no code implementations • 8 Mar 2021 • A. Ridolfi, T. Gautam, P. C. C. Freire, S. M. Ransom, S. J. Buchner, A. Possenti, V. Venkatraman Krishnan, M. Bailes, M. Kramer, B. W. Stappers, F. Abbate, E. D. Barr, M. Burgay, F. Camilo, A. Corongiu, A. Jameson, P. V. Padmanabh, L. Vleeschower, D. J. Champion, M. Geyer, A. Karastergiou, R. Karuppusamy, A. Parthasarathy, D. J. Reardon, M. Serylak, R. M. Shannon, R. Spiewak
The other three new binary pulsars (NGC 6624G, M62G, and Ter 5 an) are in wider ($> 0. 7$ days) orbits, with companions that are likely to be white dwarfs or neutron stars.
High Energy Astrophysical Phenomena
no code implementations • 9 Dec 2020 • F. Jankowski, M. Berezina, B. W. Stappers, E. D. Barr, M. C. Bezuidenhout, M. Caleb, L. N. Driessen, M. Malenta, V. Morello, K. M. Rajwade, S. Sanidas, M. P. Surnis
Rapid data processing is essential for us to be able to retain high-resolution data of the bursts, to localise them, and to minimise the delay for follow-up observations.
Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena
2 code implementations • 7 Apr 2020 • V. Morello, E. D. Barr, B. W. Stappers, E. F. Keane, A. G. Lyne
Here we derive from first principles that an FFA search closely approaches the theoretical optimum sensitivity to all periodic signals; it is analytically shown to be significantly more sensitive than the standard FFT+IHS method, regardless of pulse period and duty cycle.
Instrumentation and Methods for Astrophysics
1 code implementation • 18 Nov 2019 • L. N. Driessen, I. McDonald, D. A. H. Buckley, M. Caleb, E. J. Kotze, S. B. Potter, K . M. Rajwade, A. Rowlinson, B. W. Stappers, E. Tremou, P. A. Woudt, R. P. Fender, R. Armstrong, P. Groot, I. Heywood, A. Horesh, A. J. van der Horst, E. Koerding, V. A. McBride, J. C. A. Miller-Jones, K. P. Mooley, R. A. M. J. Wijers
Spectroscopic analysis shows that TYC 8332-2529-1 is in a binary, and has a line-of-sight radial velocity amplitude of $43\,\mathrm{km\, s^{-1}}$.
Solar and Stellar Astrophysics High Energy Astrophysical Phenomena
1 code implementation • 9 Oct 2019 • V. Morello, E. F. Keane, T. Enoto, S. Guillot, W. C. G. Ho, A. Jameson, M. Kramer, B. W. Stappers, M. Bailes, E. D. Barr, S. Bhandari, M. Caleb, C. M. L. Flynn, F. Jankowski, S. Johnston, W. van Straten, Z. Arzoumanian, S. Bogdanov, K. C. Gendreau, C. Malacaria, P. S. Ray, R. A. Remillard
We report the discovery of PSR J2251$-$3711, a radio pulsar with a spin period of 12. 1 seconds, the second longest currently known.
High Energy Astrophysical Phenomena
1 code implementation • 12 Nov 2018 • V. Morello, E. D. Barr, S. Cooper, M. Bailes, S. Bates, N. D. R. Bhat, M. Burgay, S. Burke-Spolaor, A. D. Cameron, D. J. Champion, R. P. Eatough, C. M. L. Flynn, A. Jameson, S. Johnston, M. J. Keith, E. F. Keane, M. Kramer, L. Levin, C. Ng, E. Petroff, A. Possenti, B. W. Stappers, W. van Straten, C. Tiburzi
We have also introduced an outlier detection algorithm for efficient radio-frequency interference (RFI) mitigation on folded data, a new approach that enabled the discovery of pulsars previously masked by RFI.
Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena
no code implementations • 9 May 2014 • R. J. Lyon, J. M. Brooke, J. D. Knowles, B. W. Stappers
This is known as the imbalanced learning problem.
no code implementations • 30 Jul 2013 • R. J. Lyon, J. M. Brooke, J. D. Knowles, B. W. Stappers
The domain of radio astronomy is currently facing significant computational challenges, foremost amongst which are those posed by the development of the world's largest radio telescope, the Square Kilometre Array (SKA).
1 code implementation • 30 Jun 2010 • M. J. Keith, A. Jameson, W. van Straten, M. Bailes, S. Johnston, M. Kramer, A. Possenti, S. D. Bates, N. D. R. Bhat, M. Burgay, S. Burke-Spolaor, N. D'Amico, L. Levin, P. L. McMahon, S. Milia, B. W. Stappers
Installation of a digital backend allows us to record 400 MHz of bandwidth for each beam, split into 1024 channels and sampled every 64 us.
High Energy Astrophysical Phenomena Solar and Stellar Astrophysics