Monday, December 15, 2008

Importing Miriad files into AIPS

A question from Danny:

Hello AIPS ninjas.

Is there any way to import miriad *.uv files -the kind that are whole directories full of binary files- into AIPS?


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Wednesday, December 10, 2008

Kvis & AIPS awesomeness!

You can use kvis to view your AIPS images directly! See below for more details. Thanks to Bryan Gaensler for this awesome tip.

The program kvis is an image viewer that is part of the karma image analysis package. An undocumented, but cool feature of this program is that if you navigate to your AIPS data directory (typically somewhere like $AIPS_ROOT/DATA/LOCALHOST_1) in the kvis file selector you will see each AIPS image file with its correct name (instead of crytic filenames like FQD001001.099;) and be able to click on them and view them. Once you've got then in kvis, you can even save to FITS.

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Friday, December 5, 2008

Missing Scans!

I'm reducing some EVLA-VLA data, and I discovered that one of the calibrator scans was missing in the data. It was listed in the "scan list" on the archive and the observe files were (to the best of our knowledge) correct. After emailing the analysts, we figured out that the scan was flagged by the online flagger. You can read in the data without applying these online flags using CPARM(3) = 16.

I'm still trying to figure out why it was flagged, and I'm assuming that this information is stored in the "OF Table" extension. However, I haven't been able to find any information on that table using google (googling "aips 'OF table'" doesn't really work because you get a lot of pages with properties of tables, not info about the OF table).

I'll post what I learn about this (if anything), but it's something to keep in mind if you find yourself missing scans..

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