Gamma Rays from Galactic Center Dark Matter . ... Fermi Space Telescope , NASA Explanation: What is creating the gamma rays at the center of our Galaxy? Excitement is building that one answer is elusive dark matter . Over the past few years the orbiting Fermi Gamma-ray Space Telescope has been imaging our Galaxy's center in gamma-rays . Repeated detailed analyses indicate that the region surrounding the Galactic center seems too bright to be accounted by known gamma-ray sources . ...

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• Астронет > Gamma Rays from Galactic Center Dark Matter
• The Milky Way's Gamma-Ray Halo
• The Solar Wind Emerges

... This section will deal with obtaining photons within specified regions of an image. Available regions are: Annulus Box Circle Ellipse Field -- entire field Irregular region based on intensity of map... i.e. region defined by contour levels. ... The imcnts task in the xray-spatial package sums the source and background counts in specified regions, and subtracts one from the other properly normalized. ... imcnts* - Find counts in an extended region, after removing an embedded point source . ...

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• ChaMPlane data_archive_.html
• Source Selection
• Region Names and Colors

... 2014 March 10 . Gamma Rays from Galactic Center Dark Matter? Image Credit: T. Daylan et al. ... Explanation: What is creating the gamma rays at the center of our Galaxy? ... Over the past few years the orbiting Fermi Gamma-ray Space Telescope has been imaging our Galaxy's center in gamma-rays . ... A raw image of the Galactic Center region in gamma-rays is shown above on the left, while the image on the right has all known sources subtracted -- leaving an unexpected excess. ... About APOD | ...

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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. ...

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• THE MOLONGLO RADIO SOURCE CATALOGUE 4: MC4
• Group IAG
• The Parkes 6 cm Galactic Survey

... OGIP spectrum for selected source region . OGIP spectrum for selected background region . ... The primary input to especget is an image data set and two spatial selection expressions which need to mark an extraction region around a point source and a source-free background region. ... All regions will be deleted from the image - new initial selections for source and background regions must be made In the first and second case especget is eventually invoked with the appropriate input. ...

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• The contour method of calculating source region shape

... Classes . ... Regions . ... 00001 //# WCLELMask.h: Class to define a mask as a LEL expression 00002 //# Copyright (C) 2000,2003 00003 //# Associated Universities, Inc. ... /# National Radio Astronomy Observatory 00023 //# 520 Edgemont Road 00024 //# Charlottesville, VA 22903-2475 USA 00025 //# $Id: WCLELMask.h 20615 2009-06-09 02:16:01Z Malte.Marquarding $ 00026 00027 00028 00029 #ifndef IMAGES _ WCLELMASK _H 00030 #define IMAGES _ WCLELMASK _H 00031 00032 //# Includes 00033 #include images /...

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• casacore: images/Regions/WCExtension.h Source File
• casacore: lattices/Lattices/LELRegion.h Source File
• casacore: images/Regions.h Source File

... Astrophysics Group . ... AMI Publications . ... AMI Consortium: Hurley-Walker N. et al., 2011, preprint (arXiv:1103.0947) . ... AMI Consortium: Olamaie M. et al., 2010, preprint (arXiv:1012.4996) . ... AMI Consortium: Shimwell T. W. et al., 2010, preprint (arXiv:1012.4441) . ... AMI Consortium: Davies et al., 2010, preprint (arXiv:1012.3659) . ... AMI Consortium: Franzen et al., 2010, preprint (arXiv:1012.3711) . ... AMI Consortium: Rodriguez-Gonzalvez C. et al., 2010, preprint (arXiv:1011.0325) . ...

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• The 7C(G) survey
• Astrophysics Group Variability studies
• Astrophysics Group 10C

home resources > books . SEARCH ASP SITE: Match ALL words Match ANY word . ... Buy The Black Hole at the Center of our Galaxy at Amazon.com! Reviewed by Terrell Kent Holmes . In 1974 astronomers discovered a bright radio source at the center of the Milky Way Galaxy, in the direction of the constellation Sagittarius. It was an unknown quantity then, but astronomers now know that the object is a supermassive black hole causing a maelstrom of activity at the galactic center. ...

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• ASP: Astronomical Pseudo-Science: A Skeptic's Resource List
• ASP: Resource Center
• ASP: Black Holes: An Introductory Resource List

... Pre-university education . ... The NEICON consortium provides free test access to three platforms of electronic resources of McGraw-Hill Education company: . ... ACCESS ENGINEERING (www.accessengineeringlibrary.com ) is the largest platform in the area of technology and engineering science. It contains over 250 key items as well as interactive graphs, tables and video materials. ... ACCESS MEDICINE (www.accessmedicine.com) is the basic medicinal platform of McGraw-Hill Education. ...

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... The flux distributions of spectrophotometric standard stars were initially derived from the comparison of stars to laboratory sources of known flux but are now mostly based on calculated model atmospheres. ... Several historical lab-based flux calibrations are reviewed; and the SEDs of stars in the major online astronomical databases are compared to the CALSPEC reference standard spectrophotometry. ... ADS Citation Query . citations = 14 . citations vs. year [year,citations] . ...

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• A detailed study of the radio-FIR correlation in NGC 6946 with
• The Document Resources of Purple Mountain Observatory Library
• A Spitzer Space Telescope Far-infrared Spectral Atlas of Compact Sources in the

... Clean . ... Flux Sign Expo . ... The map above is movable . The image is shown in significance with a squared root color map ranging from 0 to 25. ... Original shows mosaics with all data available. Flux map Error map Significance Exposure . Flux and error maps are in mCrab units. ... Exposure maps are in ksec. 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 . ... Exposure . ...

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1000 of these sources, however, remains a mystery; these are the so-called unassociated gamma-ray sources, with no known astrophysical counterpart at any other wavelength. While many LAT unassociated sources likely belong to known classes of objects (e.g. pulsars), a more exotic origin for some of these sources is also possible (e.g. dark matter annihilation). ... These results will aid further studies and follow-up observations of LAT unassociated sources. ...

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