... The earliest X--ray observations were carried out in the mid--1970s. X--ray luminosities of order L erg/sec were detected in the 2-11 keV range in the direction of the Orion star forming region. ... These observations showed that the O and B stars were the brightest X--ray sources, and that TTs were also associated with emission. Feigelson and Kriss (1981) showed that some of the X--ray sources were associated with PMS stars which had not been previously detected which H surveys. ...

... We present the ROSAT All-Sky Survey Bright Source Catalogue (RASS-BSC, revision 1RXS) derived from the all-sky survey performed during the first half year of the ROSAT mission in 1990/91. 18,811 sources are catalogued, with a limiting ROSAT PSPC countrate of 0.05 cts/s in the 0.1-2.4 keV energy band. ... Broad band images are available for a subset of the flagged sources. ... Retrieving the full catalogue The ROSAT All-Sky Survey Bright Source Catalogue can be retrieved via your WWW browser: 1. ...

Astrophotography Forum Message . Forums: . ... Astrophotography Questions, ETX 125 . ... I know this isn't the best camera for Astrophotography, but I do know that it will work. ... The next thing I need is a telescope. ... I'm really wanting to buy a telescope and would like to start astrophotography. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... These Facts and Questions pages mainly tell you how to use the Aberrator-interface and also explain the nature of the aberrations. ... Airy disc: the brightest spot of light when you look at a star in focus. This disc can contain a maximum of 84% of all the light that arrives from a star (perfect refractor telescope). MCT : Maksutov-Cassegrain telescope. A closed-tube mirror-telescope with a secondary obstruction. Less common than the SCT, this telescope uses a corrector (real glass). ...

... Contacting and discussing with people sharing your interests, participating in night sky observations with telescopes as well as a large choice of astronomical books, magazines and video-tapes out of our club library. ... A reasonable compromise for observing both planets and brightest deep sky objects ( nebulae, galaxies) are either a 4 to 8 inch mirror telescope ( Newton, Schmidt-Cassegrain ) or a 3 to 4 inch refracting ( lens) telescope. ... Where can I buy a telescope in Luxembourg ? ...

... In this case you have to write in your answer (in English or Russian): «impossible situation ­ ». ... Data from the tables (Planetary data, stars, constants, etc.) may be used for solving every problem. ... Great oppositions. ... Proxima Centauri. ... Argali. ... Will Argali see the stars of this constellation in the sky tonight? («-yes» «-no»). At what time (Kyrgyz time) and at what altitude the brightest star of this constellation will culminate during the nearest day or night? ...

... The main field of my investigations is stellar spectrophotometry. As a result of scientific activity of our group spectrophotometric catalog was created including energy distribution data on 900 stars in the range 3200-7600AA and 250 stars in the range 6000-10800AA (Voloshina et al., Spectrophotometry of Bright Stars, ed. I.N.Glushneva, 1982, Moscow, Nauka, in Russian). ...

... Visible Distribution of Galaxies. ... Features of Elliptical, Lens-Shaped, Spiral and Irregular Galaxies. Galaxies with Bar. ... Distribution of Surface Brightness of Surface and Spiral Galaxies. ... Color Characteristics of Galaxies. ... Methods of Galaxies' Mass Determination. ... Hidden Mass of Spiral Galaxies. ... Features of Dark Matter Distribution in E and SO Galaxies. ... The Whole Number of Galaxies and Their Density by the Results of Observation on the 'Hubble' Space Telescope. ...

Next: Gravitational Wave Background from Previous: Galactic Gravitational Wave Background . ... It is intuitively clear that at frequencies above the critical ones for our Galaxy, one will detect rare bright jerks produced by coalescing white dwarfs   (at a rate of 1 per 100 year) and NS (at a rate of 1 per - year) in our Galaxy, against a background of the extragalactic stochastic GW. ... Firstly we consider GWB from close individual galaxies, and then will discuss overall extragalactic GWB. ...

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

Next: The command line interface (TEXT CEILIDH ONLY) Up: Using Ceilidh as a Student Previous: Interpreted language exercises . ... For Question/Answer exercises you are given the following menu. Question/answer exercise menu for course "tst" unit "1" exercise "qu": vq view questions | pq print questions ans answer questions and submit | cks check submitted h help | ... To quit the exercise before answering all the questions type q as your answer. cks . ...

