... Performs adaptive smoothing on EPIC or OM images. PostScript . ChangeLog . ... Calculates sky coordinates on an event-by-event basis . ... Makes a background spectrum appropriate to the accumulation region of a source spectrum . ... Perl script for the EPIC MOS pipeline . ... Defines final list of events, their position and time for EPIC-MOS . ... Merges event lists from all CCD/nodes into a single event file . ... Correct RGS event positions for spacecraft pointing . ...

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• plot packages

Next: Photometry Up: Regions and Source Parameters Previous: *imcnts* - Find counts . This task (developed for use with optical images, but also useful with x-ray data) will quickly compute location, size, ellipticity, and position angle of sources. ... User can generate contour plots of any portion of the image and count rates in slices through the image. The program is advertised as ``quick [optical] photometry''. input file: rp110590_im1.imh . output file: logfile . ... Photometry . ...

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• The AstroStat Slog Blog Archive [ArXiv] Statistical Analysis of fMRI Data

... PUL VLBI Analysis Center . ... Pulkovo EOP and Reference Systems Analysis Center (PERSAC) is located at the Pulkovo Observatory . ... Processing of VLBI , GPS, and optical observations aimed at analysis of the Earth rotation, station displacement, and celestial reference system. ... Celestial Pole Offset (CPO) and Free Core Nutation (FCN) . Four daily updated CPO and FCN series (models) are provided. ... File fcn1.dat contains the ZM1 FCN model with variable amplitude and phase. ...

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Next: A New Entropy Measure Based on Multiple Resolution and Noise Modeling . ... The entropy measurement has been proposed for image restoration several years ago in astronomy. ... The multiscale entropy has the advantage to introduce a noise modeling, and the concept of information at different level of resolution. ... We show in this paper that it can also be used for background fluctuations analysis. ... Five simulated images were created by adding 400, 200, 100, 50, 0 sources to a noisy image. ...

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• NICMOS Calibration Pipeline: Processing Associations of Exposures
• The Sliding-Cell Detection Program for Chandra X-ray Data
• TwoFitlines: An Spectrum and Line Analysis Tool

Next: Combining Bias Frames Up: Preparing Your Calibration Previous: Input and Output . Except for summing the frames together, combining frames may require correcting for variations between the frames due to differing exposure times, sky background, extinctions, and positions. ... The input frames are combined by applying a sigma clipping algorithm at each pixel. ... The input frames are combined with a variant of the sigma clipping algorithm which works well with only a few frames. ...

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• Period analysis
• Output data format
• Comparison of two stochastic processes

Computer Ephemeris. Second order reduction quantities. Explanations. This page consist of four little tables. First and second tables contains J a (in 0.000001 s ) and J d (0.0001") for nothern declination, third and fourth contains the same information but for southern declination. Each table have 13 informational columns headed with right ascension values, and some amount of rows, labelled with date. ...

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• Lunar pericenters. Explanations for Computer Ephemeris (DE200/LE200).
• Lunar phases. Explanations for Computer Ephemeris.
• Lunar eclipce explanation page of Computer Ephemeris (DE200/LE200).

... This tool allows you to quickly place a co-ordinate system (compute a plate solution) onto an image which does not have one. ... The right window should be loaded with your target image (the image without the co-ordinate system), by pressing Target Images . ... To do this, you must first click (middle) in the left window, near a star, and then click (middle) in the right window near the corresponding star. ... As you select a star, a green circle is drawn around the fitted centre of the star. ...

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• Do Starburst galaxies contain buried AGN?
• Using CASA CentralProcessor 0.11 documentation
• uvmodel

... NICMOS Data Handbook > Chapter 5: Data Analysis > 5.6 Analysis of Polarization Images . ... The filter wheels of cameras NIC1 and NIC2 each contain three polarizing filters with unique polarizing efficiencies and position angle offsets. ... To generate Stokes parameters, the relative differences in flux between images in the different polarizing filters are used. ... If you attempt to calculate the Stokes parameters using such data, you will likely obtain large and entirely spurious polarizations. ...

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• NICMOS STScI Analysis Newsletter 13
• Fine Guidance Sensor Instrument Handbook
• NICMOS Background

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 following articles and reports, which are available online . Mills, D.L. Internet time synchronization: the Network Time Protocol. ... Mills, D.L. Network Time Protocol (Version 3) specification, implementation and analysis. ...

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• Hints and Kinks
• The Network Time Protocol (NTP) Distribution
• Astronomical Links

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

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• SLITLESS (Oct97) --- ST_ECF --- SLITLESS (Oct97)
• STScI NICMOS Software
• ST-ECF Grism Spectrum Software for NICMOS Grism Data

... Ham packet radio system including: . ... control computer RSC 2. dedicated software monitoring generation of probing pulses in onboard transceiver in radio beacon mode; . ground receiving network of ham radio packet communication to record probing pulses of onboard radio beacon; . ... Generation of onboard radio beacon probing pulses as time marks to ground receiving network (including ham radio receivers of USW) and transmission of the measurement results throughout Internet network. ...

