... Meta Index / Home Page / Description / Soft flare rejection for . The EPIC-pn fast timing mode was designed so that a time resolution of 0.029 milliseconds can be achieved. ... Below this energy the data is affected by so-called soft flares which are caused by stack overflows generated by high energy particles. These so-called soft flares have sharp rise (from 0 counts/sec to several thousand counts/sec in 0.10-0.15 sec) then decaying back 0 counts/sec slightly slower in about 0.3-0.4 sec). ...

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• EPIC Background

... A Year of Resolving Backgrounds . ... In X-ray light the recently launched spacecraft Chandra and XMM resolved much of the seemingly uniform X-ray background into many discrete sources, many of which appear to be black holes at the centers of galaxies accreting matter. In microwave light , the BOOMERANG and MAXIMA-1 missions resolved with new clarity the seemingly uniform microwave background . ... Publications with keywords: cosmic microwave background radiation . ... Our Dusty Universe . ...

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• Астронет > A Year of Resolving Backgrounds
• Journal "Peremennye Zvezdy"
• The Cosmic Infrared Background

... Usually, H I is seen as bright emission against a darker background, but under the right viewing conditions, it can also be seen as dark absorption against a brighter background. In the case where the background is itself H I emission, the hydrogen is said to be self-absorbed, and the radiative transfer process is termed H I self-absorption (HISA). ... Shown below is a single CGPS H I 21cm spectral line channel at a radial velocity of -41 km/s in the Local Standard of Rest, at l =140њ, b =+1њ. ...

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• HISA Poster for the 33rd Annual Meeting of CASCA, May, 2002
• Thesis Figures
• HISA Poster for the 197th Meeting of the AAS, January, 2001

WFC3 Instrument Handbook for Cycle 24 . ... Wide Field Camera 3 Instrument Handbook for Cycle 24 > Chapter 8: Slitless Spectroscopy with WFC3 > 8.5 Extraction and Calibration of Spectra . ... A spectral extraction software package, called aXe , is available to extract, flat-field, wavelength- and flux-calibrate WFC3 grism spectra. ... Extraction of WFC3/IR slitless spectra depends on an accurate determination of the diffuse background light that is observed in all grism exposures. ...

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• The Hubble Deep Field -- Schedule 11/10/95
• COS Spectroscopic Observing Strategies
• Surface Brightness of Background Light

Next: Gravitational Wave Background from Previous: Galactic Gravitational Wave Background . ... It is intuitively clear that at frequencies above the critical ones for our Galaxy, one will detect rare bright jerks produced by coalescing white dwarfs   (at a rate of 1 per 100 year) and NS (at a rate of 1 per - year) in our Galaxy, against a background of the extragalactic stochastic GW. ... Firstly we consider GWB from close individual galaxies, and then will discuss overall extragalactic GWB. ...

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• Transparency of the Stochastic Background
• Gravitational wave background from nearby galaxies

... In the three intervening decades there have been many observations of this diffuse emission over a wide range of x-ray energies. ... During the 1970's researchers at the University of Wisconsin, lead by Dr. William Kraushaar, used a series of sounding rocket flights to map the diffuse x-ray emission from the sky in several bands. ... University of Wisconsin Sky Survey map of the B-band (0.13-0.188 keV) x-ray intensity. ... University of Wisconsin Sky Survey map of the 2-6 keV band x-ray intensity. ...

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• *imcalc* - Obtain a background subtracted image for ROSAT PSPC Data

Galileo false-color image of asteroid 243 Ida and its small satellite Dactyl (at right). ... Central Latitude/Longitude (deg): -20., ... Instrument: Solid State Imaging CCD Camera . ... Instrument Field of View (deg): .46 x .46 . ... Illumination Incidence Angle (deg): 13. Phase Angle (deg): 27. ... Surface Emission Angle (deg): 34. ... NASA Image ID number: P-44131 . ... Code 633, NASA Goddard Space Flight Center . Greenbelt, MD 20771, USA . ... Code 630, NASA Goddard Space Flight Center . ...

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• The Face on Mars
• A collection of images
• A Bright Ring Of Star Birth Around A Galaxy's Core (PR98-21)

... 2001 April 25 . Space Laser Creates Artificial Star . ... So rather than try to eradicate existing stars with a laser, these astronomers create an artificial star of their own right where they need it -- with a laser . Subsequent observations of the artificial laser guide star can reveal information so detailed about the blurring effects of the Earth's atmosphere that much of this blurring can be removed by rapidly flexing the mirror. ... About APOD | ...

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• APOD: 2006 September 5 - Bright Cliffs Across Saturns Moon Dione
• APOD: 2000 December 30 - A Year of Resolving Backgrounds
• APOD: 2010 April 16 - Bright Points on the Quiet Sun

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• Galaxy Gallery Page II
• Galaxy Gallery Page III
• HST Deep Field Data

... 1Haynes+ A catalogue at 5 GHz of 915 sources in the Galactic plane is presented. Sources with a peak beam brightness temperature of at least 0.2 K above the surrounding background are included, except in confused regions; a point source of 0.2 K corresconds to 0.26 Jy. ... It was assumed that Hydra A was a point source with a peak flux density of 13 Jy at 5 GHz; this is equivalent to a mean beam brightness temperature of 10.0 K for a beamwidth of 4.1x4.4'. ...

