... HST . When using the WWW Exposure Time Calculator for polarimetry, what is the source flux I have to input? ... HST Overview . ... STScI Acronym List When using the WWW Exposure Time Calculator for polarimetry, what is the source flux I have to input? The TOTAL source flux can be input in the Exposure Time Calculator. The Calculator takes care of using only half of the input flux for estimates of the exposure time with the polarizers, which is correct for an unpolarized source. ...

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• generate_ramp.pro (JWST Pipeline routines in IDL)
• Exposure Time Estimation
• The Document Resources of Purple Mountain Observatory Library

Next: *timsort* Up: Timing Analysis Previous: Summary of tasks in . ... Events will be time ordered in the output file. xt> timsort xdata$snr psr ``c 503 513 24'' none A light curve is then generated and plotted so we can inspect the gross properties of the sample (the sequence of good-data intervals and gaps) and any source variability. xt> ltcurv psr none psr 500 xt> ltcplot psr_ltc Finding this sample satisfactory, we search for periodicity with a fast Fourier transform. ...

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• Time Warp - Links
• Timing Analysis
• *vartst* - Test for Source Variability

... Visited 5951 times - Selected 51 months ago . ... Visited 5109 times - Selected 51 months ago . ... Visited 3876 times - Selected 51 months ago . ... Visited 4204 times - Selected 51 months ago . ... Visited 6381 times - Selected 51 months ago . ... Visited 3934 times - Selected 51 months ago . ... Visited 6470 times - Selected 51 months ago . ... Visited 3803 times - Selected 51 months ago . ... Visited 7181 times - Selected 51 months ago . ... Visited 5314 times - Selected 51 months ago . ...

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... AstroGrid Registry . AstroGrid . 1.Home . 2.Admin Home . ... 1.Submit new resource . 2.Low Level(XML) Submit Resource . ... 3.Get/Find New Registries . 4.Manage New Authority . 5.Remove Resource . ... 7.Resource(s) Status Change . ... 9.Admin Home (Other Tasks) . ... 8.Resource Help . ...

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• Errors in the Steady State and Quasi-SS Models
• Radio patrol survey by Gregory and Taylor
• Discussion

Computing LST Rise and Set Times at AO . ... Source Name: . RA (J2000): . ... Dec (J2000): . ... Each line should have, Source name, RA (hhmmss.s), Dec (ddmmss.s) . ... Enter the List . Use the List from a file) . ... Exclude rise times . Exclude transit times . Exclude set times . ... This tool computes the LST rise, transit and set times at Arecibo for a source using the program srcTimes (written by Phil Perillat) ...

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• VLBI at Arecibo Observatory
• rise and Set Times at AO
• pointing

... About ATNF overview . ... Parkes radio telescope . ... Online Resources . ... Australia Telescope 20GHz Survey . ... We present the first results from a study of the radio continuum properties of galaxies in the 2dF Galaxy Redshift Survey, based on thirty 2dF fields covering a total area of about 100deg 2 . ... mag. are detected as radio continuum sources in the NRAO VLA Sky Survey (NVSS). ... radio continuum: galaxies, galaxies: distances and redshifts, galaxies: active, galaxies: starburst . ...

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• casacore: casa/OS/Timer.h Source File
• Comission 31 Time
• H Emission From Point Sources In The Magellanic Clouds

lsst.coordConv љ unknown . ... Files . ... src . time.cc . ... 7 љ inline double ttDaysFromTAI( double tai) { . 8 љ return (tai + coordConv::TT_TAI ) / coordConv::SecPerDay ; . ... 12 љ return (ttDays * coordConv::SecPerDay ) - coordConv::TT_TAI ; . ... 18 љ double lastFromTAI ( double tai, Site const &site) { . ... 20 љ double ut1Days = (tai + site. ut1_tai ) / SecPerDay ; . ... 24 љ double ttDays = (tai + TT_TAI ) / SecPerDay ; . ... Definition: time.cc:43 . ... coordConv::Site::ut1_tai . ...

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• lsst.tcc: python/tcc/util/time.py Source File
• lsst.coordConv: include/coordConv/time.h Source File
• lsst.tcc: python/tcc/cmd/showTime.py Source File

... Unlike clients such as Shout and IceDJ this permits the broadcast of live audio, rather than prerecorded mp3's. LiveIce was developed after the appearance of IceCast to provide the Real Time streaming functionality which makes it a viable solution for broadcasting. It is based on the guts of 2 of my previous works - Mp3Serv, the first mp3 broadcasting system & Mp3Mixer, a toy which allows the user to 'Mix' with mp3 streams. ... LiveIce XMMS sourcecode is available here . ...

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• Armagh Observatory
• Mysterious music source revealed | International Year of Astronomy in Ireland |
• IAJ: Ireland

home education > resources . ... Resources . ... Astronomy Education Bibliography . ... Black Holes: An Introductory Resource List . ... Space Science Education Resource Directory . ... An asteroid space ship being chased by an enemy missile goes through the ergosphere of a rotating black hole, taking energy out and making the chasing missile fall in the event horizon. ... In the far future, a virtual human is dropped into a black hole and makes an interesting discovery about space and time. ...

