Research Techniques in Observational Astronomy (AST 121)
This course is taught by Eric
Jensen in Fall semester 2005, 1:15-4:15 PM Wednesdays
in SC 118.
Assignments
- The thirteenth (and last!) week's assignment, on
adaptive optics.
Some useful links:
-
The McKee-Taylor report, a decadal review of astronomy, with
recommendations for where astronomy should be going in the next 10
years. (Or you can go straight to the executive summary.)
- Adaptive Optics links:
- A very basic overview of the idea of AO.
- The course web page for a
class at UC Santa Cruz
on adaptive optics. Browse through the slides
from the first lecture to get a tour of basic
adaptive optics concepts and facilities.
- A introductory
review article from Science magazine (vol. 262, p. 1345).
This is a good place to go to start getting a bit more than just the
basic concept.
- A
movie showing a star imaged with AO on and with AO off.
- The twelfth week's assignment, on radio and millimeter astronomy with single-dish telescopes.
- The eleventh week's assignment, on
high-energy astronomy. Some useful links:
- The tenth week's assignment (for Nov. 9; PDF format), on infrared astronomy.
- The ninth week's assignment (for Nov. 2; PDF format), on spectroscopy. Note that the image below, originally included as
and example of cosmic ray hits, is relevant for this week as well, since it's an example of what an echelle spectrum looks like on a CCD.
- Some help reviewing for the midterm:
- The seventh week's assignment (for
Oct. 19; PDF format), on telescopes and imaging.
- The sixth week's assignment (for
Oct. 5; PDF format), on photometry.
- The fifth week's assignment (for Sep. 28; PDF format), on determining properties of CCDs.
CCD links:
- A nice web page tutorial
on CCDs by Christy Tremonti at Johns Hopkins,
including
an animation of CCD readout scheme.
- Technical
overview/tutorial on CCDs from a manufacturer, SITe.
- "CCD
University",
a collection of pages explaining various CCD
concepts, from a manufacturer of CCDs, Apogee.
- Detector information from
Dominion Astrophysical Observatory (DAO), to give you an idea of the specs of CCDs
you might find at a (small) modern research observatory.
- CCD images showing cosmic ray hits. The first shows the whole chip, and the second is a zoom to a region about 150x180 pixels.
The bright strips are the spectrum of a star, and the dark bands across the spectra are absorption bands from molecules in Earth's atmosphere.
All the other bright spots are cosmic ray hits. This is from a 30-minute exposure at CTIO.
The expected cosmic ray rate is 100 per minute at CTIO for a 2048x2048 chip.
That would predict about 20 hits in the zoomed image below, which
is about right. (You can count them, compare to the expected mean, and do the Poisson probability yourself!)

- The fourth week's assignment (for Sep. 21; PDF format), on modeling of data, and a first look at the properties of CCDs.
- The third week's assignment (for
Sep. 14; PDF
format), on probability and statistic in astronomy; see also
the following links:
- The second week's assignment (PDF
format), on coordinates and time keeping in astronomy.
- The first week's assignment (PDF
format), on on-line databases in astronomy - see also the list
of links below.
Web resources
Some useful links we discussed in class:
Drop me an e-mail if you
have questions.
Last modified: Tue Nov 22 21:58:46 EST 2005
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