2017MNRAS.464.1146H


Query : 2017MNRAS.464.1146H

2017MNRAS.464.1146H - Mon. Not. R. Astron. Soc., 464, 1146-1167 (2017/January-1)

GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey - I. A low-frequency extragalactic catalogue.

HURLEY-WALKER N., CALLINGHAM J.R., HANCOCK P.J., FRANZEN T.M.O., HINDSON L., KAPINSKA A.D., MORGAN J., OFFRINGA A.R., WAYTH R.B., WU C., ZHENG Q., MURPHY T., BELL M.E., DWARAKANATH K.S., FOR B., GAENSLER B.M., JOHNSTON-HOLLITT M., LENC E., PROCOPIO P., STAVELEY-SMITH L., EKERS R., BOWMAN J.D., BRIGGS F., CAPPALLO R.J., DESHPANDE A.A., GREENHILL L., HAZELTON B.J., KAPLAN D.L., LONSDALE C.J., McWHIRTER S.R., MITCHELL D.A., MORALES M.F., MORGAN E., OBEROI D., ORD S.M., PRABU T., UDAYA SHANKAR N., SRIVANI K.S., SUBRAHMANYAN R., TINGAY S.J., WEBSTER R.L., WILLIAMS A. and WILLIAMS C.L.

Abstract (from CDS):

Using the Murchison Widefield Array (MWA), the low-frequency Square Kilometre Array precursor located in Western Australia, we have completed the GaLactic and Extragalactic All-sky MWA (GLEAM) survey, and present the resulting extragalactic catalogue, utilizing the first year of observations. The catalogue covers 24 831 square degrees, over declinations south of +30° and Galactic latitudes outside 10° of the Galactic plane, excluding some areas such as the Magellanic Clouds. It contains 307 455 radio sources with 20 separate flux density measurements across 72-231 MHz, selected from a time- and frequency-integrated image centred at 200 MHz, with a resolution of ≃2 arcmin. Over the catalogued region, we estimate that the catalogue is 90 per cent complete at 170 mJy, and 50 per cent complete at 55 mJy, and large areas are complete at even lower flux density levels. Its reliability is 99.97 per cent above the detection threshold of 5σ, which itself is typically 50 mJy. These observations constitute the widest fractional bandwidth and largest sky area survey at radio frequencies to date, and calibrate the low-frequency flux density scale of the southern sky to better than 10 per cent. This paper presents details of the flagging, imaging, mosaicking and source extraction/characterization, as well as estimates of the completeness and reliability. All source measurements and images are available online.1 This is the first in a series of publications describing the GLEAM survey results.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: interferometric - surveys - galaxies: general - galaxies: general

VizieR on-line data: <CDS Catalogue: VIII/100>

Nomenclature: GLEAM JHHMMSS+DDMMSS N=307455.

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 PKS 0008-42 Rad 00 10 52.51756175 -41 53 10.7788843   22.0       ~ 69 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10475 1
3 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2708 2
4 PKS J0141-2706 rG 01 41 27.16 -27 06 06.6           ~ 23 1
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6512 1
6 PKS J0312-1450 rG 03 12 46.30 -14 49 52.0           ~ 27 1
7 NAME Pic A Sy1 05 19 49.7229323856 -45 46 43.852662732   15.73 15.77 14.85   ~ 624 1
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16422 1
9 M 1 SNR 05 34 32 +22 00.8           ~ 5980 1
10 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 976 1
11 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 6789 3
12 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4303 3
13 NAME Hercules A rG 16 51 07.9886687784 +04 59 35.547131472     18.25     ~ 449 1
14 NAME Cyg A Sy2 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2271 2
15 QSO B2059-786 QSO 21 05 44.96140361 -78 25 34.5469664   21.59 21 20.20   ~ 38 1
16 2MASX J22142575-1701362 G 22 14 25.752 -17 01 36.29     17.8     ~ 159 1
17 NAME Cas A SNR 23 23 24.000 +58 48 54.00     14.30     ~ 2649 1
18 NAME SCP reg ~ ~           ~ 87 0

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2022.12.10-02:15:40

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