Online Materials needed for ASTR 4610, homework 2
You may find it useful to visit http://iraf.noao.edu
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.
- Zombeck's broad-band reference page.
- Brian Scoggin's tutorial.
- The spectrum of vega.
- Brian's example files hband and H_184.txt
- Bandpass files for B band, V band, and R band.
- FITS format spectra of galaxies: Elliptical, S0, Sa, Sb, Sc, and a Starburst galaxy.
- FITS format spectra of stars of different types:
O5, B5, A5, F3, G0, K0, and an M3.
- FITS format spectra of quasars at different redshifts (z):
0.1, 0.3, 0.5, 0.7, 0.9, 1.1, 1.3, 1.5, 1.7, 1.9, 2.1, 2.3, and 2.5.