... Data Reduction FAQ > A number of OmegaCAM filters show vignetting in their central regions. What are the causes for this and what are the dimensions of these features? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... A number of OmegaCAM filters are not monolithic, but consist of four segments (each covering 8 detectors) that have a central cross-shaped support structure. ... Filter . ...

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... Three is a magic number. ... You get three as a magic number. ... Give you three. That's a magic number. It takes three legs to make a tri-pod or to make a table stand. ... When it's three you can see it's a magic number. ... Multiply backwards from three times ten.> Three time ten is.. ... Three times nine is.. ... Three times six is 18, three times five is 15 . Three times four is twelve . And three times three is nine and three times two is six. ... Yeah> That's a magic number. ...

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• Naughty Number Nine

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

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• ASP: Making a Rainbow

... NFILTCAR is the logical rather than the physical number of carriers; if two or more filter wheels are encoded as a single character in the data, there is effectively only one filter wheel, as far as data handling is concerned. If one filter mechanism carries chromatic filters and another carries ``neutral'' filters, the total number of bands (i.e., rows) in the table should be the product of the number of positions in the two carriers. ...

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• EBCCD tutorial background
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Why create rough text? ... You get a real "weathered" look to fonts. ... The Typewriter font is a very good one to use; let's make our favorite logo in 80 pixel Typewriter font: . ... The best way to do this is to Spread the pixels out a bit: . ... By using 2 (which looks pretty normal) and using it twice in a row, we get a correct looking effect. ... Well, you're right, of course...we're going to use the newly written plug-in called Threshold to create the right look for our text. ...

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• Hands On; The Button Mask
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... Forum: The Linux Kernel Hackers' Guide . ... Keywords: kernel tuning, file handles, Bus error . ... Increasing number of open file handles in kernel. I have successfully increased the number of files on my system (Linux 2.0.30) by editing the following file: . ... I also increased NR_INODE to 5000, and NR_FILE to 4096. I then rebuilt the Kernel (and modules for good measure) and installed the new image. ... Increasing number of open files parameter by Simon Cooper . ...

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• What is a Device Driver?
• Neptune - Voyager 2
• mod_cache_disk - Apache HTTP Server

Digital FIR Decimating Filter for GALFA Spectrometer Documented by Wonsop Sim, July 30th, 2004 Introduction: The GALFA Spectrometer Board requires a decimating FIR filter to reduce the bandwidth from 100MHz by a factor of fourteen to 7.14MHz. ... A filter with symmetric coefficients can reduce the number of multiplies in half by pre- adding input samples. ... The coefficients have been grouped so that they correspond to the fourteen pre- added input samples that are calculated in a filter section. ...

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• pfb_underflows
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• lowpass digital fitlers

HUBBLE SPACE TELESCOPE DAILY REPORT #868 PERIOD COVERED: 0800 EST Daily Status Report as of 109/1200Z. 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Uplinked Updated Ephemeris Tables, Per MOSES 2871 1.2 Completed PC 4712 (WF/PC Cycle 2 Calibration: Measles Monitor) The Planetary Camera was used to make Earth calibration flat images with filter F517N, both with and without filter F122M. These images are to be used to monitor the appearance and number of measles (i.e., contamination marks). ...

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• Charge Transfer Efficiency
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... Do not warn when variables are not explicitly declared. ... Do not check if a variable has been initialized before being used. If a variable is not in a DATA, COMMON, PARAMETER or SAVE statement, and if it is not a dummy subroutine argument, then Flint normally attempts to check that the variable is initialized before it is used. ... By default Flint warns if subroutine or variable names are longer than 8 characters, or if they contain underline or dollar characters. ...

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• Making a Fake Observation
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Astronomy Discussion Forums . Forums: . ... How Do You Feel About Numbers? ... Post Message | ... Posted by Richard D. Stafford, Ph.D. on September 15, 2002 16:22:25 UTC . ... Wait - harvey1 - September 15, 2002 - 22:20 UTC . I don't follow you! - doctordick - September 16, 2002 - 14:59 UTC . ... 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" . ...

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• Nothing? Beyond Numbers... - an Astronomy Net God Science Forum Message
• A Number Is A Very Specific Thing - an Astronomy Net Exploration Forum Message
• The Telescope's F/number - an Astronomy Net General Forum Message

... Formulas are very similar to equations. Consider for now only equations with one unknown variable , denoted by some letter, which can be x but can also be different. An equation is an equality between two mathematical expressions containing the unknown number (maybe in several places), as well as other numbers which are known. ... For instance--if you multiply two sides of a formula by the same number, the result is still a valid formula, even if what you multiply contains unknown numbers. ...

