... A new bright LBV (Luminous Blue Variable) star was detected in M33 galaxy. LBV stars are the most massive stars in the final stages of evolution before exploding in of supernovae. ... The new LBV star (Fig.1) is the seventh in M33. ... It is one of the brightest LBV stars of the M33 galaxy. ... The brightest object is the core of the galaxy, - a compact star cluster comprising a supermassive black hole. The new LBV star N93351 is located down and to the left from the core. ...

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... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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... V838 Mon is a member of a new class of eruptive variables which appear as a peculiar novae having late K-M type spectra in their outburst. Before its outburst, it was a wide binary system of B3V type stars. ... The B3V companion was seen in the outburst in the UV spectrum taken with HST (Rauch et al., ... In the latest spectra, the light of B3V companion was predominating in the short-wave photometric bands. ... CCD blue frames of V838 Mon before the eclipse (left) and in the eclipse (right). ...

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• http://jet.sao.ru/jet/~goray/estimate/text.html

... Bright spot spectra have been constructed by differencing the mean spectra observed at pre- and post-eclipse orbital phases. These difference spectra contain ultraviolet absorption lines and show the Balmer jump in emission. ... Model disk spectra constructed as ensembles of stellar atmospheres provide poor descriptions of the observed post-eclipse spectra, despite the fact that UX UMa's light should be dominated by the disk at this time. ... huizinga@stsci.edu . ...

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• STScI Preprint #1207
• Warm Dust and Spatially Variable Polycyclic Aromatic Hydrocarbon Emission in
• Variable Evolved Stars and Young Stellar Objects Discovered in the Large

A bright supernova, 1998S, has been found on March 3 by Chinese astronomers at Beijing Observatory. 1998S is located in NGC 3877 an UMa galaxy at R.A. = 11h46m06s, Decl. = +47o29'.0. ... Recent magnitude estimates show the star at around magn 12. ... It covers a field of 35'x35' and shows stars down to magnitude 15 and is mainly based on the GSC and USNO catalogues. ... Below follows a list of field and sequence stars located within ~20' from SN 1998S in NGC 3877: . ... TI (b-r)=+0.5 . ...

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• APOD: 2007 February 21 - Mira Over Germany
• Supernova 2000ch in NGC 3432
• APOD: 2013 September 9 - Nearby Cepheid Variable RS Pup

... Fractional flux density variations of between 5 and 100 per cent (typically 15-25 per cent) have been detected on a range of time-scales from 1 to 12 years. ... The 151-MHz flux densities have been indirectly scaled to the 6C flux scale. ... Amongst the 72 sources for which the chance of being a true variable is greater than 0.8, typical maximum flux density variations of 15-25 per cent are seen; eight objects show variations greater than 50 per cent, with one source varying by more than 100 per...

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• Radio patrol survey by Gregory and Taylor
• Summary

An image of the grand design of spiral galaxy M100 obtained with NASA's Hubble Space Telescope resolves individual stars within the majestic spiral arms. ... Hubble has the ability to resolve individual stars in other galaxies and measure accurately the light from very faint stars. This makes space telescope invaluable for identifying a rare class of pulsating stars, called Cepheid Variable stars embedded within M100's spiral arms. ... 617) 495-7062 . Fax: (617) 495-7356 . ...

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• Chandra Supernova Remnants Catalog - Instrumental Artifacts
• X--ray Quiet PMS Candidates

... 26.02.2007 . ... In an attempt to find out, the orbiting Spitzer Space Telescope made detailed observations of the atmospheres of two planets that orbit stars other than our Sun. ... It's not an astronomical nebula -- those appear to stay put. ... APOD: 2007 February 24- X rays and the Eagle Nebula . ... The premier Chandra X-ray Observatory images of M16, the Eagle Nebula, show many bright x-ray sources in the region. ... APOD: 2007 February 23- Dust and the Helix Nebula . ... February . ...

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... Cataclysmic Variables . ... The main aim of this survey is to discover new stellar binary systems with orbital periods less than ~80 min. ... The intensity of stellar objects can vary on a wide range of time-scales, ranging from seconds to months to years. ... Most of these surveys are sensitive to timescales longer than a day. ... For instance, the 0.3 deg x 0.3 deg survey using the Canada France Hawaii Telescope was sensitive to variations on timescales as short as ~8 min (Lott et al 2002) . ...

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• http://star.arm.ac.uk/~csj/nuffield/posters/2008_stephen_maxwell_poster.pdf
• Armagh Observatory
• PULSATION PROPERTIES

The ESA/ESO Astronomy Exercise Series 2 . The Distance to Messier 100 as Determined by Cepheid Variable Stars . ... The small variations in distance to the individual Cepheid variable stars in the Cloud are negligible compared with the much larger distance to the SMC. ... In this way Cepheid variable stars can be used as one of the 'standard candles' in the Universe that act either as distance indicators themselves or can be used to calibrate (or set the zero point for) other distance indicators. ...

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• ASP: Star Science in the Autumn Sky
• ASP: Making Your Own Astronomical Camera
• ASP: Accidental Astrophysics: The Devil's In the Magnitudes, Part II

... BLUE STRAGGLER STARS are unusually hot and bright stars found in the cores of ancient star clusters known as globulars. ... BACKGROUND (from wikipedia): Blue straggler stars are stars in open or globular clusters that are hotter and bluer than other cluster stars having the same luminosity. ... There is evidence in favor of this view, notably that blue straggler stars appear to be much more common in dense regions of clusters, especially in the cores of globular clusters. ...

