Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Briggs, Frank"'
Autor:
Rhee, Jonghwan, Lah, Philip, Briggs, Frank H., Chengalur, Jayaram N., Colless, Matthew, Willner, Steven P., Ashby, Matthew L. N., Fèvre, Olivier Le
We use observations made with the Giant Metrewave Radio Telescope (GMRT) to probe the neutral hydrogen (HI) gas content of field galaxies in the VIMOS VLT Deep Survey (VVDS) 14h field at $z \approx 0.32$. Because the HI emission from individual galax
Externí odkaz:
http://arxiv.org/abs/1709.07596
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:
Hurley-Walker, Natasha, Callingham, Joseph R., Hancock, Paul J., Franzen, Thomas M. O., Hindson, Luke, Kapinska, Anna D., Morgan, John, Offringa, Andre R., Wayth, Randall B., Wu, Chen, Zheng, Q., Murphy, Tara, Bell, Martin E., Dwarakanath, K. S., For, Bi-Qing, Gaensler, Bryan M., Johnston-Hollitt, Melanie, Lenc, Emil, Procopio, Pietro, Staveley-Smith, Lister, Ekers, Ron, Bowman, Judd D., Briggs, Frank, Cappallo, R. J., Deshpande, Avinash A., Greenhill, Lincoln, Hazelton, Brynah J., Kaplan, David L., Lonsdale, Colin J., McWhirter, S. R., Mitchell, Daniel A., Morales, Miguel F., Morgan, Edward, Oberoi, Divya, Ord, Stephen M., Prabu, T., Shankar, N. Udaya, Srivani, K. S., Subrahmanyan, Ravi, Tingay, Steven J., Webster, Rachel L., Williams, Andrew, Williams, Christopher L.
Using the Murchison Widefield Array (MWA), the low-frequency Square Kilometre Array (SKA1 LOW) precursor located in Western Australia, we have completed the GaLactic and Extragalactic All-sky MWA (GLEAM) survey, and present the resulting extragalacti
Externí odkaz:
http://arxiv.org/abs/1610.08318
We present the results of HI spectral stacking analysis of Giant Metrewave Radio Telescope (GMRT) observations targeting the COSMOS field. The GMRT data cube contains 474 field galaxies with redshifts known from the zCOSMOS-bright 10k catalogue. Spec
Externí odkaz:
http://arxiv.org/abs/1605.02006
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:
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:
Rhee, Jonghwan, Zwaan, Martin A., Briggs, Frank H., Chengalur, Jayaram N., Lah, Philip, Oosterloo, Tom, van der Hulst, Thijs
We measure the neutral atomic hydrogen (HI) gas content of field galaxies at intermediate redshifts of z ~ 0.1 and z ~ 0.2 using hydrogen 21-cm emission lines observed with the Westerbork Synthesis Radio Telescope (WSRT). In order to make high signal
Externí odkaz:
http://arxiv.org/abs/1308.1462
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