Magnetic Surveys 1

The WENSS & Dwingeloo surveys and the Galactic magnetic field

Aims. We investigate the structure of the Galactic magnetic field in the 2nd Galactic quadrant using radio continuum polarization data from the 325 MHz WENSS (WEsterbork Northern Sky Survey) survey in combination with earlier single-dish observations. Methods. We study gradients in polarization angle along Galactic longitude and latitude in the region 130 • l 173 • and −5 • b 31 •. These gradie...

Analysis of Large - Scale Social Surveys 1

Large-scale social surveys are an important source of information for a wide range of topics. In analyzing such surveys, it is important to be aware of the complexity of the sampling design and the data adjustments that are used by survey organizations, including weighting to adjust for diierences between sample and population and imputation to ll in missing responses. For estimating population...

– 1 – Magnetic Monopole Searches

“At the present time (1975) there is no experimental evidence for the existence of magnetic charges or monopoles, but chiefly because of an early, brilliant theoretical argument by Dirac, the search for monopoles is renewed whenever a new energy region is opened up in high energy physics or a new source of matter, such as rocks from the moon, becomes available [1].” Dirac argued that a monopole...

Orthogonal polarization approach for three dimensional 1 georadar surveys

Ultrasoft Narrow - Line Seyfert 1 Galaxies and X - ray Surveys

We describe how recent X-ray surveys have led to advances in the understanding of ultrasoft narrow-line Seyfert 1 galaxies. The number of known ultrasoft narrow-line Seyfert 1s has increased greatly in recent years due to X-ray surveys, and it is now possible to obtain high quality 0.1–10 keV spectral and variability measurements for a large number of these galaxies. We generalize some of the c...