Next: Extraction of Information Up: Image Manipulations Previous: Transformations . ... Basically, it is not possible to retrieve information on features with frequencies higher than the Nyquist frequency (see Equation ). Several different techniques are used depending on the data (see Wells 1980 for a general discussion of the methods). ... Another group of image restoration algorithms use iterative methods to obtain a solution which is consistent with the data. ...

... 145, 1998 R. Albrecht, R. N. Hook and H. A. Bushouse, eds. Recognition of Anomalous Events S. Monai 1 2 1 ,2 and F.Pasian2 Osservatorio Astronomico di Brera Merate, Italy Osservatorio Astronomico di Trieste, Italy Abstract. ... Raw images, as read from a CCD, are often affected by some events which are revealed by anomalous pixel values, i.e., single saturated pixels or pixels at zero intensity (also named hot or bad pixels). ... Recognition of Anomalous Events 77 Figure 1. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2010 June 15 . Starry Night Scavenger Hunt . ... OK, then find, the rings of Supernova 1987A , the Eskimo Nebula , the Crab Nebula , Thor's Helmet , the Cartwheel Galaxy , and the Ant Nebula . ... Then please identify any more hidden images not mentioned here -- and there are several -- on APOD's main discussion board: Starship Asterisk . ...

... Star Atlas . ... Behemoth black hole found in an unlikely place . ... black holes . ... If a supernovaт??s original star is massive enough to form a black hole, why is there any explosion? Why doesnт??t the entire mass of the original star simply fall onto the newly formed black hole and instantly vanish? ... For some massive stars, it may be possible that collapse leads directly to the formation of a black hole with no explosion. ... Get instant access to subscriber content on Astronomy.com! ...

... An error involving a missing tasks parameter indicates that the parameter file may have changed between the last time the task was used and the current version. ... If still in trouble, delete the parameter file in `myiraf/uparm' corresponding to the task (the names are somewhat contrived, but with a bit of imagination it is not too difficult to identify the right one). ... The imcnts task and region masks . ... A region descriptor of the kind: . CIRCLE(403, 403, 22.5) . ... See `help regions'.) ...

... Modelling is the only feasible way of assessing the reliability of the reconstructions. Modelling here refers to the model used to generate a simulated data set, not the implicit modelling performed by the deconvolution algorithms.) ... Model-fit for parameters to the original data if possible. Check that simulated observations can recover the significant features of the model reliably. ... Use simulated observations to determine the effective resolution of the deconvolution sky model. ...

Astronomy Picture of the Day . Mysterious Features on Ganymede . ... 9.12.1997 . ... Credit: The Galileo Project , NASA Explanation: Where is the rest of the circle? Jupiter 's largest moon Ganymede has some truly unusual terrain, including the pictured half circle above cut by nearly parallel curves. ... Also of interest is a dense linear crater chain that cuts across the top of the half-circle. ... 1997 1998 . ... Publications with keywords: Ganymede . Publications with words: Ganymede . ...

... Nashville. ... Is it my fault that I can't reap what I sow? Nashville, did you give me half a chance With your southern style, and your hidden dance away? ... Nashville , I'd like to know your fate I'd like to stay a while But I've seen your lowered states today ( I've seen them today , honey, I swear I've seen them today ) Now I'm leaving - I've got all these debts to pay You know we all have our dues - I'll pay 'em some other place I'd ...

... NEdit scrolls too fast when I extend a selection by dragging the mouse outside of the window. ... I appreciate it, and I think it's kind of neat to have a "bleeding edge" version of NEdit around to try out new features. ... A mini-FAQ is also available. ... If NEdit automatically transferred the selection to the Find or Replace dialog, it would either have to steal the selection, or users would have to click or drag the mouse over the text to delete it before they could type anything different. ...

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... ESO . ... Survey Telescopes . ... ESO Supernova . ... Star Clusters . ... Stars@ESO . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... Future Projects . ... This NASA/ESA Hubble Space Telescope image shows the positions of the past, present and predicted future appearances of the Refsdal supernova behind the galaxy cluster€а MACS J1149+2223 . ...

