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. ...

Target Acquisition Reference Information . ... In almost all cases where an onboard acquisition will not work (because the object is in a crowded field, or is variable, or is a moving target), it is sufficient to use an early acquisition to get a WFPC2 or FOC image a few weeks in advance of the GHRS observation. ... Explicit BRIGHT and FAINT limits may be specified if you desire, although there is an increased risk of a failed acquisition unless you are confident of those fluxes. ... MAPs . ...

... Ignacio Ugarte Urra's PhD thesis topic is the investigation of coronal bright points. In his first paper (in collaboration with Gerry Doyle and Maria Madjarska) he investigated the formation, evolution and decay of a coronal bright point via a spectroscopic analysis of its transition region counterpart and the evolution of the underlying magnetic bipole during 3 days of almost continuous observations. ... In general the bright point has a radiance 4 times higher than that of the network. ...

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 | ...

... 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....

... Meta Index / Home Page / Description / Specifying source region shapes . When radiusstyle =`contour', the task calculates the source region shape as an elliptical locus which approximates the contour of the PSF at a given flux value. ... Clearly, in order to calculate the shape of such a flux contour, it is necessary firstly to normalize the PSF to the source brightness and secondly to determine the flux level (in `brightness' units per pixel) at which to find the contour. ...

... Usage: oicopy [--target_id n] [--arrname array] [--overwrite] [--flag vis/vis2/t3amp/t3] infile outfile -t/--target_id: only copies records for specified TARGET_ID -a/--arrname: only copies tables with specified ARRNAME -o/--overwrite: overwrite output file -f/--flag: flag all data of specified type (vis/vis2/t3amp/t3) Other switches will be added later. """ __revision__ = '$Revision: 1.4 $' import sys, getopt, os, string import oi_fits, pyfits, ieee def readfile(fileName): """Read FITS file. ...

. Figure 3. Dark dimmings and bright post-eruption arcades in solar sources of the severest FDs over the solar cycle 23 in SOHO/EIT 195 е fixed-base difference images. The FD magnitude of the strongest disturbances and the dates and time of their registration are specified in the upper right corner of each panel. The dates and time of EIT images subjected to the subtraction are specified at the bottom of each panel.

... StarMgr Class Reference . ... Get the current color used to label bright stars. ... Get Epoch for maximum light for a variable star with a specified Hipparcos catalogue number. static int StarMgr::getGcvsMagnitudeFlag . ... Get the magnitude flag code for a variable star with a specified Hipparcos catalogue number. static float StarMgr::getGcvsMaxMagnitude . ... Get the minimum magnitude or amplitude for a variable star with a specified Hipparcos catalogue number. static int StarMgr::getGcvsMM . ...

... It displays information about every token from document as they produced by a parser and processed by dictionaries as it was defined in configuration, specified by cfgname or oid . tsdebug type defined as CREATE TYPE tsdebug AS ( "Alias" text, "Description" text, "Token" text, "Dicts list" text[], "Lexized token" text . ... In this example, the word 'Brightest' was recognized by a parser as a Latin word (alias lword ) and came through a dictionaries public.en_ispell,pg_catalog.en_stem . ...

... Another Nearby Supernova in the Whirlpool Galaxy . ... Credit Copyright: Stephane Lamotte Bailey, Marc Deldem , Jean-Luc Dauvergne Explanation: One of the brightest supernovas in recent years has just been recorded in the nearby Whirlpool galaxy (M51). ... Pictured above are two images of M51 taken with a small telescope: one taken on May 30 that does not show the supernova, and one taken on June 2 which does. The June 2 image is one of the first images reported to contain the supernova. ...

Next: Power Law fit to Up: Spectral Analysis Previous: Error Determination . With PROS2.3 all fitting is performed using Poisson statistics , rather than Gaussian, so that results will be correct even for small counts ( ) in some channels. Power Law fit to a Point Source . Raymond Model . Two-Temperature Raymond Model . Limiting Energy Channels Input to the Fit . Multiple Data Sets . ... Fit a source with a small number of net counts . Inspection of results . ...

... Drag data has the following properties: . Drag action type (ie GDK_ACTION_COPY, GDK_ACTION_MOVE). ... A GDK_ACTION_COPY would be a typical drag-and-drop without the source data being deleted while GDK_ACTION_MOVE would be just like GDK_ACTION_COPY but the source data will be 'suggested' to be deleted after the received signal handler is called. ... Sent and received data format types ( selection target ) come into play only in your request and received data handler functions. ...

... 172, Astronomical Data Analysis Software and Systems VIII, eds. D. M. Mehringer, R. L. Plante, & D. A. Roberts (San Francisco: ASP), 407 . ... To facilitate data retrieval, we have created U-DARES, a user-friendly program that lets one look directly at the data in the USNO-A catalog, either as a graphical sky map, a plot, or a simple text table. ... To help PC users solve the problem of data retrieval, we have created the USNO-A Catalog Data Retrieval Software, or U-DARES. ...

... Since moonshine is really reflected sunlight, the full Moon is on the average slightly brighter in mid-winter, when Earth is closest to the Sun. In addition, the distance of the full Moon also varies, due to the ellipticity ("eccentricity") of the Moon's orbit. On 22 December, 1999, the two effects combined to produce the brightest full Moon of the century. ... This year will be the first full moon to occur on the winter solstice, Dec. 22nd, commonly called the first day of winter. ...

... Class . ... METHOD . ... java.lang.Object java.awt.Component java.awt.Container java.awt.Window java.awt.Frame ij.plugin.frame.PlugInFrame ij.plugin.frame.ContrastAdjuster . ... public class ContrastAdjuster . ... Nested classes/interfaces inherited from class java.awt.Frame . ... Nested classes/interfaces inherited from class java.awt.Window . ... Nested classes/interfaces inherited from class java.awt.Container . ... Nested classes/interfaces inherited from class java.awt.Component . ... void . ...

. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

New Moons of Uranus . Brent Gladman's Home Page . ... The discovery of two probable distant satellites of Uranus was reported by B. Gladman, P. Nicholson, J. Burns and J. Kavelaars. ... This discovery was reported in the IAU Circular 6764 . ... Discovery image of S/1997 U 2 . This shows the discovery image of brighter of the two new moons of Uranus. ... This shows the discovery image of faint new moons of Uranus. ... This shows another discovery image of faint new moons of Uranus. ... Uranus . ...

... Comet Tutorial . ... On July 1, 1993 an image was taken with the Hubble Space Telescope (HST) that clearly shows at least 15 individual fragments in one image frame of the train. ... This made an accurate orbit (or orbits) difficult to determine; however, after numerous observations of the comet, astronmers determined that the comet had passed within 96,000 kilometers (60,000 miles) of the center of Jupiter or 25,000 kilometers (16,000 miles) from the cloud tops during the July 8, 1992, approach. ...