... Ace the GMAT(R) with the only official study guide from the creators of the exam With 25% brand new content, The Official Guide for the GMAT Review 2016 delivers more than 900 retired questions from the official GMAT(R) exam, complete with answer explanations and a 100-question diagnostic exam to help focus your test preparation efforts. ...

The Mission U.K.- Severina =========================== From the Album Gods Own Medicine Lyrics in {} are questionable Corrections, questions: d_caldwell@qlc.com (David Caldwell) --------- She's got her head in the clouds She's got the stars in her eyes She's dancing with a dream in her heart She's got the wind in her hair Moonchild shining bright And she's dancing , with a dream in her ... Severina! ... She's a gift to the gods and shes dancing Severina! ...

... HELD BETWEEN THE FIRST VISITING CREW (VC-1) AND JOURNALISTS . ... question to Tito): . You stated that you intend to go into business in space tourism. ... D. Tito: . ... Question to Tito): . ... Question to the combined crew): . ... As to any new cosmonaut we should explain certain things which a person cannot feel on the ground. ... All crew members treat me well and do everything so that I feel well aboard the International Space Station. ... Official WEB-site of S.P.Korolev RSC Energia . ...

... NASA U.S. Spacesuit Knowledge Capture . ... During the program?s existence, more than 65 seminars have captured spacesuit history and knowledge; those that are available at this site have been approved for public release. For questions about the program or presentations, please contact: cinda.chullen-1@nasa.gov or vladenka.r.oliva@nasa.gov . The following presentations consist of video recordings (MPEG-4 and Ogg), transcripts (TXT),and accompanying slides and/or information (PDF). ...

. Comment on J0405+3803 . Our image contains a feature of 25 mJy at 14 mas E-NE from the brightest component. It is not visible in the Caltech-Jodrell (CJ) survey image at 5 GHz (Xu et al. 1995) obtained about 6 years earlier. The 1.6 GHz CJ image (Polatidis et al. 1995) does show an extended feature close to the position in question, but somewhat displaced toward west. VLBApls home page . Last modified: 16 Oct 2000

... Events . Gallery . ... I capture this in Boston at the middle night of 2013.8.15. The mag is increase to apporx 4.5 that time. Using QHY5L-II-Mono CMOS camera and Orion 8inchF3.9 exposure time 5sec*12frames . Submitted by Hongyun Qiu on 08/16/2013 17:12:53 . Picture Galleries . Astronomy Galleries . Club Events . Other Galleries . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Данный дистанционный консультационный пункт по математике закрыт. ... По-русски вопросы по математике обсуждаются в newsgroup под названием fido7.ru.math. ... Google Answers : форум вопросов и ответов на самые разные темы, в том числе и по математике. Сервис платный (при приеме вопроса посетителя просят внести сумму денег, которая возвращается, если вопрос остается без ответа), но можно как минимум почитать архив вопросов и ответов. На прощание оставляем вам архив старых вопросов и ответов . ...

... Meta Index / Home Page / Source Flagging Algorithms Any source either having a raw count-rate >= 80, or with quality flag bit 4 set (mod-8 pattern) is checked for "close" neighbours, which may be flagged. ... Check each source in the vicinity of the bright source . ... Compute the maximum distance for flagging the source from maxRad = max(exclusionradius, min(70.0, 35.0 * countTable(i) // 80.0) ) If the flagging is done by omdetect, the exclusion radius is determined from the algorithm at the end . ...

... Астрософт (Модератор: tlgleonid ) > . UCAC2 Bright Star Supplement для Cartes du Ciel . ... Астрософт . ... Cartes du Ciel - Sky Charts . ... 08 Август 2008, 14:04:19 ? Также готов каталог I/294 The UCAC2 Bright Star Supplement (Urban+, 2004), являющийся северным дополнением к каталогу I/289 The UCAC2 Catalogue(Zacharias+ 2003). ... Ответ #1 : 08 Август 2008, 14:41:20 ? ... Самая слабая звезда в каталоге UCAC2 Bright Star Supplement - это 2UCA 50406212 Vmag: 15.19 в Малой Медведице. ...