... This algorithm is designed to pick up sources that have either extents much greater than that of the points-spread function or any other sources that were not picked up by the point-source detection algorithm. ... nESources - the total number of extended-sources detected so far . ... eLevelImage - a two-dimension array that stores the pixels assigned to the extended-sources- each pixel assigned to the source is set equal to the number assigned to the source. ... x - stores the pixel index i . ...

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• Extended-source Validation Function
• Point-source detection algorithm
• Extraction and correction of an X-ray light curve for a point-like source

... The spectroscopic follow-up program of the X-ray sources detected in the 942 ksec exposure of the Chandra Deep Field South has been carried out with the ESO Very Large Telescope ( VLT ) in the time frame April 2000-December 2001 [ESO no. ... Table 5, finding charts, 1&2D spectra can be found at the following URLs: . Table 5 ASCII . Table 5 HTML . Finding charts (click on the ID number in the table) . 1 2D spectra (click on the ID number in the table) ...

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• The Cross-correlations
• ESO - Newsletter December 2015

We investigate the luminous X-ray sources in the Lockman Hole (LH) and the extended Groth strip (EGS) detected at 24 нјm using the Multiband Imaging Photometer (MIPS) and also with the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope. We assemble optical/infrared spectral energy distributions (SEDs) for 45 X-ray/24 нјm sources in the EGS and LH. Only about one-quarter of the hard X-ray/24 нјm sources show pure type 1 active galactic nucleus (AGN) SEDs. ... ADS Citation Query . ...

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• Understanding Radio-selected Thermal Sources in M33: Ultraviolet, Optical,
• The Document Resources of Purple Mountain Observatory Library
• Far-infrared Source Counts at 70 and 160 Microns in Spitzer Deep Surveys

The final ChASeM33 source catalog . ... Back to Main Page . ... This is the final version of the ChASeM33 source catalog ("D" release) which contains 662 X-ray sources (70 are "possibly/confidently" extended). ... The ChASeM33 source catalog was created by using ACIS Extract, a software package written and maintained by Patrick Broos at Penn State University (USA). ... To learn about the adopted data reduction strategy and the results, we refer to The Final Source Caftalog paper from T llmann et al. ...

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• *imcnts* - Azimuthal profile of an extended source
• Source Selection
• Spectral Extraction of Extended Sources

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 April 19 . The GRB 110328A Symphony . ... Explanation: A symphony of planet-wide observations began abruptly on March 28 when the Earth-orbiting Swift satellite detected a burst of high-frequency gamma-rays from GRB 110328A. When the same source flared again after a 45 minute pause it was clear this event was not a typical gamma-ray burst . ...

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• APOD: April 7, 1997 - GRB970228: What's There?
• Sources
• APOD: 2006 April 12 - Binary Black Hole in 3C 75

... 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. ...

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• GRB follow-up team

... Gamma Ray Burst, Supernova Bump . ... During April and May, attention has been focused on the western evening sky, presenting its spectacle of bright planets and crescent moons shortly after sunset. Meanwhile, the Sun itself has not been just sinking quietly below the horizon. Tail Wags of Comet Ikeya Zhang . ... The star that appears to powers the nebula, although young and bright, does not seem hot enough to create some of the colors observed. ... At the Edge of the Helix Nebula . ...

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... 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. ...

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• Metagalaxy sector, archive 2015
• Detection of unique bright radio flare of X-ray binary
• Study of radio spectra and variability of GPS sources

... Download the code document. A new version will be released soon with a more detailed document. An X-ray source detection algorithm, optimally designed to detected faint extended sources, making use of Voronoi tessellation and Friend-of-Friend technique. ... This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License. Download sweepline.py . ... ROSAT 400d . ROSAT MACS . ROSAT WARPS . ROSAT REFLEX . ... XMM XCS . ...

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• Finding definitions in the source
• Arcetri H2O Maser catalog
• A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope

This source is hiding behind our Galaxy at a distance of ~18 Mpc, located at a galactic latitide of 0 degrees. ... As we look towards longer wavelengths, 60 micron, to try and penetrate the Galactic Plane, we still see confusion from galactic sources. ... If the image seems some what confusing that is because the MOST is a continuum radio telescope and when it looks in the direction of our Galaxy it detects radiation from sources within our Galaxy and from sources that may lie behind our Galaxy. ...

