Discovery of HI gas in a young radio galaxy at $z = 0.44$ using the Australian Square Kilometre Array Pathfinder

Autor: Allison, J. R., Sadler, E. M., Moss, V. A., Whiting, M. T., Hunstead, R. W., Pracy, M. B., Curran, S. J., Croom, S. M., Glowacki, M., Morganti, R., Shabala, S. S., Zwaan, M. A., Allen, G., Amy, S. W., Axtens, P., Ball, L., Bannister, K. W., Barker, S., Bell, M. E., Bock, D. C. -J., Bolton, R., Bowen, M., Boyle, B., Braun, R., Broadhurst, S., Brodrick, D., Brothers, M., Brown, A., Bunton, J. D., Cantrall, C., Chapman, J., Cheng, W., Chippendale, A. P., Chung, Y., Cooray, F., Cornwell, T., DeBoer, D., Diamond, P., Edwards, P. G., Ekers, R., Feain, I., Ferris, R. H., Forsyth, R., Gough, R., Grancea, A., Gupta, N., Guzman, J. C., Hampson, G., Harvey-Smith, L., Haskins, C., Hay, S., Hayman, D. B., Heywood, I., Hotan, A. W., Hoyle, S., Humphreys, B., Indermuehle, B. T., Jacka, C., Jackson, C., Jackson, S., Jeganathan, K., Johnston, S., Joseph, J., Kendall, R., Kesteven, M., Kiraly, D., Koribalski, B. S., Leach, M., Lenc, E., Lensson, E., Mackay, S., Macleod, A., Marquarding, M., Marvil, J., McClure-Griffiths, N., McConnell, D., Mirtschin, P., Norris, R. P., Neuhold, S., Ng, A., O'Sullivan, J., Pathikulangara, J., Pearce, S., Phillips, C., Popping, A., Qiao, R. Y., Reynolds, J. E., Roberts, P., Sault, R. J., Schinckel, A., Serra, P., Shaw, R., Shields, M., Shimwell, T., Storey, M., Sweetnam, T., Troup, E., Turner, B., Tuthill, J., Tzioumis, A., Voronkov, M. A., Westmeier, T., Wilson, C. D.

We report the discovery of a new 21-cm HI absorption system using commissioning data from the Boolardy Engineering Test Array of the Australian Square Kilometre Array Pathfinder (ASKAP). Using the 711.5 - 1015.5 MHz band of ASKAP we were able to cond

Externí odkaz: http://arxiv.org/abs/1503.01265

The Australian Square Kilometre Array Pathfinder: System Architecture and Specifications of the Boolardy Engineering Test Array

Autor: Hotan, A. W., Bunton, J. D., Harvey-Smith, L., Humphreys, B., Jeffs, B. D., Shimwell, T., Tuthill, J., Voronkov, M., Allen, G., Amy, S., Ardern, K., Axtens, P., Ball, L., Bannister, K., Barker, S., Bateman, T., Beresford, R., Bock, D., Bolton, R., Bowen, M., Boyle, B., Braun, R., Broadhurst, S., Brodrick, D., Brooks, K., Brothers, M., Brown, A., Cantrall, C., Carrad, G., Chapman, J., Cheng, W., Chippendale, A., Chung, Y., Cooray, F., Cornwell, T., Davis, E., de Souza, L., DeBoer, D., Diamond, P., Edwards, P., Ekers, R., Feain, I., Ferris, D., Forsyth, R., Gough, R., Grancea, A., Gupta, N., Guzman, JC., Hampson, G., Haskins, C., Hay, S., Hayman, D., Hoyle, S., Jacka, C., Jackson, C., Jackson, S., Jeganathan, K., Johnston, S., Joseph, J., Kendall, R., Kesteven, M., Kiraly, D., Koribalski, B., Leach, M., Lenc, E., Lensson, E., Li, L., Mackay, S., Macleod, A., Maher, T., Marquarding, M., McClure-Griffiths, N., McConnell, D., Mickle, S., Mirtschin, P., Norris, R., Neuhold, S., Ng, A., O'Sullivan, J., Pathikulangara, J., Pearce, S., Phillips, C., Qiao, RY., Reynolds, J. E., Rispler, A., Roberts, P., Roxby, D., Schinckel, A., Shaw, R., Shields, M., Storey, M., Sweetnam, T., Troup, E., Turner, B., Tzioumis, A., Westmeier, T., Whiting, M., Wilson, C., Wilson, T., Wormnes, K., Wu, X.

