... rgsspectrum creates an OGIP-compliant spectrum of counts for a single RGS exposure. ... background-corrected source spectrum . ... Note that although the spatial selection region for the background spectrum is not source-specific, the energy selection region is source-specific, and for this reason the background spectrum is technically source-specific. ... The above description of the BACKSCAL column applies only to Spectroscopy mode data; in HTR mode this column has nothing to do with exposure. ...

Next: Order Definition Up: Echelle Reduction Method Previous: Retrieving demonstration and . ... That is the mapping between the space wavelength, spectral order and the space sample x , line y in the raw image. ... Sections and describe the solution of this mapping. The second step in the reduction, described in Section , is to estimate the image background. ... In the rest of this Section the algorithms used in each step of the reduction are described. ...

. This diagram illustrates how a background image may be repeated within the content and padding areas of a box. In this example, a background image is first centered within a box (established by the BODY element of the example). The box contains paragraphs of text, shown in gray to make them discrete. The image, a blue wavy line on a pale yellow background, is then repeated vertically, to the top and bottom of the BODY box. The effect is to create a wavy band down the center of the page. Return to image.

... The GHRS has the usual components of an astronomical spectrograph: entrance apertures, a collimator, dispersers, camera mirrors, and detectors. ... The collimator and camera mirrors are unexceptional and need no further description here (see ``The HST Focal Plane and the GHRS Apertures'' on page 73 for details). ... The first two first-order gratings, G140L and G140M, have their spectra imaged by mirror Cam-A onto detector D1, which is optimized for the shortest wavelengths. ...

... 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 . ...

... Telescopes . ... Diameter of circular antenna . ... Number of antenna elements . ... Geometrical area . ... Effective area of full circle . ... Wavelength range . ... Frequency range . ... 2 arcsec . ... Flux density limit . ... Absolute brightness temperature limit . 0.050 mK . ...

The Doppler shift is the effect of sound increasing or decreasing in pitch as an object moves towards or away from you. ... Light works the same way, except light is shifted to redder colours when an object is moving away, and to blue colours when an object is travelling towards us. ... Almost every object he observed had its light stretched to redder colours, indicating essentially everything in the Universe was moving away from us. ... So the Hubble constant tells us how old the Universe is. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Spectrum management . Spectrum management overview . ... CSIRO ATNF Data Archives . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ...

... Up: Telescope and Instrument Control Systems . ... 216, Astronomical Data Analysis Software and Systems IX, eds. N. Manset, C. Veillet, D. Crabtree (San Francisco: ASP), 271 . ... NASA Goddard Space Flight Center and AppNet, Inc. are developing AIML to command and control astronomical instruments. Our software architecture combines the platform-independent processing capabilities of Java with the power of XML. ... Instrument description is too tightly coupled with details of implementation. ...

... FTP access the basic models is here . ... Below, we put short descriptions of the used SED models for the photometric redshifts providing by the current server . ... The uniqueness of this model consists in expanding to the near IR (NIR) of Rocca-Volmerange and Guiderdoni's (1988) atlas of synthetic spectra with a revised stellar library, which includes parameters of cool stars. ... Homepage of the GISSEL model). ... Another model used earlier is the model of synthetic spectra of Poggianti (1997). ...

... This method is based on putting space modules, vehicles and EVA-suit donned cosmonauts in the swimming pool under conditions of neutral buoyancy, indifferent equilibrium and unsupported state. ... You can also dive into the swimming pool with the SCUBA equipment in order to examine the mock-ups of space stations and vehicles and pass a course of rehabilitation in a hyperbaric oxygenation complex. ... Services / Hydrospace: General description Technical description "Orlan" suit Photo gallery Price . ...

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

ESO Phase 3 Data Release Description Please start from this template when preparing the documentation for your ESO Phase 3 data release. ... Finally, the release description will be published as submitted - without further editing by ESO - to support the user community in utilizing the data. ... Please indicate if this is a catalogue data release. ... Data Reduction and Calibration Please address the following questions for scientific catalogue data, particularly in case of source catalogues: . ...

Next: Error Determination Up: *qpspec* - Extraction of Previous: Spectral Extraction of Extended . Charged particles can be removed from the source and background spectra using the master veto (MV) rate. ... For example, if MV rate = 100, the following command will remove the charged particles in the background and source spectra before determining the net spectrum. xs > qpspec vign_corr=yes avg_mvr=100 . ...

... Sharing the Universe videos are produced by the Astronomical Society of the Pacific (ASP) from research conducted by the Institute for Learning Innovation, the ASP, and from astronomy clubs like yours. www.astrosociety.org/SharingTheUniverse . The Sharing the Universe project is funded by the National Science Foundation and is supported by the Division of Research on Learning in Formal and Informal Settings (DRL) of the National Science Foundation under Grant Number DRL 0638873. ...

Detector of hydrogen isotopes (ISIV) . ... Measurements of hydrogen isotopes content in surface layer of a solid (provided that the content is more than 0.01 %). ... Content of hydrogen isotopes of a sample is measured by nondestructive technique of direct measurements in the surface layer. ... Measurable hydrogen isotopes content   ~0.01 wt. ... Area surface of sample                                         ~10 cm 2 . ... G. Dolnikov +7(495)333-25-66, ggd@iki.rssi.ru . ...

... The procedure of radiometer signal integration can be considered as a sort of reducing dimension of the initial sampling space, where the samples are the result of analog-to-digital conversion. ... The probability distribution of the signal and spikes is completely known. ... The quality of the considered algorithm could be also illustrated by Figure 2 . ... One could see the considered adaptive algorithm is preferable even by low degree of compression, because all spikes have been depressed. ...

The following papers summarize the characterization and technical performance of IBIS : . ... Characterization of Fabry-Perot interferometers and multi-etalon transmission profiles. ... Righini, A., Cavallini, F., Reardon, K. P., 2010, Astronomy and Astrophysics , 515 , A85, . ... The filter wheel is located between the two interferometers. ... The interferometers can be rapidly tuned, simultaneously, so to allow sequential scanning of the spectral lines of interest (see movie in IBIS Intro ). ...

Stellarium 0.12.3 . ... Classes . ... Renderer . FileљStructure . ... StelViewportEffect Class Reference abstract . Allow to apply visual effects on the whole Stellarium viewport. More... #include < StelViewportEffect.hpp > . virtual QStringљ . ... drawToViewport (class StelRenderer *renderer)=0 . ... distortXY (float &x, float &y) const . ... Definition at line 35 of file StelViewportEffect.hpp . virtual void StelViewportEffect::distortXY . ... core/ StelViewportEffect.hpp . ...

... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...