Image Info

Submitted by Dane Toler,
HOU Teacher and TRA

Here a little question sheet that uses the IMAGE INFO function. We
felt this gave teachers (in a workshop) a way to look through the image info
and see what’s there.

Open HOU image processor and load the image Browser 4.


Part I

For the image determine the size of the nebula along each of the vertical and
horizontal axes. Express your answers in meters and light years. Show your
work. Don’t forget to carry units in the calculations and watch those sig figs!

Part II

When you work with an image it is often useful to know or check information about the image. On the DATA TOOLS menu, there is an option IMAGE INFO. Use this option to answer the following questions about this image.

  1. Identify this object. (Catalogue listing)
  2. What CCD was used to take the image?
  3. What telescope took the picture?
  4. What are the right ascension and declination of this object? Is it visible
    in the evening sky now? Is it well positioned for an image at midnight tonight?

  5. On what date and at what time was the image taken? Give your answer
    in universal time and in Hawaiian Time.
  6. Is this a 16 bit or 32 bit image?
  7. What focus was used for the exposure?
  8. What was the start time of the exposure?

OR DO IT THIS WAY


Open HOU image processor and load the image Browser 4. When you work with an image it is often useful to know or check information about the image.
On the DATA TOOLS menu, there is an option IMAGE INFO. Use this option to
answer the following questions about this image.

  1. Identify this object. (Catalogue listing)
  2. What CCD was used for the exposure
  3. What telescope took the picture?
  4. What are the right ascension and declination of this object? Is it visible
    in the evening sky now? Is it well positioned for an image at midnight tonight?
  5. On what date and at what time was the image taken? Give your answer
    in universal time and in Hawaiian Time.
  6. Is this a 16 bit or 32 bit image?
  7. What focus was used for the exposure?
  8. At what time (UT) did the exposure start?
  9. What does CFHT stand for?

Bonus: How far (in RA) from the prime meridian was the object when the
picture was taken?


Part III


Go to the HOU Website and download from the Leuschner Observatory the image
of NGC 6720 in the nebulae image files. The plate scale for this telescope
is 0.67/pixel. Determine the dimensions the nebula . Express your answers
in meters and light years. Show your work. Don’t forget to carry units in
the calculations.

 

 

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