... The flux from a fully extended continuum source as transmitted by the science slit, over an arbitrary number of pixels in the spatial direction (Npix s ) and taken over an arbitrary number of pixels in the wavelength direction (Npix ) 1 , is given by: . ... over a Npix ? m by Npix s ? ... d / m converts between diffuse continuum source surface brightness and diffuse emission line surface brightness and is given in the CONT2EML header keyword; it is simply the slit width expressed in Angstroms. ...

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• Exposure Time Estimation
• WFC3 Data Handbook
• When using the WWW Exposure Time Calculator for polarimetry, what is the source

... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

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• Nova Herculis 1991
• Program parameters
• Client-Specific Features

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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• The AstroStat Slog Blog Archive Quote of the Week, May 29, 2007
• Time Warp - Links
• Martin Elvis - Brief Biography

Comment on J0513-2159 . Our image shows an extension to about 5 mas SE from the brightest feature. The EVN 8 GHz image by Dallacasa et al. (1998), with about five times larger resolution, shows an extension from the brightest feature roughly opposite to our direction. As noted by Dallacasa et al. (1998), the structure detected has a highly inverted spectrum, which, together with the reported variability in the source, could explain the structural disagreement. ...

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... 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

... Visited 4654 times - Selected 51 months ago . ... Visited 5052 times - Selected 51 months ago . ... Visited 4679 times - Selected 51 months ago . ... Visited 5557 times - Selected 52 months ago . ... Visited 5402 times - Selected 51 months ago . ... Visited 5355 times - Selected 52 months ago . ... Visited 6329 times - Selected 52 months ago . ... Visited 4319 times - Selected 51 months ago . ... Visited 5376 times - Selected 183 months ago . ... Visited 5654 times - Selected 51 months ago . ...

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... Classes . Files . ... File List . File Members . casa . ... National Radio Astronomy Observatory 00023 //# 520 Edgemont Road 00024 //# Charlottesville, VA 22903-2475 USA 00025 //# 00026 //# $Id: OS.h 20551 2009-03-25 00:11:33Z Malte.Marquarding $ 00027 00028 #ifndef CASA _OS_H 00029 #define CASA _OS_H 00030 00031 //# Includes 00032 # include casa /OS/EnvVar.h 00033 # include casa /OS/Path.h 00034 # include casa /OS/RegularFile.h 00035 # include ...

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• Time average separate scans
• casacore: casa/OS/Timer.h Source File
• Arch Intranet Search Engine - Open source, enterprise strength, fast and easy

... 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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• The ROSAT All-Sky Survey Bright Source Catalogue
• The EGRET3 Survey
• Radio patrol survey by Gregory and Taylor

... 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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• APOD: 2008 August 11 - Black Hole Candidate Cygnus X-1
• ntptrace - trace a chain of NTP servers back to the primary source
• Spectracom 8170 and Netclock/2 WWVB Receivers

... Director of the RAS ISR . RAS Academician . ... Astrophysics module Kvant of the orbital complex Mir launched in 1987 contains the largest on the station complex of the scientific equipment named the orbital observatory Roentgen. Observatory Roentgen consists of 4 X-ray telescopes, jointly exceeding the range of energies from 2 to 800 keV. ... Among the most significant results that were received in the observatory Roentgen are: . ... measurement of the periods of 9 X-ray pulsars; . ...

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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
• ON/OFF (Position Switching)
• CIMA Auto-Observing

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/mir/mirrorDevice.py Source File

specpsf -- Form a longslit spectrum for a point source from many point spread function images specpsf refima psfwavs psfims sliwid pixwid subsam cenoff psfpos outpsf . ... The name of the input 2-dimensional reference image to supply the dimensions and header information for the output longslit Point Spread Function (PSF) spectrum image. psfwavs = "" [table file name] . ... The centre of the Point Spread Function in each input image is determined by centroiding and the slit is placed over the image. ...

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• Interferometry
• Time Sequence of Crab Pulsar | ESO
• The Cross-correlations

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/planetsephems/calc_interpolated_elements.h Source File
• Stellarium: core/StelLocaleMgr.hpp Source File
• Stellarium: core/StelMovementMgr.hpp Source File

... 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
• Giant ring of black holes in Arp 147 | Astronomy.com
• January 2006 resources | Astronomy.com

As of 1.3, the Apache source directories have been re-organised. This re-organisation is designed to simplify the directory structure, make it easier to add additional modules, and to give module authors a way of specifying compile time options or distribute binary modules. ... The non-module source files have moved from src into src/main . ... Configure . ... For example, say it is called mod_demo.c. The archive for this module should consist of two files, in a suitable directory name. ...

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• Apache module mod_expires
• Module mod_actions
• Apache modules

... 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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• An Extragalactic Point Source Simulator for SIRTF Pipeline Testing
• Real Time Science Displays for the Proportional Counter Array Experiment on the
• Recreating Einstein Level One Processing Exposure Masks and Background Maps in

... 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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• LWN: Driver porting: Timekeeping changes
• Time Functions
• Radio sources identfification

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

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• IRAS01005+7910
• Metagalaxy sector, archive 2015
• Galaxy sector, archive 2014

RTT150 . ... This search system is designed for generating the necessary information on series of pointings (observations of each source consist of sets of exposures with different filters and sometimes with different exposure times) for observed sources. Search results appear at the separate page as a table with the following data: . DATE - real (not evening!) observations date (in YYYY-MM-DD format); . ... Bin - minimal CCD binning mode (may vary during the observations); . ...

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• Титарчук Лев Григорьевич (NRL)