... The WFPC2 cameras have significant geometric distortion which not only affects astrometry, but also affects photometry (because the extended sources used to generate flat fields have an induced change in apparent surface brightness). It can be a large effect, with "true" positions differing from observed positions by several pixels in the corners of the cameras. ... The cubic distortion coefficients can be used to derive effective pixel areas as presented in Figure 5.12 . ...

Astronomy Picture of the Day . Bright Points on the Quiet Sun . ... Explanation: Up close, the solar surface is a striking patch work of granules in this very high resolution picture of the quiet Sun . ... Constantly present on the solar surface, the bright points do not seem to be related to sunspots that come and go with the magnetic solar cycle . ... Publications with keywords: Sun - magnetic field - granules . Publications with words: Sun - magnetic field - granules . ... A Solar Ballet . ...

... 2010 April 16 . Bright Points on the Quiet Sun . ... Explanation: Up close, the solar surface is a striking patch work of granules in this very high resolution picture of the quiet Sun . ... Constantly present on the solar surface, the bright points do not seem to be related to sunspots that come and go with the magnetic solar cycle . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . NASA Web Privacy Policy and Important Notices . A service of: ASD at NASA / GSFC . ...

... They worked out that first magnitude was on average 100 times brighter than the 6th magnitude star. ... This formed an equation of apparent magnitude Mv which is: Mv = -2.5 log f + constant were f is the flux of that star f = ( counts/ exposure) The images that we worked on were taken by the Polar Bear Telescope. ... One of these being that it will be combined with standard stars, which will be used to identify the area of stars and to also help identify other stars within the image. ...

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Exoplanets . ... Star Clusters . ... Stars@ESO . ... ESO 3.6-metre telescope . ... TRAnsiting Planets and PlanetesImals Small Telescope . ... Brightness "dips" of the stars OGLE-TR-113 (upper) and OGLE-TR-132 (lower), as observed during the OGLE survey. It is now known that they are caused by transiting extra-solar planets (exoplanets) of the new "very hot Jupiter" class. ...

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. ...

... In August 2009, amateur and professional astronomers reported that the bright star Epsilon Aurigae had begun to lose brightness for the first time in 27 years. ... Professional and amateur astronomers teamed up to monitor the eclipse and have announced that this critical phase ended around New Year s Day 2010. ... Even during the eclipse, the star is so bright that sensitive equipment in professional observatories can have trouble monitoring its brightness in the optical wavelengths. ...

XMM-Newton Science Analysis System . ... A different approach is done via the setting withctisrcpos =Y: all event energy corrections do not use the actual RAWY coordinate but the corresponding RAWY location of the source ( SRCPOS ) as determined by the task epframes (either automatically or via setting withsrccoords =Y). ... The task epchain may be used with the setting ccds =4 withctisrcpos =Y to process only the CCD 4 where usually the bright source is located that causes the Out-of-Time events. ...

Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... Meade Pictor XT-Series CCD Autoguider/Imagers . ... The status bar provides tool tips for each menu item, communication status information, the current x and y coordinates of the mouse on the active image, and the temperature of the CCD chip. (left to right): . ... File Save: Saves the current active image. ... about meade | ...

Nova 1998 2 in M31 this image of the second Nova in M31 in 1998, was made from 38 exposures of 45 seconds integration time. It was made at September 21, 22h 20m UT. Telescope was a CG11 at f/6.3, no filters were used. The long list of processing steps caused the artefacts at the overexposed center of the galaxy and in many of the brighter stars. During the exposures thin clouds covered the sky but the CCD cuts through them, allowing me to obtain this result. ...

... Behemoth black hole found in an unlikely place . ... Spectacularly bright object in Andromeda caused by "normal" black hole . ... A spectacularly bright object recently spotted in one of the Milky Wayт??s neighboring galaxies is the result of a т??normalт?? stellar black hole, astronomers have found. ... Other scientists say ULXs are caused by material being dragged in by an intermediate-sized black hole formed from the merger of many stellar-mass black holes т?? about 1,000 times bigger than the...

... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

Above is an image of a Chandra Low Energy Transmission Grating (LETG) spectrum of a very bright X-ray source, the nova XTE J1118+480, showing only the shortest wavelengths. ... Bright spot in center = the source (i.e., 0th order of the spectrum) . Bright diagonal line extending corner to corner = the main dispersed spectrum (1st and higher orders) . Bright line perpendicular to the main spectrum = cross-dispersion spectrum of 0th order, caused by the LETG fine-support structure . ...

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

Physical and dynamical parameters of particles in outbursting Comet 17 P/Holmes . ... The time depending offset between the center of brightness and center of mass of the comet nucleus has been determined on the ground of positional observations of the comet. ... The motion of these particles allowed subsequent offset between the center of brightness and center of mass of the comet nucleus to be obtained from positional observations. ... comet, dynamical model, outburst, brightness. ...

STAR OF BELLE ISLE One evening for pleasure I rambled To view the fair fields all alone Down by the banks of Loch Erin Where beauty and pleasure were known I spied a fair maid at her labor Which caused me to stay for a while I thought her the Goddess of Beauty The blooming bright star of Belle Isle I humbled myself to her beauty "Fair maiden, where do you belong? Are you from the heavens descended Abiding in Cupid's fair throng?" ...

image collection >> physical phenomena >> vortices . Image ers0205130118 . ... Cyclonic eddies on the front of the Soya Warm Current, La Perouse Strait. In the SAR image, the narrow bright band ~1 km wide is caused by current shift and starts near Kamen Opasnosti (Rock of Danger) where cold waters are located (see AVHRR image ). ... The third eddy also has the cold central area with SST equal to 5°C. The coldest waters (4°C) form a band to the southeast off the eddy's centre. ... Image . ...

Тема : Орбитальная обсерватория НАСА Кеплер при? смерти .. Показать сообщение отдельно . ...

You Can Make Stellar Images Brighter . Articles | ... A few months ago I wrote an article titled "You Can’t Make Them Brighter". So why am I now writing that you can make them brighter. ... The image of a focused star is actually a small disk called the Airy disk, named after the 19 th century scientist Sir George Airy. ... For a given aperture, a smaller Airy disk means that the light is focused to a smaller disk and is therefore brighter. ... www.astronomy.net . About Astronomy Net | ...

... The nominal output of a CCD--element to a quantum of light can be given as . ... In the following we ignore the pre-flash and skim term, and hence only take the bias and dark frames into account. The objective in reducing CCD frames is to determine the relative intensity of a science data frame. ... flat frames to determine the term . ... This is achieved by averaging Dark, Flat and Science frames. is further reduced if S=F , then Equation ( ) simplifies to . ...