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• Cepheid Variables
• Siding Spring Survey
• C/2006 P1 (McNaught)

Supernova 2000ch in NGC 3432 This page is devoted to information on Supernova 2000ch in NGC 3432 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 Supernova links web page. ... Y. Sano image . 2000/04/26.5 . ... LOSS image . ... vsnet-chat 2901 ] NGC 3432 galaxy information . vsnet-chat 2908 ] about variable star in field of NGC 3432 . ...

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• Historical Supernova Boneyard
• Bright Supernova Bright Supernova
• Common problems

OptInt PmWiki : Pm Wiki / Pagelist Variables . ... When set to 1 (which is the default), causes (:pagelist:) and (:searchresults:) to exclude listing any pages for which the browser does not currently have read authorization. ... An array of page name patterns to be required or excluded from search and pagelist results. ... Use Search page in current group if it exists, otherwise use Site.Search $PageSearchForm = array('$Group.Search', '[=$[$SiteGroup/Search]=]'); . FPLTemplatePageFmt . ...

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• Astrophysics Group COAST Astronomical Results
• OptInt PmWiki : PmWiki / Upload Variables
• Astrophysics Group Research and Instrumentation

Chapter 11. Specifying OpenGL Environment Variable Settings . ... Several antialiasing methods are available and you can select between them by setting the __GL_FSAA_MODE environment variable appropriately. ... To see the available values for __GL_FSAA_MODE along with their descriptions, run: nvidia-settings --query=fsaa --verbose . The __GL_FSAA_MODE environment variable uses the same integer values that are used to configure FSAA through nvidia-settings and the NV-CONTROL X extension. ...

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• The Pleiades
• HISA Poster for the 195th Meeting of the AAS, January, 2000
• Brightest Pleiads Table

This long-exposure Hubble Space Telescope image of massive galaxy cluster Abell 2744 is the deepest ever made of any cluster of galaxies. ... It contains several hundred galaxies as they looked 3.5 billion years ago. The immense gravity in Abell 2744 acts as a gravitational lens to warp space and brighten and magnify images of nearly 3,000 distant background galaxies. The more distant galaxies appear as they did longer than 12 billion years ago, not long after the Big Bang. ...

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• Why do some stars appear to flash a variety of different colors when you look
• How do astronomers use Cepheid variables to measure distances? | Astronomy.com
• variable stars | Astronomy.com

To appear in "Fourth Workshop on Robotic Autonomous Observatories (2015)"RevMexAA(SC) METEOR OBSERVATIONS WITH MINI-MEGATORTORA WIDE-FIELD MONITORING SYSTEM S. Karpov, 1, 3 N. Orekhova2 G. Beskin, 1, 3 A. Biryukov3,4 S. Bondar,2 E. Ivanov,2 E. Katkova,2 A. Perkov, and V. Sasyuk3 RESUMEN 2 Favor de prop orcionar un resumen en espanol. ... The faintest detected meteors has the peak brightness about 10 mag, while the ma jority - from 4 to 8 mag. ... 2010; Karpov et al. 2013; Beskin et al. ...

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• astro-ph

.

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• Low Surface Brightness Galaxy Gallery
• The Galaxy Gallery: Messier Objects
• Galaxy Gallery Page III

... EDITOR Sets the editor that will be used by other programs such as the mail program. PAGER Sets the pager that will be used by programs such as man to display man pages. PATH Specifies the directories that the shell is to look through to find a command. ... PRINTER Sets the printer to which all output is sent by the lpr command SHELL Sets your default shell. TERM Sets your terminal type for programs such as the editor and pager. TZ Sets the time zone you are in. ...

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• Multiwavelength Study of Mira Ceti-Type Variable Stars
• Where are commands located?
• Rudnitskij Georgij M. Home Page

Next: Release of 16 October Up: Old Releases Previous: Release of 18 September Contents . ... 18 Oct 2001 RCW. ... 13 Dec 2001 RCW . ... Change TSETTLE to 6 for VLBA stations after experience with a 43 GHz phase referencing run that had 15 second scans. ... 2 Jan 2002 RCW . ... Add MINSETUP to the station catalog to deal with cases where there is a minimum scan change time regardless of the slew and settling times, but where this minimum time should not be added to scan changes with long slews. ...

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• SM - Glossary of Terms used in this Manual
• Pulsar Group PmWiki/Pagelist Variables
• Binary Variable Star Questions

... STScI-PRC99-19 HUBBLE FINDS VARIABLE STARS IN DISTANT SPIRAL GALAXY A NASA Hubble Space Telescope (HST) view of the magnificent spiral galaxy NGC 4603, the most distant galaxy in which a special class of pulsating stars called Cepheid variables have been found. It is associated with the Centaurus cluster, one of the most massive assemblages of galaxies in the nearby universe. ... Researchers found 36-50 Cepheids and used their observed properties to securely determine the distance to NGC 4603. ...

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• Uranus' Moon Umbriel
• K-band Arcetri Obscured Supernova Search - Detected Supernovae
• Uranus' Moon Ariel