Zobrazeno 1 - 10
of 634
pro vyhledávání: '"Tegmark M"'
Autor:
Trott, Cathryn M., Jordan, C. H., Murray, S. G., Pindor, B., Mitchell, D. A., Wayth, R. B., Line, J., McKinley, B., Beardsley, A., Bowman, J., Briggs, F., Hazelton, B. J., Hewitt, J., Jacobs, D., Morales, M. F., Pober, J. C., Sethi, S., Shankar, U., Subrahmanyan, R., Tegmark, M., Tingay, S. J., Webster, R. L., Wyithe, J. S. B.
Structure imprinted in foreground extragalactic point sources by ionospheric refraction has the potential to contaminate Epoch of Reionisation (EoR) power spectra of the 21~cm emission line of neutral hydrogen. The alteration of the spatial and spect
Externí odkaz:
http://arxiv.org/abs/1809.06851
Autor:
Li, W., Pober, J. C., Hazelton, B. J., Barry, N., Morales, M. F., Sullivan, I., Parsons, A. R., Ali, Z. S., Dillon, J. S., Beardsley, A. P., Bowman, J. D., Briggs, F., Byrne, R., Carroll, P., Crosse, B., Emrich, D., Ewall-Wice, A., Feng, L., Franzen, T. M. O., Hewitt, J. N., Horsley, L., Jacobs, D. C., Johnston-Hollitt, M., Jordan, C., Joseph, R. C., Kaplan, D. L., Kenney, D., Kim, H., Kittiwisit, P., Lanman, A., Line, J., McKinley, B., Mitchell, D. A., Murray, S., Neben, A., Offringa, A. R., Pallot, D., Paul, S., Pindor, B., Procopio, P., Rahimi, M., Riding, J., Sethi, S. K., Shankar, N. Udaya, Steele, K., Subrahmanian, R., Tegmark, M., Thyagarajan, N., Tingay, S. J., Trott, C., Walker, M., Wayth, R. B., Webster, R. L., Williams, A., Wu, C., Wyithe, S.
Interferometric arrays seeking to measure the 21 cm signal from the Epoch of Reionization must contend with overwhelmingly bright emission from foreground sources. Accurate recovery of the 21 cm signal will require precise calibration of the array, a
Externí odkaz:
http://arxiv.org/abs/1807.05312
Autor:
Kapinska, A. D., Staveley-Smith, L., Crocker, R., Meurer, G. R., Bhandari, S., Hurley-Walker, N., Offringa, A. R., Hanish, D. J., Seymour, N., Ekers, R. D., Bell, M. E., Callingham, J. R., Dwarakanath, K. S., For, B. -Q., Gaensler, B. M., Hancock, P. J., Hindson, L., Johnston-Hollitt, M., Lenc, E., McKinley, B., Morgan, J., Procopio, P., Wayth, R. B., Wu, C., Zheng, Q., Barry, N., Beardsley, A. P., Bowman, J. D., Briggs, F., Carroll, P., Dillon, J. S., Ewall-Wice, A., Feng, L., Greenhill, L. J., Hazelton, B. J., Hewitt, J. N., Jacobs, D. J., Kim, H. -S., Kittiwisit, P., Line, J., Loeb, A., Mitchell, D. A., Morales, M. F., Neben, A. R., Paul, S., Pindor, B., Pober, J. C., Riding, J., Sethi, S. K., Shankar, N. Udaya, Subrahmanyan, R., Sullivan, I. S., Tegmark, M., Thyagarajan, N., Tingay, S. J., Trott, C. M., Webster, R. L., Wyithe, S. B., Cappallo, R. J., Deshpande, A. A., Kaplan, D. L., Lonsdale, C. J., McWhirter, S. R., Morgan, E., Oberoi, D., Ord, S. M., Prabu, T., Srivani, K. S., Williams, A., Williams, C. L.
We present new radio continuum observations of NGC253 from the Murchison Widefield Array at frequencies between 76 and 227 MHz. We model the broadband radio spectral energy distribution for the total flux density of NGC253 between 76 MHz and 11 GHz.
Externí odkaz:
http://arxiv.org/abs/1702.02434
Autor:
Paul, Sourabh, Sethi, Shiv K., Morales, Miguel F., Dwarkanath, K. S., Shankar, N. Udaya, Subrahmanyan, Ravi, Barry, N., Beardsley, A. P., Bowman, Judd D., Briggs, F., Carroll, P., de Oliveira-Costa, A., Dillon, Joshua S., Ewall-Wice, A., Feng, L., Greenhill, L. J., Gaensler, B. M., Hazelton, B. J., Hewitt, J. N., Hurley-Walker, N., Jacobs, D. J., Kim, Han-Seek, Kittiwisit, P., Lenc, E., Line, J., Loeb, A., McKinley, B., Mitchell, D. A., Neben, A. R., Offringa, A. R., Pindor, B., Pober, J. C., Procopio, P., Riding, J., Sullivan, I. S., Tegmark, M., Thyagarajan, Nithyanandan, Tingay, S. J., Trott, C. M., Wayth, R. B., Webster, R. L., Wyithe, J. S. B., Cappallo, Roger, Johnston-Hollitt, M., Kaplan, D. L., Lonsdale, C. J., McWhirter, S. R., Morgan, E., Oberoi, D., Ord, S. M., Prabu, T., Srivani, K. S., Williams, A., Williams, C. L.
