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still need to figure out how to go from ipython notebooks to a webpage

Guidelines for Tutorials and Snippets

• write it ipython notebook.
• Snippets and tutorials need to be fully runnable
• need to be sure to include relevant version of astropy
• consider highlighting and describing syntax that is very different than IDL syntax. (e.g., https://www.cfa.harvard.edu/~jbattat/computer/python/science/idl-numpy.html)
• PR to main repo and admins will convert to notebook to webpage?
• once webpage exists, send around to astropy-dev and astropy list requesting comments and feedback. Folks can make issues or modifications directly.
• Tutorial should go live as soon as 1-2 people do it. Bar should be lower rather than higher.
• Each new tutorial should be announced via AstroBetter BLOG POST.

Here is a list of ideas for tutorials:

Kelle will make an issue for each of these.

• plot all sky coords = SNIPPET. molleweide projection with RA/DEC.
• dependent on astropy.coords and matplotlib. bit in tutorial needs to be updated.
• ADRIAN
• SNIPPET. read in a list of x,y points (also ra, decs) and plot. with uncertainties.
• sexigesimal-decimal conversions. calculating offsets. epoch and proper motions. COORDS. Jonathan. wait for 0.3.
• how to calc offsets, display segisgesimal formats,
• display an image from a FITS file. oplot point sources. address common MEF issues. write out in various formats. see the "X marks the spot" thread on the astropy list, started by Demitri.
• ginga vs APLpy.
• Eric Jescheke even made a demo:http://mail.scipy.org/pipermail/astropy/2013-September/002737.html
• Kelle - ask Tom R. about bringing APLpy tutorials under astropy umbrella. http://sourceforge.net/apps/gallery/aplpy/ need to be transcribed into ipynb?
• fit a straight line/polynomial/power law/gaussian chi^2 min to a 2D scatter plot. EG: Markwardt fitting table, matplotlib, modeling - NADIA. + staff/student
• SNIPPET: Read a FITS file, edit header and write it back out done. needs to be turned into ipython nb & circulated. JONATHAN.
• SNIPPET: Convert galactic to equatorial coordinates (short) coords. ADAM G. http://nbviewer.ipython.org/urls/github.com/keflavich/astropy-tutorials/raw/0f6febc6ddba0a28546555cba0c228a6264e0c21/tutorials/CoordinateConversion.ipynb
• Big data handling - I have a data file (FITS image, big ascii table) that i want to manipulate that is a few gigabytes...reading it in, not screwing up memory, doing operations, writing it back out again.
• pros and cons vs IRAF vs CASA
• read in FITS in parts. manipulate, write back out in parts?
• ADAM G.
• High level table operations - database-y things.
• table with list of multiple observations for different objects. filter by groups. select based on phot, or calculated operations. TOM A. + someone at CfA
• vo.Cone search within a web hosted table. ~30 services searched by default. -- LIM
• QUANTITIES - computing mass of galaxy given it’s ….ERIK T. + Ana
• TIME - snippet. convert EST to UT to JD. -- WHO?
• Cosmology - SNIPPET. convert redshift to Mpc.-- WHAT, WHO?
• coord matching - cross matching two tables. - ERIK T. + Ana
• py.wcs - NADIA. SNIPPET. load a fits and get WCS out. pixel - RA/Dec. for thousands of point.s

WAITING

• SPECUTILS: interpolation and rebinning. (e.g., increasing sampling of lower-resolution spectrum.)
• SPECUTILS: applying a gaussian filter to spectrum or point source. (e.g. lowering resolution of high-res spectrum.)
• read in, manipulate, plot spectrum from an IRAF FITS file (need header to calc wavelength), SpeX IDL FITS (wavelength & flux & unc.) Measure EW, divide by another spectrum. address common MEF issues. write out in various formats (IRAF, two column). output plot as PDF. - NOT READY
• read in something, converting from mags to fluxes (FUNCTIONALITY NOT WRITTEN), make make SED plot. table (from csv or astroquery), modeling (plank function or two)