The common astronomy software applications casa package being developed by nrao and alma will be used for offline reduction and analysis of both alma and evla data. Follow the obtaining casa link for the latest installation packages. Note that the imaging presented in this guide uses the new calibration using casa 4. The national radio astronomy observatory nrao designs, builds, and runs the worlds most sophisticated radio. For all other enquiries including evla related inquiries use the nrao helpdesk. Jansky very large array vla of the supernova remnant 3c 391. This task handles continuum images and spectral line cubes, supports outlier fields, contains standard clean based algorithms along with algorithms for multiscale and wideband image reconstruction, widefield imaging correcting for the wterm. Use the checkboxes to select files of interest and hit download selected. The mac download is a zip archive which must first be opened in order to extract the installer. This will often be done automatically for you or a suitable program will be suggested archive utility. This is a webbased collaboration area for use by both nrao and our colleagues who use casa external meetings. Doubleclick the casa application to run it for the first time. Login computing guide astronomy support cluster processing casa guides cluster scheduler cv lustre quick guide cv.
Download the casa disk image for your os version from our download site open the disk image file if your browser does not do so automatically. The alma science pipeline has been developed with the goal of performing automated data processing before delivery to the user. Try decreasing minbeamfrac to remove fewer regions. The alma qa2 data reduction team performs for each alma science data set a detailed analysis to confirm that the observations have achieved the science goals requested by the pi. In parallel to this user survey, we have also analyzed statistics of all casa labeled tickets from the nrao and alma helpdesks over the course of the last 10 months. Astronomy software applications casa package can be downloaded from nrao. Registering will allow us to respond to defects and let you know when updates are. It performs alma interferometric and singledish data endtoend processing calibration and imaging. Download gratuit chronic prezinta subsemnatu in casa. The nrao users committee recommended that the visibility of the casa news be improved by distributing this issue to all nrao enews subscribers. Start casa by typing casa on a terminal command line. The final report on 31dec18 is available as 31dec18 aips letter dated 31 december 2018 ps, 8022909 bytes. The national radio astronomy observatory is a facility of the national science foundation operated under cooperative agreement by associated universities, inc. Synopsis radio interferometric image reconstruction description form images from visibilities and reconstruct a sky model.
The frequency support column now also contains the linesensitivities of the spectral windows at native resolution and at 10kms. This guide gives a first look at imaging and image analysis in casa. Only residuals will be processed to form the output restored image. Casacore is now part of debian and ubuntu, use apt to. Drag the casa application to the applications folder of your hard disk. If you would like to receive casa support, please register for access to the nrao portal my. The national radio astronomy observatory nrao is a federally funded research and development center of the united states national science foundation operated under cooperative agreement by associated universities, inc for the purpose of radio astronomy. The combined regional alma help desks resolved a similar amount of userreported tickets related to casa. The casa docs will eventually replace the multiple historical sources of casa documentation. The following information is likely outdated but could still be helpful if you want to install casa on nonredhat platforms. The user survey should continue, and efforts should be made to maintain and. This document describes the final science data products that are delivered to pis and the archive at the end of the qa2 process. Note that the vla pipeline is accommodated in the casa 5. It is available for installation for a while and is the last intelcompiled version for macs.
Casa common astronomy software applications is a comprehensive software package to calibrate, image, and analyze radio astronomical data from interferometers such as alma and vla as well as single dish telescopes. E special considerations for evla data calibration and. Founded in 1956, the nrao provides stateoftheart radio telescope facilities for use by the international scientific community. Download the casa disk image for your os version from our download site. Asiaa casa development center acdc acknowledges the grant from the.
First variant pilot pushed to the download site remaining tasks. Users of this os must use the tarball installation. If your download fails, you will probably be told erroneously by email that it worked. National radio astronomy observatory nrao information. The national radio astronomy observatory nrao designs, builds, and runs the worlds most sophisticated radio telescopes for scientists to study the sun, planets, solar system, distant stars, galaxies, black holes, and other mysterious objects millions to billions of lightyears away. Alma pipeline team, 2016, alma science pipeline users guide, alma doc 4. This casa guide describes the calibration and imaging of a multiplepointing continuum data set taken with the karl g.
Nrao designs, builds, and operates its own high sensitivity radio telescopes for use by scientists around the world. Casa is supported on two different helpdesk platforms. If the optimal size of your mosaic is not square, you must use casa 5. The data were taken in early science sharedrisk observing mode, with 128 mhz of bandwidth in each of two widely spaced spectral windows, centered at 4. Called casa docs, the new system is available online and is packaged with each casa build for convenient offline use. That time assumes that your download job is the only one being performed. Cuc 2018 report response v1 national radio astronomy. Nrao unm astrophysics seminar november 3, 2011 7 1 can load data directly into casa or make uvfits file for aips. Nrao and alma help desks another valuable resource for both users and the casa team are the nrao and alma help desks. Helpdesk tickets will be directed to the appropriate alma re gional center at eso, naoj or nrao. In this case, no cleaning is done, a dirty cube is generated, and tclean is exited. Open the disk image file if your browser does not do so automatically.
To understand the differences between clean and tclean, please see the guide. If you have not used casa before, some helpful tips are available on the getting started in casa page this guide has been written for casa version 5. The national radio astronomy observatory nrao designs, builds, and runs the worlds most sophisticated radio telescopes for scientists to study the sun. Nrao newsletter national radio astronomy observatory.
National radio astronomy observatory national radio. A major rework of the casa documentation is underway, and is planned to be released with the casa 5. If this changes in the future then we will reevaluate the public email avenue. This is usually the directory containing your checked out copy of casacore, code, gcwrap, etc download buildtoolwrappersx. Since dec 2009 in public release under gpl anybody can download, no warranty. Science pipeline users guide, casa documentation and descriptions of the alma quality assurance for data products. The departments that deal with casa problems are data processing alma and casa nrao. To date, the email traffic is very small and would not skew helpdesk statistics. The ot installer currently does not work on the latest version of mac os i.
If you encounter difficulties, please see our list of known problems. The qa2 status information in the result list has been corrected. The common astronomy software applications casa package version 4. This wiki provides tutorials for reducing data in casa. Examples for using the new tclean casa task for alma imaging. For alma related casa questions, please go to the alma helpdesk. It is also available gzipped, 1008277 bytes and pdf, 244403 bytes.
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