... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

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The preferred way to document an SAS package is via LaTeX. If you created the package directory structure with the SAS package maker pkgmaker , a subdirectory called doc will have been created with partially filled out LaTeX templates. ... Also, the new structure is seamlessly integrated in the overall SAS make file mechanism so that it becomes possible to generate HTML or PostScript documentation for the whole SAS. ... The BibTeX file is called sas.bib and is pat of the package sas . ...

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• clex: Command-Line-Expression-evaluator
• Description

... There are compelling reasons for the pulsar community to utilise a standard data storage format. For example, standardisation of file formats significantly decreases the amount of effort required to integrate new instruments into the analysis chain. ... Accordingly, we have defined PSRFITS as a standard FITS-based format for pulsar data files. ... For example, the first line of Processing History HDU contains information about the data acquisition program and the initial structure of the file. ...

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• World Coordinate Systems (WCS) in FITS
• Metadata Standards
• Other Supporting Tools

... This is possible at modest cost due to the low moments of inertia of the telescope and enclosure. ... This same performance will be achieved in higher winds when the telescope enclosure is facing away from the wind, or by using wind screens. ... The telescope system (MILT) will be remotely operable with an on-site operator's assistance by an astronomer located at one of the ARC member institutions. ... Mean Wind Speed . ... Offsets > 10 deg: 1 arc sec rms max . ... 5 sec max, tracking to tracking . ...

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• TwistedActor.Actor Standard Commands
• TclActor
• Astrophysical Research Consortium - Apache Point Observatory

Each file type known to SAOtng can have user-defined analysis commands associated with it. ... A help line describing the file types . ... For example, the default analysis file currently contains the following: # # Analysis command descriptions: # help # file templates # file types # analysis command line counts -- number of events in region (no background) *.qp *.imh QPOE IMH uiraf '${xraybin}'/x_xspatial.e imcnts source='${filename}' region=$sregion bkgd=0 table=NONE | ...

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• Introduction to XPA
• ISDN References
• Multi-Rsh parallelized rsh program

... We present a proposed standard for data dictionaries associated with catalogs being accessed through the Astrophysics Data System (ADS) Mosaic Catalog Service. Each catalog made available for searching must have a data dictionary, which consists of a set of specified keywords describing format, content and location of data. ... There are two keywords in the Table Data Dictionary which indicate to the server software that the corresponding column contains special attributes. ...

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• ADASS 2002 Conference Proceedings
• Applying Public Access Programming Techniques To SAOimage
• ADASS 2003 Conference Proceedings

Next: Reduction procedure Up: Extinction and transformation Previous: Strategy . Standard stars can be included in the extinction solution, if one is careful. The problem is that there are usually appreciable ``conformity errors'' due to mismatch between the instrumental and the standard passbands [ 16 ]. ... Thus, it is wrong to assume that the transformation between the instrumental system and the standard system is exact, even if there were no measurement error in either system [ 1 ]. ...

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• Instrument Description: CASPEC
• Standard values
• ESO-MIDAS: System Overview

... Purpose: The purpose of this program is to monitor the sensitivity, wavelength and detector calibrations of Side 2. Description: Four times per year (twice in Cycle 6) the following observations will be done: . ... SENSITIVITY MONITORING . ... Fraction of GO Programs Supported: All GHRS programs using gratings G160M (19%), G200M (7%), and G270M (15%). ... Observation: Internal-16 orbits (8 orbits for each of the 2 executions. Note: the internal orbits are full orbits). ...

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• ST Grants Management System
• Astronomical Catalogs
• HSP Data Handbook

Next: Program parameters Up: Description of program searchdup Previous: Description of program searchdup . The program searchdup searches a catalog file for sources observed multiple times. It produces a file that can be plotted with a standard plotting utility (e.g. smongo), or a new catalog file in the same format of the input one, with just one record per independent source. ...

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• Relevant Standards - Apache HTTP Server
• HwB: EISA (technical) Connector (Offline)
• mod_ext_filter - Apache HTTP Server

... Using UNIX System Calls and Library Functions . ... To use system calls and library functions in a C program we simply call the appropriate C function. Examples of standard library functions we have met include the higher level I/O functions -- fprintf() , malloc() .. ... For most system calls and library functions we have to include an appropriate header file. e.g. stdio.h, math.h . ... Information on nearly all system calls and library functions is available in manual pages. ...

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• Principles of organization
• C Standard Library Functions
• NEdit

Open Systems Handbook: A Guide to Building Open Systems . ... This book is designed to provide interested individuals and organizations with an overview of open systems and the work being done to achieve them. ... This section is organized using a descriptive model of an open systems environment developed by the IEEE PI 003.0 Working Group, which is developing the Guide to POSIX-based Open System Architecture. ... Standards for open systems 13 . Chapter 3: The open systems environment (OSE) 15 . ...