Publikováno v:
ApJ, 2016, 833, 2, 213
The Detection of redshifted 21 cm emission from the epoch of reionization (EoR) is a challenging task owing to strong foregrounds that dominate the signal. In this paper, we propose a general method, based on the delay spectrum approach, to extract H
Externí odkaz:
http://arxiv.org/abs/1610.07003
Autor:
Beardsley, A. P., Hazelton, B. J., Sullivan, I. S., Carroll, P., Barry, N., Rahimi, M., Pindor, B., Trott, C. M., Line, J., Jacobs, Daniel C., Morales, M. F., Pober, J. C., Bernardi, G., Bowman, Judd D., Busch, M. P., Briggs, F., Cappallo, R. J., Corey, B. E., de Oliveira-Costa, A., Dillon, Joshua S., Emrich, D., Ewall-Wice, A., Feng, L., Gaensler, B. M., Goeke, R., Greenhill, L. J., Hewitt, J. N., Hurley-Walker, N., Johnston-Hollitt, M., Kaplan, D. L., Kasper, J. C., Kim, H. S., Kratzenberg, E., Lenc, E., Loeb, A., Lonsdale, C. J., Lynch, M. J., McKinley, B., McWhirter, S. R., Mitchell, D. A., Morgan, E., Neben, A. R., Thyagarajan, Nithyanandan, Oberoi, D., Offringa, A. R., Ord, S. M., Paul, S., Prabu, T., Procopio, P., Riding, J., Rogers, A. E. E., Roshi, A., Shankar, N. Udaya, Sethi, Shiv K., Srivani, K. S., Subrahmanyan, R., Tegmark, M., Tingay, S. J., Waterson, M., Wayth, R. B., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L., Wu, C., Wyithe, J. S. B.
The Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data and now faces the challenge of overcoming foreground and systematic contamination to reduce the data to a cosmological measurement. We introduce s
Externí odkaz:
http://arxiv.org/abs/1608.06281
Autor:
Lenc, Emil, Gaensler, B. M., Sun, X. H., Sadler, E. M., Willis, A. G., Barry, N., Beardsley, A. P., Bell, M. E., Bernardi, G., Bowman, J. D., Briggs, F., Callingham, J. R., Cappallo, R. J., Carroll, P., Corey, B. E., de Oliveira-Costa, A., Deshpande, A. A., Dillon, J. S., Dwarkanath, K. S., Emrich, D., Ewall-Wice, A., Feng, L., For, B. -Q., Goeke, R., Greenhill, L. J., Hancock, P., Hazelton, B. J., Hewitt, J. N., Hindson, L., Hurley-Walker, N., Johnston-Hollitt, M., Jacobs, D. C., Kapinska, A. D., Kaplan, D. L., Kasper, J. C., Kim, H. -S., Kratzenberg, E., Line, J., Loeb, A., Lonsdale, C. J., Lynch, M. J., McKinley, B., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Morgan, J., Murphy, T., Neben, A. R., Oberoi, D., Offringa, A. R., Ord, S. M., Paul, S., Pindor, B., Pober, J. C., Prabu, T., Procopio, P., Riding, J., Rogers, A. E. E., Roshi, A., Shankar, N. Udaya, Sethi, S. K., Srivani, K. S., Staveley-Smith, L., Subrahmanyan, R., Sullivan, I. S., Tegmark, M., Thyagarajan, Nithyanandan, Tingay, S. J., Trott, C., Waterson, M., Wayth, R. B., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L., Wu, C., Wyithe, J. S. B., Zheng, Q.
We present deep polarimetric observations at 154 MHz with the Murchison Widefield Array (MWA), covering 625 deg^2 centered on RA=0 h, Dec=-27 deg. The sensitivity available in our deep observations allows an in-band, frequency-dependent analysis of p
Externí odkaz:
http://arxiv.org/abs/1607.05779
A High Reliability Survey of Discrete Epoch of Reionization Foreground Sources in the MWA EoR0 Field
Autor:
Carroll, P. A., Line, J., Morales, M. F., Barry, N., Beardsley, A. P., Hazelton, B. J., Jacobs, D. C., Pober, J. C., Sullivan, I. S., Webster, R. L., Bernardi, G., Bowman, J. D., Briggs, F., Cappallo, R. J., Corey, B. E., de Oliveira-Costa, A., Dillon, J. S., Emrich, D., Ewall-Wice, A., Feng, L., Gaensler, B. M., Goeke, R., Greenhill, L. J., Hewitt, J. N., Hurley-Walker, N., Johnston-Hollitt, M., Kaplan, D. L., Kasper, J. C., Kim, HS., Kratzenberg, E., Lenc, E., Loeb, A., Lonsdale, C. J., Lynch, M. J., McKinley, B., McWhirter, S. R., Mitchell, D. A., Morgan, E., Neben, A. R., Oberoi, D., Offringa, A. R., Ord, S. M., Paul, S., Pindor, B., Prabu, T., Procopio, P., Riding, J., Rogers, A. E. E., Roshi, A., Shankar, N. Udaya, Sethi, S. K., Srivani, K. S., Subrahmanyan, R., Tegmark, M., Thyagarajan, Nithyanandan, Tingay, S. J., Trott, C. M., Waterson, M., Wayth, R. B., Whitney, A. R., Williams, A., Williams, C. L., Wu, C., Wyithe, J. S. B.
