Next: Future Work Up: CCD Scientific Performance Previous: Modes of Operation . ... However, the first experiments with Co-60 irradiation showed loss of charge transfer performance at doses of 10krads [Lumb and Holland 1988b]. ... These studies showed that the charge transfer degradation was a more severe problem than conventional integrated circuit damage mechanisms. ... Another manifestation of radiation damage is that of dark current spike generation. ...

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• XMM Radiation Environment Workshop

Astronomy Picture of the Day . ... The Sudbury Neutrino Observatory Institute Explanation: The Sudbury Neutrino Observatory (SNO) has been detecting so few neutrinos from the Sun that the Standard Model of fundamental particles in the universe may have to be revised. Pictured above is the SNO as it was being built. ... The most popular model for fundamental particles , known as the Standard Model , did not predict such schizophrenic neutrinos . ... The Sudbury Neutrino Detector . ...

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• Астронет > Sudbury Indicates Nonstandard Particle Model
• Jagged Shadows May Indicate Saturn Ring Particles
• Астронет > Jagged Shadows May Indicate Saturn Ring Particles

We cannot observe the way the distant universe accelerates cosmic rays or produces energetic photons, but acceleration processes also occur on our Sun , though on a much more moderate scale. ... That is why such events are often missed by cosmic ray detectors near the equator, where the lowest energies are excluded by the Earth's magnetic field. The best detectors for observing solar particles are therefore those sensitive to the lowest energies of the cosmic radiation. ...

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• Space Weather
• The Solar Wind
• "Exploration" as a Classroom Resource

... 2001 July 10 . Sudbury Indicates Nonstandard Particle Model . ... The Sudbury Neutrino Observatory Institute . Explanation: The Sudbury Neutrino Observatory (SNO) has been detecting so few neutrinos from the Sun that the Standard Model of fundamental particles in the universe may have to be revised. Pictured above is the SNO as it was being built. ... The most popular model for fundamental particles , known as the Standard Model , did not predict such schizophrenic neutrinos . ...

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• APOD: 2009 April 15 - Jagged Shadows May Indicate Saturn Ring Particles
• tickadj - set time-related kernel variables
• Astronomical Names

... As seen from the alpha particle testing, the spectrometry performance of the CPS32 is limited by peripheral hits and pixel-to-pixel variability, issues unrelated to radiation effects. ... First, it is important to note that, up to the 10 krad dose tested, the CPS32 remained entirely functional. The dominant total dose effect was an increase in the 25єC dark current of 0.58 nA/cm 2 /krad. ... Thus, for imaging, the dark current FPN is likely to be the main performance limitation. ...

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• CMOS tutorial-design
• Electron bombarded sensors-reliability
• CMOS tutorial-results

... Normally a single integration on a target results in a single 256x256 image at the termination of the exposure. ... In this mode of operation, known as Multiple-Accumulate (MULTIACCUM), each intermediate readout can only consist of a single readout. ... The choice of the times during the integration in which the observer can create these reads is very flexible, for example they might be linearly spaced or logarithmically spaced. ...

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• Special Trouble or Action Header Keywords
• Bright Object Artifacts
• ACS Data Handbook

... Aurora from Space . ... Magnetic Storms . ... Solar fast Particles . ... Currently more than 200 communication satellites circle the Earth in synchronous orbit . ... Another effect of magnetic storms (and to lesser extent, of substorms) is a greater intensity of the electric currents circulating between Earth and distant space. ... One spacecraft would orbit near Earth, the other would be stationed elsewhere in the Earth's orbit around the Sun, capturing a sideways view of solar eruptions. ...

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• Solar Energetic Particles
• The Motion of Magnetically Trapped Particles -- History
• The Solar Wind

Research Activities . Integrated superconducting submm receivers and spectrometers. Technology for fabrication of superconducting integrated circuits based on high quality submicron Nb and NbN tunnel junctions with high current density. Development, study and optimization of the superconducting phase locked Local Oscillator for integrated spectrometer. ... Development of the superconducting elements for operation at frequencies up to 1 THz. ... Activities | ...

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• Lab234 - Development, study and optimization of the superconducting phase
• Lab234 - Superconducting Integrated Submm Spectrometer for Laboratory
• Lab234 - Technology for fabrication of superconducting integrated circuits

ION AND ELECTRON ENERGY DETECTOR PAN-2 . ... The energy and angular distributions of charged particles can bring further information on the nature and spatial scales of magnetospheres processes. ... It permits the fast measurements of energy and angular parameters of charged particles in the range 40eV-40keV. ... The sensor unit is an electron electrostatic, axially symmetrical, toroidal analyzer. ... The energy range for both types of charged particles must stepped according to the logarithmic scale. ...

