ACS Insturment Handbook for Cycle 24 . ... Advanced Camera for Surveys Instrument Handbook for Cycle 24 > Chapter 10: Imaging Reference Material > 10.2 Using the Information in this Chapter . ... 10.2.2 Signal-to-Noise . 10.2.3 Point Spread Functions . ... This chapter contains plots of throughputs for each imaging mode, in Section 10.3.1 . Section 9.2 explains how to use these throughputs to calculate expected count rates from your source. ... from the source flux, using the relation , . ...

... region (region-6.2.2) [xmmsas_20030110_1802-5.4.1] . ... The region task will automatically determine the optimal source and background extraction regions for a detected source in an XMM observation. ... The regions are defined in sky coordinates. region will attempt to maximise the area of the extraction region for each source, whilst ensuring that the extraction regions of neighbouring sources do not overlap, and that the background extraction region for a given source excludes neighbouring...

This source is hiding behind our Galaxy at a distance of ~18 Mpc, located at a galactic latitide of 0 degrees. ... As we look towards longer wavelengths, 60 micron, to try and penetrate the Galactic Plane, we still see confusion from galactic sources. ... If the image seems some what confusing that is because the MOST is a continuum radio telescope and when it looks in the direction of our Galaxy it detects radiation from sources within our Galaxy and from sources that may lie behind our Galaxy. ...

SKA-3 instrument consists of two energy-angle ( EA ) electrostatic analyzers and two energy-mass ( EM ) time-of-flight analyzers. ... Here you can find more details about SKA-3 instrumentation set. ... Case 218 . ... satellite's trajectory in geomagnetic frame ( blue coloured), UFSIPS scan location and observation moment ( red coloured), interval of the SKA-3 observations ( green coloured) . ... a view of the Nothern polar region at the moment of UFSIPS observations, the scan location is red coloured. ...

Fiber-Optic-Taper CCD Cameras for X-ray Crystallography Application #1: Percent of X-ray photons detected Wide Angle Scattering of Monochromatic X-Rays From Complex Crystals such as Proteins. ... 1 10 Photon energy keV 100 Detection gain with a 2.3:1 taper ratio. ... The phosphor, taper, and CCD are all enclosed in a vacuum chamber, 80 Shuttering and Synchronization Electrical timing signals are available from the camera controller, for synchronization with a customer provided X-ray shutter. ...

... These sources are much more likely to be gravitationally lensed by intervening galaxies as compared with sources discovered in surveys in other wavebands. ... The effect of lensing by clusters is then discussed briefly. This is expected to increase the source confusion noise in a Planck survey in the directions of clusters, and could provide information about galaxies with flux densities that are too faint to be detected directly by Planck . ... 2 The properties of galaxy--galaxy lensing . ...

. This plot shows the locations of 150 blazars (green dots) used in the EBL study. The background map shows the entire sky and was constructed from four years of gamma-rays with energies above 10 billion electron volts (GeV) detected by Fermi. The plane of our Milky Way Galaxy runs along the middle of the plot. The Fermi LAT instrument is the first to detect more than 500 sources in this energy range. // Credit: NASA/DOE/Fermi LAT Collaboration

... Meade Instruments Corporation . ... How to Calculate Power . How to Calculate Power: The magnification, or power, at which a telescope is operating is a function of the focal length of the telescope's main (objective) lens (or primary mirror) and the focal length of the eyepiece employed. ... Example: The Meade DS-2070AT telescope has an objective lens focal length of 700mm; when this telescope is used with a 25mm eyepiece, a power of 700/25 = 28 power (written as "28x") results. ... about meade | ...

... This is possible at modest cost due to the low moments of inertia of the telescope and enclosure. ... This same performance will be achieved in higher winds when the telescope enclosure is facing away from the wind, or by using wind screens. ... The telescope system (MILT) will be remotely operable with an on-site operator's assistance by an astronomer located at one of the ARC member institutions. ... Mean Wind Speed . ... Offsets > 10 deg: 1 arc sec rms max . ... 5 sec max, tracking to tracking . ...

... HOME . ... Richard J. Edgar, Project Scientist . DXS, the Diffuse X-ray Spectrometer instruments were flown on the STS-54 mission of the Space Shuttle Endeavour in January of 1993. ... A Summary of the First Results from the Diffuse X-ray Spectrometer Experiment . ... In January of 1993 the Diffuse X-ray Spectrometer (DXS) instruments flew on the STS-54 mission of the Space Shuttle Endeavour. ... The DXS x-ray spectrum from the diffuse background in the constellations of Puppis and Auriga. ...

... 314, 2004 F. Ochsenbein, M. Al len, and D. Egret, eds. Efficient data mining in the X-ray sky background John Cunniffe, Evert J.A. Meurs Dunsink Observatory, Castleknock, Dublin 15, Ireland Aaron Golden IT Centre, NUI Galway, University Road, Galway, Ireland Abstract. Abstract: The calculation of flux upper limits in the sourcefree ("background") regions of photon-limited images is complicated by instrumental and statistical modeling and requires non-trivial computational effort. ... 2004). ...