Detection of the Epoch of Reionization HI signal requires a precise understanding of the intervening galaxies and AGN, both for instrumental calibration and foreground removal. We present a catalogue of 7394 extragalactic sources at 182 MHz detected
Externí odkaz:
http://arxiv.org/abs/1607.03861
Autor:
Jacobs, Daniel C., Hazelton, B. J., Trott, C. M., Dillon, Joshua S., Pindor, B., Sullivan, I. S., Pober, J. C., Barry, N., Beardsley, A. P., Bernardi, G., Bowman, Judd D., Briggs, F., Cappallo, R. J., Carroll, P., Corey, B. E., de Oliveira-Costa, A., Emrich, D., Ewall-Wice, A., Feng, L., Gaensler, B. M., Goeke, R., Greenhill, L. J., Hewitt, J. N., Hurley-Walker, N., Johnston-Hollitt, M., Kaplan, D. L., Kasper, J. C., Kim, H. S., Kratzenberg, E., Lenc, E., Line, J., Loeb, A., Lonsdale, C. J., Lynch, M. J., McKinley, B., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Neben, A. R., Thyagarajan, N., Oberoi, D., Offringa, A. R., Ord, S. M., Paul, S., Prabu, T., Procopio, P., Riding, J., Rogers, A. E. E., Roshi, A., Shankar, N. Udaya, Sethi, Shiv K., Srivani, K. S., Subrahmanyan, R., Tegmark, M., Tingay, S. J., Waterson, M., Wayth, R. B., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L., Wu, C., Wyithe, J. S. B.
We present the 21 cm power spectrum analysis approach of the Murchison Widefield Array Epoch of Reionization project. In this paper, we compare the outputs of multiple pipelines for the purpose of validating statistical limits cosmological hydrogen a
Externí odkaz:
http://arxiv.org/abs/1605.06978
Autor:
Zheng, H., Tegmark, M., Dillon, J., Liu, A., Neben, A. R., Tribiano, S., Bradley, R., Buza, V., Ewall-Wice, A., Gharibyan, H., Hickish, J., Kunz, E., Losh, J., Lutomirski, A., Morgan, E., Morrison, S., Narayanan, S., Perko, A., Rosner, D., Sanchez, N., Schutz, K., Valdez, M., Villasenor, J., Yang, H., Zarb-Adami, K., Zelko, I., Zheng, K.
We present a new method for interferometric imaging that is ideal for the large fields of view and compact arrays common in 21 cm cosmology. We first demonstrate the method with simulations for two very different low frequency interferometers, the Mu
Externí odkaz:
http://arxiv.org/abs/1605.03980
Autor:
Ewall-Wice, A., Dillon, Joshua S., Hewitt, J. N., Loeb, A., Mesinger, A., Neben, A. R., Offringa, A. R., Tegmark, M., Barry, N., Beardsley, A. P., Bernardi, G., Bowman, Judd D., Briggs, F., Cappallo, R. J., Carroll, P., Corey, B. E., de Oliveira-Costa, A., Emrich, D., Feng, L., Gaensler, B. M., Goeke, R., Greenhill, L. J., Hazelton, B. J., Hurley-Walker, N., Johnston-Hollitt, M., Jacobs, Daniel C., Kaplan, D. L., Kasper, J. C., Kim, HS, Kratzenberg, E., Lenc, E., Line, J, Lonsdale, C. J., Lynch, M. J., McKinley, B., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Thyagarajan, Nithyanandan, Oberoi, D., Ord, S. M., Paul, S., Pindor, B., Pober, J. C., Prabu, T., Procopio, P., Riding, J., Rogers, A. E. E., Roshi, A., Shankar, N. Udaya, Sethi, Shiv K., Srivani, K. S., Subrahmanyan, R., Sullivan, I. S., Tingay, S. J., Trott, C. M., Waterson, M., Wayth, R. B., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L., Wu, C., Wyithe, J. S. B.
We present first results from radio observations with the Murchison Widefield Array seeking to constrain the power spectrum of 21 cm brightness temperature fluctuations between the redshifts of 11.6 and 17.9 (113 and 75 MHz). Three hours of observati
Externí odkaz:
http://arxiv.org/abs/1605.00016