... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

... WFPC2 Home . ... Warm Pixels . ... degrees) Center_Pattern: ? ... The default WFPC2-LINE pattern produces a shift of 2.5 x 2.5 pixels on the WF chips, and 5.5 x 5.5 pixels on the PC chip: Pattern_Number: 10 Pattern_Type: WFPC2-LINE Pattern_Purpose: DITHER Number_Of_Points: 2 Point_Spacing: 0.353 Coordinate_Frame: POS-TARG Pattern_Orient: 45 Center_Pattern: NO POS TARG equivalent: 0.000, 0.000 0.249, 0.249 . ... Figure 1: The small-scale WFPC2 dither patterns, relative to WF chip pixels. ...

... Today this year's largest group of sunspots will cross the Sun's central meridian. ... The next day, the number of spots in the group reached five, and the day after, on June 2nd, it was possible to count thirteen sunspots on solar disk, which had been clear prior to this. ... This year's two most powerful active areas, which passed across the solar disk at the beginning of May, 2009, are set to appear in the Sun's eastern sector in two days, on June 6th. ...

... CORCHAN(1) specifies the number of spectral channels per baseband channel (one polarization component) that the correlator will write. CORCHAN(2) specifies the number of channels to use in the internal FFT in the correlator. ... Over averaging can cause loss of amplitude due to ``delay smearing'' -- the effect of large phase slopes across the channels going into an average. ... But excessive numbers of channels lead to excessive output data rates and data set sizes. ...

When using a large number of Virtual Hosts, Apache may run out of available file descriptors (sometimes called file handles if each Virtual Host specifies different log files. ... Unix operating systems limit the number of file descriptors that may be used by a process; the limit is typically 64, and may usually be increased up to a large hard-limit. ... If you system falls into 1 or 2 (above), then increase the file descriptor limit before starting Apache, using a script like #!/bin/sh . ...

... Hardware Platform Hardware Platform IBM Cyclops System: · Very Dense Multi- Node HPC system · 3D grid configuration · Max size 24X24X24 nodes · Each node consisting of one multi-processor Cyclops chip · Each Cyclops Device contains 80 Dual Thread Unit Processing Elements, Dual ALU single FPMAC unit The Cyclops Processor Device Simplified Cyclops Diagram Cyclops Capabilities · 500 MHz system clock frequency · 80 GFLOPS peak ...

... Behemoth black hole found in an unlikely place . ... black holes . ... Observing springtime deep-sky objects with a large telescope . ... Could large numbers of black holes account for much of the "dark matter" estimated to exist in our universe? ... NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University) No, because the universe never had the raw material to grow enough black holes to account for current estimates of dark matter. Get instant access to subscriber content on Astronomy.com! ...

... The tension in members of the telescope changes as we move the dome, ch, azimuth, and tiedown tensions. The lifetime of a beam is counted in the number of times the change in tension goes through a cycle. ... Examples of telescope motion with corresponding unbalanced moment. ... The number of cycles were computed for : 5000, 10000, 15000, 20000 kipFeet momemnt change. ... The number of cycles on the telescope was computed using the change in the unbalanced moment (at a corner). ... cycles . ...