... Global WWW Starting Point and Compilations . ... HTML Manuals and Tutorials . ... ESA/Estec/SAI Home Page . ... Centre de Donn es astronomique de Strasbourg (CDS) Home Page. ... Bibliographical Engine ( xxx forms) - Italian mirror . ... The NASA Home page. An Web Resource Collection by Masters Degree Online . ... The local TCSH . ... The Web Anti-Spam page. ... Apple Italian Home Page . ... Walnut Creek CDRom Home Page and the Italian Mirror . ... A good hotlist of HTML resources around the Web. ...

... So far the discussion has assumed that the `source' time series is a record of events from a point-like source of x-rays. ... The mode is accessed via the parameters srcweightstyle and srcweightsnode0 . A typical call of lccorr in this non-point-source mode might be as follows: . ... Note that events lost to vignetting, to absorption by the filter or to quantum inefficiency cannot be estimated in this mode: only time-dependent corrections can be made. ...

... Home . ... Data . ... WFPC2 Home . ... Instrument . Instrument Home . ... LRF Data . ... Instrument Handbook . ... This tool allows users of WFPC2 to estimate the effects of CTE losses on point sources. ... This is the version used in the current WFPC2 Instrument Handbook. ... WFPC2 ISR-0109: The WFPC2 Photometric CTE Monitor . WFPC2 ISR-0004: How CTE Affects Extended Sources . WFPC2 ISR-0003: Update on Charge Trapping and CTE Residual Images in WFPC2 . ... The WFPC2 Instrument Handbook . ...

... On 04jan01 through 08jan01 a number of calibrator sources were tracked using the sband narrow receiver at 2380 Mhz and the standard calibration pattern (4 cross scans at 45 degrees to one another). ... Figure 1 shows the point source gain in K/Jy versus azimuth angle. ... Figure 2 shows the same point source gain in K/Jy versus zenith angle with the bottom plot coming from the sep00 run. ... The ratio of the beam efficiency to the point source gain is independent of the source flux. ...

Next: A box, to include Up: To produce a region Previous: To produce a region . select cursor and circle . When in the image window, the mouse now has a box shape with an arrow at the upper left corner. The mouse buttons act as follows: . LEFT - to move the center of the circle at the position of the arrow point. ... RIGHT - idle. center the circle at the point source by positioning the arrow point and clicking on the LEFT mouse button. A circle will appear at the arrow position. ...

The NICFPS:Dither:Point Source Random script allows you to take a sequence of exposures in a square pattern plus a point in the middle. This pattern is typically used for point sources. ... Any dither point may be omitted by unchecking its checkbox before running the script. ... Dither pattern without randomization . ... Randomization 1. ... Dither pattern with randomization Thanks to Corey Wood for the first implementation of randomization and for the images used in the documentation. ...

... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

... Astrophysics Group . ... AMI Local Resources . ... AMI Day . ... AMI Small Array Webcam . AMI Large Array Webcam . Small Array Status , Monitor data ? ... Large Array Status , Monitor data ? ... Phase-switch-related electronics appear in the Control Electronics page below) . ... Technical meeting minutes (files listed as YYMMDD) . Science meeting minutes . Data reduction meeting minutes (files listed as YYMMDD) . ... Archive Minutes (2000-2005): Technical meeting minutes | ...

... Light sources: POV-Ray works with point sources of light. ... A real star consists of a spherical light source (the photosphere where the continuum is formed) superimposed by a scattering layer (an atmosphere) responsible for phenomena such as limb darkening and absorption lines. ... For example, in order for the central light source to illuminate the surface, the star must be transparent. ... The POVRay source for creating the white dwarf binary merger movie is given for demonstration purposes. ...

Next: Catalog Construction Up: Observations and Analysis Previous: Source Detections . ... It was assumed that the highest signal gives the most likely position of the source. ... Comparing the summed map with the maps from the individual energy ranges, the one which produced the smallest error box was chosen to represent the source position, as long as was greater than 4, a level chosen to reflect a reasonable degree of confidence in the detection. ...

