Sumários

Telescopes - problem sheet 2 (continued)

20 Outubro 2020, 12:00 • André Maria da Silva Dias Moitinho de Almeida

Work on problem sheet: Telescopes-2

Telescopes, instruments and astronomical observatories (or instruments and technologies for astronomical observation)

20 Outubro 2020, 11:00 • André Maria da Silva Dias Moitinho de Almeida

- What does a telescope do?
- Collecting area and its effect on light concentration and resolution. Diffraction limit concept.
- Refracting telescopes
- Effects of the atmosphere in the acquisition of spatial images: Turbulence; absorption; reddening
- Compensate for the effect of turbulence: Adaptive optics (introduction)

Further reading:
Chap 2 and 3 of McLean (Electronic Imaging in Astronomy)

CCD image processing (Part III)

15 Outubro 2020, 09:30 • André Maria da Silva Dias Moitinho de Almeida

- Explanation of the CCDPROC task parameters. Explanation of the different image combination algorithms with outlier rejection.

:: Image processing:- Definition of the geometry of the overscan area and the data area.
- Calculation and correction of the overscan level. Examination of processed images
- Combination of bias images into a master bias. Comparison of the combined image with the individual ones (noise reduction).

Instruments

15 Outubro 2020, 08:30 • André Maria da Silva Dias Moitinho de Almeida

::Instruments
- Photometers and cameras
- Spectrographs
- Polarimeters
- Interferometers

:Beyond basic CCD use
- Mosaics
- "Binning". Reasons, advantages and disadvantages. Differences in load transfer / Acquisition / reading

Further reading
Chap 5 of McLean


Telescopes - problem sheet 2

13 Outubro 2020, 12:00 • André Maria da Silva Dias Moitinho de Almeida

Work on problem sheet: Telescopes-2