Online Materials needed for ASTR 4610, homework 2

You may find it useful to visit which documents iraf and has general iraf tutorials. Besides SBANDS, you might find other tasks useful, e.g., SPLOT (for looking at the spectra), LISTPIX with coordinates set to "world" (for making data files to plot with sm), MKSPEC or ARTDATA.MK1DSPEC (for making blackbody spectra -- the latter is preffered) , SINTERP (for taking ascii files and converting them into fits spectra). Remember, IRAF has help files! Note also that some of these spectra do not have realistic flux scales -- this should not pose a problem for computing color indices. If you have questions about something we have not covered yet in class (e.g., quasar redshifts) please bring it up during class.

You might find it useful to make extra plots that I have not explicitly asked for. For instance, plotting the band responses on top of plots of the various spectra may help you understand what is happening in the color-color diagrams. Please turn these in as well if they help illustrate your answers.