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• ASP: Astronomical Pseudo-Science: A Skeptic's Resource List
• ASP: Multicultural Astronomy: The Astronomy of Non-western Cultures: A Resource
• ASP: The Astronomy of Many Cultures: A Resource Guide

Stellarium 0.12.3 . ... FileљStructure . FileљList . FileљMembers . core . planetsephems . sideral_time.h . ... 2 љ Copyright (C) 2000 Liam Girdwood <liam@nova-ioe.org> . 3 љ Copyright (C) 2003 Fabien Chereau . 4 љ Copyright (C) 2010 Georg Zotti (parts) . ... 7 љ it under the terms of the GNU Library General Public License as published by . ... 28 љ /* Calculate mean sidereal time from date. */ . 29 љ double get_mean_sidereal_time ( double JD); . ...

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• Stellarium: core/StelLocaleMgr.hpp Source File
• Stellarium: core/planetsephems/vsop87.h Source File
• Stellarium: core/planetsephems/elliptic_to_rectangular.h Source File

... The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. ... Information on the NTP architecture, protocol and algorithms can be found in the Further Information and Bibliography page. The Building and Installing the Distribution page presents an overview of the procedures for compiling the distribution and installing it on a typical client or server. ...

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• ntptrace - trace a chain of NTP servers back to the primary source
• Access Control Options
• Further Information and Bibliography

This module provides for the generation of Expires HTTP headers according to user-specified criteria. ... This module controls the setting of the Expires HTTP header in server responses. The expiration date can set to be relative to either the time the source file was last modified, or to the time of the client access. ... ExpiresByType . ExpiresDefault . The ExpiresDefault and ExpiresByType directives can also be defined in a more readable syntax of the form: . ... Module: mod_expires . ...

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• Source Re-organisation

... This project was my personal idea quite some time ago: to port XFree86 , the free and optimized X11R6 implementation to OS/2. ... XFree86/OS2 is now available as a public version 3.3.6, which does not expire and for which full source code is available. ... x.physics.usyd.edu.au Please send a mail to me with a complete URL if you have set up a ftp server or a mirror for XFree86/OS2. ... Available ported software . ... I'll still be available as the mediator between XFree86/OS2 and general XFree86. ...

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... Time service of RATAN-600 outputs sideral seconds and impulses of minutes with time codes for feed-cabines. These signals are coincided with local sideral time, recalculated from coordinate time UTC, using of sideral time program (stm) having accuracy of 0.0001s. DeltaUTC can be received from Time service or from Astronomical Annuals. The program stm calculates mean sideral time on any date with high accuracy (usage: stm hh [dd/mm/yy] ). ...

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• Radio sources identfification
• Sts page
• Plug-and-Play-HOWTO : What Is My Current Configuration?

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

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• VISTA - Visible and Infrared Survey Telescope for Astronomy

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... February 2006 resources . FROM THE February 2006 ISSUE . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• Resources for red-star fans | Astronomy.com
• Source of jets found on Enceladus | Astronomy.com
• New type of gamma-ray source found | Astronomy.com

ACE Real Time Solar Wind (RTSW) data, Kp index, solar and geophysical forecasts are contributed by the U.S. Department of Commerce, NOAA, Space Environment Center and are available to broad community at http://www.sec.noaa.gov/index.html . ... The Kp planetary index is prepared by the U.S. Dept. of Commerce, NOAA, Space Environment Laboratory. from preliminary data provided by the contributing stations and the U.S. Geological Survey. ... Instrument Web site is at URL: http://swepam.lanl.gov ...

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• "Exploration" as a Classroom Resource
• Compact laser time-of-fligh mass-reflector (LASMA)
• The Sun

... We present a new method for visualizing flux variations in X-ray images. ... The time variability image so constructed visually shows area where strong time variation occurred. ... Figure 1. shows the intensity (left) and time variability (right) image of the ROSAT field centered on the X-ray source MKW 3. ... The corresponding time variability image is shown to the right. ... These examples clearly show the power of the method described in evidencing variable sources in crowded X-ray images. ...

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• A Spectroscopy Exposure Time Calculator for IRAF
• Real Time Science Displays for the Proportional Counter Array Experiment on the
• An Extragalactic Point Source Simulator for SIRTF Pipeline Testing

. The Source Code Control System is an essential tool for any project with multiple source files or which has several people working with multiple source files. It provides a way to keep track of a source file's development and to prevent it from being altered by more than one person at a time. Putting files under SCCS control . Checking out files . Checking in files . Getting information about files . Creating new releases . Comparing files under SCCS control .

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... Science . ... Science Users Information > Libraries > Information resources > Librarians' Professional Resources . ... ESO Data . ... IFLA: Digital Libraries Resources and Projects . ... A resource for librarians on the topic of electronic content licensing for academic and research libraries. ... A virtual library resource center, designed to break through the information overload of the Web to bring the best library and reference sites together with insightful editorial in one user-friendly spot. ...

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• Previously Identified Sources
• The Cross-correlations
• Optical Spectroscopy