Question

Answer the following multiple choice/True False Questions A) Why are CCD images only approximations to the original scene being imaged by your optics? Circle all that apply a) Each pixel records only the total number of photons, not where in the pixel they arrived. accurately report the actual counts in each pixel. scene which were not sampled by the CCD close the shutter and the time the A/D converter counts the electrons in the b) No A/D converter (regardless of the number of bits it employs) can never c) If the fill factor of your CCD is not, there will be dead spaces in the d Cosmic rays can add counts to your CCD image between the time you pixels. n shades of grey as there are electrons in a ful e There are not as many B) Which of the following CCD image sets are not an example of a data hypercube? a) b) c) d) e) A single image of a star field. A set of images, each taken at a different time. A set of images, each taken through a different filter A set of images taken at different times through different filters. All but a) are examples of data hypercubes. True or False: Consider a color image. A color model for which big counts for a particular color translates into that color being brighter in the color image (when all colors are combined. D) Which of the following types of RAW CCD images contain BIAS counts (circle all that apply)? a)A light image b) A dark image c A flat field image d None of the above E) Which of the following would NOT be considered a source of extraneous counts (circle ? a) A light leak in the camera b) A cosmic ray strike on the CCD c) Radioactive decay of trace elements in the camera body d) Radio interference in the camera's electronics e All the above are sources of extraneous counts. F) True or False: The image of every star in your downloaded CCD image, regardless of its actual brightness in the sky, will have the same FWHM (full width at helf maximum).

Answer 1

Answer A.) Option a and c

Explanation- Both the options are correct for CCD image only being approximate

Answer B) option b and d.

Explanation- A set of image taken at different times and a set of image taken by different filters is not a hypercube

Answer C)False.

Explanation- The given statement is not correct

Answer D) option A and C.

Explanation- A light image and a flat field image do contains BIAS count

Answer E)option C and D

Explanation- The radioactive decay of trace elements and the radio interference in the camera electronic are not considered a source of extraneous count

Answer F) True

Explanation- The given statement is correct