Limits of noise and confusion in the MWA GLEAM year 1 survey

T. M. O. Franzen; C. A. Jackson; J. R. Callingham; R. D. Ekers; P. J. Hancock; N. Hurley-Walker; J. Morgan; N. Seymour; R. B. Wayth; S. V. White; M. E. Bell; K. S. Dwarakanath; B. For; B. M. Gaensler; L. Hindson; M. Johnston-Hollitt; A. D. Kapinska; E. Lenc; B. McKinley; A. R. Offringa; P. Procopio; L. Staveley-Smith; C. Wu; Q. Zheng

Limits of noise and confusion in the MWA GLEAM year 1 survey

T. M. O. Franzen, C. A. Jackson, J. R. Callingham, R. D. Ekers, P. J. Hancock, N. Hurley-Walker, J. Morgan, N. Seymour, R. B. Wayth, S. V. White, M. E. Bell, K. S. Dwarakanath, B. For, B. M. Gaensler, L. Hindson, M. Johnston-Hollitt, A. D. Kapinska, E. Lenc, B. McKinley, A. R. OffringaP. Procopio, L. Staveley-Smith, C. Wu, Q. Zheng

Research output: Contribution to conference › Paper

34 Downloads (Pure)

Abstract

The GaLactic and Extragalactic All-sky MWA survey (GLEAM) is a new relatively low resolution, contiguous 72-231 MHz survey of the entire sky south of declination +25 deg. In this paper, we outline one approach to determine the relative contribution of system noise, classical confusion and sidelobe confusion in GLEAM images. An understanding of the noise and confusion properties of GLEAM is essential if we are to fully exploit GLEAM data and improve the design of future low-frequency surveys. Our early results indicate that sidelobe confusion dominates over the entire frequency range, implying that enhancements in data processing have the potential to further reduce the noise.

Original language	English
Publication status	Published - 20 Oct 2015
Event	The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges - CNR RESEARCH AREA, 101 VIA GOBETTI, Bologne, Italy Duration: 20 Oct 2015 → 23 Oct 2015

Conference

Conference	The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges
Country/Territory	Italy
City	Bologne
Period	20/10/15 → 23/10/15

Keywords

astro-ph.IM

Access to Document

1604.04447Accepted author manuscript, 266 KB

Cite this

Franzen, T. M. O., Jackson, C. A., Callingham, J. R., Ekers, R. D., Hancock, P. J., Hurley-Walker, N., Morgan, J., Seymour, N., Wayth, R. B., White, S. V., Bell, M. E., Dwarakanath, K. S., For, B., Gaensler, B. M., Hindson, L., Johnston-Hollitt, M., Kapinska, A. D., Lenc, E., McKinley, B., ... Zheng, Q. (2015). Limits of noise and confusion in the MWA GLEAM year 1 survey. Paper presented at The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges, Bologne, Italy.

@conference{311ba68cb7c84f8eb02028aa4b8c5ba0,

title = "Limits of noise and confusion in the MWA GLEAM year 1 survey",

abstract = "The GaLactic and Extragalactic All-sky MWA survey (GLEAM) is a new relatively low resolution, contiguous 72-231 MHz survey of the entire sky south of declination +25 deg. In this paper, we outline one approach to determine the relative contribution of system noise, classical confusion and sidelobe confusion in GLEAM images. An understanding of the noise and confusion properties of GLEAM is essential if we are to fully exploit GLEAM data and improve the design of future low-frequency surveys. Our early results indicate that sidelobe confusion dominates over the entire frequency range, implying that enhancements in data processing have the potential to further reduce the noise.",

keywords = "astro-ph.IM",

author = "Franzen, {T. M. O.} and Jackson, {C. A.} and Callingham, {J. R.} and Ekers, {R. D.} and Hancock, {P. J.} and N. Hurley-Walker and J. Morgan and N. Seymour and Wayth, {R. B.} and White, {S. V.} and Bell, {M. E.} and Dwarakanath, {K. S.} and B. For and Gaensler, {B. M.} and L. Hindson and M. Johnston-Hollitt and Kapinska, {A. D.} and E. Lenc and B. McKinley and Offringa, {A. R.} and P. Procopio and L. Staveley-Smith and C. Wu and Q. Zheng",