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... Contamination on optical surfaces degrades the throughput of an optical system. ... Contamination is particularly pernicious on the unprotected aluminum that is commonly used on the large first-surface mirrors of reflecting telescopes. ... During that period, the covers of their protective cases is opened whenever the 3.5-m telescope primary mirror cover is opened for nighttime observing. ... CO2 clean exposed mirrors in SS case. ... Light scattering measurements performed on cleaned mirrors. ...

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• Untitled Document
• Emergency.html
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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... September Perseid meteors captured by the . ... Its occurrence provides astronomers with interesting new data about the hidden trails of meteoroids тАФ small bodies ranging in size from fine dust particles to objects of marble-size and larger тАФ in the solar system and their supposed sources: comets and asteroids passing through the inner solar system. ... The particular comet that created the September Perseids is unknown...

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• J.G. Doyle, Research Astronomer
• Irregular Satellite Research
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Wave-Particle Duality of Light. click here to see a wave experiment . ... In the wave theory, greater light intensity simply means more photons. Each photon ejects electrons in the same way, so more intensity means more electrons. Threshold frequency and electron K.E. should not be affected by intensity. ... Light frequencies below the threshold eject no electrons, no matter how intense the light. Light frequencies above the threshold eject electrons, no matter how low the intensity. ...

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• U of O High Energy Physics Seminars
• ELECTRICITY GENERATION
• U of O Experimental High Energy Physics

Subject: ESO VLTI calibrator program Ladies and gentlemen-- With the coming of the ATs, and the slow movement of MIDI and AMBER into routine operation I think the time has come to improve the general level of interferometric calibrators at the VLTI and their accessibility to users. ... Define database formats to contain information on each calibrator. ... Observing programs be set up with MIDI, AMBER, and possibly VISIR and ISAAC to establish a consistent set of spectrophotometric and visibility data. ...

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• Operations with DFOS: daily cronjobs
• QC Procedure: DFOS operations under VNC
• ESO - Instrumentation Development

Next: Polarization efficiency: size/shape/orientation effects Up: Optical properties of cosmic Previous: The 2175? feature . To model the interstellar polarization one needs to calculate the forward-transmitted radiation for an ensemble of non-spherical aligned dust grains. ... Let non-polarized stellar radiation passes through a dusty cloud with a homogeneous magnetic field. ... The angle between the line of sight and the magnetic field is ( ). ... where the angle is connected with and ( ). ...

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• Linear polarization: wavelength dependence
• Wavelength dependence
• Database of Optical Properties -- Level: subsubpage

... One of these factors is how the client application uses VDPAU; i.e. the number of surfaces allocated for buffering, order of operations, etc. ... At a bare minimum, the application must allocate one video surface for each reference frame that the stream can use (2 for MPEG or VC-1, a variable stream-dependent number for H.264) plus one surface for the picture currently being decoded. However, if this minimum number of surfaces is used, performance may be poor. ... Performance Levels . ...

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• PRCZ table
• Nuclear and Particle Physicists visit the Arecibo Observatory National
• Spectral-Line Observing

ATNF ATUC MEMORANDUM To: ATUC From: Tasso Tzioumis Date: 25 November 2005 Subject: VLBI report - LBA Operations & eVLBI 1) Operations In the past 6 months there was only 1 VLBI session, 1-6 November 2005. ... The next VLBI observing session is scheduled for 9-17 March 2006. ... Correlation will be done on the Swinburne software correlator. ... 2) VLBI tests a) Real-time fringe testing Real-time fringe testing using the disk systems has now been implemented at all antennas. ...

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• ATCA_report
• Parkes_report
• Parkesreport

This image shows where NASA's Curiosity rover aimed two different instruments to study a rock known as "Jake Matijevic." The red dots are where the Chemistry and Camera (ChemCam) instrument zapped it with its laser September 21, 2012, and September24, 2012, which were the 45th and 48th sol, or martian day of operations. The circular black and white images were taken by ChemCam to look for the pits produced by the laser. ...

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• Radiation measured by Curiosity on voyage to Mars has implications for future
• Data from NASA's Voyager 1 point to interstellar future | Astronomy.com
• Mission discovers particle accelerator in heart of Van Allen radiation belts |

. Next: To display a particular Up: *display, xdisplay, xexamine* - Previous: To view a section . tv> display ``xdata$rp110590.qp[block=4][1673:1800,2273:2400]'' . This is a tricky operation. The order of the instructions is critical. The image must first be compressed, then the section specified using the coordinates of the compressed image (logical coordinates). The above will display a 128 128 section. rsdc@cfa.harvard.edu . 1998-06-10

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• Charged Particle Subtraction
• The AstroStat Slog particle filter
• The AstroStat Slog Blog Archive [ArXiv] Particle Physics

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

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• Gemini NIFS May 2002 First Cool Down.
• COALA - Computational Astrophysics Laboratory
• Dougal Mackey - Research

Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

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• Operating the TNG Data Handling and Archiving
• An Integrated Procedure for Tree N-body Simulations: FLY and AstroMD
• On the Need for Input Data Control in Pipeline Reductions