... 2009 September 21 . Abell 370: Galaxy Cluster Gravitational Lens . ... While imaging the cluster of galaxies Abell 370, astronomers had noted an unusual arc to the right of many cluster galaxies. ... In the mid-1980s, however, better images allowed astronomers to identify the arc as a prototype of a new kind of astrophysical phenomenon -- the gravitational lens effect of entire cluster of galaxies on background galaxies. ... About APOD | ...

Most of these images were obtained by Mike Bessell, Michelle Buxton, Hwankyung Sung, Ralph Sutherland and Bob Watson at SSO using a 2Kx2K Site CCD behind a Nikon or Hasselblad lens or directly on the 1m telescope. A few images are from the Hubble Space Telescope. Some of the M42 images were obtained with the KPNO 1m and ESO NTT telescope. One image is a mosaic of IRAS images. ... Details of the CCD imaging program at MSSSO. ... antenna.jpg (53KB) . ... ngc6744.jpg (59KB) . ...

... While imaging the cluster of galaxies Abell 370, astronomers had noted an unusual arc to the right of many cluster galaxies. ... In the mid-1980s, however, better images allowed astronomers to identify the arc as a prototype of a new kind of astrophysical phenomenon -- the gravitational lens effect of entire cluster of galaxies on background galaxies. ... In mid-July, astronomers used the just-upgraded Hubble Space Telescope to image Abell 370 and its gravitational lens images in unprecedented...

This is how a typical dispersion modeling result looks when shown as a map. ... Their numerical values are shown at the top. White normally means no data, but high values may be also shown as white if above the fixed high limit (that is, if no automatic normalization is used for colors). Note that calculations were done both for cell positions and for station positions, so both are colored. PO territories are filled by color corresponding to the average value of cells overlaying them. ...

The two insets are Hubble Space Telescope images of a normal dwarf galaxy (upper left) and a recently discovered ultra-compact dwarf galaxy (lower right). ... The background shows the Fornax galaxy cluster, where seven ultra-compact dwarf galaxies have been found. Background: Arna Karick (University of Melbourne), Michigan Curtis Schmidt Telescope; Insets: HST ...

... We have simulated the observations of a very distant cluster of galaxies at high redshift. ... The simulations are made for the HST instruments FOC, WFPC II, and the Advanced Camera, and for an 8-m telescope on the ground equipped with adaptive optics. ... A comparison of the fields of view of post-COSTAR HST imaging instruments with the Advanced Camera (AC) and the ground-based adaptive optics camera (AO) is shown in Fig. 1 superimposed on the noise-free cluster simulation. ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to E-ELT Armazones . ... Survey Telescopes . ... Galaxy Clusters . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... Catch a Star 2013 . Catch a Star 2011 . ... The star cluster, known as NGC 3293, would have been just a cloud of gas and dust itself about ten million years ago, but as stars began to form it became the bright group we see here. ...

... DP = dirty picture Dust specks or dirt are evident on the finding chart. ... Identifications Within 2 Arcmin of Known Clusters of Galaxies The letter preceding the cluster catalog number: a = Abell Cluster z = Zwicky Cluster The notations following the catalog number: cc = at cluster center nc = not at cluster center mc = near cluster center ni = not identified with probable cluster member c: = cluster not obvious on finding chart ef = identification is EF (empty ...

... Deep ATCA imaging identifies a new black hole candidate in the globular cluster 47 Tucanae . ... Recent observational and theoretical work has suggested that stellar-mass black holes may exist in globular clusters, in contrast to previous theoretical predictions that they should be expelled via mutual gravitational interactions early in the lifetime of a cluster. ... 47 Tuc X9 is shown in purple, lying within the scatter of the black hole correlation. ... today * ATNF | ... ATCA | ...

