Skip to main content Accessibility help
×
Home
Hostname: page-component-559fc8cf4f-6f8dk Total loading time: 0.777 Render date: 2021-03-07T03:59:47.392Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

The LOFAR Tied-Array All-Sky Survey for Pulsars and Fast Transients

Published online by Cambridge University Press:  04 June 2018

C. M. Tan
Affiliation:
Jodrell Bank Centre for Astrophysics, University of Manchester Oxford Road, Manchester M13 9PL, UK email: chiamin.tan@postgrad.manchester.ac.uk
Corresponding
Rights & Permissions[Opens in a new window]

Abstract

The LOFAR Tied Array All-Sky Survey (LOTAAS) is an ongoing all northern sky survey for pulsars and transients. It is one of the first large scale pulsar surveys conducted at an observing frequency below 200 MHz. The unique set-up of the survey is the simultaneous formation of 222 beams for each survey pointing by coherently adding signals from the central 6 LOFAR stations. This represents the first SKA-like pulsar survey. As of 12 September 2017, the survey has completed 1456 pointings, more than two-thirds of the total. The survey has discovered 61 new pulsars via Fourier-based periodicity searches and a further 5 via single pulse searches. I present the survey approach and distinctive features including a discussion of an improved machine learning classifier used to identify the best candidates produced by the pipeline for further investigation. I present a summary of the discoveries so far including the first binary pulsar and the pulsar with the longest spin period of 23.5 s.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2018 

References

Bates, S. D., Lorimer, D. R., & Verbiest, J. P. W., 2013, MNRAS, 431, 1352CrossRefGoogle Scholar
Bilous, A., et al., 2015, A&A, 591, A134Google Scholar
Bishop, C. M. 2006, Pattern Recognition and Machine Learning, SpringerGoogle Scholar
Cooper, S. 2017, PhD Thesis, University of ManchesterGoogle Scholar
Hewish, A., Bell, S. J., Pilkington, J. D. H., Scott, P. F., & Collins, R. A., 1968, Nature, 217, 709CrossRefGoogle Scholar
Lorimer, D. R. & Kramer, M. 2005, Handbook of Pulsar Astronomy, Cambridge University PressGoogle Scholar
Lyon, R. J., Stappers, B. W., Cooper, S., Brooke, J. M., & Knowles, J. D. 2016, MNRAS, 459Google Scholar
Maron, O., Kijak, J., Kramer, M., & Wielebinski, R., 2000, A&AS, 147, 195Google Scholar
Quinlan, J. R. 1993, C4.5: programs for machine learning, Morgan KaufmannGoogle Scholar
Ransom, S. M., Eikenberry, S. S., & Middleditch, J. 2002, AJ, 124Google Scholar
Stappers, B. W., et al., 2011, A&A, 530, A80Google Scholar
van Haarlem, M. P., et al., 2013, A&A, 556, A2Google Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 149 *
View data table for this chart

* Views captured on Cambridge Core between 04th June 2018 - 7th March 2021. This data will be updated every 24 hours.

Access

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

The LOFAR Tied-Array All-Sky Survey for Pulsars and Fast Transients
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

The LOFAR Tied-Array All-Sky Survey for Pulsars and Fast Transients
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

The LOFAR Tied-Array All-Sky Survey for Pulsars and Fast Transients
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *