Flat Fielding ============================== .. warning:: This is one of the areas where algorithms are still in flux and calibration methods are not fully mature. Observed Effect and Relevant Physics: --------------------------------------- The goal of a flat-field is to correct for transmission of the instrument as a function of field-of-view. ... Quantum efficiency variations of the Detector (includes: intrapixel sensitivity variations, pixel-to-pixel variations and low-frequency variations). ...

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• Flat Fielding GPI Data Pipeline 1.0 documentation
• Convolving data models with PSF models
• Prescription Retrieval

... Tiny Tim has been used for generating Hubble Space Telescope ( HST ) point-spread functions (PSFs) for deconvolution, algorithm testing, proposal planning, and optical studies. ... Tiny Tim is a stand-alone program for simulating HST PSFs as viewed with the on-board imaging cameras (WF/PC-1, WFPC2, FOC, COSTAR/FOC). ... The measured aberrations for FOC f/96, WF/PC-1 PC6, WFPC2, and COSTAR/FOC are used by Tiny Tim . ... Figure: FOC f/96 observed and Tiny Tim model PSFs (pre-COSTAR) at 253 nm. ...

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• ADASS 2003 Conference Proceedings
• A New PROS Task for Calculating HRI Source Intensities or Upper Limits

... This program will be a part of AATM-0.06 examples when this version is released. ... Comments regarding this example welcome at: // Bojan Nikolic b.nikolic@mrao.cam.ac.uk // # include string # include vector # include iostream # include fstream // Unfortunately the using statement below is required because of poor // desgin of the header files using namespace std ; # include ATMRefractiveIndexProfile.h # include ATMPercent.h # include ATMPressure.h # ...

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• OptInt PmWiki : Include Other Pages | Attach
• OptInt PmWiki : Include Other Pages | History
• OptInt PmWiki : Include Other Pages | Edit

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• THE SCHED INPUT FILES (Includes parameter lists)
• ATCA 25th Anniversary: Accommodation
• Sheltran - Include Files

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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• What to do with it
• Input Data and Preprocessing
• E-mailing Professor Wright

Diamond's Stealth64 Video 3200 is the perfect, cost-effective choice for excellent graphics and video performance on PCI systems. ... Accelerated video playback provides smooth viewing of popular multimedia applications and digital video clips at full screen resolution at up to 30 frames per second. The Diamond Stealth64 Video 3200 continues our award-winning tradition, delivering the best price/performance multimedia accelerator available. ... 64-bit Graphics Performance . ... Video Connector: . ...

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• Wavelets and Green's functions
• Explanations for solar physics computing page
• Stealth 64 VRAM Data Sheet

lsst.tcc   1.2.2-3-g89ecb63 . ... Files . ... include . tcc . tcsShim.h . ... 51   double const FL = 1.0; . ... 97   std::ostream & operator<< (std::ostream &os, ASTROM const &astrom); . ... 99   std::ostream & operator<< (std::ostream &os, FLDOR const &fldor); . ... 101   std::ostream & operator<< (std::ostream &os, PORIG const &porig); . ... 103   std::ostream & operator<< (std::ostream &os, SITE const &site); . ... 105   std::ostream & operator<< (std::ostream &os, TARG const &targ); . ...

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• lsst.coordConv: include/coordConv/site.h Source File
• APO Job Announcements
• lsst.tcc: include/tcc/basics.h Source File

National Aeronautics and Space Administration . ... Bruce McCandless II (Captain, USN, Ret.) NASA Astronaut (former) . ... He was a member of the astronaut support crew for the Apollo 14 mission and was backup pilot for the first manned Skylab mission (SL-1/SL-2). ... A veteran of two space flights, McCandless has logged over 312 hours in space, including 4 hours of MMU flight time. ... With the completion of this flight McCandless logged 191 hours in space (including 4 hours of MMU flight time). ...

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• Astronaut Bio: William Anders
• Astronaut Bio: Jose Hernandez (01/2011)
• Astronaut Bio: Gregory Errol Chamitoff (10/2013)

... In the past month, I?ve noticed relatively frequent paper appearance in arxiv/astro-ph whose title includes Bayesian or Markov Chain Monte Carlo (MCMC) . ... astro-ph:0708.2340v1] Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm by L. Miller et. al. [astro-ph:0708.1871v1] Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach by Y. Gong et. al. in addition to the previous posting in this slog, [ArXiv] Bayesian Star Formation Study. ...

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• The AstroStat Slog Blog Archive [ArXiv] Post Model Selection, Nov. 7, 2007
• The AstroStat Slog calibration uncertainty
• A box, to include extended emission

... ASTRONET SV Symposium Poitiers January 23rd 2007 Background & Motivation What facilities/resources do we need to deliver the Science Vision? ... Mike Bode, (Leader, WP 3.1), Liverpool JMU: mfb@astro.livjm.ac.uk Maria Cruz (ASTRONET Roadmap Project Assistant), Liverpool JMU: mxc@astro.livjm.ac.uk Individual Panel Chairs (contacts to be posted on ASTRONET web pages) See also (as ever) the ASTRONET website for updates ASTRONET SV Symposium Poitiers January 23rd 2007 ...

