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Gridded and direct Epoch of Reionisation bispectrum estimates using the Murchison Widefield Array

  • Cathryn M. Trott (a1) (a2), Catherine A. Watkinson (a3), Christopher H. Jordan (a1) (a2), Shintaro Yoshiura (a4), Suman Majumdar (a3) (a5), N. Barry (a2) (a6), R. Byrne (a7), B. J. Hazelton (a7) (a8), K. Hasegawa (a4), R. Joseph (a1) (a2), T. Kaneuji (a4), K. Kubota (a4), W. Li (a9), J. Line (a1) (a2), C. Lynch (a1) (a2), B. McKinley (a1) (a2), D. A. Mitchell (a10), M. F. Morales (a2) (a7), S. Murray (a1) (a2) (a11), B. Pindor (a2) (a6), J. C. Pober (a9), M. Rahimi (a6), J. Riding (a6), K. Takahashi (a4), S. J. Tingay (a1), R. B. Wayth (a1) (a2), R. L. Webster (a2) (a6), M. Wilensky (a7), J. S. B. Wyithe (a2) (a6), Q. Zheng (a12), David Emrich (a1), A. P. Beardsley (a11), T. Booler (a1), B. Crosse (a1), T. M. O. Franzen (a10), L. Horsley (a1), M. Johnston-Hollitt (a1), D. L. Kaplan (a13), D. Kenney (a1), D. Pallot (a14), G. Sleap (a1), K. Steele (a1), M. Walker (a1), A. Williams (a1) and C. Wu (a14)...

Abstract

We apply two methods to estimate the 21-cm bispectrum from data taken within the Epoch of Reionisation (EoR) project of the Murchison Widefield Array (MWA). Using data acquired with the Phase II compact array allows a direct bispectrum estimate to be undertaken on the multiple redundantly spaced triangles of antenna tiles, as well as an estimate based on data gridded to the uv-plane. The direct and gridded bispectrum estimators are applied to 21 h of high-band (167–197 MHz; z = 6.2–7.5) data from the 2016 and 2017 observing seasons. Analytic predictions for the bispectrum bias and variance for point-source foregrounds are derived. We compare the output of these approaches, the foreground contribution to the signal, and future prospects for measuring the bispectra with redundant and non-redundant arrays. We find that some triangle configurations yield bispectrum estimates that are consistent with the expected noise level after 10 h, while equilateral configurations are strongly foreground-dominated. Careful choice of triangle configurations may be made to reduce foreground bias that hinders power spectrum estimators, and the 21-cm bispectrum may be accessible in less time than the 21-cm power spectrum for some wave modes, with detections in hundreds of hours.

