground Support of RadioAstron . Control and Tracking Stations . RadioAstron satellite control (command transmission, telemetry, orbit measurements) will be conducted from Evpatoria and Bear Lake control stations. ... Coarse orbit measurements will be carried out from control stations. Each measurement takes ten minutes. ... Orbit measurements at tracking stations give only radial component of spacecraft velocity but the measurements are going continuously during observing sessions. ...

The technical memorandum: Time and Time Interval Measurement with Application to Computer and Network Performance Evaluation (PostScript) describes a number of techniques for conducting experiments typical of computer network and transmission systems engineering. ... The usual data collected during a performance run of some experiment might include time offsets, time delays, frequency offsets and various error statistics. ...

. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

... 19.10.2000 . ... What is known is that satellites across our Solar System reported on 2000 January 31 a tremendous explosion of gamma rays had occurred towards some previously uninteresting direction. Soon one of the largest optical telescopes on Earth, a VLT in Chile, began to peer in the direction of the gamma ray burst . ... Publications with keywords: gamma-ray burst - cosmology - explosion - afterglow . Publications with words: gamma-ray burst - cosmology - explosion - afterglow . ...

... Measuring the Distances to Supernovae . Professor Robert Kirshner . Thursday, Oct 11, 2012 at 8:00 PM . This month our speaker will be Professor Bob Kirshner of Harvard University who will speak to us about measuring the distances to supernovae which was the key to the discovery of the accelerating universe that won the 2011 Nobel Prize. ... Oct . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Introduction Marconi Applied Technologies have developed a new low light level TV-type CCD image sensor (LLCCD). ... Current low light imaging technologies One of the challenges in low light level imaging is to reduce the effects of the various noise contributions. ... 2.3 Intensified CCD imaging [ICCD] At TV rates, the conventional way to image at low light levels is to amplify the signal before the noise from the CCD sensor is introduced. ... SNR Vs Illumination (Measured) Figure 4. ...

... Ergodic theory of noninvertible transformations, MCCME, Moscow, 2004. ... Introduction to the modern theory of dynamical systems, Cambridge Univ. ... Ergodic theory, M.:Nauka, 1980. 382 pp. ... Action on measures, notion of a transfer operator, invariant measures . ... Birkhoff ergodic theorem . ... Main ergodic constructions: . Direct and skew products . ... Natural extension and noninvertibility . ... Direct operator formalism: . ... Spectral theory for Koopman and transfer operators . ...

. The frequency of the spectral maximum f m of the gyrosynchrotron emission vs. the column density of accelerated electrons calculated according to Dulk & Marsh (1982). Curves are shown for various power-law indices ? el of the electron spectrum and magnetic field strengths B . The angle between the line of sight and the magnetic field is 45 degree.

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. ...

Physica C 453 (2007) 12­14 www.elsevier.com/locate/physc Superconducting temperature of the x-phase in Ti, Zr and Hf metals at high pressures I.O. Bashkin *, V.G. Tissen, M.V. Nefedova, E.G. Ponyatovsky Institute ... Chernogolovka, Moscow District, Russia Received 27 November 2006; accepted 29 November 2006 Available online 24 January 2007 Abstract The superconducting transition temperature of the Ti metal is measured in dependence on pressure to 56.0 GPa ... Phys. 35 (1963) 732. ...

Next: Special Cases: Supernova Explosion Up: Change of Binary Parameters: Previous: Mass change . The binary separation a changes differently depending on the mass exchange mode. ... If the mass transfer is conservative ( , i.e. const) and one may neglect the redistribution of the intrinsic angular momenta of the components, the total orbital momentum conservation law implies . ... the orbital separation always increases in such systems). ...

Improvement and New Results of the Laser Time Transfer on MEO satellites Meng Wendong, Zhang Haifeng, Yang Huafeng, Chen Wanzhen, Wang Jie, Ivan Prochazka , Zhang Zhongping Shanghai Observatory, CAS China Academy of Space Technology Czech Technical University Goals of Laser Time Transfer ( LTT ) · Evaluate the performance of the space rubidium clocks with respective to the ground hydrogen maser, dedicated for the Compass ...

... Archives . ... Magnitude [Eqn] . ... Differential Emission Measures (DEMs) are a summary of the temperature structure of the outer atmospheres (aka coronae) of stars, and are usually derived from a select subset of line fluxes. ... is called the Differential Emission Measure and is a very useful summary of the temperature structure of stellar coronae. ... Tags: DEM , Differential Emission Measure , EotW , Equation , Equation of the Week , stellar coronae . ... Comment ( RSS ) | ... Chandra Blog . ...

... 2*1018 /1/2, , 0.1 , 1.6 , 1 350 , 100 , 5*10 20 - 3. 10-100 10-100 , . ... Integrated structures comprising cold electron bolometers and twin-slot antennas have been studied in the temperature range 0.06-3 K. Dynamic resistance ratio and optical response was measured for 2-15 K black body radiation temperature. ... 12000 290 10000 RR Te 280 Electron temperature, mK 270 Resistance ratio, Rd/Rn 8000 260 250 6000 240 4000 230 220 210 0 50 100 150 200 250 300 2000 Phonon temperature, mK 3. ... 0.1 . ...

. UNIX provides utilities for transferring files and directories from one host to another. Look at the section on "Preparing files for transfer" before going on to use the file transfer utilities. Preparing files for transfer . Copying files between hosts . Transferring files .

... 50 Greatest Mysteries . ... Hubble shows Jupiterт??s Great Red Spot is smaller than ever measured . ... GREAT RED SPOT . Jupiter s trademark Great Red Spot a swirling anti-cyclonic storm larger than Earth has shrunk to its smallest size ever measured. According to Amy Simon of NASA s Goddard Space Flight Center in Greenbelt, Maryland, recent NASA Hubble Space Telescope observations confirm that the Great Red Spot now is approximately 10,250 miles (16,500 kilometers) across. ... Bead Show | ...

... 1 300, . ... 1 100 . ... 4 0.2 5 pixel number 10 15 20 pixel number 5 0.15 intensity 10 0.1 15 20 0 0.2 0.15 0.1 0.05 0.05 5 10 15 pixel number 20 5 10 15 pixel number 20 0 0 5 10 15 pixel number 20 1 0.8 0.6 0 OTF 0.4 0.5 0.2 0 -0.5 0 frequency/fd 0.5 -0.5 frequency/fd frequency/fd -0.5 0 frequency/fd 0.5 -0.5 0 0.5 -1 -0.5 0 0.5 frequency/fd 1 . ... 14, , 11 1800 140 1600 160 1400 180 1200 200 pixel number 1000 220 800 240 600 260 400 280 200 300 120 140 160 180 200 220 pixel number 240 260 280 . ...