... 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 . ...