Difference: CookBook2dfdr (4 vs. 5)

Revision 52007-01-19 - RonHeald

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CookBook for AAOmega data reduction with 2dfdr

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AAOmega data is processed using a revised version of the 2dfdr software package. 2dfdr currently has modes which reduce data for a number of instruments, AAOmega with the 2df and Spiral IFU top ends, 2dF, 6dF, FMOS and the older Spiral. In upgrading the software to work with AAOmega data a number of fundamental changes to the software have been required. At this time, the full 2dfdr manual (Word

, pdf

) is somewhat out of date and does not cover the modifications and improvements. This CookBook is aimed at providing a basic introduction to the reduction process. An updated manual will be available shortly. In the mean time, please contact your support astronomer with any questions about the software or problems with data reduction.

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AAOmega data is processed using a revised version of the 2dfdr software package. 2dfdr currently has modes which reduce data for a number of instruments including AAOmega with both the 2df and Spiral IFU top ends, 2dF, 6dF, FMOS and the older Spiral. In upgrading the software to work with AAOmega data a number of fundamental changes to the software have been required. At this time, the full 2dfdr manual (Word

, pdf

) is out of date and does not cover the modifications and improvements. This CookBook is aimed at providing a basic introduction to the reduction process. An updated manual will be available shortly. In the mean time, please contact your support astronomer with any questions about the software or problems with data reduction.

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Installing the software

To install the software, download and unpack the relevant .tgz file from the ftp site. Noting the path to the unpacked directory (2dfdr-linux_x86 for the RH3E version) first set an environment variable, then source the setup script : setenv DRCONTROL_DIR /path/ source $DRCONTROL_DIR/2dfdr_setup

Run the software with

drcontrol aaomega.idx &

Where aaomega.idx is the generic AAOmega setup file. A number of specific .idx files are available (e.g. aaomega580V.idx, aaomega385R.idx) for individual gratings.

Download the software

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2dfdr is rapidly evolving as more is learned about AAOmega data. The high quality of AAOmega spectra, in comparison to what was achievable with the older 2dF spectrograph (which was, it must be stressed, principally designed to record low resolution redshifts of bright galaxies) means that there are many improvements required in the reduction system to do justice to the data recorded with AAOmega. The user should check the AAOmega software web page before starting a campaign of data reduction to ensure they have the every latest version of the software. This rate of evolution will deminish once a small number of outstanding issues are addressed.

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2dfdr is rapidly evolving as more is learned about AAOmega data. The high quality of AAOmega spectra, in comparison to what was achievable with the older 2dF spectrograph (which was, it must be stressed, principally designed to record low resolution redshifts of bright galaxies) means that there are many improvements required in the reduction system to do justice to the data recorded with AAOmega. The user should check the ftp site below to ensure they have the every latest version of the software before starting a campaign of data reduction. This rate of evolution will deminish once a small number of outstanding issues are addressed.

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The software is only available as a set of binary executables, and the source code is not readily available to the public. The system is created with the Starlink software library and cannot be built without a Starlink installation. While this software is not proprietary, we cannot support external builds at this time. With the demise of the Starlink project in 2005, it may become necessary to remove the Starlink components in the future.

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The software is only available as a set of binary executables. The system is created with the Starlink software library and cannot be built without a Starlink installation. While this software is not proprietary, we cannot support external builds at this time. With the demise of the Starlink project in 2005, it may become necessary to completely remove the Starlink components in the future.

The executables are currently only available for the RedHat Enterprise3 Linux. This system has been tested and works well under current implementations of RedHat Enterprise4 and most installations of Fedora, Scientific Linux and other popular flavors. Spme problems have been tracked to older Tcl libraries being used. Limited support can be offered for other operating systems. A Solaris version can be made available on request, but due to speed problems is unlikely to receive much use. A version for Mac OSX is not available at this time due to complications with running elements of the Starlink libraries on the Mac.

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1. The software will not run correctly if the path to the executables is to long (greater than 40 characters). The error means that 2dfdr will appear to start okay, but on attempting to plot data the system will report that it cannot find the xwindow to display to.

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2. A bug in the STARLINK ndf2fits routine means that the software will not run correctly when using .ndf as the output file type. Until this is corrected it is suggested that .fits is used as the output file type.

Note for users using Linux : You may have problems trying to reduce data on SUN/Solaris disks running 2dfdr under Linux: 2dfdr may simply fail giving an error message like this: "Task drexec2 has crashed while executing an action" This seems to be a problem related to accessing data over NFS between SUN and Linux machines. We don't have a solution for this, but the workaround is to copy the data to a local Linux disk, and reduce from there.

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-- RonHeald - 18 Jan 2007

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-- RonHeald - 19 Jan 2007

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