The process of determining the number and characteristics of sources in astronomical images is so fundamental to a large range of astronomical problems that it is perhaps surprising that no standard procedure has ever been defined that has well understood properties with a high degree of statistical rigour on completeness and reliability. ... In this analysis we present results from testing such algorithms as implemented in the SExtractor, Selavy (Duchamp), and sfind tools on simulated data. ...

... Mark C. Lee (Colonel, USAF, Ret.) NASA Astronaut (former) . ... EDUCATION: Graduated from Viroqua High School, Viroqua, Wisconsin, in 1970; received a bachelor of science degree in civil engineering from the U.S. Air Force Academy in 1974, and a master of science degree in mechanical engineering from Massachusetts Institute of Technology in 1980. ... NASA EXPERIENCE: Lee was selected as an astronaut candidate by NASA in May 1984. ... Lee retired from NASA and the Air Force effective July 1, 2001. ...

This is the homepage of Andrew Fruchter, an astronomer on the staff of the Space Telescope Science Institute . ... Here you can look at an HST images of the optical counterparts of gamma-ray bursts and their host galaxies. ... Therefore, substantial information on the fine scale structure of objects can be obtained by offsetting the pointing of the telescope between exposures and then combining these "dithered" exposures into a single image. ...

... Комментариев нет 22 августа 2010, 13:58 Blogger , English , Астрономия . ... Neptune will finally complete its first full orbit of the sun since it was discovered in 1846a approximately one year from now, according to NASA estimates. ... Twitter Weekly Updates for 2010-08-21 . ...

... Space Research Institute . ... Main research and development work completed in 2009 and ready for implementation . ... Development of the Northern Eurasia land cover map based on medium spatial resolution satellite data. ... The research and development has been completed of the first in Russia and in the whole world high-speed digital streams decoder for space and satellite channels with extremely high noise levels. ... Main research and development work completed in 2008 and ready for...

... 2011 March 9 . The International Space Station Expands Again . Credit: STS-133 Shuttle Crew , NASA . Explanation: The developing International Space Station (ISS) has changed its appearance again. ... The ISS and many of its modules and expansive solar panels are visible in the above picture taken by the Discovery Crew after leaving the ISS to return to Earth. ... Work for APOD while researching the universe: Graduate student research assistant sought . Tomorrow's picture: open space . ...

Space Station Mir Over Earth . ... Credit Copyright: NASA , Russian Space Research Institute Explanation: This picture of the Russian space station Mir over the Pacific Ocean was recorded by the Space Shuttle Discovery in February 1995. ... Many scientific experiments and astronomical observations were completed jointly by the American astronauts and the Russian cosmonauts. ... Some cosmonauts have spent more than a year on board Mir, the longest anyone has ever lived in space. ...

... Gallery . ... The Common Room roof is completed . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: The Common Room roof is completed . Description: NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ... The Common Room roof is completed NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ...

Next: Star Formation and Stellar Up: Stellar Astrophysics Previous: The Chemical Evolution of . Amir Ahmad and Simon Jeffery have been studying some rare stars known, loosely, as helium-rich subdwarfs. ... Further study showed that PG1544+488 is in fact a double star with both stars having extremely helium-rich surfaces -- the first case known. ... Next: Star Formation and Stellar Up: Stellar Astrophysics Previous: The Chemical Evolution of M.E. Bailey . ...

ELEVENTH CREW REQUIRED RESOURCES EIGHTH RUSSIAN VISITING CREW ENEIDE ISM PROJECT IMAGE VIDEO . ... PRIME CREW . ... Lieutenant Colonel in the Italian Air Force, . ... EDUCATION: Graduated from the Italian Air Force Academy in 1989. Completed basic training with the US Air Force at Reese Air Force Base in Texas, US, in 1990. ... In 1997 he enrolled in US Air Force flight safety school and during the period of 1997 to 1998 he served as a regimental flight safety officer at the Italian Flight Center. ...

