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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• Primary Catalog
• The Parkes 6 cm Galactic Survey
• Discussion

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Description: large, diffuse, X-ray and radio brighter in northern half . Radio . ... Radio Images Page . ... Exposure uf . ... Exposure uf Exposure time of unfiltered event file . Exposure f Exposure time of filtered event file . ... Event 2 FITS File . ... AUX file . ... 0.3 - 10.0 . ... see fit detail page for more about the fit. see chandra spectrum page for region used. ... True Color Image . ... Radio Images . ...

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• Chandra Images for G008.3+00.1
• Chandra Images for G004.5+06.8
• Chandra Images for G007.5-01.7

... region (region-7.9.3) [xmmsas_20080701_1801-8.0.0] . ... At times it may be desirable to filter the source list before calculating regions. An example of such a case is if the list contains many rows for the same source position (as do eg the standard XMM source-list products). There is usually not much point in constructing more than one region for the same source position, so in this case it would be desirable to filter out all the excess rows before constructing regions. ...

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• Parameters
• Errors

... Miriad has a couple of tasks available for finding positions of sources (see also cgcurs in Chapter 17 ). ... It fits a 2-D parabola to the image intensities in a 3 by 3 pixel box centred on the brightest pixel in a specified region and reports the fitted location and intensity. ... Input image . ... The quality of your fit can improve significantly by selecting a snug region, and/or using the clip keyword to keep pixel values with little signal (e.g. sidelobes and noise) out of the fitting process....

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• News Results
• casacore: images/Regions/WCUnion.h Source File
• casacore: images/Regions/WCDifference.h Source File

... 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. ...

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• An Extragalactic Point Source Simulator for SIRTF Pipeline Testing
• ADASS 2002 Conference Proceedings
• QPSIM: An IRAF/PROS Tool for Source Simulation

Figures ix Figure 1.1: WFPC2 Field­of­View Projected on the Sky .. ... CCD Row .. ... 126 Figure 6.3: Sample Results from WFPC2 ETC ­ Point Source .. ... 127 Figure 6.5: Point Source + Stellar Background Fill­out Form for WFPC2 ETC .. 130 Figure 6.6: Sample Output from WFPC2 ETC ­ Point Source + Background .. ... 133 Figure 6.8: Sample Output from WFPC2 ETC ­ Extended Source.. 134 Figure 6.9: Point Source Form for WFPC2 ETC ­ Emission Line & LRF.. ... 175 Figure B.1: Point Source SNR vs. ...

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• Target Count Rates
• Appendix B: Point Source SNR Plots
• Plots for Estimating Point Source SNR

This WWW form allows the user to list selected portions of the NRAO/VLA Sky Survey (NVSS) radio source catalog. ... Until the completion of the survey the source catalog will NOT cover the entire region of the survey and care must be exercised in interpreting the results of a catalog search. ... The second parameter in the "Search radius" box or one of the optional items in a position list can be used to specify a region in which to look for other sources. ... An example of a position list entry is: . ...

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• NVSS Source Search ($Revision: 1.6 $ - running v2.17)
• G33.6+0.1
• G338.3-0.0

... Data Reduction FAQ > A number of OmegaCAM filters show vignetting in their central regions. What are the causes for this and what are the dimensions of these features? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... A number of OmegaCAM filters are not monolithic, but consist of four segments (each covering 8 detectors) that have a central cross-shaped support structure. ... Filter . ...

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• The Cross-correlations
• Previously Identified Sources
• N44 in the Large Magellanic Cloud (Central Region) | ESO

... Solar flare activity is produced by the processes of accumulation and release of energy in an active region. ... In the framework of study of solar active regions, producing powerful flares the researchers from the RATAN-600 radio telescope have detected sources with features in the form of a sharp drop in the intensity of polarized radiation in various parts of the recorded frequency range (2-16GHz), sometimes changing the sign of polarization. ...

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• RCJ0311+0507
• Study of radio spectra and variability of GPS sources

... 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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• SCORPIO: IFP Gallery
• Results scientific researchs 20
• V.Shergin's Home Page

... Near-IR broad-band imaging of V1318 Cygni reveals the presence of two distinct stellar components oriented north-south, a result recently reported by Aspin et al. ... The distribution of the high density molecular gas traced by the CS J emission is highly concentrated around V1318 and V1686 Cygni, while the total column density of gas traced by the J shows a ridge morphology centered on these sources. ... A molecular outflow has been detected in CO J . ...