note = "T.M.O. Franzen, C.A. Jackson, J.R. Callingham, R.D. Ekers, P.J. Hancock, N. Hurley-Walker, J. Morgan, N. Seymour, R.B. Wayth, S.V. White, M.E. Bell, K.S. Dwarakanath, B.Q. For, B.M. Gaensler, L. Hindson, M. Johnston-Hollitt, A.D. Kapinska, E. Lenc, B. McKinley, A.R. Offringa, P. Procopio, L. Staveley-Smith, C. Wu, Q. Zheng, {\textquoteleft}Limits of noise and confusion in the MWA GLEAM year 1 survey{\textquoteright}, paper presented at the The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges, Bologna, Italy, 20-23 October, 2015. ; The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges ; Conference date: 20-10-2015 Through 23-10-2015",

year = "2015",

month = oct,

day = "20",

language = "English",

}

Franzen, TMO, Jackson, CA, Callingham, JR, Ekers, RD, Hancock, PJ, Hurley-Walker, N, Morgan, J, Seymour, N, Wayth, RB, White, SV, Bell, ME, Dwarakanath, KS, For, B, Gaensler, BM, Hindson, L, Johnston-Hollitt, M, Kapinska, AD, Lenc, E, McKinley, B, Offringa, AR, Procopio, P, Staveley-Smith, L, Wu, C & Zheng, Q 2015, 'Limits of noise and confusion in the MWA GLEAM year 1 survey', Paper presented at The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges, Bologne, Italy, 20/10/15 - 23/10/15.

TY - CONF

T1 - Limits of noise and confusion in the MWA GLEAM year 1 survey

AU - Franzen, T. M. O.

AU - Jackson, C. A.

AU - Callingham, J. R.

AU - Ekers, R. D.

AU - Hancock, P. J.

AU - Hurley-Walker, N.

AU - Morgan, J.

AU - Seymour, N.

AU - Wayth, R. B.

AU - White, S. V.

AU - Bell, M. E.

AU - Dwarakanath, K. S.

AU - For, B.

AU - Gaensler, B. M.

AU - Hindson, L.

AU - Johnston-Hollitt, M.

AU - Kapinska, A. D.

AU - Lenc, E.

AU - McKinley, B.

AU - Offringa, A. R.

AU - Procopio, P.

AU - Staveley-Smith, L.

AU - Wu, C.

AU - Zheng, Q.

N1 - T.M.O. Franzen, C.A. Jackson, J.R. Callingham, R.D. Ekers, P.J. Hancock, N. Hurley-Walker, J. Morgan, N. Seymour, R.B. Wayth, S.V. White, M.E. Bell, K.S. Dwarakanath, B.Q. For, B.M. Gaensler, L. Hindson, M. Johnston-Hollitt, A.D. Kapinska, E. Lenc, B. McKinley, A.R. Offringa, P. Procopio, L. Staveley-Smith, C. Wu, Q. Zheng, ‘Limits of noise and confusion in the MWA GLEAM year 1 survey’, paper presented at the The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges, Bologna, Italy, 20-23 October, 2015.

PY - 2015/10/20

Y1 - 2015/10/20

N2 - The GaLactic and Extragalactic All-sky MWA survey (GLEAM) is a new relatively low resolution, contiguous 72-231 MHz survey of the entire sky south of declination +25 deg. In this paper, we outline one approach to determine the relative contribution of system noise, classical confusion and sidelobe confusion in GLEAM images. An understanding of the noise and confusion properties of GLEAM is essential if we are to fully exploit GLEAM data and improve the design of future low-frequency surveys. Our early results indicate that sidelobe confusion dominates over the entire frequency range, implying that enhancements in data processing have the potential to further reduce the noise.

AB - The GaLactic and Extragalactic All-sky MWA survey (GLEAM) is a new relatively low resolution, contiguous 72-231 MHz survey of the entire sky south of declination +25 deg. In this paper, we outline one approach to determine the relative contribution of system noise, classical confusion and sidelobe confusion in GLEAM images. An understanding of the noise and confusion properties of GLEAM is essential if we are to fully exploit GLEAM data and improve the design of future low-frequency surveys. Our early results indicate that sidelobe confusion dominates over the entire frequency range, implying that enhancements in data processing have the potential to further reduce the noise.

KW - astro-ph.IM

M3 - Paper

T2 - The Many Facests of Extragalactiv Radio Surveys: Towards New Scientific Challenges

Y2 - 20 October 2015 through 23 October 2015

ER -

Limits of noise and confusion in the MWA GLEAM year 1 survey

Abstract

Conference

Keywords

Access to Document

Fingerprint

Cite this