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• WSRT deep surveys
• The ROSAT All-Sky Survey Bright Source Catalogue
• RBSC-NVSS SAMPLE. I. RADIO AND OPTICAL IDENTIFICATIONS

... Дни открытых дверей к юбилею САО РАН (12-14 апреля 2016 г.) . Международная конференция "Dark Ages and White Nights (Spectroscopy of the CMB)" (20-24 июня 2016 г.) . ... Международная конференция MULTI-SPIN GALAXIES - 2016 (26-30 сентября 2016 г.) . Международная астрономическая конференция "Физика звезд: от коллапса до коллапса" (3-7 октября 2016 г.) Архив . ... Подробнее.. ... 10.02.16 . ... БТА в реальном времени . ... Цейсс-1000 в реальном времени . ... Последнее обновление: 22/03/2016 ...

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• Detection of unique bright radio flare of X-ray binary
• CH Cyg
• GRB080319B

... The remote planet Pluto and its moon Charon orbit the Sun at a mean distance of almost 6,000 million kilometres, or nearly fourty times farther out than the Earth. During a recent investigation by an international group of astronomers [1], the best picture ever of Pluto and Charon [2] was secured with the European Space Agency's Faint Object Camera at the Hubble Space Telescope (HST). ... The new HST image was taken when Charon was near its maximum elongation from Pluto (0.9 arcseconds). ...

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• The Brightness of the Night Sky
• Interquadrant row crosstalk
• Rapid Changes in the Inner Coma of Comet Hyakutake

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...

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• Wavelength Calibration at Moderately High Resolution
• A New Entropy Measure Based on Multiple Resolution and Noise Modeling
• ADASS 2002 Conference Proceedings

... Flux density at 1 GHz (/Jy): 19 . ... Notes: This is the remnant of the SN of AD 1006. ... Optical: Filaments to the NW, with broad H component. ... Point sources: The background Schweizer Middleditch star is near the middle of the remnant. ... van den Bergh 1976, ApJ, 208, L17. Optical observations. ADS . ... X-ray spectroscopy. ... Schweizer & Middleditch 1980, ApJ, 241, 1039. ... Optical spectroscopy of the Schweizer Middleditch star. ... Optical spectroscopy. ... 2013, A&A, 552, A9. ...

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• G332.4-0.4
• NVSS Image ftp service (5 August 1998)
• G4.5+6.8

The Face on Mars . ... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . Table 2: Dimensions of Mercator Projected Images of "The Face on Mars" . Map Projected Images . ... Processing the "Face on Mars" Images . ... This page will provide interested persons with both the raw Viking images, transformed to GIF format, and a brief tutorial (with examples) of image processing techniques applied to create "better looking" images. ...

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• Saturn's Moon Enceladus
• Kuiper-Oort
• Auroral Images

This figure shows, on the left, images of Encke on three successive days from November 6 to November 8; on the right, images of ISON are shown for three successive days from November 9 to November 11. ... Green circles indicate some of the brighter cataloged background stars in each image; yellow marks bracket the comets. The background stars are fixed in each image from top to bottom, so the motion of the comet relative to the stars is clear in each case. ...

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BFB0F2B54-CE00-4156-B751-56F2CFB848B7%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B63D833D8-103D-4FA8-87FF-FEFAD684280D%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B7FB1DE71-9334-49A7-B8C1-938ACCA4A41F%7D

... Outline of the BTF paper by Erwin de Blok (25-2-2002) ----------------------------------------------------- * Description of sample * Data and corrections * Descriptions of method to measure line widths * Description of method to measure inclinations * Corrections to linewidths and magnitudes (inclination, random motion, instrumental resolution, extinction) * Corrections to recession velocities (to Local Group frame, also POTENT etc for nearby galaxies) * Describe B-band ...

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• Jim Lovell Article
• SKAreport
• Near-infrared millihertz variability of the wisps and jet in the crab pulsar

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

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We have obtained simultaneous high resolution H alpha and Na I D spectra of five dwarf M stars that span a wide range in chromospheric activity level. ... However, the H alpha line systematically indicates a value for the mass loading at the onset of the Transition Region and the location of T_min that is 0.4 dex lower in column mass density than that indicated by NaI D. Therefore, the profile of both lines cannot be simultaneously well fit for all but one of our stars. ...

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• Explosive Events
• Armagh Observatory
• HISTORICAL BACKGROUND

High resolution near-infrared interferometric imaging of the ultracompact H II region K3-50 A S. Kraus(1), Y. Y. Balega(2), K.-H. Hofmann(1), T. Preibisch(1), G. Weigelt(1 ) MPIfR Abstract (1) Max-Planck-Institut fur Radioastronomie, Bonn, Germany Ё (2) Sp ecial Astrophysical Observatory, Karachai-Cherkesia, Russia Only for the 10 µm source STHO 1 we can see no counterpart in our K -band image. ... It is also interesting to compare the K -band and N -band fluxes of the sources. ... 2003). ...

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• Results scientific researchs LRS
• Home Page
• Optimization of spectroscopic observations