This paper describes the system architecture of a newly constructed radio telescope - the Boolardy Engineering Test Array, which is a prototype of the Australian Square Kilometre Array Pathfinder telescope. Phased array feed technology is used to for

Externí odkaz: http://arxiv.org/abs/1409.1325

The giant lobes of Centaurus A observed at 118 MHz with the Murchison Widefield Array

Autor: McKinley, B., Briggs, F., Gaensler, B. M., Feain, I. J., Bernardi, G., Wayth, R. B., Johnston-Hollitt, M., Offringa, A. R., Arcus, W., Barnes, D. G., Bowman, J. D., Bunton, J. D., Cappallo, R. J., Corey, B. E., Deshpande, A., deSouza, L., Emrich, D., Goeke, R., Greenhill, L. J., Hazelton, B. J., Herne, D., Hewitt, J. N., Kaplan, D. L., Kasper, J. C., Kincaid, B. B., Koenig, R., Kratzenberg, E., Lonsdale, C. J., Lynch, M. J., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Oberoi, D., Ord, S. M., Pathikulangara, J., Prabu, T., Remillard, R. A., Rogers, A. E. E., Roshi, A., Salah, J. E., Sault, R. J., Shankar, N. Udaya, Srivani, K. S., Stevens, J., Subrahmanyan, R., Tingay, S. J., Waterson, M., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L., Wyithe, J. S. B.

We present new wide-field observations of Centaurus A (Cen A) and the surrounding region at 118 MHz with the Murchison Widefield Array (MWA) 32-tile prototype, with which we investigate the spectral-index distribution of Cen A's giant radio lobes. We

Externí odkaz: http://arxiv.org/abs/1309.0916

A 189 MHz, 2400 square degree polarization survey with the Murchison Widefield Array 32-element prototype

Autor: Bernardi, G., Greenhill, L. J., Mitchell, D. A., Ord, S. M., Hazelton, B. J., Gaensler, B. M., de Oliveira-Costa, A., Morales, M. F., Shankar, N. Udaya, Subrahmanyan, R., Wayth, R. B., Lenc, E., Williams, C. L., Arcus, W., Arora, S. B., Barnes, D. G., Bowman, J. D., Briggs, F. H., Bunton, J. D., Cappallo, R. J., Corey, B. E., Deshpande, A., deSouza, L., Emrich, D., Goeke, R., Herne, D., Hewitt, J. N., Johnston-Hollitt, M., Kaplan, D., Kasper, J. C., Kincaid, B. B., Koenig, R., Kratzenberg, E., Lonsdale, C. J., Lynch, M. J., McWhirter, S. R., Morgan, E., Oberoi, D., Pathikulangara, J., Prabu, T., Remillard, R. A., Rogers, A. E. E., Roshi, A., Salah, J. E., Sault, R. J., Srivani, K. S., Stevens, J., Tingay, S. J., Waterson, M., Webster, R. L., Whitney, A. R., Williams, A., Wyithe, J. S. B.

We present a Stokes I, Q and U survey at 189 MHz with the Murchison Widefield Array 32-element prototype covering 2400 square degrees. The survey has a 15.6 arcmin angular resolution and achieves a noise level of 15 mJy/beam. We demonstrate a novel i

Externí odkaz: http://arxiv.org/abs/1305.6047

Realisation of a low frequency SKA Precursor: The Murchison Widefield Array

Autor: Tingay, S. J., Goeke, R., Hewitt, J. N., Morgan, E., Remillard, R. A, Williams, C. L., Bowman, J. D., Emrich, D., Ord, S. M., Booler, T., Crosse, B., Pallot, D., Arcus, W., Colegate, T., Hall, P. J., Herne, D., Lynch, M. J., Schlagenhaufer, F., Tremblay, S., Wayth, R. B., Waterson, M., Mitchell, D. A., Sault, R. J., Webster, R. L., Wyithe, J. S. B., Morales, M. F., Hazelton, B. J., Wicenec, A., Williams, A., Barnes, D., Bernardi, G., Greenhill, L. J., Kasper, J. C., Briggs, F., McKinley, B., Bunton, J. D., deSouza, L., Koenig, R., Pathikulangara, J., Stevens, J., Cappallo, R. J., Corey, B. E., Kincaid, B. B., Kratzenberg, E., Lonsdale, C. J., McWhirter, S. R., Rogers, A. E. E., Salah, J. E., Whitney, A. R., Deshpande, A., Prabu, T., Roshi, A., Udaya-Shankar, N., Srivani, K. S., Subrahmanyan, R., Gaensler, B. M., Johnston-Hollitt, M., Kaplan, D. L., Oberoi, D.

The Murchison Widefield Array is a low frequency (80 - 300 MHz) SKA Precursor, comprising 128 aperture array elements distributed over an area of 3 km diameter. The MWA is located at the extraordinarily radio quiet Murchison Radioastronomy Observator

Externí odkaz: http://arxiv.org/abs/1212.1327