MARC表示: Fast radio burst detection in the presence of coloured noise

Fast radio burst detection in the presence of coloured noise

In this paper, we investigate the impact of correlated noise on fast radio burst (FRB) searching. We found that (1) the correlated noise significantly increases the false alarm probability; (2) the signal-to-noise ratios (S/N) of the false positives become higher; (3) the correlated noise also affec...

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主要な著者:	Zhang, C. F., Xu, J. W., Men, Y. P., Deng, X. H., Xu, Heng, Jiang, J. C., Wang, B. J., Lee, K. J., Li, J., Yuan, J. P., Liu, Z. Y., Huang, Y. X., Xu, Y. H., Li, Z. X., Hao, L. F., Luo, J. T., Dai, S., Luo, R., Zakie, Hassan, Ma, Z. Y.
フォーマット:	論文
出版事項:	Oxford University Press 2021
主題:	QB Astronomy
オンライン･アクセス:	http://eprints.um.edu.my/34684/
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id	my.um.eprints.34684
record_format	eprints
spelling	my.um.eprints.346842022-05-26T02:26:28Z http://eprints.um.edu.my/34684/ Fast radio burst detection in the presence of coloured noise Zhang, C. F. Xu, J. W. Men, Y. P. Deng, X. H. Xu, Heng Jiang, J. C. Wang, B. J. Lee, K. J. Li, J. Yuan, J. P. Liu, Z. Y. Huang, Y. X. Xu, Y. H. Li, Z. X. Hao, L. F. Luo, J. T. Dai, S. Luo, R. Zakie, Hassan Ma, Z. Y. QB Astronomy In this paper, we investigate the impact of correlated noise on fast radio burst (FRB) searching. We found that (1) the correlated noise significantly increases the false alarm probability; (2) the signal-to-noise ratios (S/N) of the false positives become higher; (3) the correlated noise also affects the pulse width distribution of false positives, and there will be more false positives with wider pulse width. We use 55-h observation for M82 galaxy carried out at Nanshan 26m radio telescope to demonstrate the application of the correlated noise modelling. The number of candidates and parameter distribution of the false positives can be reproduced with the modelling of correlated noise. We will also discuss a low S/N candidate detected in the observation, for which we demonstrate the method to evaluate the false alarm probability in the presence of correlated noise. Possible origins of the candidate are discussed, where two possible pictures, an M82-harboured giant pulse and a cosmological FRB, are both compatible with the observation. Oxford University Press 2021-06 Article PeerReviewed Zhang, C. F. and Xu, J. W. and Men, Y. P. and Deng, X. H. and Xu, Heng and Jiang, J. C. and Wang, B. J. and Lee, K. J. and Li, J. and Yuan, J. P. and Liu, Z. Y. and Huang, Y. X. and Xu, Y. H. and Li, Z. X. and Hao, L. F. and Luo, J. T. and Dai, S. and Luo, R. and Zakie, Hassan and Ma, Z. Y. (2021) Fast radio burst detection in the presence of coloured noise. Monthly Notices of the Royal Astronomical Society, 503 (4). pp. 5223-5231. ISSN 0035-8711, DOI https://doi.org/10.1093/mnras/stab823 <https://doi.org/10.1093/mnras/stab823>. 10.1093/mnras/stab823
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	QB Astronomy
spellingShingle	QB Astronomy Zhang, C. F. Xu, J. W. Men, Y. P. Deng, X. H. Xu, Heng Jiang, J. C. Wang, B. J. Lee, K. J. Li, J. Yuan, J. P. Liu, Z. Y. Huang, Y. X. Xu, Y. H. Li, Z. X. Hao, L. F. Luo, J. T. Dai, S. Luo, R. Zakie, Hassan Ma, Z. Y. Fast radio burst detection in the presence of coloured noise
description	In this paper, we investigate the impact of correlated noise on fast radio burst (FRB) searching. We found that (1) the correlated noise significantly increases the false alarm probability; (2) the signal-to-noise ratios (S/N) of the false positives become higher; (3) the correlated noise also affects the pulse width distribution of false positives, and there will be more false positives with wider pulse width. We use 55-h observation for M82 galaxy carried out at Nanshan 26m radio telescope to demonstrate the application of the correlated noise modelling. The number of candidates and parameter distribution of the false positives can be reproduced with the modelling of correlated noise. We will also discuss a low S/N candidate detected in the observation, for which we demonstrate the method to evaluate the false alarm probability in the presence of correlated noise. Possible origins of the candidate are discussed, where two possible pictures, an M82-harboured giant pulse and a cosmological FRB, are both compatible with the observation.
format	Article
author	Zhang, C. F. Xu, J. W. Men, Y. P. Deng, X. H. Xu, Heng Jiang, J. C. Wang, B. J. Lee, K. J. Li, J. Yuan, J. P. Liu, Z. Y. Huang, Y. X. Xu, Y. H. Li, Z. X. Hao, L. F. Luo, J. T. Dai, S. Luo, R. Zakie, Hassan Ma, Z. Y.
author_facet	Zhang, C. F. Xu, J. W. Men, Y. P. Deng, X. H. Xu, Heng Jiang, J. C. Wang, B. J. Lee, K. J. Li, J. Yuan, J. P. Liu, Z. Y. Huang, Y. X. Xu, Y. H. Li, Z. X. Hao, L. F. Luo, J. T. Dai, S. Luo, R. Zakie, Hassan Ma, Z. Y.
author_sort	Zhang, C. F.
title	Fast radio burst detection in the presence of coloured noise
title_short	Fast radio burst detection in the presence of coloured noise
title_full	Fast radio burst detection in the presence of coloured noise
title_fullStr	Fast radio burst detection in the presence of coloured noise
title_full_unstemmed	Fast radio burst detection in the presence of coloured noise
title_sort	fast radio burst detection in the presence of coloured noise
publisher	Oxford University Press
publishDate	2021
url	http://eprints.um.edu.my/34684/
_version_	1735409620547010560
score	13.251813

Fast radio burst detection in the presence of coloured noise

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