M51 at z = 0.1: Difference between revisions
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This tutorial presents a simulation of ALMA observations of a well-known galaxy, M51, as it would be observed at redshift z = 0.1. | This tutorial presents a simulation of ALMA observations of a well-known galaxy, M51, as it would be observed at redshift z = 0.1. | ||
The goal of this tutorial is to provide a ''complete'' run-through of a relatively simple simulation. Included in this simulation are the effects of (u, v) sampling of a 50-antenna ALMA and thermal noise levels appropriate for the ALMA site. | The goal of this tutorial is to provide a ''complete'' run-through of a relatively simple simulation. Included in this simulation are the effects of (u, v) sampling of a 50-antenna ALMA, the primary beam of the ALMA antennas, and thermal noise levels appropriate for the ALMA site. Calibration overheads are not included, nor is phase noise owing to a varying troposphere. As such, this simulation should be viewed as somewhat optimistic. | ||
For this tutorial, we'll use the [http://nedwww.ipac.caltech.edu/level5/March02/SONG/SONG.html BIMA SONG] observations of M51 as the basis for the model. Grab the file [http://nedwww.ipac.caltech.edu/level5/March02/SONG/NGC5194.bima12m.cm.fits.gz NGC5194.bima12m.cm.fits.gz] and uncompress it in a working directory. | |||
<source lang="bash"> | |||
# in bash (or other unix shell) | |||
gunzip NGC5194.bima.12m.cm.fits | |||
</source> | |||
=== Cosmology Calculations === | === Cosmology Calculations === | ||
Revision as of 10:49, 29 April 2010
This article is under construction. Watch this space!
Overview
This tutorial presents a simulation of ALMA observations of a well-known galaxy, M51, as it would be observed at redshift z = 0.1.
The goal of this tutorial is to provide a complete run-through of a relatively simple simulation. Included in this simulation are the effects of (u, v) sampling of a 50-antenna ALMA, the primary beam of the ALMA antennas, and thermal noise levels appropriate for the ALMA site. Calibration overheads are not included, nor is phase noise owing to a varying troposphere. As such, this simulation should be viewed as somewhat optimistic.
For this tutorial, we'll use the BIMA SONG observations of M51 as the basis for the model. Grab the file NGC5194.bima12m.cm.fits.gz and uncompress it in a working directory.
# in bash (or other unix shell)
gunzip NGC5194.bima.12m.cm.fits
