Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Shankar N"'
Publikováno v:
Discrete Mathematics, Algorithms and Applications. 15
Let [Formula: see text] be a partition of vertex set [Formula: see text] of order [Formula: see text] of a graph [Formula: see text]. The [Formula: see text]-complement of [Formula: see text] denoted by [Formula: see text] is defined as for all [Form
Autor:
J. S. B. Wyithe, Robert F. Goeke, Edward H. Morgan, Mervyn J. Lynch, Steven Tingay, Alan E. E. Rogers, Ravi Subrahmanyan, David Emrich, Brian E. Corey, John D. Bunton, Melanie Johnston-Hollitt, B. B. Kincaid, Judd D. Bowman, Ron Remillard, Miguel F. Morales, A. Roshi, R. Koenig, Christopher L. Williams, Colin J. Lonsdale, Stephen R. McWhirter, Joseph Pathikulangara, David G. Barnes, Randall B. Wayth, David Herne, Daniel A. Mitchell, L. deSouza, Alan R. Whitney, Justin C. Kasper, K. S. Srivani, Rachel L. Webster, Jacqueline N. Hewitt, Mark Waterson, Stephen M. Ord, Roger J. Cappallo, Divya Oberoi, Robert J. Sault, Thiagaraj Prabu, Jamie Stevens, Joseph E. Salah, Andrew Williams, Avinash A. Deshpande, Shankar N. Udaya, Gianni Bernardi, Lincoln J. Greenhill, Eric Kratzenberg, David L. Kaplan, Bryna J. Hazelton, Bryan Gaensler, Adam P. Beardsley, W. Arcus, Frank H. Briggs
Publikováno v:
arXiv
Using the final 128 antenna locations of the Murchison Widefield Array (MWA), we calculate its sensitivity to the epoch of reionization (EoR) power spectrum of redshifted 21 cm emission for a fiducial model and provide the tools to calculate the sens
Autor:
Offringa, A. R., Trott, C. M., Hurley-Walker, N., Johnston-Hollitt, M., McKinley, B., Barry, N., Beardsley, A. P., Bowman, J. D., Briggs, F., Carroll, P., Dillon, J. S., Ewall-Wice, A., Feng, L., Gaensler, B. M., Greenhill, L. J., Hazelton, B. J., Hewitt, J. N., Jacobs, D. C., Kim, H. -S., Kittiwisit, P., Lenc, E., Line, J., Loeb, A., Mitchell, D. A., Morales, M. F., Neben, A. R., Paul, S., Pindor, B., Pober, J. C., Procopio, P., Riding, J., Sethi, S. K., Shankar, N. U., Subrahmanyan, R., Sullivan, I. S., Tegmark, M., Thyagarajan, N., Tingay, S. J., Wayth, R. B., Webster, R. L., Wyithe, J. S. B.
Experiments that pursue detection of signals from the Epoch of Reionization (EoR) are relying on spectral smoothness of source spectra at low frequencies. This article empirically explores the effect of foreground spectra on EoR experiments by measur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd025f892ec93289fd2a5421d6761856
http://arxiv.org/abs/1602.02247
http://arxiv.org/abs/1602.02247
Autor:
Arora, B. S., Morgan, J., Ord, S. M., Tingay, S. J., Hurley-Walker, N., Bell, M., Bernardi, G., Bhat, R., Briggs, F., Callingham, J. R., Deshpande, A. A., Dwarakanath, K. S., Ewall-Wice, A., Feng, L., For, B. -Q., Hancock, P., Hazelton, B. J., Hindson, L., Jacobs, D., Johnston-Hollitt, M., Kapi��ska, A. D., Kudryavtseva, N., Lenc, E., McKinley, B., Mitchell, D., Oberoi, D., Offringa, A. R., Pindor, B., Procopio, P., Riding, J., Staveley-Smith, L., Wayth, R. B., Wu, C., Zheng, Q., Bowman, J. D., Cappallo, R. J., Corey, B. E., Emrich, D., Goeke, R., Greenhill, L. J., Kaplan, D. L., Kasper, J. C., Kratzenberg, E., Lonsdale, C. J., Lynch, M. J., McWhirter, S. R., Morales, M. F., Morgan, E., Prabu, T., Rogers, A. E. E., Roshi, A., Shankar, N. Udaya, Srivani, K. S., Subrahmanyan, R., Waterson, M., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L.
We compare first order (refractive) ionospheric effects seen by the Murchison Widefield Array (MWA) with the ionosphere as inferred from Global Positioning System (GPS) data. The first order ionosphere manifests itself as a bulk position shift of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33f61049080bfe4b3ab78ad38bd74458
http://arxiv.org/abs/1507.01184
http://arxiv.org/abs/1507.01184
Autor:
Loi, Shyeh Tjing, Trott, Cathryn M., Murphy, Tara, Cairns, Iver H., Bell, Martin, Hurley-Walker, Natasha, Morgan, John, Lenc, Emil, Offringa, A. R., Feng, L., Hancock, P. J., Kaplan, D. L., Kudryavtseva, N., BERNARDI, GIANNI, Bowman, J. D., Briggs, F., Cappallo, R. J., Corey, B. E., Deshpande, A. A., Emrich, D., Gaensler, B. M., Goeke, R., Greenhill, L. J., Hazelton, B. J., Johnston-Hollitt, M., Kasper, J. C., Kratzenberg, E., Lonsdale, C. J., Lynch, M. J., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Oberoi, D., Ord, S. M., Prabu, T., Rogers, A. E. E., Roshi, A., Shankar, N. Udaya, Srivani, K. S., Subrahmanyan, R., Tingay, S. J., Waterson, M., Wayth, R. B., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L.
