2016MNRAS.461.4151C

Query : 2016MNRAS.461.4151C

2016MNRAS.461.4151C - Mon. Not. R. Astron. Soc., 461, 4151-4175 (2016/October-1)

A high reliability survey of discrete Epoch of Reionization foreground sources in the MWA EoR0 field.

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 H., 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., UDAYA SHANKAR N., SETHI S.K., SRIVANI K.S., SUBRAHMANYAN R., TEGMARK M., THYAGARAJAN N., TINGAY S.J., TROTT C.M., WATERSON M., WAYTH R.B., WHITNEY A.R., WILLIAMS A., WILLIAMS C.L., WU C. and WYITHE J.S.B.

Abstract (from CDS):

Detection of the epoch of reionization H i 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 in the RA=0 field of the Murchison Widefield Array Epoch of Reionization observation programme. Motivated by unprecedented requirements for precision and reliability we develop new methods for source finding and selection. We apply machine learning methods to self-consistently classify the relative reliability of 9490 source candidates. A subset of 7466 are selected based on reliability class and signal-to-noise ratio criteria. These are statistically cross-matched to four other radio surveys using both position and flux density information. We find 7369 sources to have confident matches, including 90 partially resolved sources that split into a total of 192 sub-components. An additional 25 unmatched sources are included as new radio detections. The catalogue sources have a median spectral index of -0.85. Spectral flattening is seen towards lower frequencies with a median of -0.71 predicted at 182 MHz. The astrometric error is 7 arcsec compared to a 2.3 arcmin beam FWHM. The resulting catalogue covers ∼1400 deg2 and is complete to approximately 80 mJy within half beam power. This provides the most reliable discrete source sky model available to date in the MWA EoR0 field for precision foreground subtraction.

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

Journal keyword(s): catalogues - catalogues

VizieR on-line data: <Available at CDS (J/MNRAS/461/4151): kgs.dat>

Nomenclature: kgs.dat: KGS JHHMMSS+DDMMSS N=7394.

Simbad objects: 36

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Number of rows : 36
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2dFGRS TGS198Z035 G 00 02 19.63 -27 50 55.8   19.400   18.676   ~ 2 0
2 PKS 0005-199 rG 00 08 18.855 -19 39 49.48   16.5       ~ 14 1
3 ACO 2 ClG 00 08 27 -19 38.3           ~ 16 1
4 ACO 2730 ClG 00 09 56.417 -35 41 00.96           ~ 23 0
5 2MASX J00095865-3539515 GiC 00 09 58.6760390136 -35 39 51.659829432           ~ 2 0
6 2dFGRS TGS279Z095 G 00 10 03.3864 -28 29 47.436   19.444   18.184   ~ 3 0
7 APMCC 14 ClG 00 10 53.84 -34 15 01.4           ~ 3 0
8 2dFGRS TGS495Z294 G 00 10 56.1980629466 -34 12 47.934310390   19.090   17.741   ~ 3 0
9 NVSS J001436-262216 Rad 00 14 36.90 -26 22 16.5           ~ 1 0
10 NGC 55 rG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 828 2
11 2dFGRS TGS436Z221 G 00 16 58.70 -31 21 50.2   18.826   17.440   ~ 2 0
12 ACO 27 ClG 00 24 52.8 -20 40 45           ~ 34 0
13 QSO B0023-263 BLL 00 25 49.15629900 -26 02 12.6141092   20.30 19.5 18.084   ~ 173 1
14 SUMSS J004550-420501 Rad 00 45 50.40 -42 05 01.1           ~ 1 0
15 LEDA 2702 Sy2 00 46 17.7417441048 -42 07 51.432348432   17   15.78   ~ 93 0
16 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
17 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 526 0
18 PKS 0113-320 Rad 01 15 36.3 -31 46 59           ~ 1 0
19 PKS 0128-264 Rad 01 30 28.7 -26 10 06           ~ 7 0
20 IC 1459 rG 22 57 10.60682195 -36 27 43.9966421   10.96 11.85 9.34 10.3 ~ 652 2
21 [CMW2004] 339 G 23 11 26.83 -23 14 51.2           ~ 2 0
22 2MASX J23130539-2307369 G 23 13 05.3626374168 -23 07 37.367579568           ~ 3 0
23 LEDA 2831642 Sy1 23 13 10.4588108112 -31 57 52.805275740   17.67 16.6 16.77   ~ 34 1
24 ACO S 1099 ClG 23 13 15.7 -23 08 40           ~ 4 0
25 [VV2006] J231927.8-302845 QSO 23 19 27.7393196544 -30 28 45.392940336   18.75       ~ 7 0
26 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
27 2dFGRS TGS128Z262 G 23 29 28.48 -25 57 52.8   19.278   18.401   ~ 2 0
28 ACO S 1136 ClG 23 36 14.3 -31 36 24           ~ 27 0
29 2dFGRS TGS194Z277 G 23 43 40.5 -26 31 05   18.854   18.611   ~ 3 0
30 ACO 4037 ClG 23 47 16.57 -28 17 31.3           ~ 7 0
31 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 349 3
32 QSO B2345-167 Bla 23 48 02.60851466 -16 31 12.0222546   18.00 18.41 16.86   ~ 432 1
33 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0
34 2dFGRS TGS132Z149 G 23 51 40.36367 -25 59 48.2570   17.492   15.974   ~ 4 0
35 MCG-06-01-008 QSO 23 57 00.7406438328 -34 45 32.994968292   13.89 13.26 12.19   ~ 131 2
36 NGC 7793 GiG 23 57 49.7540045856 -32 35 27.701550744 10.26 9.74 9.28 9.06 9.7 ~ 1188 2

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