... Pre-university education . ... Facilities and equipment . ... SSAU History . SSAU roadmap . ... Contacts . ... The scientists of Samara State Aerospace University have completed dynamic tests of the first Russian university nanosatellite SamSat-218D created by SSAU students. ... It has already passed the whole set of tests and transferred to the Rocket and Space Centre Progress . ... The whole test cycle of the nanosatellite SamSat-218D (Module Contact-Nanosatellite") will be completed in July. ...

... Astrophysics Group . ... Pulsars . ... Stars ? ... The array was designed to detect compact radio sources such as these by virtue of the fact that they would scintillate (twinkle) when observed from the Earth through the interplanetary medium ? ... One of Antony Hewish?s research students, Jocelyn Bell, was set the task of operating the telescope and inspecting the daily charts for the kind deflections in the trace which occurred when a scintillating source passed over the array. ...

... Experiments with beams of negative particles were performed in Britain by Joseph John ("J.J.") Thomson, and led to his conclusion in 1897 that they consisted of lightweight particles with a negative electric charge, nowadays known as electrons. ... J. J. Thomson. ... To mark the 100th anniversary of the discovery of the electron, the Center for History of Physics of the American Institute of Physics has created on the world wide web a suitable exhibit: http://www.aip.org/history/electron . ...

. Next: FSRQs Up: THE DEEP X-RAY RADIO Previous: Redshift Distribution . DXRBS' unique combination of a dual X-ray/radio survey method and high sensitivity has opened up important, large new regions of parameter space for both blazar sub-classes, within which a large fraction of our sample (nearly 50%) lie. This section is devoted to discussing these discoveries and their impact upon our understanding of the blazar class. љ . FSRQs . BL Lacs . Paolo Padovani . 1/5/1998

The AstroGuide . ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Discovery Telescopes, Inc. has been manufacturing precision astronomical components since its inception in 1991. ... 949) 347-0142 . ... Web Site . http://www.discovery-telescopes.com/ . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

... Posts tagged ?incompleteness? ... Comment . ... The notions of missing data are overall different between two communities. ... Astronomers?I?m not sure how they think but my impression so far is that a missing value in one attribute/variable from a object/observation/informant, all other attributes related to that object become useless because that object is not considered in scientific data analysis or model evaluation process. ... 2 Comments . ... Entries RSS . ... Entries (RSS) and Comments (RSS)...

Filename completion is only available if the the environment variables EDITOR and/or VISUAL are set to either emacs , gmacs or vi . For example: EDITOR=emacs . ... To complete a file or directory name with emacs or gmacs set press the ESC key twice. ls -l on<ESC><ESC> line_help . If the filename is not completed enter more characters until the filename can be uniquely identified. ... To complete a file or directory name with vi set press the \ (backward slash) key. ls -l on\ line_help . ...

mirroring wdcmirror ( ftp.wdc.com :/ drivers / hdutil ) completed successfully @ Thu Feb 27 00:45:37 MSK 1997 mirroring wdcmirror ( ftp.wdc.com :/ drivers / hdutil ) completed successfully @ Sun Mar 16 16:18:45 MSK 1997 Got INDEX.TXT 1613 Got allstar.exe 220223 Got wdatide.exe 72687 Got wd_diag.exe 60960 Got wd_clear.exe 54968 Got coretst.exe 33949 ...

... The one year crew. (image credit: NASA/Bill Stafford) . The тАЬOne Year CrewтАЭ has specific objectives to their mission all in a bid to find out if the human body and mind is capable of long missions to an asteroid, back to the Moon or even to Mars in the future. ... On-board the Russian space station Mir four cosmonauts clocked up more than a year in space in the 1980s and 1990s.€а (1942-) has the record for the longest single space flight of 437 days or 14 months in space in 1995. ...

GALFA - H I Projects . The table below summarizes approved GALFA H I projects. Some project names link to project web sites. All scheduled project IDs link to the relevant proposal abstract in the telescope schedule database , which also lists scheduled observations for each project. If these exceed the requested observing time, a project is deemed completed ; otherwise, it is either in progress or not yet scheduled , depending on whether observations have begun. ... Goldston . ...