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CCD Photometry with Pyraf

CCD Photometry with Pyraf. ASTR 3010. Useful Tutorials. IRAF Aperture Photometry Tutorial: www.astro.washington.edu/courses/astro480/IRAF/iraf4_tutorial.pdf IRAF Beginner’s Guide: http://iraf.noao.edu/iraf/ftp/pub/beguide.ps.Z IRAF CCD Reduction Tutorial:

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CCD Photometry with Pyraf

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  1. CCD Photometry with Pyraf ASTR 3010

  2. Useful Tutorials • IRAF Aperture Photometry Tutorial: www.astro.washington.edu/courses/astro480/IRAF/iraf4_tutorial.pdf • IRAF Beginner’s Guide: http://iraf.noao.edu/iraf/ftp/pub/beguide.ps.Z • IRAF CCD Reduction Tutorial: http://iraf.noao.edu/iraf/ftp/iraf/docs/ccduser3.ps.Z

  3. Photometric Reduction Project (20% of your final exam) • Your individual account was created in space.physast.uga.edu isong@uga.edu 810-12-3456 • userid: from your Oasis email address  “isong” • passwd: temporary passwd 810123456  Upon 1st login, you will be asked to reset your password. • CCD data are available in /home/astr3010/ImagingData • BVI band photometric data with DOME flats, Sky flats, and Biases. • 3 standard star fields.

  4. Standard Fields • Check the “StandardFields.pdf” file in the data directory

  5. Science Field (D42, D44, D45) • You need to measure B, V, I magnitudes (or upper limits) of following four stars: A, B, C, D • Submit reduced FITS files and photometry result. • Due Date: Dec 2, 2010 C D A B

  6. A Quick Tutorial on Pyraf • starting Pyraf mkiraf (only once) in your working directory  choose ‘xgterm’ type ‘pyraf’ • editing, displaying, dumping parameters: epar, lpar, dpar • start ds9 • load packages in pyraf : imredccdred and digiphotapphot • some useful commands imhead ccdlist • setting up instrument efosc.cl, efosc.dat, subsets • CCD preprocessing zerocombine, flatcombine, ccdproc, badpixel image creation, etc. • Doing an aperture photometry qphot Badpixel correction will be done by a separate python routine.

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