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• Elements of Algebra
• Identities
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... you can allocate fewer colors from the default map for each application . ... Prior to 1.7, SAOtng took the latter route. ... In this case, a full specification of how to use the default colormap can be made by means of a bracket syntax: default[n:m,name] where "n" is the minimum number of colors that must be allocated or else a private map called "name" is used. ... By default, Netscape will take all of the colors, and SAOtng will have to use a private map. ... The more colors ! ...

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• Who is tweeting about #AAS225
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• Warranty checking script for OS X

This directory contains prototypes for scripts that may be called by the camera driver. ... The script set_camera_filter should take a filter number as an argument and send a command to a filter wheel. The SBIG filter wheel is supported internally and does not use this script. If you have another filter wheel, then a script such as this would allow you to use XmCCD to control the filter wheel. ... Simply "make" the routine in the ifw directory, and then "make install". ...

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• http://www.astro.louisville.edu/software/sbig/archive/xmccd-4.1/xmccd-4.1e/scripts/README
• http://www.astro.louisville.edu/software/sbig/archive/xmccd-4.1/xmccd-4.1e/prefs/README
• http://www.astro.louisville.edu/software/sbig/xmccd-5.1/CCDCOMMANDLIST

... Watchouts . Help . ... In order to make rgsproc gui more friendly, there has been a change in the "entrystage" and "finalstage" parameters. ... So, if the user wants to specify a different "entrystage" or "finalstage" parameter value, the rgsproc command should looks like this: . rgsproc entrystage=1:events finalstage=4:spectra withinstexpids=no instexpids='' orders='1 2' etc.. Pages maintained by SAS librarian . Any question about SAS should be addressed to the XMM-Newton help desk . ...

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• SAS Packages
• Description

... Some equations, identities or formulas contain small quantities , and these can be made much simpler and easier to use by sacrificing a little accuracy. ... When we derive squares, 3rd powers, 4th powers etc. of numbers larger than 1 , the results are always bigger , while for numbers smaller than 1 , the results are always smaller . ... power . ... number . ... The above also holds for negative numbers, if one understands "bigger" and "smaller" to refer to the absolute value (the value without sign...

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• Elements of Algebra
• Formulas
• Vectors

... First Name: Middle: Last Name: . ... Contact Email: . ... Each year, we publish our membership list with the name, city, email and home phone number of each opt-in member and distribute the list to the club membership. ... Display your name in the club list: . ... Display your phone number in the club list: . ... Display your email in the club list: . ... Display your city in the club list: . ... Sky Telescope Magazine ($32.95 for one year) . ... Copyright (c) Amateur Telescope Makers of Boston, Inc...

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SiD Tracking using VXD Nick Sinev, University of Oregon Plan Motivation Track reconstruction algorithm Performance for single tracks Does it have any limits ? With backgrounds To do Motivation Tracking in SiD is a challenge, especially pattern recognition. ... Limitations caused by reconstruction speed consideration In the presence of high number of background hits, number of 3-point combinations used as track seed became enormous if we consider all combinations. ...

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• Intelligent Life in the Universe
• Means and Deviations
• QSO Absorption Lines and Other Cosmological Probes

... Organisers: Michel Balazard (CNRS, Laboratoire Poncelet) , Xavier Caruso (CNRS, Laboratoire Poncelet) , Michael Tsfasman (CNRS, Laboratoire Poncelet, Institute for Information Transmission Problems) , Alexey Zykin (Laboratoire Poncelet, State University Higher School of Economics) . ... Number theory seminar . ... One of the goals of the semester is to convey the essential unity of the subject, especially to young mathematicians who use number theory in their research. ...

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• Conference "Algebraic Geometry and Number Theory"
• The field of p-adic numbers and its finite extensions (Spring 2010)
• Algebraic Number Theory

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... 2/3-m Telescope . ... Site . ... Commanding . ... In a typical robotic observing scenario, each afternoon, a telescope control computer obtains a set of objects to observe from its home institution from a command or script file. ... The file is then transferred to the telescope control computer at the Winer Observatory in Sonoita. ... The Iowa control computer then begins processing the telrun.sls file. ... 2013 Winer Observatory. ...

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• Winer Observatory
• Mark 2 Consciousness
• The Problem of Consciousness

Images taken by 2002-2003 RSAA Summer Scholars on the SSO 40 inch telescope on Wed 15 Jan 2003 and Thur 16 Jan 2003 . With each image is the objects identifying number, what the object is (usually obvious) and what constellation it is located in. ... Most of the images are greyscale and were taken without the use of filters. The exception is NGC 3132 Planetary Nebula in Vela which was taken with B, V and R filters and these images combined to make a colour image. ...

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• Mach-numbers in a simulation of convection in the sub-giant Eta Boo
• Magnitudes
• Data Handling Video Tutorials