CCD Photometry with Pyraf
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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:
http://iraf.noao.edu/iraf/ftp/iraf/docs/ccduser3.ps.Z
Photometric Reduction Project (20% of your final exam)• Your individual account was created in space.physast.uga.edu
isong@uga.edu 810-12-3456o userid: from your Oasis email address “isong”o 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.
Standard Fields
• Check the “StandardFields.pdf” file in the data directory
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
A
B
CD
A Quick Tutorial on Pyraf
1. starting Pyrafmkiraf (only once) in your working directory choose ‘xgterm’type ‘pyraf’
2. editing, displaying, dumping parameters: epar, lpar, dpar3. start ds94. load packages in pyraf : imred ccdred and digiphotapphot5. some useful commandsimheadccdlist
6. setting up instrument efosc.cl, efosc.dat, subsets7. CCD preprocessing
zerocombine, flatcombine, ccdproc, badpixel image creation, etc.8. Doing an aperture photometry
qphot
Badpixel correction will be done by a separate python routine.
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