scholarly journals Finding Pulsars at Parkes

2001 ◽  
Vol 18 (1) ◽  
pp. 1-11 ◽  
Author(s):  
R. N. Manchester
Keyword(s):  
Radio Telescope ◽  
Globular Clusters ◽  
Millisecond Pulsars ◽  
Statistical Estimates ◽  
Detection Algorithms ◽  
The World ◽  
Detection Instrument ◽  
Pulsar Searches ◽  
Galactic Distribution ◽  
Unique Individual

AbstractThere are many reasons why it is important to increase the number of known pulsars. Not only do pulsar searches continue to improve statistical estimates of, for example, pulsar birthrates, lifetimes and the Galactic distribution, but they continue to turn up interesting and, in some cases, unique individual pulsars. In the early days of pulsar astronomy, the Molonglo radio telescope led the world as a pulsar detection instrument. However, the Parkes radio telescope, with its frequency versatility and greater tracking ablility, combined with sensitive receivers and powerful computer detection algorithms, is now the world’s most successful telescope at finding pulsars. The Parkes multibeam survey, begun in 1997, by itself will come close to doubling the number of known pulsars. Parkes has also been very successful at finding millisecond pulsars (MSPs), especially in globular clusters. One third of the known MSPs have been found in just one cluster, 47 Tucanae.

scholarly journals Pulsar Searches at Effelsberg

2004 ◽  
Vol 218 ◽  
pp. 133-134 ◽  
Author(s):  
B. Klein ◽  
M. Kramer ◽  
P. Müller ◽  
R. Wielebinski
Keyword(s):  
Radio Telescope ◽  
Galactic Center ◽  
Millisecond Pulsars ◽  
Highly Dispersed ◽  
L Band ◽  
Under Construction ◽  
5 Ghz ◽  
Key Aspects ◽  
Pulsar Searches

We report on the progress of our search for highly dispersed pulsars near the Galactic Center at 5 GHz using the 100-m radio telescope in Effelsberg. We also present key aspects of our new survey for millisecond pulsars at 21 cm in parts of the northern sky. This survey will greatly benefit from the L-band multibeam receiver and a new FFT-based backend which are currently under construction at the MPIfR.

scholarly journals Pulsar Searches at Effelsberg — Past, Present & Future

2000 ◽  
Vol 177 ◽  
pp. 11-16
Author(s):  
D.R. Lorimer ◽  
M. Kramer
Keyword(s):  
Radio Telescope ◽  
Galactic Plane ◽  
Progress Report ◽  
Galactic Centre ◽  
Bright Future ◽  
The World ◽  
Highly Dispersed ◽  
Pulsar Searches

AbstractIt is fair to say that pulsar searches with the 100-m Effelsberg telescope have had something of a checkered history — after all, for many years, this was the largest radio telescope in the world never to have found a pulsar! This situation has, happily, changed. In this review we summarize recent discoveries of weak pulsars along the Galactic plane, give a progress report on a survey for highly dispersed pulsars in the Galactic centre and, in the spirit of this meeting, speculate on what should be a bright future for pulsar searches with this instrument.

scholarly journals Pulsars in Globular Clusters

2007 ◽  
Vol 3 (S246) ◽  
pp. 291-300 ◽  
Author(s):  
Scott M. Ransom
Keyword(s):  
Equation Of State ◽  
Neutron Stars ◽  
Globular Clusters ◽  
Main Sequence ◽  
Galactic Disk ◽  
Nuclear Density ◽  
Millisecond Pulsars ◽  
Eccentric Orbits ◽  
The Masses ◽  
Current Record

AbstractGlobular clusters produce orders of magnitude more millisecond pulsars per unit mass than the Galactic disk. Since the first cluster pulsar was uncovered 20 years ago, at least 138 have been identified – most of which are binary millisecond pulsars. Because their origins involve stellar encounters, many of the systems are exotic objects that would never be observed in the Galactic disk. Examples include pulsar-main sequence binaries, extremely rapid rotators (including the current record holder), and millisecond pulsars in highly eccentric orbits. These systems are allowing new probes of the interstellar medium, the equation of state of material at supra-nuclear density, the masses of neutron stars, and globular cluster dynamics.

scholarly journals Searching for pulsars in future radio continuum surveys

2017 ◽  
Vol 13 (S337) ◽  
pp. 328-329
Author(s):  
Shi Dai ◽  
Simon Johnston ◽  
George Hobbs
Keyword(s):  
Black Hole ◽  
Radio Continuum ◽  
Galactic Centre ◽  
Dispersion Measure ◽  
Millisecond Pulsars ◽  
Square Kilometre Array ◽  
Orbital Modulation ◽  
Pulsar Searches

AbstractRadio continuum surveys are equally sensitive to all pulsars, not affected by dispersion measure smearing, scattering or orbital modulation of spin periods, and therefore allow us to search for extreme pulsars, such as sub-millisecond pulsars, pulsar-black hole systems and pulsars in the Galactic Centre. As we move towards the Square Kilometre Array (SKA) era, searching for pulsars in continuum images will complement conventional pulsar searches, and make it possible to find extreme objects.

scholarly journals Exceedance frequency of appearance of the extreme internal waves in the World Ocean

2018 ◽  
Vol 25 (3) ◽  
pp. 511-519 ◽  
Author(s):  
Tatyana Talipova ◽  
Efim Pelinovsky ◽  
Oxana Kurkina ◽  
Ayrat Giniyatullin ◽  
Andrey Kurkin
Keyword(s):  
Internal Waves ◽  
Yellow Sea ◽  
World Ocean ◽  
The Yellow Sea ◽  
Exceedance Probability ◽  
Extreme Statistics ◽  
Statistical Estimates ◽  
Northwestern Shelf ◽  
The World ◽  
Egyptian Coast

Abstract. Statistical estimates of internal waves in different regions of the World Ocean are discussed. It is found that the observed exceedance probability of large-amplitude internal waves in most cases can be described by the Poisson law, which is one of the typical laws of extreme statistics. Detailed analysis of the statistical properties of internal waves in several regions of the World Ocean has been performed: tropical part of the Atlantic Ocean, northwestern shelf of Australia, the Mediterranean Sea near the Egyptian coast, and the Yellow Sea.

scholarly journals DISCOVERY OF TWO MILLISECOND PULSARS INFERMISOURCES WITH THE NANÇAY RADIO TELESCOPE

2011 ◽  
Vol 732 (1) ◽  
pp. 47 ◽  
Author(s):  
I. Cognard ◽  
L. Guillemot ◽  
T. J. Johnson ◽  
D. A. Smith ◽  
C. Venter ◽  
...  
Keyword(s):  
Radio Telescope ◽  
Millisecond Pulsars

John of Salisbury as historian

1994 ◽  
Vol 3 ◽  
pp. 169-177
Author(s):  
Marjorie Chibnall
Keyword(s):  
Old Testament ◽  
John Of Salisbury ◽  
Individual Approach ◽  
The World ◽  
Hugh Of Saint Victor ◽  
Unique Individual

Among the works of John of Salisbury the short, unfinished treatise that we call the Historia Pontificalis represents his only incursion into the writing of conventional history.’ Indeed even this, like the Metalogicon, Policraticus and Entheticus, bears the stamp of his unique individual approach to any branch of thought; and to call it conventional is little more than a polite bow of acknowledgement to the graceful preface in which he passes it off as merely another continuation of the world chronicle stretching from the Old Testament through Eusebius and Jerome to Sigebert of Gembloux and Hugh of Saint-Victor in his own age.

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