... CentralProcessor 0.11 documentation . ... Only continuum source-finding is done at this point - spectral-line source-finding will be added in the future. The source-finding applies a spatially-varying signal-to-noise threshold, and fits 2D Gaussians to detected islands to create a component catalogue. At this point, only a limited set of Selavy?s possible parameters are made available through these scripts. ... nsubx ( Selavy Basics ) . ... User Parameters - Mosaicking Continuum images . ...

Links and Resources for Energy and the Environment . The world is finally becoming globally aware that exponential resource usage in combination with finite reserves is a recipe that ensures our great grandchildren won't be born. ... National Environmental Information Service . ... Electronic Energy Journal . ... Sustainable Development Dimensions , including sections on Environmental information , Environmental policy, planning and management and Energy for development . ... Acid Rain Resource . ...

. Handbook of Space Astronomy and Astrophysics .

The Astronomy Net . Articles | AstroGuide | ... Forums . ... H ere you can find resouces to help understand perhaps the grandest of all sciences. ... Upcoming Sky Events . ... This site includes lists of manufacturers, vendors, software, etc. organized in the AstroGuide to help when you are looking to purchase your tools. ... Astronomy Articles . ... Are you interested in writing an article for the Astronomy Net? ... www.astronomy.net . ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... LABORATORY OF RADIO ASTRONOMICAL OBSERVATIONS . Radio sources identification is one of the most important tasks of the current radio astrophysics. ... Optical idetification. ... Optical identifications of subsample of steep spectra radio sources from RC catalog using 6m SAO telescope of SAO RAS: optical observations. ... Astronomy Reports. ... Identification of radio sources with data of various radio catalogs allows one to construct continual spectrum of the object and its radio structure. ...

SAI 175 anniversary . ... Moscow University . Search for in SAI Moscow University Search for in Russian astronomical resources . ... SAI Astronomical Databases . ... Browse SAI Software archive(ftp.sai.msu.su) . ASTRONET.RU - Russian Astronomical Network (available in translit also) . ... SAI Supernovae Research Group . ... Department of the Galaxy and Variable Stars (in Russian) . Sternberg Astronomical Institute Seminars . ... All-Russian Astronomical Olympiad (in Russian) . ...

Comment on J2246-1206 . In contrast to the jet pointing to the NE in our image, the 5 GHz VLBI image of Shen et al. (1998) shows no indication of extended emission above the 20 mJy/beam level. Hong et al. (1999) find a jet component to the SE and identify that with a "superluminal" component possibly ejected in 1992. A 15 GHz image from the USNO database, taken nearly at the same epoch as the image of Hong et al. (1999) does not show any component at this position angle. ...

... start : q3c . ... SAI VO Projects . ... Help on Wiki search . ... Ask your administrator if you think this is wrong. code dropdb q3ctest createdb q3ctest psql q3ctest /usr/local/pgsql/share/contrib/ q3c .sql psql q3ctest /usr/local/pgsql/share/contrib/pg_sphere.sql /code code \timing on DROP TABLE running_ q3c ; DROP TABLE running_pgsphere; CREATE TABLE running_ q3c (id INT, ra FLOAT, dec FLOAT); CREATE INDEX running_ q3c _idx ON running_ q3c ( ... SAI VO | ... SAI MSU ...

home education > resources . SEARCH ASP SITE: Match ALL words Match ANY word . ... Resources . ... Astronomy Education Bibliography . ... Astronomical Pseudo-Science . ... Black Holes: An Introductory Resource List . ... Astronomy . ... Space Science Education Resource Directory . ... http://www.aas.org/education/ancientuniverse.html . National Center for Science Education: Best web site for keeping up with issues in this area, with many articles, resources, and links. http://www.ncseweb.org . ...

spaceweb@oulu.fi - last update: 5 January 1999, 1500 UT (RR) . Geomagnetic pulsations, i.e., ultra-low-frequency (ULF) waves cover roughly the frequency range from 1 mHz to 1 Hz , i.e., from the lowest the magnetospheric cavity can support up to the various ion gyrofrequencies . ... Pulsation classes . ... Pulsations are studied with in situ observations in space of both magnetic and electric fields, and with ground-based magnetometers . ... correlation with IMF/solar wind parameters . ...