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• IEEE STANDARDS PRODUCTS CATALOG
• GOVERNMENT OPEN SYSTEMS INTERCONNECTION PROFILE (GOSIP)
• Open System Handbook: A Guide to Building Open Systems

Automatic Detection of NEOs in CCD Frames . ... CCD frames obtained with modern telescopes with robotic operation allow carrying out standard observation programs for detection of peculiar objects on stellar backgrounds, as is the case of Near Earth Objects (NEOs). ... In this paper, we present original algorithms for automatically detecting dim NEO images in telescope frames, considering both sidereal and differential tracking [2]. ...

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• NAA 2005-2006 (preface)
• NAA 2007-2008 (preface)
• NAA 2015-2016 (preface)

... Donate to Support Science Literacy . ... 2016 Annual Awards . The ASP is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach. ... Shop the AstroShop . ... The Astronomical Society of the Pacific (ASP) is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach.. ...

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• ASP: Black Holes to Blackboards: Building Universes in the Classroom
• ASP: Galileo Educator Network (GEN)
• ASP: Up, Up, and Away

SAI 175 anniversary . ... Moscow University . Search for in SAI Moscow University Search for in Russian astronomical resources . ... SAI Astronomical Databases . ... Browse SAI Software archive(ftp.sai.msu.su) . ASTRONET.RU - Russian Astronomical Network (available in translit also) . ... SAI Supernovae Research Group . ... Department of the Galaxy and Variable Stars (in Russian) . Sternberg Astronomical Institute Seminars . ... All-Russian Astronomical Olympiad (in Russian) . ...

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• authcert - DES validation program
• xntpd - Network Time Protocol (NTP) daemon
• md5 - generate message digest

... printhdrV - print datataking headers in ASCII (ao) printhdrV [ -s ] . printhdrV is a program to convert ao datataking headers from binary to ASCII, format them with labels, and then output this data to the standard output. ... Arecibo datataking records contain a header followed by the data. ... Only output the standard header section. printhdrV can be used in conjuction with the stripVme (1l) and grep (1) programs to dump the headers of datataking tapes to the screen or a file. ...

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• Manpage of ROTATE
• Standard On
• stantAloneFiltersPrograms

... The reduction system of observations FADPS (description in Russian) (Flexible Astronomical Data Processing System) for data of wide-band receivers of the first observation cabin of the radio telescope RATAN-600 had been created under the Unix-like operational system DEMOS for computers of the SM-1420-type (PDP/11) in 1987 for observation analysis and estimates of coordinates and flux densities of radio sources. ... FADPS: flexible astronomical data processing system at RATAN-600 in UNIX environment....

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SAI VO . ... SAI CAS . ... Web Services . Catalog Access Services . ... SAI VO Wiki . ... Program Access . SAI CAS Wiki . SAI Web Services . ... DSS Mirror . ... We provide an implementation of IVOA standard Simple Image Access Protocol interface to our DSS mirror. Service metadata is available here . Currently, we provide the atlas service only, which returns the list of original DSS images intersecting the requested sky area. ... SAI MSU | ...

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• SAI Virtual Observatory Project
• SAI Virtual Observatory Project - About
• volinks [SAI Virtual Observatory - Wiki]

Status of the RadioAstron project development . The engineering model of the Space Radio Telescope (SRT) was assembled in Lavochkin Association (LA) in the configuration consisting of 10-m parabolic radio astronomical antenna made of carbon-fiber, F ocal and Device cabins of the scientific payload and on-board and ground complex of high data rate up-down radio link (VIRK). ... Then,radio astronomical tests were conducted using real radio sources. ... Space Radio Telescope . ... Data Processing . ...

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... As stable VLT work horses during the past 8 years obviously the two FORSes have in many ways also been instrumental to the definition of the VLT queue observing paradigm which includes both systematic collection of calibration data, online and offline reduction pipelines. The original concept for the photometric calibration and the FORS imaging pipelines involved acquisition of simple twilight images which were used for flatfielding, and observation of Landolt photometric standards. ...

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• DFS standard abbreviations
• recommended DFS development tools
• DFOS: tune your browser

Astronomical Data Center . ... You can access the files described here in three ways: . ... Use CDS' VizieR Service at ADC to explore the data files. ... Get the data files via anonymous FTP. ... 1981) -------------------------------------------------------------------------------- Byte-per-byte Description of file : table1a Byte-per-byte Description of file : table1b -------------------------------------------------------------------------------- Bytes Format Units Label Explanations ...

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• Iowa Robotic Telescope Facilities
• SAO Star Catalog