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GRAVLENS WORK

GRAVLENS WORK. Gravitational Lenses using GRAVLENS. |&gt; cout &lt;&lt; ”Last updated :” &lt;&lt; last_update &lt;&lt; “<br>”; |&gt; Last updated : October 11, 2006 |&gt;.

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GRAVLENS WORK

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  1. GRAVLENS WORK Gravitational Lenses using GRAVLENS |> cout << ”Last updated :” << last_update << “\n”; |> Last updated : October 11, 2006 |> October 2006 Bogdan Popescu

  2. GRAVLENS 1.07 Overview 1 GRAVLENS - Software for Gravitational Lensing by Chuck Keeton for the CASTLES project Software The code comes packaged in a Unix "gzipped tar" file called gravlens.tar.gz. To extract the files, give the commands:gzip -vd gravlens.tar.gztar -xvf gravlens.tarThe package contains two executables: gravlens: A code to perform many basic lensing calculations lensmodel: A code for modeling observed lens systems; contains all the capabilities of gravlens, plus commands to handle many common modeling situations Disclaimer: In general, I believe that the code works correctly. It has been used for several years by different people for different applications, and we have not uncovered any fundamental errors. Nevertheless, I make no guarantee of its accuracy. I encourage you to perform your own tests, and to watch out for results that do not make sense. 1 http://www.physics.rutgers.edu/~keeton/gravlens/ October 2006 Bogdan Popescu

  3. Images – “Strong” and “Weak” Lenses 2 2 Image credit : Jetzer, P. – Gravitational Lensing – in Modern Cosmology, edited by Bonometto, S. et al, 2002 October 2006 Bogdan Popescu

  4. Mass Reconstruction 3(astro-ph/0509252 - P. Schneider) 3 astro-ph/0509252 - P. Schneider October 2006 Bogdan Popescu

  5. GRAVLENS 1.07 4 Some canonical lens models 4 http:// www.physics.rutgers.edu/~keeton/gravlens/manual.pdf October 2006 Bogdan Popescu

  6. GRAVLENS 1.07 4 4 http:// www.physics.rutgers.edu/~keeton/gravlens/manual.pdf October 2006 Bogdan Popescu

  7. GRAVLENS 1.07 – Sample Runs 4 4 http:// www.physics.rutgers.edu/~keeton/gravlens/manual.pdf October 2006 Bogdan Popescu

  8. GRAVLENS 1.07 – Sample Runs GRAVLENS Command File 01.in gridmode 1set ngrid1 = 15set ngrid2 = 25set maxlev = 3startup 1 1alpha 1.4 0 0 0.3 10.0 0.1 -12.1 0.2 0 10 0 0 0 0 0 0 0 0 0plotcrit model1.critplotgrid model1.gridfindimg 0.01 0.01 October 2006 Bogdan Popescu

  9. GRAVLENS 1.07 – Sample Runs GRAVLENS Command file 02.in gridmode 1set ngrid1 = 15set ngrid2 = 25set maxlev = 3startup 1 1nfw 2 0 0 0.01 0 0 0 1 0 00 0 0 0 0 0 0 0 0 0plotcrit model2.critplotgrid model2.gridfindimg 0.10 0.10 October 2006 Bogdan Popescu

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