Low-frequency, wide field-of-view (FoV) radio telescopes such as the Murchison Widefield Array (MWA) enable the ionosphere to be sampled at high spatial completeness. We present the results of the first power spectrum analysis of ionospheric fluctuat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ac7a944b9ae120a00fba88880e1b3d8
http://arxiv.org/abs/1506.01798
http://arxiv.org/abs/1506.01798
Autor:
Bradley, R. F., Bernardi, G., Bowman, J. D., Briggs, F., Cappallo, R. J., Deshpande, A. A., Greenhill, L. J., Hazelton, B. J., Johnston-Hollitt, M., Kaplan, D. L., Mitchell, D. A., Morales, M. F., Morgan, E., Oberoi, D., Ord, S. M., Prabu, T., Shankar, N. Udaya, Srivani, K. S., Subrahmanyan, R., Tingay, S. J., Wayth, R. B., Webster, R. L., Williams, A., Neben, Abraham Richard, Hewitt, Jacqueline N, Goeke, Robert F, Lonsdale, Colin John, McWhirter, Stephen R., Williams, Christopher Leigh
Publikováno v:
arXiv
Detection of the fluctuations in a 21 cm line emission from neutral hydrogen during the Epoch of Reionization in thousand hour integrations poses stringent requirements on calibration and image quality, both of which necessitate accurate primary beam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od________88::1dcd3323fa86738f377e2ff0b4f05db8
https://orcid.org/0000-0001-7776-7240
https://orcid.org/0000-0001-7776-7240
Cosmic evolution in the hydrogen content of the Universe through recombination and up to the end of reionization is expected to be revealed as subtle spectral features in the uniform extragalactic cosmic radio background. The redshift evolution in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b11015c2ee42096e9ae982ff2f075e36
http://arxiv.org/abs/1501.04340
http://arxiv.org/abs/1501.04340
Autor:
Neben, A. R., Bradley, R. F., Hewitt, J. N., Bernardi, G., Bowman, J. D., Briggs, F., Cappallo, R. J., Deshpande, A. A., Goeke, R., Greenhill, L. J., Hazelton, B. J., Johnston-Hollitt, M., Kaplan, D. L., Lonsdale, C. J., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Oberoi, D., Ord, S. M., Prabu, T., Shankar, N. Udaya, Srivani, K. S., Subrahmanyan, R., Tingay, S. J., Wayth, R. B., Webster, R. L., Williams, A., Williams, C. L.
Detection of the fluctuations in 21 cm line emission from neutral hydrogen during the Epoch of Reionization in thousand hour integrations poses stringent requirements on calibration and image quality, both of which necessitate accurate primary beam m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bda032f322b0d95a034529aa18dc271
http://hdl.handle.net/20.500.12386/25273
http://hdl.handle.net/20.500.12386/25273
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fec0a75390533abc20dd686c3ae60ac
http://arxiv.org/abs/1305.6047
http://arxiv.org/abs/1305.6047
Autor:
Mitchell, D. A., Greenhill, L. J., Ord, S. M., Bernardi, G., Wayth, R. B., Edgar, R. G., Clark, M. A., Dale, K., Hanspeter Pfister, Gleadow, S. J., Arcus, W., Briggs, F. H., Benkevitch, L., Bowman, J. D., Bunton, J. D., Burns, S., Cappallo, R. J., Corey, B. E., Oliveira-Costa, A., Desouza, L., Doeleman, S. S., Derome, M. F., Emrich, D., Glossop, M., Goeke, R., Krishna, M. R. G., Hazelton, B., Herne, D. E., Hewitt, J. N., Kamini, P. A., Kaplan, D. L., Kasper, J. C., Kincaid, B. B., Kocz, J., Kowald, E., Kratzenberg, E., Kumar, D., Lonsdale, C. J., Lynch, M. J., Madhavi, S., Matejek, M., Mcwhirter, S. R., Morales, M. F., Morgan, E., Oberoi, D., Pathikulangara, J., Prabu, T., Rogers, A., Salah, J. E., Sault, R. J., Shankar, N. U., Srivani, K. S., Stevens, J., Tingay, S. J., Vaccarella, A., Waterson, M., Webster, R. L., Whitney, A. R., Williams, A., Williams, C.
Publikováno v:
Scopus-Elsevier
It is shown that the excellent Murchison Radio-astronomy Observatory site allows the Murchison Widefield Array to employ a simple RFI blanking scheme and still calibrate visibilities and form images in the FM radio band. The techniques described are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::618265b4ba591f8b0be40bb1eacd4052
http://www.scopus.com/inward/record.url?eid=2-s2.0-85055585282&partnerID=MN8TOARS
http://www.scopus.com/inward/record.url?eid=2-s2.0-85055585282&partnerID=MN8TOARS