... A detailed study of two consecutive bright points observed simultaneously with CDS, EIT and MDI is presented. The analysis of the evolution of the photospheric magnetic features and their coronal counterpart shows that there is a linear dependence between the EIT Fe XII 195? flux and the total magnetic flux of the photospheric bipolarity. ... In a follow-up study, we used wide slit (90arcsec240arcsec) movies of four EIT coronal bright points (BPs) obtained with CDS. ...

[ CATS home ] [ Back to CATS list ] [ ftp ] . 2000ApJS..131..335Rutledge+ . Division of Physics, Mathematics and Astronomy MS 220-47, California Institute of Technology, Pasadena, CA 91107 rutledge@srl.caltech.edu, rb@astro.caltech.edu, prince@srl.caltech.edu

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. ...

We report on recent observations of molecular clouds in the tidal Magellanic Bridge; specifically, the Ы?kpc-long, tidally extended "tail" of the Small Magellanic Cloud. In particular, we identify an unusually high 12CO(3-2)/12CO(1-0) ratio of 2-3 to 1, toward one of the clouds, suggesting a warm and dense molecular material associated with imminent or current formation of stars. ...

... The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s -1 . ... 1S We present a summary of an identification program of the more than 2000 X-ray sources detected during the ROSAT All-Sky Survey (Voges et al. 1999) at high galactic latitude, |b| > 30degr , with countrate above 0.2 s -1 . This program, termed the ROSAT Bright Survey RBS, is to more than 99.5% complete. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

The 1000 Brightest HIPASS Galaxies: HI Properties . ... These belong to 91 new sources for which no optical or infrared counterparts have previously been cataloged, an additional 51 galaxies for which no redshifts were previously known, and 16 galaxies for which the cataloged optical velocities disagree. ... J0001-15, ( ps eps , jpg ) J0035-25, ( ps eps , jpg ) J0105-06, ( ps eps , jpg ) J0221-20, ( ps eps , jpg ) . ... The 1000 Brightest HIPASS Galaxies: Newly Cataloged Galaxies . ...

Today's APOD | ... Editor's choices for the most educational Astronomy Pictures of the Day about reflection nebulae: . APOD: 1999 October 31 - The Witch Head Nebula . ... APOD: 1999 March 1 - Reflection Nebula NGC 1435 . ... The nebula , cataloged as NGC 1999, is a reflection nebula , which shines by reflecting light from a nearby star. ... Reflection nebula NGC 1999 lies about 1500 light-years away in the constellation Orion , just south of Orion's well known emission nebula, M42 . ... Index | ...

... The Brightest Spot on Ceres . ... Credit Copyright: NASA , JPL-Caltech , UCLA , MPS/DLR/IDA Explanation: Dwarf planet Ceres is the largest object in the Solar System's main asteroid belt with a diameter of about 950 kilometers. ... Dwarf Planet Ceres . Bright Spots Resolved in Occator Crater on Ceres . An Unusual Mountain on Asteroid Ceres . Fly Over Dwarf Planet Ceres . Dwarf Planet, Bright Spot . Dark Craters and Bright Spots Revealed on Asteroid Ceres . ...

Once students get the hang of it, they can find and measure the brightness of Delta Cephei in a few minutes. ... of Delta Cephei . ... Oct. ... The following table lists the measurements of Delta Cephei made by one amateur astronomer in autumn 1990. ... 4.0 . ... This activity is a simplified version of one that appeared in Hands-On Astrophysics, a series of activities prepared by the American Association of Variable Star Observers with support from the National Science Foundation. << previous page | ...

Proposal Identification No.: ... At mid-latitudes, OI 844.6 nm emission brightness is a potentially excellent proxy for [O], and recent improvements to its forward emission model warrant renewed effort to pursue ground-based sensing using this unique emission. ... To this end, we propose several observational campaigns, spanning a variety of seasonal conditions, using combined passive optical and incoherent scatter radar instrumentation. ...

... Flux density at 1 GHz (/Jy): 160 . ... Radio: Limb-brightened to NE, with faint extension to the E. Optical: Brightest to the NE, with faint filaments outside the NE boundary. ... WSRT at 610 MHz (1'?2'.5), 1415 MHz (24"?63"), and part at 5 GHz (12"?31"). ADS . ... Mean optical velocity. ... Fesen 1984, ApJ, 281, 658. ... IR observations of shocked O 2 . ... Observations of shocked molecular H 2 . ... Observations of shocked molecular species. ... ISO observations of shocked molecular H 2 . ...

The night sky brightness, together with number of clear nights, seeing, transparency, photometric stability and humidity, are some of the most important parameters that qualify a site for front-line ground--based astronomy. ... Night sky at ESO-Paranal (Chile). ... Night sky brightness data . ... UBVRI night sky brightness at ESO-Paranal during sunspot maximum (A 2003, PDF) . ... The Dancing Sky: six years of night sky observations at Cerro Paranal (Starlight 2007 conference proceedings, PDF) . ...

Left: An image in the near infrared (1.65 ЮМm) around RY Tauri, using a special mode of the Subaru HiCIAO coronagraph, the polarized intensity image. This type of observation is preferred for faint emissions associated with scattered light around planet-forming disks, as there is less light from the much brighter star. ... A white ellipse shows the position of the midplane of the disk, which is observed at millimeter wavelengths. ... Right: Schematic view of the observed infrared light. ...

Supernova 2002bu in NGC 4242 . This page is devoted to information on Supernova 2002bu in NGC 4242 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. This is a type IIn supernova found in a galaxy which is in Canes Venatici. ... Mag . ... 2002/03/28.26 . ... A Leroy image . ... SUPERNOVA 2002bu IN NGC 4242 . ...

... 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. ...

... Определение высот полярных сияний по базисным снимкам Тикси. ... Береговой эфект в высотах полярных сияний. ... Результаты определения высот полярных сияний в б.Тикси в 1964г. Геомагнетизм . ... Проблемы космической физики (ПКФ), ?5, 1970 . ... ПКФ, ?15, 1980 . Вспышки блеска комет и солнечная корпускулярная активность. ... 1980 . Корпускулярноактивные области Солнца и вспышки блеска комет. ... Вспышки блеска комет. ... О гало льдистых тел, как возможном источнике вспышек блеска комет. ...

... 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 | ...

Chandra ACIS Survey of M33 (ChASeM33): X-ray Imaging and Spectroscopy of the Bright SNR M33SNR21 T.J. Gaetz, R.J. Edgar, P.P. Plucinsky, M. Sasaki (SAO), P. Ghavamian, W. P. Blair (Johns Hopkins) B. Williams (U. Washington), K.S. Long (STScI), P.F. Winkler (Middlebury College), J.P. Hughes (Rutgers) T. Pannuti (Spitzer Sci. ... The shor t axis of the M33SNR 21 X-ray axis runs through the brightest par t of the remnant, and the optical emission extends well beyond the X-ray rim in the southwest. ...

... filter1 . filter associated with the magnitude mag1 . The filter identifier filter1 must be at a shorter wavelength as the filter defined by filter2 . ... zero point corrected magnitude derived from the deadtime corrected count rate measured in the passband filter1 . This is the brightness which is used to calculate the colour (mag1-mag2) in the instrumental system (units: magnitude) . ... This is the brightness which is transformed into the standard system (units: magnitude). branch . ...