... STScI-PRC00-08 HUBBLE OPENS ITS EYE ON THE UNIVERSE AND CAPTURES A COSMIC MAGNIFYING GLASS Scanning the heavens for the first time since the successful December 1999 servicing mission, NASA's Hubble Space Telescope has imaged a giant, cosmic magnifying glass, a massive cluster of galaxies called Abell 2218. ... The cluster is so massive that its enormous gravitational field deflects light rays passing through it, much as an optical lens bends light to form an image. ... Blue pinpoints hot young...

http://hea-www.harvard.edu/AstroStat/slog/2008/the-big-picture/ Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders Fri, 01 Jun 2012 18:47:52 +0000 hourly 1 http://wordpress.org/?v=3.4 http://hea-www.harvard.edu/AstroStat/slog/2008/the-big-picture/comment-page-1/#comment-796 aneta Tue, 14 Oct 2008 00:30:46 +0000 http://hea-www.harvard.edu/AstroStat/slog/?p=1044#comment-796 Thanks Vinay for posting these images. ...

... Large . ... Normal . ... Thumbnails . ... Enter: Large | ... Contents with thumbnails: Large | ... Florence streets . ... Rome. ... Sunday, 12 September. ... Monday, 13 September. ... Tuesday, 14 September. ... Wednesday, 15 September. ... Thuesday, 16 September. ... Friday, 17 September. ... Saturday, 18 September. ... There's also index of the complete set of photos with thumbnails. ... return to photo album contents | ...

... We can help students grasp the significance of Hubble's extremely keen eye, and learn a bit about angles and math in the process, with the following in-class activity. ... Looking through binoculars or telescopes allows us to magnify a small section of the sky. To measure sizes or distances in that small section, astronomers divide a degree into 60 smaller pieces called arcminutes, and further subdivide minutes into 60 smaller sections called arcseconds. ... 30 feet = . ... 36 seconds . ...

. Subdwarfs . Metal deficient red giants in galactic field . Red horizontal branch stars . Blue horizontal branch stars . Extended horizontal branch stars . Stars inside globular clusters . W Vir type stars . IRAS-sources identified with peculiar supergiants . RCrB type stars . Sakurai's object . peculiar supergiant FG Sge .

... Next: An IRAF-Independent Interface Up: Software Systems Previous: A New PROS . ... We present a high-level representation of the packages and tasks within IRAF/PROS. ... We have produced a high-level overview of PROS. ... The incremental stages were the short-term goals: a project overview diagram (i.e., an organizational diagram of software modules); high-level diagram (i.e., a bubble diagram of each module in the system); and unifying element tables (i.e., tables of task vs. software attributes)....

... the shutters, loads . ... We have shutter/receiver protection to protect the receivers when we transmit with one of our transmitters (sband,430, hf). ... this is also controlled by the 430 ch load/antenna switch. closed always wins . ... shutter - open,close, or query the receiver/radar shutters . ... When the 430 dome is being used, we want to close all shutters, but leave the 430 dome receiver under control of the ch load/antenna switch (above the oscilloscopes in receiver room). ... shutter close...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... Monthly Sky Notes . ... By admin October 1, 2010 Posted in: Stars . A sky of blazing stars (Image Credit: NASA/ESA) . Imagine that once the Sun sets, rather than a dark sky sprinkled with a few thousand dim stars, we had a sky blazing with ten thousand or so stars blazing brighter than Venus. ... Planets orbiting stars in the NGC 3603 Young Cluster would experience just such a sky. ...

Chandra X-Ray Observatory CXC 1. ... BI CCD CTI Correction for ACIS Paul Plucinsky, Dan Dewey, & Joseph DePasquale 1 Paul Plucinsky EPIC Cal October 2006 Chandra X-Ray Observatory Gratuitous Pretty Pictures of E0102 S3 Summed Data ~100 ks CXC RGS Spectrum (Pollock 2006) Objective: develop a spectral model which can be used by RGS, HETG, EPIC & ACIS, etc. Paul Plucinsky 2 EPIC Cal October 2006 Chandra X-Ray Observatory What's New Since the Iceland 2006 Meeting? ...

Full-Text Search . ... arXiv.org . astro-ph . ... SAI VO . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... 1] oai:arXiv.org:astro-ph/9507093 [ pdf ] - 93031 . Beltrami Equation and Cluster Lensing: Characteristic Equations and Applications . ... Submitted: 1995-07-24 . Arclets in clusters of galaxies can be used to determine the lens mapping and not only to constrain the mass density of the cluster. ... SAI MSU . ...

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...