Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Whitney, Alan"'
Autor:
Suresh, Akshay, Sharma, Rohit, Oberoi, Divya, Das, Srijan B., Pankratius, Victor, Timar, Brian, Lonsdale, Colin J., Bowman, Judd D., Briggs, Frank, Cappallo, Roger J., Corey, Brian E., Deshpande, Avinash A., Emrich, David, Goeke, Robert, Greenhill, Lincoln J., Hazelton, Bryna J., Johnston-Hollitt, Melanie, Kaplan, David L., Kasper, Justin C., Kratzenberg, Eric, Lynch, Mervyn J., McWhirter, S. Russell, Mitchell, Daniel A., Morales, Miguel F., Morgan, Edward, Ord, Stephen M., Prabu, Thiagaraj, Rogers, Alan E. E., Roshi, Anish, Shankar, N. Udaya, Srivani, K. S., Subrahmanyan, Ravi, Tingay, Steven J., Waterson, Mark, Wayth, Randall B., Webster, Rachel L., Whitney, Alan R., Williams, Andrew, Williams, Christopher L.
Low radio frequency solar observations using the Murchison Widefield Array have recently revealed the presence of numerous weak, short-lived and narrow-band emission features, even during moderately quiet solar conditions. These non-thermal features
Externí odkaz:
http://arxiv.org/abs/1612.01016
Autor:
Prabu, Thiagaraj, Srivani, K. S., Roshi, D. Anish, Kamini, P. A., Madhavi, S., Emrich, David, Crosse, Brian, Williams, Andrew J., Waterson, Mark, Deshpande, Avinash A., Shankar, N. Udaya, Subrahmanyan, Ravi, Briggs, Frank H., Goeke, Robert F., Tingay, Steven J., Johnston-Hollitt, Melanie, R, Gopalakrishna M, Morgan, Edward H., Pathikulangara, Joseph, Bunton, John D., Hampson, Grant, Williams, Christopher, Ord, Stephen M., Wayth, Randall B., Kumar, Deepak, Morales, Miguel F., deSouza, Ludi, Kratzenberg, Eric, Pallot, D., McWhirter, Russell, Hazelton, Bryna J., Arcus, Wayne, Barnes, David G., Bernardi, Gianni, Booler, T., Bowman, Judd D., Cappallo, Roger J., Corey, Brian E., Greenhill, Lincoln J., Herne, David, Hewitt, Jacqueline N., Kaplan, David L., Kasper, Justin C., Kincaid, Barton B., Koenig, Ronald, Lonsdale, Colin J., Lynch, Mervyn J., Mitchell, Daniel A., Oberoi, Divya, Remillard, Ronald A., Rogers, Alan E., Salah, Joseph E., Sault, Robert J., Stevens, Jamie B., Tremblay, S. E., Webster, Rachel L., Whitney, Alan R., Wyithe, Stuart B.
An FPGA-based digital-receiver has been developed for a low-frequency imaging radio interferometer, the Murchison Widefield Array (MWA). The MWA, located at the Murchison Radio-astronomy Observatory (MRO) in Western Australia, consists of 128 dual-po
Externí odkaz:
http://arxiv.org/abs/1502.05015
Autor:
Hurley-Walker, Natasha, Johnston-Hollitt, Melanie, Ekers, Ron, Hunstead, Richard, Sadler, Elaine M., Hindson, Luke, Hancock, Paul, Bernardi, Gianni, Bowman, Judd D., Briggs, Frank, Cappallo, Roger, Corey, Brian, Deshpande, Avinash A., Emrich, David, Gaensler, Bryan M., Goeke, Robert, Greenhill, Lincoln, Hazelton, Bryna J., Hewitt, Jacqueline, Kaplan, David L., Kasper, Justin, Kratzenberg, Eric, Lonsdale, Colin, Lynch, Mervyn, Mitchell, Daniel, McWhirter, Russell, Morales, Miguel, Morgan, Edward, Oberoi, Divya, Offringa, Andre, Ord, Stephen, Prabu, Thiagaraj, Rogers, Alan, Roshi, Anish, Shankar, Udaya, Srivani, K., Subrahmanyan, Ravi, Tingay, Steven, Waterson, Mark, Wayth, Randall B., Webster, Rachel, Whitney, Alan, Williams, Andrew, Williams, Chris
Recent observations with the Murchison Widefield Array at 185~MHz have serendipitously unveiled a heretofore unknown giant and relatively nearby ($z = 0.0178$) radio galaxy associated with NGC\,1534. The diffuse emission presented here is the first i
Externí odkaz:
http://arxiv.org/abs/1412.3856
Autor:
Hurley-Walker, Natasha, Morgan, John, Wayth, Randall B., Hancock, Paul J., Bell, Martin E., Bernardi, Gianni, Bhat, Ramesh, Briggs, Frank, Deshpande, Avinash A., Ewall-Wice, Aaron, Feng, Lu, Hazelton, Bryna J., Hindson, Luke, Jacobs, Daniel C., Kudryavtseva, David L. Kaplan Nadia, Lenc, Emil, McKinley, Benjamin, Mitchell, Daniel, Pindor, Bart, Procopio, Pietro, Oberoi, Divya, Offringa, André, Ord, Stephen, Riding, Jennifer, Bowman, Judd D., Cappallo, Roger, Corey, Brian, Emrich, David, Gaensler, B. M., Goeke, Robert, Greenhill, Lincoln, Hewitt, Jacqueline, Johnston-Hollitt, Melanie, Kasper, Justin, Kratzenberg, Eric, Lonsdale, Colin, Lynch, Mervyn, McWhirter, Russell, Morales, Miguel F., Morgan, Edward, Prabu, Thiagaraj, Rogers, Alan, Roshi, Anish, Shankar, Udaya, Srivani, K., Subrahmanyan, Ravi, Tingay, Steven, Waterson, Mark, Webster, Rachel, Whitney, Alan, Williams, Andrew, Williams, Chris
We present the results of an approximately 6,100 square degree 104--196MHz radio sky survey performed with the Murchison Widefield Array during instrument commissioning between 2012 September and 2012 December: the Murchison Widefield Array Commissio
Externí odkaz:
http://arxiv.org/abs/1410.0790
Autor:
Bhat, N. D. Ramesh, Ord, S. M., Tremblay, S. E., Tingay, S. J., Deshpande, Avinash, van Straten, W., Oronsaye, S., Bernardi, G., Bowman, Judd, Briggs, F., Cappallo, R. J., Corey, Brian, Emerich, D., Goeke, R, Greenhill, Lincoln, Hazelton, Bryna, Hewitt, Jacqueline N., Johnston-Hollitt, Melanie, Kaplan, David, Kasper, Justin, Kratzenberg, E., Lonsdale, C. J., Lynch, M. J., McWhirter, S., Mitchell, D. A., Morales, Miguel, Morgan, Edward H., Oberoi, Divya, Prabu, Thayagaraja, Rogers, Alan E. E., Roshi, D. A., Udayashankar, N., Srivani, K. S., Subramanyan, R., Waterson, M., Wayth, Randall, Webster, Rachel, Whitney, Alan, Williams, A., Wiliams, C. L.
We report on the detection of the millisecond pulsar PSR J0437-4715 with the Murchison Widefield Array (MWA) at a frequency of 192 MHz. Our observations show rapid modulations of pulse intensity in time and frequency that arise from diffractive scint
Externí odkaz:
http://arxiv.org/abs/1407.4745
Autor:
Paul, Sourabh, Sethi, Shiv K., Subrahmanyan, Ravi, Shankar, N. Udaya, Dwarakanath, K. S., Deshpande, Avinash A., Bernardi, Gianni, Bowman, Judd D., Briggs, Frank, Cappallo, Roger J., Corey, Brian E., Emrich, David, Gaensler, Bryan M., Goeke, Robert F., Greenhill, Lincoln J., Hazelton, Bryna J., Hewitt, Jacqueline N., Johnston-Hollitt, Melanie, Kaplan, David L., Kasper, Justin C., Kratzenberg, Eric, Lonsdale, Colin J., Lynch, Mervyn J., McWhirter, S. Russell, Mitchell, Daniel A., Morales, Miguel F., Morgan, Edward H., Oberoi, Divya, Ord, Stephen M., Prabu, Thiagaraj, Rogers, Alan E. E., Roshi, Anish A., Srivani, K. S., Tingay, Steven J., Wayth, Randall B., Waterson, Mark, Webster, Rachel L., Whitney, Alan R., Williams, Andrew J., Williams, Christopher L.
Publikováno v:
2014 ApJ 793 28
The detection of the Epoch of Reionization (EoR) in the redshifted 21-cm line is a challenging task. Here we formulate the detection of the EoR signal using the drift scan strategy. This method potentially has better instrumental stability as compare
Externí odkaz:
http://arxiv.org/abs/1407.4620
Autor:
Thyagarajan, Nithyanandan, Shankar, N. Udaya, Subrahmanyan, Ravi, Arcus, Wayne, Bernardi, Gianni, Bowman, Judd D., Briggs, Frank, Bunton, John D., Cappallo, Roger J., Corey, Brian E., deSouza, Ludi, Emrich, David, Gaensler, Bryan M., Goeke, Robert F., Greenhill, Lincoln J., Hazelton, Bryna J., Herne, David, Hewitt, Jacqueline N., Johnston-Hollitt, Melanie, Kaplan, David L., Kasper, Justin C., Kincaid, Barton B., Koenig, Ronald, Kratzenberg, Eric, Lonsdale, Colin J., Lynch, Mervyn J., McWhirter, S. Russell, Mitchell, Daniel A., Morales, Miguel F., Morgan, Edward H., Oberoi, Divya, Ord, Stephen M., Pathikulangara, Joseph, Remillard, Ronald A., Rogers, Alan E. E., Roshi, Anish A., Salah, Joseph E., Sault, Robert J., Srivani, K. S., Stevens, Jamie B., Thiagaraj, Prabu, Tingay, Steven J., Wayth, Randall B., Waterson, Mark, Webster, Rachel L., Whitney, Alan R., Williams, Andrew J., Williams, Christopher L., Wyithe, J. Stuart B.