... European Remote Sensing Satellite (ERS-1) was launched on 17 July 1991, and the follow mission ERS-2 (with the same sensors and an Ozone monitoring instrument added) was launched on 21 April 1995. ... ERS-2 has a fixed repeat cycle of 35 days, and follows ERS-1 tracks with one day's delay. ... Swath width is 102.5 km (telemetered), spatial resolution is about 25x25 m. The Advanced SAR (ASAR) instrument is carried by ESA's ENVISAT satellite launched on 1 March 2002. ... Swath . ... Spatial Resolution...

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

... 1 Piece Allocacoc 5 Outlets PowerCube Socket Original DE Plug Adapter - 16A 250V . ... Features: Creative magic cube design, 5 outlets . ... Package contents: 1 x Allocacoc PowerCube Original Socket, 1 x English User Manual . ...

This document describes changes from the original TCC to version 1.0 of the current TCC. ... The new TCC uses one socket per device (e.g. axis controller or mirror); the old TCC allowed multiple axes to be controlled by one LAT stream. ... The new TCC also communicates with hardware controllers via TCP/IP instead of LAT; this has the potential to reduce the use of terminal servers at APO. ... Set and Show ExpTime . ... Show Database (the new TCC does not use a central repository to store data) . ...

... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . ... In July, 1976, Viking Orbiter 1 was acquiring images of the Cydonia region of Mars as part of the search for potential landing sites for Viking Lander 2. ... Using the height field, it is also possible to view the "Face" from different look directions, by mapping the Viking Orbiter image directly on the the topography and then placing the "viewer" at different locations. ... Mars . ...

... The only event-driven pieces of software were the user interface Hermes, the display server GIDS and the GDS server. ... Event-driven tasks are fundamentally different from procedural tasks. ... Using this event handling, a collection of routines has been built, which allows the programmer to construct a graphical user interface for a task. ... These are the events associated with user input keywords and one other event which is generated when a task is resumed after it was pausing. ...

XmTel is intended for interactive remote telescope operation. ... LX200 ===== XmTel was originally developed control a Meade LX200 16-inch fork-mounted telescope. ... It is essential to have the LX200 hand control initialized for the location and local time, NexStar ======= XmTel supports the Celestron NexStar command sets, including auxiliary commands that access hardware directly. ... XmTel is actively being used and developed with the Celestron Corrected Dall-Kirkham C20 telescope. ...

Nova in M31 2000 3 . ... From Giovanni Sostero (Remanzacco Observatory): at the end we have found a good Nova candidate in the course of our monitoring program in M31. ... Remanzacco Observatory Light curve This is a preliminary lightcurve of Nova M31-3 from the images we collected and those provided by others. ... vsnet-alert 5346 ] [FWD] Suspected Nova in M 31 . ... vsnet-alert 5349 ] (fwd) M31 possible nova . ... vsnet-alert 5355 ] [FWD] New image of the possible Nova in M31 (GSo) . ...

Stellarium 0.12.3 . ... Classes . ... Scripting . ... Scripting Engine . ... Script Console . ... Since version 0.10.1, Stellarium includes a scripting feature based on the Qt Scripting Engine . ... Prior to version 0.10.0, Stellarium used a different scripting engine called StratoScript . ... Prior to version 0.10.0, Stellarium had a simple scripting engine, known as StratoScript . ... This script prints "Hello Universe" in the Script Console output window. core.debug( "Hello Universe" ); . ...

... Recognition of Anomalous Events S. Monai 1,2 and F.Pasian 2 1 Osservatorio Astronomico di Brera Merate, Italy 2 Osservatorio Astronomico di Trieste, Italy Abstract. We present an original algorithm for the recognition of anomalous events in a CCD frame (i.e., cosmic hits, bad pixels etc.) ... Raw images, as read from a CCD, are often a#ected by some events which are revealed by anomalous pixel values, i.e., single saturated pixels or pixels at zero intensity (also named hot or bad pixels). ...