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Cover Page The following handle holds various files of this Leiden University dissertation: http://hdl.handle.net/1887/79263

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Cover Page

The following handle holds various files of this Leiden University dissertation:

http://hdl.handle.net/1887/79263

Author: Retana Montenegro, E.F.

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Propositions accompanying the thesis

Faint Quasars at Very Low Frequencies

1. Radio-loud quasars are dierent from their radio-quiet counterparts, at least in terms of the masses of their host dark matter haloes. (Chapter 2)

2. Deep radio imaging with LOFAR is possible. (Chapter 2)

3. Deep 150 MHz LOFAR source counts present a attening below sub-mJy ux densities, and agree well with previous measurements from high- and low-frequency surveys. (Chapter 3)

4. Quasars can be selected eciently combining optical/infrared colors with LO-FAR observations. (Chapter 4 & 5)

5. Pushing the ux density limits of astronomical suveys with deep observations is rewarded with the unique opportunity to investigate in detail for the rst time an unexplored parameter space.

6. To increase the eciency and productivity of scientic meetings, they should be limited to persons with common research interests, or working towards similar goals.

7. PhD students should spend more time on the analysis and interpretation of the data, rather than their reduction and processing.

8. Every department of Astronomy should increase the eorts to include minori-ties in all aspects of research.

9. Mutual respect between members of a research group is essential to establish functional interpersonal relations within the team.

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