Zobrazeno 1 - 10
of 36
pro vyhledávání: '"George, Samuel J."'
Autor:
Avison, Adam, George, Samuel J
Publikováno v:
European Journal of Physics, Volume 34, Number 1, 2013
We present a graphical interface designed to demonstrate the techniques of radio interferometry used by telescopes like ALMA, e-Merlin, the JVLA and SKA, in a manner accessible to the general public. Interferometry is an observational tech- nique use
Externí odkaz:
http://arxiv.org/abs/1211.0228
Autor:
George, Samuel J., Stevens, Ian R.
We present radio observations of the magnetic chemically peculiar Bp star HR Lup (HD 133880) at 647 and 277 MHz with the GMRT. At both frequencies the source is not detected but we are able to determine upper limits to the emission. The 647 MHz limit
Externí odkaz:
http://arxiv.org/abs/1206.1155
GALFACTS is a large-area spectro-polarimetric survey on the Arecibo Radio telescope. It uses the seven-beam focal plane feed array receiver system (ALFA) to carry out an imaging survey project of the 12,700 square degrees of sky visible from Arecibo
Externí odkaz:
http://arxiv.org/abs/1111.4890
Autor:
George, Samuel J., Stevens, Ian R.
In this paper we present follow-up optical observations of Ultra Steep Spectrum sources that were found by matching 150 MHz GMRT sources with either the 74 MHz VLSS or the 1400 MHz NVSS. These sources are possibly high-redshift radio galaxies but opt
Externí odkaz:
http://arxiv.org/abs/1110.2467
Detection thresholds in polarized intensity and polarization bias correction are investigated for surveys where the polarization information is obtained from RM synthesis. Considering unresolved sources with a single rotation measure, a detection thr
Externí odkaz:
http://arxiv.org/abs/1106.5362
Autor:
George, Samuel J.
Publikováno v:
Phys. Educ.46:403-406, 2011
The field of extrasolar planets is still, in comparison with other astrophysical topics, in its infancy. There have been about 300 or so extrasolar planets detected and their detection has been accomplished by various different techniques. Here we pr
Externí odkaz:
http://arxiv.org/abs/1103.5690
Autor:
Banfield, Julie K., George, Samuel J., Taylor, A. Russ, Stil, Jeroen M., Kothes, Roland, Scott, Douglas
The Dominion Radio Astrophysical Observatory Deep Field polarization study has been matched with the Spitzer Wide-Area Infrared Extragalactic survey of the European Large Area Infrared Space Observatory Survey North 1 field. We have used VLA observat
Externí odkaz:
http://arxiv.org/abs/1103.4228
Before the age of modern photographic and CCD observations alpha Cassiopeiae was labelled as a variable star, though this variability has not been seen with modern instrumentation. We present an analysis of 3 years of high precision space-based photo
Externí odkaz:
http://arxiv.org/abs/0905.4223
Autor:
George, Samuel J., Stevens, Ian R.
We present results of a 150 MHz survey of a field centered on Epsilon Eridani, undertaken with the Giant Metrewave Radio Telescope (GMRT). The survey covers an area with a diameter of 2 deg, has a spatial resolution of 30" and a noise level of 3.1 mJ
Externí odkaz:
http://arxiv.org/abs/0809.4117
Autor:
George, Samuel J., Stevens, Ian R.
We present results from new low frequency observations of two extrasolar planetary systems (Epsilon Eridani and HD128311) taken at 150 MHz with the Giant Metrewave Radio Telescope (GMRT). We do not detect either system, but are able to place tight up
Externí odkaz:
http://arxiv.org/abs/0804.3927