Point Source SNR Plots . In this section we present plots which may be used to rapidly estimate signal-to-noise ratio (SNR) for point sources with stellar spectra observed through popular WFPC2 filters. ... There are separate lines for PC1 (light lines) and the WFC (heavy lines), as well as for ATD-GAIN=7 (default, solid lines), and ATD-GAIN=15 (dashed lines). Dotted lines across the top of each plot indicate the onset of saturation. ... We now give a sample SNR calculation using these plots. ...

... When the source-detection algorithms has run omdetect will compute raw count-rates for each detected source. For point-sources (ie those sources having widths consistent with those of the point-spread function) the count-rates are obtained by aperture photometry. For binned and unbinned images the aperture is 6 and 12 pixels, respectively. ... Extrapolate (if necessary) the source count-rate to the 12 unbinned pixel aperture, using the point-spread function for the filter. ...

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. ...

[ CATS home ] [ Back to CATS list ] [ ftp ] . 2000ApJS..131..335Rutledge+ . Division of Physics, Mathematics and Astronomy MS 220-47, California Institute of Technology, Pasadena, CA 91107 rutledge@srl.caltech.edu, rb@astro.caltech.edu, prince@srl.caltech.edu

Next: *imcnts* - Find counts Up: Regions and Source Parameters Previous: *isoreg* - A region . ... xi xspatial # Load the spatial package xs imcnts # Run the task to count photons source image file : xdata$rp110590.qp # Input file , use complete filename source region descriptor: c 6930 9390 240 # Circle at 6930 9390 # with radius of 240 pixels background image file or cts/pixel: xdata$rp110590.qp # From the same file bkgd region descripton: a 6930 ...

... It included: gain, tsys, sefd, beam width, coma, 1st sidelobes, beam efficiency and pointing error. The data was taken at 1300, 1375, 1415, and 1500 Mhz with about 500 points at each frequency using 57 sources (most of the sources were not complete tracks across the dish). ... Fig 1 has all frequencies over plotted. Color separates the frequencies. ... Here color separates the sources. ... Fig 1 has the pointing error (great circle asecs) for za (top two plot) and az (bottom two plots). ...

... 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. ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Mopra radio telescope . ... Online Resources . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... H Emission From Point Sources In The Magellanic Clouds . ... Large numbers of the many types of emission-line object that are found in the Magellanic Clouds were first identified through H surveys of one kind or another...

... Flux density at 1 GHz (/Jy): 28 . ... Radio: Shell, brightest to the S. Optical: Filaments correspond well to the radio shell, brightest in SE. X-ray: Brightest to NW, with point source near centre. Point sources: Central, variable X-ray source, and nearby pulsar. ... Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS . ... ASCA observations of compact X-ray source. ... X-ray variability of central source. ... ATCA at 1.4 GHz (50''), including H I absorption to central source. ...

... 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. ...

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 . ...

... 0.14 PHA . ... IGR J00291+5934 . ... IGR J21247+5058 . ... IGR J21335+5105 . ... IGR J00370+6122 . ... IGR J23523+5844 . ... IGR J21178+5139 . ... IGR J21277+5656 . ... IGR J02095+5226 . ... IGR J21358+4729 . ... The map above is movable . ... Flux map Error map Significance Exposure . Flux and error maps are in mCrab units. ... INTEGRAL/IBIS 9-year Galactic Hard X-Ray Survey* , A , Volume 545, id.A27 { NASA ADS | ... 7-year Galactic Bulge map , 2009 . 9-year Galactic survey , 2012 . ...

The HyperNews Linux KHG Discussion Pages . Forum: The Linux Kernel Hackers' Guide . Re : Kernel source code ( Gabor J.Toth ) . Keywords: Linux kernel source code browsing WWW online . Date: Wed, 16 Oct 1996 22:03:05 GMT . From: Axel Boldt < boldt@math.ucsb.edu > . There's already an excellent online Linux kernel source code browser at http://sunsite.unc.edu/linux-source/ . I think we should have a pointer to it somewhere near the top of the KHG. Thanks, Axel .

... Appendix B. FTS Parser Example . ... This is a test_ parser .c #ifdef PG_MODULE_MAGIC PG_MODULE_MAGIC; #endif /* * types */ /* self-defined type */ typedef struct { char * buffer; /* text to parse */ int len; /* length of the text in buffer */ int pos ; /* position of the parser */ } ParserState ; /* copy-paste from wparser.h of tsearch2 */ typedef struct { int lexid; char *alias; char * descr ; } LexDescr; /* * prototypes */ PG_FUNCTION_INFO_V1(testprs_start); Datum testprs_start( ...

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 . ...

... a) As source material for the high-school or college curriculum, especially in physics. astronomy and their history. (b) As a source of supplemental projects by high school students or by undergraduates. (c) As material for independent studies, In particular by motivated students who seek to know more about space . ... Those wishing to look up specific topics are advised to use the index file, accessible from the end of any "Exploration" file. ... files not listed and at other resource material. ...

... a) As source material for the high-school or college curriculum, especially in physics. astronomy and their history. (b) As a source of supplemental projects by high school students or by undergraduates. (c) As material for independent studies, In particular by motivated students who seek to know more about space . ... Those wishing to look up specific topics are advised to use the index file, accessible from the end of any "Exploration" file. ... files not listed and at other resource material. ...

The Texas survey of radio sources covering -35.5{deg} < {delta} < 71.5{deg} at 365MHz . ... We present the Texas Survey of discrete radio sources between -35.5deg and 71.5deg declination (B1950), which was carried out at 365MHz with the Texas Interferometer during 1974-1983. ... The Texas Survey . ... The sources in the simpler model. ... Right Ascension 1950 . ... field separator . ... Some sources came from Version 6 of the Texas Survey ('TS6' in strp field) or Version 7 ('TS7' in strp field) . ...

Stellarium 0.12.3 . ... Renderer . FileљStructure . FileљList . FileљMembers . core . renderer . StelQGL1Renderer.hpp . ... 63 љ // Can't check the invariant here, as the renderer will be destroyed even . ... 81 љ return false ; . ... 85 љ invariant (); . 86 љ return true ; . ... 95 љ // GL1 doesn't support shaders. 96 љ return NULL; . ... 112 љ StelProjector * projector = NULL, . ... NULL) . ... 164 љ (NULL != projector ? ... 167 љ projector = (NULL != projector ? ...

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" . ...