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• S.P.Korolev RSC Energia - LAUNCHERS

... Use of This Manual . ... Spectral-Line Observing at Arecibo (3.25 Mbyte) + Spectral line Appendices (0.56 Mbyte) ( HTML page ) . ... Data Analysis . ... Continuum Observing at Arecibo (0.36 Mbyte) + Continuum Appendices (0.31 Mbyte) . ... Pulsar Observations at Arecibo (4.03 Mbyte) + Pulsar Appendices (0.70 Mbyte) ( HTML page ) . ... VLBI Observing at Arecibo (0.36 Mbyte) + VLBI Appendices (0.35 Mbyte) . ... Introduction to Computing at Arecibo (0.33 Mbyte) + Computing Appendices (0.32 Mbyte) . ...

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• patriot 12 meter telescope
• Data and Analysis
• spectrometer counts to kelvins

Fringe parameters are the complex visibility, the squared visibility amplitude, and the total count rate. These can be computed from bincounts using the functions fringevis , fringevissq , and fringenphot . v=fringevis(bincounts(1,*,*,*)) . ... Instead of computing the modulus of the complex visibility, we use a different estimator for the squared amplitude. ... I have verified with simulated fringe frames that this procedure results in the correct squared visibility amplitudes. ...

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• The Very Large Telescope Project
• NPOI Lab
• About

... 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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• Group for study of galaxies and cosmology, history
• Lectures

... Colors of Sunlight . S-4A.Color Expts. ... Here is your opportunity to demonstrate the three-color theory by using your computer. I am indebted for this to Joe Burns , on whose color demonstration file it is based. ... You see below two tables with colored fields. ... blue . ... D0FBFF gives the intensity of the three colors which make up the background: D0 is the intensity of red , FB is the intensity of green and the second FF is the intensity of blue , the maximum blue you can get. ...

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• The Discovery of Atoms and Nuclei

previous next contents properties index . ... Inherited? ... inherit . ... yes . aural . ... visual . ... none | ... length> ]{1,2} | ... block-level and replaced elements . ... see individual properties . ... table' and 'inline-table' elements . ... length> <length> ? ... the value of the 'color' property . ... auto | ... positioned elements . ... table-caption' elements . ... yes, the computed value is inherited . ... all elements except non-replaced inline elements and table elements . ...

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• Thomson's method of spectral estimation
• Long description for anonymous block box
• Long description for background pattern

... Alessandro Melchiorri, Laura Mersini, Carolina J. Odman , Mark Trodden 2002 The State of the Dark Energy Equation of State ( astro-ph/0211522 ) . ... Carolina J. Odman, Alessandro Melchiorri, Michael P. Hobson, Anthony N. Lasenby 2002 Constraining the shape of the CMB: a Peak-by-Peak analysis PRD, submitted ( astro-ph/0207286 ) . Antony Lewis, Sarah Bridle. ... Elgaroy, O., Lahav, O. , Percival, W.J., Peacock, J.A., Madgwick, D.S., Bridle, S.L. , and the 2dF team. ...

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• Galaxy Evolution: Computing
• PPEUC Programme - Cosmic Microwave Background Workshop
• Accessing measurement set data Bojan Nikolic web pages (r. 329)

... This page contains pictures and text to accompany the press release entitled "some black holes are pink", which was presented as part of the Fresh Science event, ScienceNow! ... I first show colour pictures of the pink black holes (and of some blue and yellow ones for comparison. ... If you are having this trouble, I've included pictures below with stretched colour maps, to emphasise the colours: these should print better. (jpeg image, 29kb) . ... Quasar (black hole) PKS 1133-172. ...

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• Observational Techniques: Computer Notes
• Cabinets containing the Palomar, ESO and UKST survey plates and films.
• Walter Stibbs signs the page containing his picture for Kim Rawlings

... Report on Cosmic Call 1999 . ... Cosmic Call Sessions . ... This Report outlines methodology, hard- and software, which were developed to transmit first public Interstellar messages from Evpatoria Deep Space Center (EDSC), and describes four Cosmic Call Sessions, which were fulfilled in EDSC on May 24 and June 30 - July 1, 1999. ... Each Cosmic Call consists of two parts. ... Dutil Message, . ... The software for gathering all messages and creating the Cosmic Call stream, was written on C language. ...

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• Research Activities of InformChaos Lab.
• Getting Started in Actor Prolog. Analyzing Web Sites.
• Getting Started in Actor Prolog. The idea of Logical Actors.

... The user database is traditionally contained in the /etc/passwd   file. Some systems use shadow passwords , and have moved the passwords to /etc/shadow   . ... However, installing shadow passwords later onto a system that did not support them can be difficult. ... The crack   program can be used to crack passwords; any password it can find is by definition not a good one. ... The user group database is kept in /etc/group   ; for systems with shadow passwords, there can be a /etc/shadow.group   . ...

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• IAJ: Resources: Software
• Background
• The /var filesystem