Copyright

Corresponding author

Author for correspondence: Cathryn M. Trott, E-mail: cathryn.trott@curtin.edu.au

References

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Ali, Z. S., et al. 2015, ApJ, 809, 61
Barry, N., Hazelton, B., Sullivan, I., Morales, M. F., & Pober, J. C. 2016, preprint, arXiv:1603.00607
Beane, A., & Lidz, A. 2018, preprint, arXiv:1806.02796
Beardsley, A. P., et al. 2016, preprint, arXiv:1608.06281
Bharadwaj, S., & Pandey, S. K. 2005, MNRAS, 358, 968
Bowman, J. D., Cairns, I., Kaplan, D. L., Murphy, T., Oberoi, D., et al. 2013, PASA, 30, 31
Brillinger, D., & Rosenblatt, M. 1967, in Spectr. Anal. time Ser., ed. Bernard, Harris (New York: Wiley), 189
Cheng, C., et al. 2018, preprint, arXiv:1810.05175
Datta, A., Bowman, J. D., & Carilli, C. L. 2010, ApJ, 724, 526
DeBoer, D. R., et al. 2016, preprint, arXiv:1606.07473
Eggemeier, A., & Smith, R. E. 2017, MNRAS, 466, 2496
Ellingson, S. W., Clarke, T. E., Cohen, A., Craig, J., Kassim, N. E., Pihlstrom, Y., Rickard, L. J., & Taylor, G. B. 2009, Proc. IEEE, 97, 1421
Franzen, T. M. O., et al. 2016, MNRAS, 459, 3314
Furlanetto, S. R., Oh, S. P., & Briggs, F. H. 2006, PhR, 433, 181
Greig, B., & Mesinger, A. 2017, MNRAS, 472, 2651
Intema, H. T., van Weeren, R. J., Röttgering, H. J. A., & Lal, D. V. 2011, A&A, 535, A38
Jacobs, D. C., et al. 2016, ApJ, 825, 114
Joseph, R. C., Trott, C. M., & Wayth, R. B. 2018, ApJ, 156, 285
Jung, G., Racine, B., & van Tent, B. 2018, Journal of Cosmology and Astroparticle Physics, 11, 047
Koopmans, L., et al. 2015, Advancing astrophysics with the square kilometre array (AASKA14), p. 1
Lewis, A. 2011, Journal of Cosmology and Astroparticle Physics, 10, 026
Li, W., et al. 2018, ApJ, 863, 170
Majumdar, S., Pritchard, J. R., Mondal, R., Watkinson, C. A., Bharadwaj, S., & Mellema, G. 2018, MNRAS, 476, 4007
Mesinger, A., Furlanetto, S., & Cen, R. 2011, MNRAS, 411, 955
Morales, M. F., Hazelton, B., Sullivan, I., & Beardsley, A. 2012, ApJ, 752, 137
Murray, S. G., Trott, C. M., & Jordan, C. H. 2017, ApJ, 845, 7
Parsons, A. R., et al. 2010, AJ, 139, 1468
Parsons, A., Pober, J., McQuinn, M., Jacobs, D., & Aguirre, J. 2012, ApJ, 753, 81
Patil, A. H., et al., 2014, MNRAS, 443, 1113
Patil, A. H., et al. 2016, MNRAS, 436, 4317
Pritchard, J. R., & Loeb, A. 2008, PhRvD, 78, 103511
Shimabukuro, H., Yoshiura, S., Takahashi, K., Yokoyama, S., & Ichiki, K. 2017, MNRAS, 468, 1542
Thyagarajan, N., et al. 2015, ApJ, 804, 14
Tingay, S. J., et al. 2013, PASA, 30, 7
Trott, C. M., & Wayth, R. B. 2016, PASA, 33, e019
Trott, C. M., Wayth, R. B., & Tingay, S. J. 2012, ApJ, 757, 101
Trott, C. M., et al. 2016, ApJ, 818, 139
Vedantham, H., Udaya Shankar, N., & Subrahmanyan, R. 2012, ApJ, 745, 176
Watkinson, C. A., & Pritchard, J. R. 2014, MNRAS, 443, 3090
Watkinson, C. A., & Trott, C. M. 2019, PASA, in prep.
Watkinson, C. A., Giri, S. K., Ross, H. E., Dixon, K. L., Iliev, I. T., Mellama, G., & Pritchard, J. R. 2018, preprint, arXiv:1808.02372
Wayth, R. B., et al. 2018, preprint, arXiv:1809.06466
Wyithe, J. S. B., & Morales, M. F. 2007, MNRAS, 379, 1647
Yoshiura, S., Shimabukuro, H., Takahashi, K., Momose, R., Nakanishi, H., & Imai, H. 2015, MNRAS, 451, 266
van Haarlem, M. P., et al., 2013, A&A, 556, A2

Keywords

Gridded and direct Epoch of Reionisation bispectrum estimates using the Murchison Widefield Array

  • Cathryn M. Trott (a1) (a2), Catherine A. Watkinson (a3), Christopher H. Jordan (a1) (a2), Shintaro Yoshiura (a4), Suman Majumdar (a3) (a5), N. Barry (a2) (a6), R. Byrne (a7), B. J. Hazelton (a7) (a8), K. Hasegawa (a4), R. Joseph (a1) (a2), T. Kaneuji (a4), K. Kubota (a4), W. Li (a9), J. Line (a1) (a2), C. Lynch (a1) (a2), B. McKinley (a1) (a2), D. A. Mitchell (a10), M. F. Morales (a2) (a7), S. Murray (a1) (a2) (a11), B. Pindor (a2) (a6), J. C. Pober (a9), M. Rahimi (a6), J. Riding (a6), K. Takahashi (a4), S. J. Tingay (a1), R. B. Wayth (a1) (a2), R. L. Webster (a2) (a6), M. Wilensky (a7), J. S. B. Wyithe (a2) (a6), Q. Zheng (a12), David Emrich (a1), A. P. Beardsley (a11), T. Booler (a1), B. Crosse (a1), T. M. O. Franzen (a10), L. Horsley (a1), M. Johnston-Hollitt (a1), D. L. Kaplan (a13), D. Kenney (a1), D. Pallot (a14), G. Sleap (a1), K. Steele (a1), M. Walker (a1), A. Williams (a1) and C. Wu (a14)...

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