In this paper we explore for the first time the relative magnitudes of three fundamental sources of uncertainty, namely, foreground contamination, thermal noise and sample variance in detecting the HI power spectrum from the Epoch of Reionization (Eo
Externí odkaz:
http://arxiv.org/abs/1308.0565
Autor:
Bowman, Judd D., Cairns, Iver, Kaplan, David L., Murphy, Tara, Oberoi, Divya, Staveley-Smith, Lister, Arcus, Wayne, Barnes, David G., Bernardi, Gianni, Briggs, Frank H., Brown, Shea, Bunton, John D., Burgasser, Adam J., Cappallo, Roger J., Chatterjee, Shami, Corey, Brian E., Coster, Anthea, Deshpande, Avinash, deSouza, Ludi, Emrich, David, Erickson, Philip, Goeke, Robert F., Gaensler, B. M., Greenhill, Lincoln J., Harvey-Smith, Lisa, Hazelton, Bryna J., Herne, David, Hewitt, Jacqueline N., Johnston-Hollitt, Melanie, Kasper, Justin C., Kincaid, Barton B., Koenig, Ronald, Kratzenberg, Eric, Lonsdale, Colin J., Lynch, Mervyn J., Matthews, Lynn D., McWhirter, S. Russell, Mitchell, Daniel A., Morales, Miguel F., Morgan, Edward H., Ord, Stephen M., Pathikulangara, Joseph, Thiagaraj, Prabu, Remillard, Ronald A., Robishaw, Timothy, Rogers, Alan E. E., Roshi, Anish A., Salah, Joseph E., Sault, Robert J., Shankar, N. Udaya, Srivani, K. S., Stevens, Jamie B., Subrahmanyan, Ravi, Tingay, Steven J., Wayth, Randall B., Waterson, Mark, Webster, Rachel L., Whitney, Alan R., Williams, Andrew J., Williams, Christopher L., Wyithe, J. Stuart B.
Significant new opportunities for astrophysics and cosmology have been identified at low radio frequencies. The Murchison Widefield Array is the first telescope in the Southern Hemisphere designed specifically to explore the low-frequency astronomica
Externí odkaz:
http://arxiv.org/abs/1212.5151
Autor:
Whitney, Alan R., Beaudoin, Christopher J., Cappallo, Roger J., Corey, Brian E., Crew, Geoffrey B., Doeleman, Shepherd S., Lapsley, David E., Hinton, Alan A., McWhirter, Stephen R., Niell, Arthur E., Rogers, Alan E. E., Ruszczyk, Chester A., Smythe, Daniel L., SooHoo, Jason, Titus, Michael A.
The recent development of a relatively inexpensive 16-Gbps data-recording system based on commercial off-the-shelf technology and open-source software, along with parallel development in broadband Very Long Baseline Interferometry (VLBI) techniques,
Externí odkaz:
http://arxiv.org/abs/1210.5961
Autor:
Sullivan, Ian, Morales, Miguel, Hazelton, Bryna, Arcus, Wayne, Barnes, David, Bernardi, Gianni, Briggs, Frank, Bowman, Judd D., Bunton, John, Cappallo, Roger, Corey, Brian, Deshpande, Avinash, deSouza, Ludi, Emrich, David, Gaensler, B. M., Goeke, Robert, Greenhill, Lincoln, Herne, David, Hewitt, Jacqueline, Johnston-Hollitt, Melanie, Kaplan, David, Kasper, Justin, Kincaid, Barton, Koenig, Ronald, Kratzenberg, Eric, Lonsdale, Colin, Lynch, Mervyn, McWhirter, Russell, Mitchell, Daniel, Morgan, Edward, Oberoi, Divya, Ord, Stephen, Pathikulangara, Joseph, Prabu, Thiagaraj, Remillard, Ron, Rogers, Alan, Roshi, Anish, Salah, Joseph, Sault, Robert, Shankar, Udaya, Srivani, K., Stevens, Jamie, Subrahmanyan, Ravi, Tingay, Steven, Wayth, Randall, Waterson, Mark, Webster, Rachel, Whitney, Alan, Williams, Andrew, Williams, Chris, Wyithe, Stuart
Publikováno v:
2012 ApJ 759 17
We introduce the Fast Holographic Deconvolution method for analyzing interferometric radio data. Our new method is an extension of A-projection/software-holography/forward modeling analysis techniques and shares their precision deconvolution and wide
Externí odkaz:
http://arxiv.org/abs/1209.1653