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• Corona & solar wind
• NIR Inages of H2O Masers (Abstract)
• Arcetri H2O Maser catalog

Venus in visible light (violet filter) 17k jpg . Venus in visible light 73k gif . image from Pioneer Venus 15k jpg ; 28k jpg ( caption ) . ... UV image from HST WFPC2 (false color) 23k jpg ; 99k gif . ... New Magellan mosaics (5 hemispheres) 13500k tiff ; ( caption ) . ... 7 pancake volcanoes, alpha region 227k gif ; . Lada Regio, 47 deg S, 25 Long, showing mountains and craters 121k gif ; . ... False color IR image of Venus' lower clouds as seen by Galileo 37k jpg 112k gif ( caption ) . ...

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• APOD: July 29, 1998 - The High Energy Heart Of The Milky Way
• Open Source Convention
• Sternberg Astronomical Institute

Venus in visible light (violet filter) 50k gif ; 25k jpg . ... image from Pioneer Venus 15k jpg ; 28k jpg ( caption ) . ... 7 pancake volcanoes, alpha region 227k gif ; 327k jpg . ... Lada Regio, 47 deg S, 25 Long, showing mountains and craters 121k gif ; 321k jpg . ... Gula Mons and Cunitz crater, flat image of gulacun.gif 250k gif ; 178k jpg . ... Crater Farm, Lavinia Region, small 107k gif ; 147k jpg . ... Central Ovida region, 1 deg s by 83 deg 191k gif ; 531k jpg . ... Pictures .. ... Venus .. ...

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• The Sun
• Planetary Picture List
• Radiation belts [Oulu]

... Flux Sign Expo . ... 0.13 PHA . ... The map above is movable . ... Original shows mosaics with all data available. Flux map Error map Significance Exposure . Flux and error maps are in mCrab units. All maps are convolved with instrumental point spread function (PSF) which is Gaussian ( =5'). 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 . ...

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... Energy . ... Solar Wind . ... Field . ... The Sun is our nearest star and the source of energy for life on Earth. ... For centuries astronomers wondered whether they were clouds floating in the Sun's atmosphere, but we now know that they really are huge regions of magnetic field, about as intense as the field at the poles of an iron magnet. For some reason the field slows down the flow of heat from the Sun's interior and keeps sunspots slightly cooler than their surroundings. ... Solar Eclipses . ...

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• The magnetosphere models
• The Earth's Magnetosphere
• "Exploration" as a Classroom Resource

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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• Discussion and conclusions
• X-ray Galactic Sources and Binary Radiopulsars as Probes of the Initial Mass
• Spatial distribution of X-ray binaries at the Galactic center after the

. Comment on J1239-1023 . No image is shown by Dallacasa et al. (1998) as they did not find the VLBI structure at 2.3 and 8.4 GHz prominent, just dominated by a compact region barely resolved in position angle about -45 . In our case the source is well resolved, with a jet pointing to the W-NW direction, in agreement with what is seen in the images at 2.3 and 8.4 GHz from the VLBA Calibrators database. VLBApls home page . Last modified: 16 Oct 2000

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• VLBApls source sample

... comparison of the system performance for alfa and lbw at OH (.ps) ( .pdf ) (no amps in) . comparison of the system performance for alfa and lbw at OH (.ps) ( .pdf ) (with amps in) . ... On 01apr05 the system performance was measured using the continuum source CTA21 (B0316+162. ... The plots show the comparison of the system performance for alfa and lbw at OH (.ps) ( .pdf ) (no amps installed). ... Black is polA, red is polB. ... G/T alfa)/(G/T lbw) . ... The polB/polA performance ratios are: . ...

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• http://www.naic.edu/~phil/mbeam/calibration/01apr05_oh_performance.html
• Calibration Scans on Continuum Sources
• a2584

... Ultraviolet photons have short wavelength and high energy and thus come from sources which have fairly high temperatures. ... Star formation regions in nearby galaxies . Star formation regions in our own galaxy . ... In addition, the background glow of the night sky is at a minimum level at around 2000 angstroms. ... It is hoped that these very diffuse galaxies can be more easily imaged at a wavelength where the noise from a background of finite brightness is at its minimum. ...

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• The Galaxy Gallery Page 6: Comparative Morphology
• Geothermal Energy
• Lecture XVIII.

... X-Rays from the Galactic Core . ... CXC , NASA Explanation: Using the orbiting Chandra X-ray Observatory, astronomers have taken this long look at the core of our Milky Way galaxy, some 26,000 light-years away. ... This suggests that this supermassive black hole has been starved by a lack of infalling material. ... Publications with keywords: X-ray - Milky Way - Galactic Center - Sgr A - black hole . Publications with words: X-ray - Milky Way - Galactic Center - Sgr A - black hole . ...

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• X Rays from the Galactic Core
• Journal "Peremennye Zvezdy"
• The High Energy Heart Of The Milky Way