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. ...

. XMM-Newton Science Analysis System . arfgen (arfgen-1.73.3) [???] . Meta Index / Home Page / Usage and Examples . Here is another example with an explicit source position - (1000,-1000) in DET coordinates - specified: . arfgen spectrumset=spectrum.pha . withsourcepos=true sourcecoords=det sourcex=1000 sourcey=-1000 . See also 7.4 for details of why the task needs the source position, and how to change it. XMM-Newton SOC/SSC -- 2007-11-15

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. ...

... 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. ...

... 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...

Next: Code II: Unknown Up: Image Restorations of High Previous: Construction of Algorithms . ... The positions of the designated point sources ( ) must be given as well as initial amplitudes for and . ... The integrated flux of the point sources ( ) plus that of the distributed emission ( ) is constrained to equal that of the observed image ( ). ... This is investigated in Fig. 1 where all emission derives from point sources but only one - the brightest - is designated as such. ...

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) . ...

Russian Academy of Sciences Pulkovo Observatory On systematic and stochastic errors of radio source position catalogues Zinovy Malkin Pulkovo Observatory and St. Petersburg State University malkin@gao.spb.ru JournИes 2013, Paris, France, September 2013 Topics to discuss The following topics related to the radio source position catalogues are considered: 1. ... A new approach to assess the external stochastic errors of radio source position catalogues has been presented. ...

... Up: Science Data Pipelines . ... We designed and developed a package which simulates extragalactic point source data within a given field of view and SIRTF band. ... The simulator is modular and extensible to enable multi-wavelength simulations, has been optimized by utilizing parallel processing capabilities, and will be used to test pipeline software. ... The extragalactic simulator is capable of generating large numbers of galaxies within a given patch of sky for SIRTF pipeline testing. ...

On 1 February 2002 this Mirror was upgraded from NVSSlist v2.10 to NVSSlist v2.17 . ... This form searches the source catalog produced by the NRAO/VLA Sky Survey (NVSS). ... Object name [optional] : . ... Search radius and verification halfwidth in arcseconds [Optional] : . ... Enter a list of positions to search: . ... The contents of the NVSS source catalog and the techniques used by NVSSlist to derive error estimates and other parameters are described here. ...

lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . FileљList . ... python . ... mov . checkSegment.py . ... 11 љ @param[in] pA position of starting point at time t = 0 . ... 13 љ @param[in] pB position of ending point at time t = dt . ... 16 љ @param[in] doPos log test position? . ... 20 љ @param[in] axisLim axis limits (a tcc.base.AxisLim) . ... 36 љ Even if you request that position limits be checked, some paths . ... 63 љ # check position limits; expand the limit to include the starting position . ...

This page holds the archived system performance data (the current data is on the system performance page) . ... Gain,Tsys,Sefd.. Coma,sidelobes, beam efficiency . Pointing errors. Az,za coverage . Hour of day when sources measured. 01sep01 thru 30jul02 (cooled receiver to - room temp amps installed) . ... Hour of day when sources measured (.ps) (.pdf) . ... Hour of day when sources measured. 21aug02 thru 01feb03 (horn focus change to reshimming of elevation rails, pointing model). ...

Observatories This page contains a incomplete list of links to various observatories throughout the world. Observatories are listed according to the types of telescopes they mostly operate, for example, optical or radio telescopes. ... Arcetri - Arcetri Astrophysical Observatory . ... Bologna - Bologna Astronomical Observatory . ... Grove Creek - Grove Creek Observatory . ... Radio Observatories . ... DRAO - Dominion Radio Astrophysical Observatory . ... Hat Creek - Hat Creek Radio Observatory . ...

Next: Sample Properties Up: Sample Identification Previous: Comments on Individual Sources . Previously known serendipitous sources were selected by cross-correlating WGACAT with a variety of optical and radio catalogs, including the Ver?n-Cetty & Ver?n (1996) and Hewitt & Burbidge (1993) quasar catalogs, the 1 Jy (Stickel et al. 1994) and S4 (Stickel & K?hr 1994) radio catalogs, and the BL Lac catalog of Padovani & Giommi (1995b). ... Details of these 97 objects are given in Table 6. ...

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. ...

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 . ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

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" . ...

... 2008 October 21 . A Dark Pulsar in CTA 1 . Credit: NASA , S. Pineault ( DRAO ) . Explanation: Where's the pulsar? Previously, the nebula CTA 1 showed an expanding supernova remnant , a jet , and a point source expected to be a pulsar -- a rotating neutron star producing pulses at radio energies. ... Now NASA's recently deployed Fermi Space Telescope has solved the mystery with some of its initial observations indicating that the point source is pulsing at gamma-ray energies . ...

Stellarium 0.12.3 . ... FileљStructure . FileљList . ... core . modules . Meteor.hpp . ... 46 љ Meteor ( const StelCore *, double v); . ... 64 љ Vec3f position; . 65 љ Vec4f color; . ... 67 љ : position( Vec3f (pos[0], pos[1], pos[2])), color(color) {} . 68 љ VERTEX_ATTRIBUTES( Vec3f Position , Vec4f Color); . ... 75 љ Vec3d obs; // observer position in meteor coord. system . ... 88 љ double xydistance; // distance in XY plane (orthogonal to meteor path) from observer to meteor . ...