scholarly journals Verifying the low frequency pulsar polarimetry of the MWA

2017 ◽  
Vol 13 (S337) ◽  
pp. 416-417
Author(s):  
Steven E. Tremblay ◽  
Mengyao Xue ◽  
N. D. Ramesh Bhat ◽  
Caterina Tiburzi
Keyword(s):  
Time Resolution ◽  
Low Frequency ◽  
High Time ◽  
High Time Resolution ◽  
Geometric Information ◽  
Pulsar Emission ◽  
Rich History ◽  
Linear Polarisation ◽  
Resolution Data

AbstractStudying the polarised properties of pulsars has a rich history giving unique geometric information about pulsars as well as testing the theories of pulsar emission physics. Performing such studies with the MWA has the attraction that the percentage of linear polarisation of many pulsars increases as the observing frequency decreases. Here we discuss the strategies being employed to verify the polarimetric response of the MWA’s high time resolution data.

High Time Resolution Infrared Observations of the Crab Nebula Pulsar and the Pulsar Emission Mechanism

1997 ◽  
Vol 477 (1) ◽  
pp. 465-474 ◽  
Author(s):  
S. S. Eikenberry ◽  
G. G. Fazio ◽  
S. M. Ransom ◽  
J. Middleditch ◽  
J. Kristian ◽  
...  
Keyword(s):  
Time Resolution ◽  
Crab Nebula ◽  
High Time ◽  
High Time Resolution ◽  
Emission Mechanism ◽  
Pulsar Emission ◽  
Infrared Observations ◽  
The Crab Nebula

scholarly journals A New Technique for Precise Stellar Photometry: Application to Small-Scale Activity of EV Lacertae

1995 ◽  
Vol 151 ◽  
pp. 133-134 ◽  
Author(s):  
B.E. Zhilyaev
Keyword(s):  
Time Resolution ◽  
High Time ◽  
Small Scale ◽  
High Time Resolution ◽  
Stellar Photometry ◽  
A New Technique ◽  
Ev Lac ◽  
Counting Statistics ◽  
Simple Integration ◽  
Resolution Data

AbstractA new prefiltering technique (PFT) for precise stellar photometry is described. It has been proved that the prefiltered and added high-time resolution data provide an increase in S/N ratio by factors 1.3 — 1.7 in comparison with simple integration. The PFT allows to detect event amplitudes which are comparable to that caused by counting statistics. Adopting the PFT, our observations reveal small-scale flare events in the subsecond range in EV Lac.

scholarly journals Crab Pulsar: Enhanced Optical Emission During Giant Radio Pulses

2011 ◽  
Vol 7 (S285) ◽  
pp. 296-298
Author(s):  
Susan Collins ◽  
Andy Shearer ◽  
Ben Stappers ◽  
Cesare Barbieri ◽  
Giampiero Naletto ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Time Resolution ◽  
Optical Emission ◽  
High Time ◽  
High Time Resolution ◽  
Crab Pulsar ◽  
Comprehensive Model ◽  
Optical Pulses ◽  
Pulsar Emission ◽  
Optical Wavelengths

AbstractAlthough optical pulsar studies have been limited to a few favoured objects, the observation of pulsars at optical wavelengths provides an opportunity to derive a number of important pulsar characteristics, including the energy spectrum of the emitting electrons and the geometry of the emission zone. These parameters will be vital for a comprehensive model of pulsar emission mechanisms. Observations of the Crab pulsar with the high-time-resolution photon-tagging photometer IquEYE show an optical–radio delay of ~178 μs. Incorporating simultaneous Jodrell Bank radio observations suggested a correlation between giant radio pulses and enhanced optical pulses for this pulsar, thus offering possible evidence for the reprocessing of radio photons.

scholarly journals Survey of Ionospheric Pc3-5 ULF Wave Signatures in SuperDARN High Time Resolution Data

2018 ◽  
Vol 123 (5) ◽  
pp. 4215-4231 ◽  
Author(s):  
X. Shi ◽  
J. M. Ruohoniemi ◽  
J. B. H. Baker ◽  
D. Lin ◽  
E. C. Bland ◽  
...  
Keyword(s):  
Time Resolution ◽  
High Time ◽  
High Time Resolution ◽  
Ulf Wave ◽  
Resolution Data

Vys: A Protocol for Commensal Fast Transient Searches and Data Processing at the Very Large Array

2018 ◽  
Vol 07 (02n03) ◽  
pp. 1850005 ◽  
Author(s):  
Martin Pokorny ◽  
Casey J. Law ◽  
Geoffrey C. Bower ◽  
Sarah Burke-Spolaor ◽  
Bryan J. Butler ◽  
...  
Keyword(s):  
Time Resolution ◽  
Data Stream ◽  
Detection System ◽  
High Time ◽  
High Time Resolution ◽  
Large Array ◽  
Very Large Array ◽  
Real Time Analysis ◽  
Fast Transient ◽  
Resolution Data

We describe a new protocol deployed at the National Radio Astronomy Observatory’s Karl G. Jansky Very Large Array (VLA) to support the distribution of data in support of commensal data analysis. The protocol, vys, is designed to provide access to a high time resolution data stream while a primary observation continues with the typical (lower) time resolution data stream. This form of dual time resolution, commensal observing has been implemented to enable the search for millisecond astrophysical transient events by a new, dedicated compute cluster located at the VLA. The fast transient detection system, realfast, performs real-time analysis in situ to detect events of interest and record relatively short duration data “cut-outs” of those events. By selectively recording high time resolution data, provided by vys at rates of up to 1.4[Formula: see text]GB[Formula: see text]s[Formula: see text], realfast will reduce the recorded data volume by an estimated factor of up to 1000. This makes it possible to search for transients commensally in a high data rate stream over the thousands of hours needed to find the rarest events.

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