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• Effective temperatures
• Selection Effects
• BL Lacs

XMM-Newton CCF Release Note XMM-CCF-REL-320 RGS Bad Pixels C. Gabriel July 23, 2014 1 CCF comp onents Name of CCF RGS2 BADPIX 0033 VALDATE 2000-02-03T08:00:00 EVALDATE 2000-02-14T08:00:00 Blocks changed BADPIX XSCS flag NO 2 Changes This release covers a very short period (11 days) in the beginning of the mission, period in which the CCD 4 of the RGS2 instrument was malfunctioning (giving no signal at all), but not switched off, and included for commanding in the observation planning. ...

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• Index of /calibration/includes
• Home Page
• Point-Spread Function Fitting

... spectrum . ... The photons we detect originate in the outermost layers, or atmosphere, of the star. In order to interpret stellar spectra, it is necessary to construct models which accurately represent the structure of a stellar atmosphere and the transfer of radiation from the stellar interior into interstellar space. For the study of helium stars and other stellar remnants, we in Armagh use several computer programs, of which sterne and spectrum are the most important. sterne . ...

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• Research Environment
• Spectrum
• Software Store - Programmers Notes

home education . SEARCH ASP SITE: Match ALL words Match ANY word . ... SEED Grants to Scientists . ... The ASP SEED Grant program supports the ASP's mission to advance science and science literacy through astronomy by encouraging active researchers to engage in public outreach, K-14 formal education, or informal education programs or activities. ... Development, use, and dissemination of a well-illustrated college-level presentation on a specific topic or problem in current research . ... search . ...

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• ASP: ASP Conference Series to Include Free Electronic Access
• ASP: Cosmos in the Classroom
• ASP: Astronomy Education: A Selective Bibliography

The CHIANTI database consists of 4 primary ASCII files for each ion in the database. contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies. ... Wavelengths are based on experimental level energies where available; wavelengths calculated from theoretical energies are less accurate and are given as negative values. ... contains the spline fits to the electron collision strengths scaled according to Burgess and Tully (1992). ...

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• See include/linux/autoconf.h

... Extinction Class Reference . ... void  . forward (const Vec3d *altAzPos, float *mag, const int num=1) const . ... forward (const Vec3f *altAzPos, float *mag, const int num=1) const . ... forward (const double *sinAlt, float *mag, const int num) const . ... forward (const float *sinAlt, float *mag, const int num) const . ... forward (const double *sinAlt, float *mag) const . ... forward (const float *sinAlt, float *mag) const . ... backward (const float *sinAlt, float *mag, const int num=1) const . ...

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• Stellarium: core/StelSphereGeometry.hpp File Reference
• Stellarium: Atmosphere Class Reference
• Stellarium: Scripting Engine

... The variability of the spectrum of the optical component of the IR-source IRAS01005+7910 was discovered for the first time in the BTA spectra [1]. ... The spectral features include absorptions that form in near-photospheric layers, narrow envelope emissions, and emission-absorption profiles that form in photosphere-to-envelope transition layers (the wind). ... Discovery of spectral variation in the optical counterpart of IRAS01005+7910. ... Dashed line - envelope curve of all the SiII 5979 profiles ...

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• Hardware sector, archive 2009

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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• APOD: 2005 June 14 - Gliese 876 System Includes Large Terrestrial Planet
• APOD: 2014 February 3 - Lunar Time Lapse Panorama including Yutu Rover
• Configuration Options

Vertex Contract in Hindsight Computer driven control system design philosphy A contract for a complex software-driven system should include: 1. ... A complicated system should contain its own development system, i.e. it should be possible to program and reprogram the system from its own operating console or terminal. ... A general and flexible approach for our pointing system would be to have all the sensors and effectors connected to an upstairs unit that is driven by a fast Ethernet connection. ...

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• REU Science Area
• Index of /~phil/hardware/vertex/sharemegsvertex/lcu/pcr/devkit/INCLUDE
• Index of /~phil/hardware/vertex/sharemegsvertex/lcu/Sun/include/pctcp

... Mathematics is relatively straightforward library to use again. ... double x; x = sqrt(63.9); . ... double acos( double x) -- Compute arc cosine of x. double asin( double x) -- Compute arc sine of x. double atan( double x) -- Compute arc tangent of x. double atan2( double y, double x) -- Compute arc tangent of y/x. double ceil( double x) -- Get smallest integral value that exceeds x. double cos( double x) -- Compute cosine of angle in radians ...

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• The C Preprocessor
• Spectral energy distribution
• Mathematics

Text can be included in the shell script by using a here document, a special form of input redirection. The << symbol is used to indicate that text should be read up to a given mark. For example: #!/bin/sh # this script outputs the given text before it runs cat << EOF This shellscript is currently under development, please report any problems to Danny (danny@cornflake.ed) EOF exec /usr/local/test/bin/test_version . ...

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• Digitized Sky Engines
• Special Characters
• Overview of Character-Level Elements