... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Software authors of "Quick Fringe" and "MaxImDL." Quick Fringe is an optical interferogram fringe analysis program. ... 613) 225-2732 . ... 613) 225-9688 . Web Site . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

... For many ATMs, having a good ray trace program on hand is pretty valuable. ... http://www.willbell.com . ... It is a slick Windows package with great graphics, but my most recent machine (Win95 OSR2) now encounters many error messages. ... OSLO LT : This is the freeware Windows version of OSLO - it is limited to 12 surfaces, but is otherwise amazing. ... KDP : This is another powerful, freeware Windows raytrace package. ... ZEMAX : This is yet another powerful, Windows raytrace package. ...

... HST . ... HST Overview . ... FGS Instrument Handbook . ... The interferometric response (in filter F583W) of the 3 original FGSs are shown in Chapter 2 of the FGS Instrument Handbook. ... For complete details on the interferometric response of FGS, please see the FGS Instrument Handbook . For other details on the FGS interferometric response, see Section 2.1.2 of the FGS Instrument Handbook. ... The HST Data Handbook is the primary guide for calibration, reduction and analysis of FGS data. ...

... 3.1 Candidate layouts .. ... 6.1.2 6.1.3 Conceptual design of thermal control .. ... Reasons for choosing preferred layout(s) Page 5 of 6 3.2 Preferred layouts 3.2.1 Error budgets and sensitivities 3.2.2 Feasibility 3.2.3 Comparison of costs 4 4.1 4.2 Camera Selection Candidate cameras Camera evaluation 5 5.1 5.2 5.3 5.4 5.5 Conceptual Opto-Mechanical Design Layout Mechanical analyses Base-plate design Optical mount design Camera mount 6 Conceptual Thermal Design FTT-NAS ...

... 400mm f/2.8 Nikor lens: images the sky on the entrance slit. ... The optical system maintains image quality along the slit length so that each row of the image is a spectrum of that spatially selected region of the sky. 180mm f/2.8 Nikor lens: collimates the light from the slit. ... The auxiliary optical platform on WISPI now accomodates a short focal lens and a guiding/imaging video system that may use sub-pixel corrections to provide feedback to the tracking drive motors. ...

The ALMA Development Plan Leonardo Testi ESO ALMA Programme Scientist The ALMA Development Plan, Sydney, 6 Feb 2012 1 ALMA beyond ALMA ALMA will allow transformational science thanks to the sensitivity, angular resolution, spectral coverage and image fidelity, but.. ... The ALMA Development Plan, Sydney, 6 Feb 2012 Leonardo Testi: ALMA, Firenze 24 Gennaio 2012! ...

... Annual Meeting . ... Other Workshops, Conferences and Events . ... Galileo Teacher Training Program Workshop . ... Submit an abstract (please read guidelines below first). ... Please fill out the abstract form carefully since the program committee will be rating the proposals based only on the information you provide. ... For the conference, you may be the lead author on one poster paper, and one oral session: a ten-minute oral paper presentation or an hour-long workshop or a special interest group....

... Image Area Store Area 240x120 24µm Gain Registers OP 8 Gain Registers Store Area OP 7 240x120 24µm Gain Registers OP 6 OP 1 OP 5 16 July 2008 Javier Reyes The design challenges des ges · Very fast read-out speed: up to 1500 fps speed: up to · Very low read-out noise. read-out ­ Effective ... · Very stable high-voltage clocks high-voltage · Low power consumption power consumption · Reduce volume: 19 x 23.5 x 7.5 cm 16 July 2008 Javier ...

... GCN 8471 | ... TITLE: GCN CIRCULAR NUMBER: 8516 SUBJECT: GRB 081102: MASTER refind and final results DATE: 08/11/11 15:50:10 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalognikh Ural State GCN Circ 8470, Lipunov et al., ...

... Russian KOI8 . Scientists of Laboratory of radio astrophysics develop algorithms and software. ... design of statistical estimations methods of average and smoothing; . fitting algorithms design; . development of the data processing system FADPS (Flexible Astronomical Data Processing System); . design of visualisating and interactive data reduction programs for initial observational data ( fgr (Russian KOI-8) ) and continuum radio sources spectra (spg); . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 April 18 . Visual Effects: Wonders of the Universe . ... Explanation: What visual ef