Skip to main content Accessibility help

MWA tied-array processing I: Calibration and beamformation

  • S. M. Ord (a1) (a2), S. E. Tremblay (a2) (a3), S. J. McSweeney (a2) (a3), N. D. R. Bhat (a2) (a3), C. Sobey (a2) (a4), D. A. Mitchell (a1) (a3), P. J. Hancock (a2) (a3) and F. Kirsten (a2) (a5)...


The Murchison Widefield Array is a low-frequency Square Kilometre Array precursor located at the Murchison Radio-astronomy Observatory in Western Australia. Primarily designed as an imaging telescope, but with a flexible signal path, the capabilities of this telescope have recently been extended to include off-line incoherent and tied-array beam formation using recorded antenna voltages. This has provided the capability for high-time and frequency resolution observations, including a pulsar science program. This paper describes the algorithms and pipeline that we have developed to form the tied-array beam products from the summation of calibrated signals of the antenna elements, and presents example polarimetric profiles for PSRs J0437-4715 and J1900-2600 at 185 MHz.


Corresponding author

Author for correspondence: S. M. Ord, E-mail:


Hide All
Anantharamaiah, K. R., Deshpande, A. A., Radhakrishnan, V., Ekers, R. D., Cornwell, T. J., & Goss, W. M. 1991, in ASP Conf. Ser. 19, ‘Source-noise in Radio Synthesis Images’, IAU Colloq. 131: Radio Interferometry. Theory, Techniques, and Applications; Proceedings of the 131st IAU Colloquium, Socorro, NM, Oct. 8-12, 1990 (A92-56376 24-89). San Francisco, CA, Astronomical Society of the Pacific, p. 69.
Bhat, N. D. R., Ord, S. M., Tremblay, S. E., Mc-Sweeney, S. J., & Tingay, S. J. 2016, ApJ, 818, 86. arXiv:1512.08908 [astro-ph.SR]
Bhat, N. D. R., et al. 2014. ApJ, 791, L32. arXiv:1407.4745 [astro-ph.SR]
Bhat, N. D. R., et al. 2018. ApJS, 238, 1, 1
Bhatnagar, S., & Nityananda, R. 2001, A&A, 375, 344. arXiv:astro-ph/0106348
Cordes, J. M., & McLaughlin, M. A. 2003, ApJ, 596, 1142. arXiv:astro-ph/0304364 [astro-ph]
Dai, S., et al. 2015, MNRAS, 449, 3223
Hamaker, J. P. 2000, A&AS, 143, 515
Hamaker, J. P., & Bregman, J. D. 1996, A&AS 117, 161
Hamaker, J. P., Bregman, J. D., & Sault, R. J. 1996, A&AS, 117, 137
Hewish, A., Bell, S. J., Pilkington, J. D. H., Scott, P. F., & Collins, R. A. 1968, Natur, 217, 709
Hotan, A. W., van Straten, W., & Manchester, R. N. 2004, PASAublications of the Astronomical Society of Australia, 21, 302. eprint: astro-ph/0404549
Hurley-Walker, N., et al. 2017, MNRAS, 464, 1146
Johnston, S., Karastergiou, A., Mitra, D., & Gupta, Y. 2008, MNRAS, 388, 261. eprint: oup backfile content _ public journal mnras 388 1 10. 1111_ j. 1365 - 2966. 2008. 13379. x2mnras0388-0261.pdf
Kazemi, S., et al. 2011, MNRAS, 414, 1656
Kudale, S., & Chengalur, J. N. 2017, ExA, 44, 97
Kulkarni, S. R. 1989, ApJ, 98, 1112
Manchester, R. N., et al. 2005, AJ, 129, 1993
McSweeney, S. J., Bhat, N. D. R., Tremblay, S. E., Deshpande, A. A., & Ord, S. M. 2017, ApJ, 836, 224. arXiv:1701.06755 [astro-ph.HE]
Meyers, B. W., et al. 2017, ApJ, 851, 20. arXiv:1709.03651 [astro-ph.HE]
Mitchell, D. A., Greenhill, L. J., Wayth, R. B., Sault, R. J., Lonsdale, C. J., Cappallo, R. J., Morales, M. F., & Ord, S. M. 2008, ISTSP, 2, 707
Navarro, J., Manchester, R. N., Sandhu, J. S., Kulkarni, S. R., & Bailes, M. 1997, ApJ, 486, 1019
Noordam, J. E. 2004, in: Ground-based Telescopes. ed. Oschmann, Jacobus M. Jr. Proceedings of the SPIE, Vol. 5489, SPIE press, Bellingham, Washington USA, pp. 817825
Offringa, A. R., et al. 2014, MNRAS, 444, 606. arXiv:1407.1943
Ord, S. M., et al. 2015, PASA, 32, e006. arXiv:1501.05992 [astro-ph.IM]
Ransom, S. 2011, PRESTO: PulsaR Exploration and Search TOolkit (Astrophysics Source Code Library). ascl: 1107.017
Salvini, S., & Wijnholds, S. J. 2014, A&A, 571, A97. arXiv:1410.2101 [astro-ph.IM]
Sault, R. J., Hamaker, J. P., & Bregman, J. D. 1996, A&AS, 117, 149
Smirnov, O. M. 2011a, A&A, 527, A106
Smirnov, O. M. 2011b, A&A, 527, A107
Smirnov, O. M. 2011c, A&A, 527, A108
Sokolowski, M., et al. 2017, PASA, 34, e062
Tingay, S. J., et al. 2013, PASA, 30, e007. arXiv:1206.6945 [astro-ph.IM]
Tremblay, S. E., et al. 2015, PASA, 32, e005. arXiv:1501.05723 [astro- ph.IM]
van Haarlem, M. P., et al. 2013, A&A, 556, A2
van Straten, W. 2002, ApJ, 568, 436. arXiv:astro-ph/0111426 [astro-ph]
van Straten, W., & Bailes, M., 2011, PASA, 28, 1
Wayth, R. B., et al. 2018, PASA, 35, 33. arXiv:1809.06466 [astro-ph.IM]
Whitney, A., Kettenis, M., Phillips, C., & Sekido, M. 2009, in 8th Int. e-VLBI Workshop, VLBI Data Interchange Format (VDIF) (invited), 42, Proceedings of the 8th International e-VLBI Workshop. 22–26 June 2009. Madrid, Spain Published online at, id.42
Xue, M., et al. 2017, ArXiv e-prints. arXiv:1711.08933 [astro-ph.HE]
Yatawatta, S., et al. 2009, “Radio Interferomietric Calibration Using Te SAGE Algorithm,” 2009 IEEE 13th Digital Signal Processing Workshop and 5th IEEE Signal Processing Education Workshop, Marco Island, FL, 2009, pp. 150155



Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed