http://alma-allegro.nl/allegrowiki/ 2026-04-30T22:21:03+00:00 http://alma-allegro.nl/allegrowiki/ http://alma-allegro.nl/allegrowiki/lib/exe/fetch.php?media=wiki:logo.png text/html 2021-08-24T11:28:10+00:00 Anonymous (anonymous@undisclosed.example.com) http://alma-allegro.nl/allegrowiki/doku.php?id=allegrodrc:datacomb&rev=1629804490&do=diff CASA Guides for combining Interferometric data: * Data Weights and Combination * Combining 7m+12m data: M100 - CASA 4.3.0 * VLA Data Combination - CASA 5.7.0 Literature relevant to Data Combination: * PHANGS–ALMA Data Processing and Pipeline * 1995AJ....110.2037J - Relevancy: Flux Determination from Multiconfiguration Data (VLA) text/html 2021-01-12T09:13:07+00:00 Anonymous (anonymous@undisclosed.example.com) http://alma-allegro.nl/allegrowiki/doku.php?id=allegrodrc:ephemeris&rev=1610442787&do=diff Ephemeris Objects A good introduction into how ephemeris objects have to be treated in CASA can be found in Section 4.7.11 Manipulation of Ephemeris Objects in the CASA Cookbook. However, in some cases the explanation is not elaborate enough, in particular when it comes to getting ephemeris data from objects that do not have a JPL catalog number (e.g., comets). text/html 2021-08-24T11:00:50+00:00 Anonymous (anonymous@undisclosed.example.com) http://alma-allegro.nl/allegrowiki/doku.php?id=allegrodrc:index&rev=1629802850&do=diff Welcome to Allegro Data Reduction Cookbook’s documentation! Contents: * Ephemeris Objects * Self-Calibration * Speeding up your Image Analysis * Data Combination text/html 2021-01-12T11:58:21+00:00 Anonymous (anonymous@undisclosed.example.com) http://alma-allegro.nl/allegrowiki/doku.php?id=allegrodrc:selfcal&rev=1610452701&do=diff #VIO: NEEDS UPDATING Self-Calibration Introduction The Need for Selfcal In the classical calibration scheme, observations of your science target are always bracketed by observations of a gain calibrator. This calibration source will in most cases be an unresolved point source, for which we get uniform visibilities with a phase of zero (the amplitude is not important for the moment). This enables us to follow the varying phase with time with the aim of zeroing the phase for our observations.$g… text/html 2021-01-12T11:13:09+00:00 Anonymous (anonymous@undisclosed.example.com) http://alma-allegro.nl/allegrowiki/doku.php?id=allegrodrc:speed&rev=1610449989&do=diff Speeding up your Image Analysis Binning in Time TDM data has a default integration time of 2 seconds, FDM data has 6 seconds. That means that you quickly build up a lot of data, which can be significantly reduced by suitable pre-averaging. Usually, binning in time is a good idea (unless you want to have self-calibration solutions on very short timescales). This can be done by splitting out data, using the