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• Duchamp Source Finder
• The ``HIPASS Bright Galaxy Catalog'' (version-4)
• HIPASS Bright Galaxy Catalog

... 113.2134Oppenheimer+ IX/18 EINSTEIN extended source survey (EXSS) (Oppenheimer+ 1997) ============================================================================ A survey of the EINSTEIN IPC Database for extended X-ray sources. ... 286-291 F6.2 arcsec dRA14 ?= ... 99.00 Declination difference between Abell and EXSS positions 301-304 A4 --- Typ14 The type of the corresponding source in the EINLINE database that is identified with the EXSS source (1) 308-313 F6.2 arcsec dRA15 ?= ...

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• VLA 404 compact sources
• A fast-scan extragalactic source survey at 4.755 GHz
• WSRT deep surveys

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

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• X-Ray WWW Server
• Database of Optical Properties -- Level: subpage

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... January 2006 resources . FROM THE January 2006 ISSUE . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• Resources for red-star fans | Astronomy.com
• December 2005 resources | Astronomy.com
• February 2006 resources | Astronomy.com

... The ROSAT Results Archive (RRA) is a publicly accessible collection of source lists, images, spectra, lightcurves and counting rates derived from pointed-phase observations of the ROSAT X-ray satellite observatory. ... This paper discusses the methods and tools used to screen ROSAT source results, and discusses ways in which the data will eventually be made accessible to the general astronomical community. ... Each field and source gets assigned a set of quality flags by these scripts: . ...

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• ADASS 2002 Conference Proceedings
• AstroWeb -- Internet Resources for Astronomers
• A New PROS Task for Calculating HRI Source Intensities or Upper Limits

We present optical, ultraviolet (UV) and extreme ultraviolet (EUV) results for a new active late-type dwarf star discovered by the Extreme Ultraviolet Explorer (EUVE). A large flare with an energy in excess of 1E35 erg and duration of ~1.1 days was detected in the EUVE Lex/B band (60--200AA). ... The `quiescent' EUV emission of the source is similar to the most active flare stars with the `quiescent' optical spectrum showing strong H alpha, Ca II H Mg II h emission and Li I 6707.8A absorption. ...

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• Armagh Observatory: Chris Winter [ lte-codes ]
• Photos & videos from the astronomy show of Friday 16 April 2010 | OASES Over us
• Atomic data for Stellar Atmospheres: lte_lines

... The source exhibits a mas-scale structure which, according to the USNO multi-epoch monitoring at 2.3 and 8.4 GHz over the period from 1994 July through 1998 April, undergoes considerable changes in the brightness distribution and positions of the major structural features. Our image is qualitatively consistent with the structural pattern of the source. ... We note a difference of ~90 in position angles of secondary components in our image and the 5 GHz VLBI image by Shen et al. 1998). ...

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... All the parameters provided in this database have been obtained using the the MIRIAD ( Sault et al. 1995 ) task MBSPECT . MBSPECT makes a spectrum of the velocity (or frequency) axis of a cube. The spectrum is beam-weighted, over the width specified, for the other image axes. ... Robust parameters are calculated by using an algorithm which minimises the mean absolute deviation of the flux-weighted velocities. mask= This specifies the x-axis ranges to be excluded from any continuum fit. ...

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• Chapter 29. NVIDIA Contact Info and Additional Resources
• Calibration Scans on Continuum Sources
• CIMA Source Catalogs

... Flux density at 1 GHz (Jy): 48 . ... Notes: Has been called G296.5+9.7 . ... Optical: Detected. X-ray: Incomplete shell, with central compact source. Point sources: Compact X-ray source detected within the remnant. ... Irvine & Irvine 1974, ApJ, 192, L111. ... ADS . ... EXOSAT of the west of the remnant, including the compact source. ... IPC and HRI observations, including compact source. ... Optical in vicinity of X-ray source. ... Radio, optical and X-tray observations of central source. ...

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• Galaxy Evolution: Radio sources and their environments
• Astrophysics Group 9C
• G332.4-0.4

Next: The Model Up: No Title Previous: Radiopulsars as Sources of . In this section, we study the evolution of stellar populations on a time-scale of 10 Myr for a starburst љ occurring under conditions similar to those in the Galactic Center (see Lipunov et al. (1995d)[ 126 ]). We estimate the expected number of X-ray transient љ sources (NS + MS star), super accreting BH, and BH + supergiant binaries, all as functions of time elapsed after the burst. ...

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• X-ray Luminosity Evolution
• X-ray Galactic Sources and Binary Radiopulsars as Probes of the Initial Mass
• Seminars

... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

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• Maybe This Is The Source... - an Astronomy Net UFO Forum Message
• Re: Re: Thanks For Making And And Of An Excellent Open Source Progra - an
• Re: Thanks For Making And And Of An Excellent Open Source Progra - an Astronomy