: Astronomical Laboratory
Prof. Leslie Looney
lwl @ illinois . edu
Welcome to the Astronomical Laboratory
This course is intended to be a hands-on introduction to the practice of astronomy, including setting up astronomical instruments
for CCD imaging and spectroscopy to make analytical analysis of astrophysical problems.
Labs will be conducted by small groups (3-4) of students. Because
of the diversity of the laboratory activities and the need for good weather for observations, along with the constraint
of telescope availability, labs will be conducted by students on their own schedule and in a
difference sequence by each group, with some ordering restrictions.
There are four labs over the semester.
Short write-ups (written in the general style of the Astrophysical Journal) will be required for
each lab, but for the first three labs they will be short and not referenced.
The length of the write up will depend on the lab. The 4th lab should have some general references, cited in the ApJ style.
Each student must submit their own lab and as their own work.
Lab 1: Due Sept 17th
Naked eye tour. Make sure telescope is properly aligned. Then, choose 4-5 sources to observe by eye. Explain the emission
process (i.e. why do you see them). A simple lab report per person with hand-drawn sketches are turned in. See the lab sheet on Compass.
Lab 2: Due Sept 24th
Use the CCD camera to make a three color image of an extended source.
Lab 3: Due Oct 8th
Use the spectrometer to take a spectrum of an object. Could be the hardest lab.
Lab 4: Proposal Due Oct 15th and Lab Due Nov 19th
Write a proposal to observe something interesting astrophysically. I will review the proposals and approve them. The project should include some numerical calculation
of some type. Then observe the project. Report shoudl include references to papers that have done similiar things or same object.
Use ADS to find papers. Remember you have to be on Illinois subnet to get newer papers for free.
Some possible projects:
- Characterization of the CCD camera. Measure the properties of the CCD, predict the performance with time, filter, and object.
Evalute varying data reduction techniques. Evaluate observational setups.
- Compare regular images of stars to AO images. How is the image improved? What physical parameter? The SBIG AO device uses tip tilt. Why does tip/tilt improve an image?
- Take near diffraction limited images of a planet using the fast USB camera. Make sure to shift and add.
Compare the short integrations to long integrations. Why is there a difference?
- Make a CCD image (any filter) of any sky object. Explain the emission process. Discuss any reasons for extinction.
- Make a CCD color image of a nebula. Play with the color mapping. What are the options for making a color image?
How does the color mapping affect the scientific potential? Compare to an image in H-alpha, OIII, or SII.
- Observe a giant planet over many weeks and make an image of the moons. What are their periods?
What can we learn from these images?
- Observe the spectra of a small sample of stars with different spectral classes. Compare and contrast. Why are they different?
- Observe the light curve of a variable star. (Hint, make sure to observe a source with an appropriate period.)
Calculate the period and discuss any issues with the measurements.
- Observe an optical binary. (Hint, make sure to observe a source with an appropriate period.) From multi-epoch observations, derive the period. Discuss any issues with the measurements.
- Observe a galaxy and derive redshift. Is it a peculiar velocity?
- Observe a transiting planet. Can you detect the change in light?
- Observe a star cluster. Place the stars on an HR diagram. Estimate the age of the cluster.
- Spectral observations of Planets or Comets. Image CO2 in the atmosphere of Venus, ammonia or H2 in the atmosphere of Jupiter,
or numerous bands in bright comets (if one is available), such as CN, CH, C2, C3, and NH2.
Credit Hours and Exclusions:
This course gives 2 hours credit.
Students should be seniors with at least one 400-level astronomy courses completed.
There will be no textbook for this course. Students will be provided with a "lab manual" of sorts which
describes only the basic principles of the experiments, and some tips on what internet resources, journal articles, and
monographs to consult to figure out how to make the experiments work. But on the whole, students will be left to
their own devices (of course, with guidance from the professor as needed) so they will have an authentic
The course will not have formal lectures or discussion periods. Students will work on the
experiments on their own schedules, which is necessary due to limited experimental resources and good weather.
Students will be evaluated by a combination of the short reports on the first three labs (70%),
a proposal and report for the fourth lab (20%), one HW assignment (2%), and
on the student's effectiveness in the laboratory as judged by the professor and their lab partners (8%).
Academic Integrity and Collaborative Work:
Academic honesty is essential to this course and the University. Any
instance of academic dishonesty (including but not limited to cheating,
plagiarism, falsification of data, and alteration of grade) will be
documented in the student's academic file. In addition, the particular
report will be given a zero.
Guidelines for collaborative work: although the data and data reduction must be
done in groups, each student is expected to do
his or her own work and is responsible for their own reports.
For further info, see the Student Code, Part 4. Academic Integrity, at
To insure that disability-related concerns are properly addressed
from the beginning, students with disabilities who require reasonable
accommodations to participate in this class are asked to see the
instructor as soon as possible.
Last modified: Friday, 21-Aug-2015 10:41:57 CDT