Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

Astronomy Picture of the Day . A Hole in Mars . ... 18.07.2012 . ... Credit Copyright: NASA , JPL , U. Arizona Explanation: What created this unusual hole in Mars? ... The hole appears to be an opening to an underground cavern, partly illuminated on the image right. ... Why there is a circular crater surrounding this hole remains a topic of speculation , as is the full extent of the underlying cavern. ... Publications with keywords: Mars . ... Curiosity on Mars: A Wall of Gale Crater . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 July 18 . A Hole in Mars . Image Credit: NASA , JPL , U. Arizona . Explanation: What created this unusual hole in Mars? ... The hole appears to be an opening to an underground cavern, partly illuminated on the image right. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

... What work is currently being done to improve the flux calibration accuracy for echelle modes? ... Starting early in Cycle 11, monthly offsetting for echelle modes was turned off to minimize these types of calibration problems. ... We are currently working on redetermining the echelle flux calibration so that it is self-consistent with the 2-D scattered light algorithm. Time dependence of the sensitivity - Sensitivity-monitor data for the echelle modes are currently under investigation. ...

... Users . ... Data Collection and Analysis . ... This particular part of the analysis has been disabled since the code is struggling to cope with the number of users seen this year, in particular the large contingent of people who have re-tweeted NASA. ... Order accounts: by user number (effectively random) by number of tweets (includes retweets) by number of followers by number of followers that also tweeted about AAS225 by number of friends that also tweeted about AAS225 . ... by user number . ...

As noted earlier Kristian Birkeland, reporting in 1903 on his expeditions to the auroral zone, proposed that magnetic disturbances accompanying the aurora were caused by large electric currents flowing down the length of auroral formations. ... Some scientists disagreed with Birkeland and claimed the electrojets did not connect to space but instead their entire circuit lay inside the ionosphere, like that of other ionospheric currents known at the time, believed to be caused by atmospheric tides. ...

... Files in red?history) . ... Auroral Currents . 25H. Birkeland Currents . ... As noted earlier Kristian Birkeland, reporting in 1903 on his expeditions to the auroral zone, proposed that magnetic disturbances accompanying the aurora were caused by large electric currents flowing down the length of auroral formations. ... In later years these currents became known as the auroral electrojets , and considerable debate ranged over their cause and the way their circuit might be completed. ...

. The following is a list of the currently installed versions of the CIMA. The links refer to the CIMA version log page . Normal: version 3.0 - this is the next version of CIMA which has become the new default version --- NOTE that this version uses a new syntax for command file observations, uses new configuration files and needs source files with full velocity information . Old: version 2.2 - this is the old version of CIMA You can return to the main CIMA page by clicking here .

... The ESO ADS mirror site is currently unavailable. ... Please use one of the ADS sites listed below. Harvard-Smithsonian Center for Astrophysics, Cambridge, USA . ... European Southern Observatory, Garching, Germany . National Astronomical Observatory, Tokyo, Japan . ... Beijing Astronomical Observatory, Beijing, China . Inter-University Centre for Astronomy and Astrophysics, Pune, India . ... Korea Astronomy Observatory . Send comments to <webmaster@eso.org> . ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Current telescope status . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... Here we address the issue of how to determine what calibration files make up the current calibration file for a given observation time. Each calibration file has a validity start date and a validity end date. ... In the simplest case (no end of validity date), a new version of the calibration file -- call it , will have and (figure 1 ). ... Within this scheme, at any time the applicable issue of the calibration file is obtained by selecting among all files the one with the higher issue number. ...

. Other Relevant Links . Number counts have been illustrated earlier in the talk. QSO Clustering and Large-Scale Structure , Scott Croom et al . QSO Evolution and the Luminosity Function , B.J. Boyle et al . | Front page | . | << - Contamination | QSO close pairs - >> | . Robert J. Smith, ">rsmith@mso.anu.edu.au Last modified: Fri Sep 24 11:39:02 EST 1999 .

... Corporate Partners Rock Our Cosmos! Current Partners . ... In addition to Sky & Telescope and SkyandTelescope.com, the comany publishes Night Sky, a bimonthly magazine for beginning astronomers, an annual magazine called SkyWatch, an annual magazine called Beautiful Universe, as well as books, star atlases, posters, prints, globes, and other fine astronomy products. ... We thank our Corporate Affiliates for their annual investment in partnering with the ASP to improve astronomy education. ...

... 23 September 2004 - Telescope First Light! ... 30 July 2004 . ... NIC-FPS is an instrument combining the capabilities of a near-infrared imaging camera with a cryogenic Fabry-Perot etalon currently under development at the Center for Space Astrophysics and Space Astronomy , University of Colorado with support from Rice University , Ball Aerospace and the Astrophysical Research Consortium. It is scheduled to begin operations on the ARC 3.5m telescope at Apache Point Observatory in 2004. ...

Using a combination of instruments on ESO's Very Large Telescope, astronomers have discovered the most massive stars to date, some weighing at birth more than 300 times the mass of the Sun, or twice as much as the currently accepted limit of 150 solar masses. The most extreme of these stars was found in the cluster R136 in the Tarantula Nebula. Named R136a1, it is found to have a current mass of 265 times that of the Sun. ...

... The star formation rate (SFR) of the current SF episode can be estimated from the total H luminosity. ... For the derived total flux F (H )=5.8 erg s -1 cm -2 we obtain a total H luminosity of 10 39 erg s -1 . ... The total mass of ionized gas can be obtained from the average mass density inside the H II region and its volume. An average mass density corresponding to the average electron density of 1 cm -3 within a volume with a diameter of 0.5 kpc yields a total ionized gas mass of 10 6 . ...

... What is the configuration of the device driver software? ... If the software you use doesn't adequately tell you what's wrong (or automatically configure it correctly) then you need to investigate how your hardware devices and their drivers are configured. ... Another problem is that when you view configuration messages on the screen, it's sometimes not clear whether the reported configuration is that of the device driver, the device hardware, or both. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . This year's annual Geminid meteor shower is active during the period December 7 - 17, with the peak of activity occurring during the night of December 13th/14th. The Geminid shower is currently one of the best of the major annual meteor displays, usually having a high number of relatively bright, medium-speed (130,000 km per hour) shooting stars. ... Last Revised: 2009 December 7th . ...

. Latest HI Rez Visible Satellite Image . IR Enhanced Image of the PNW . (not always available - sorry) . 500 MB surface and the water vapor distribution: . Surface Pressures: . Extreme precipitation in 1995 and 1996 . Temperatures: Jan-Feb , Mar-Apr , May-Jun , July-August , Sept-Oct, Nov-Dec . Precipitation: Jan-Feb , Mar-Apr , May-Jun, July-Aug , Sept-Oct, Nov-Dec . Annual Precipitation Trends . The Electronic Universe Project e-mail: nuts@moo.uoregon.edu

... Astrophysics Group . ... COAST . COAST Current Status . ... COAST File Archive . ... Fringes and Power Spectra from COAST . ... The first stellar fringes were obtained in June 1991. ... We obtained sufficient data to reconstruct the first infrared image from an aperture synthesis array. ... The North telescope of the COAST array was moved to a new foundation, further to the North, making the longest baseline 67 metres. ... A fifth telescope was sited on the Southwest arm of the COAST array. ...