1B

B) Skynet Telescopes and CCD Cameras

SKYNET

Josh is the software engineer for Afterglow Access, the image processing program used in this Exploration. Let’s meet Josh in the first video, and then find out about the Skynet Robotic Telescope System in the second video.

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Skynet use anywhere from 10-20 or more more telescopes spread around the world. The use of these telescopes depends on their equipment and software maintenance schedules, and of course, the weather at their location. You can see the “live” telescopes by going to the Skynet site and the appropriate tab.

The original idea was to get a visual on any “gamma ray burst” detected by a gamma ray telescope stationed in space. The system would immediately slew all of its available ground-based optical telescopes to the location of the gamma ray burst. Gamma ray bursts are not that frequent, so most of the telescope time is used by astronomers around the world for their own projects. It is operated out of the University of North Carolina at Chapel Hill. If you are curious, look up what a “gamma ray burst” is.

Use the JOURNAL BOX below to answer these questions. Number each of your answers (you will be using the same journal box for this whole part). Additional research or discussion may be required.

1. What was Skynet’s original purpose?

2. Why are the telescopes spread out around the world?

3. Why are some in the northern hemisphere and some in the southern hemisphere?

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JOURNAL BOX

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1) ACTIVITY: Skynet Telescopes

A) Materials Needed:

a. Tactile world map or globe (could be a simple relief map or relief globe)

b. Some type of tactile marker (anything that sticks) for locations.

c. The list of observatories that are part of Skynet (see below).

B) Procedure:

Look up the locations of each of the following observatories. Place tactile markers on the map or globe at each approximate location. Sighted individuals may appreciate some BVI conditions by using a sleep mask.

A) Athabasca University Geophysical Observatory

B) Athabasca University Geophysical Observatory II

C) Banner Creek Observatory

D) Perth Observatory

E) Cerro Tololo Inter-American Observatory

F) Dark Sky Observatory

G) Dolomiti Astronomical Observaotry

H) Fan Mountain Observatory

I) GORT

J) Mars Desert Research Station

K) Meckering Observatory

L) Morehead

M) Green Bank Observatory

N) Northern Skies Observatory

O) Shed of Science Observatory

P) Siding Spring Observatory

Q) Yerkes Observatory

IDATA currently uses one of the telescopes at Cerro Tololo Inter-American Observatory, the Yerkes 24 inch, and a telescope at Meckering Springs (the number of telescopes available to IDATA can change). Find these on the globe or map.

Using the same JOURNAL BOX from above, answer the following questions.

4. What hemisphere is the Cerro Tololo observatory in?

5. What does longitude mean? (There will be more on this later)

6. What is the longitude of the Cerro Tololo observatory?

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2) CCD CAMERAS

What happens to the light collected by the telescope? How can it be used for research?

The activity on CCD cameras, at the beginning of this Exploration, is very important. Please make sure you have done it. The link below will take you to the resource if you have not yet done it. The resource provides an accessible hands-on activity which either uses a 16x20inch foam poster board for a classroom demo (or an 8.5 x 11 piece of cardstock for an individual demo) with a 3×3 grid on it to represent the pixels of a camera, foam stickers (or gemstone stickers) of different shapes to represent photons of light, and white map pins (or white sticky or clear gemstones) to represent electrons knocked off the detector (pixel) by the photons. The number of pins is the number of “counts” recorded in the computer for that pixel. The resource has images of the finished products if you find that helpful. Again, the link is here for the resource:

It might be helpful to look at one of the finished models from the CCD Camera activity while listening to Dr. Harper review the CCD camera in this 3:05 video.

Answer the following questions using the same JOURNAL BOX you used for questions 1-6:

7. What part of your eye acts like a light “detector” or pixel?

8. How does Dr. Harper simulate measuring the number of electrons each detector (pixel) has collected?

9. Why is it impractical to collect light one pixel at a time?

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