2013MNRAS.430.1961D

Query : 2013MNRAS.430.1961D

2013MNRAS.430.1961D - Mon. Not. R. Astron. Soc., 430, 1961-1969 (2013/April-2)

The radio source count at 93.2GHz from observations of 9C sources using AMI and CARMA.

DAVIES M.L., STEFAN I.I., BOLTON R.C., CARPENTER J.M., FRANZEN T.M.O., GRAINGE K.J.B., GREEN D.A., HOBSON M.P., HURLEY-WALKER N., LASENBY A.N., OLAMAIE M., PERROTT Y.C., POOLEY G.G., RILEY J.M., RODRIGUEZ-GONZALVEZ C., SAUNDERS R.D.E., SCAIFE A.M.M., SCHAMMEL M.P., SCOTT P.F., SHIMWELL T.W., TITTERINGTON D.J., WALDRAM E.M. and WHITTAM I.H.

Abstract (from CDS):

We present results from follow-up observations of a sample of 80 radio sources, originally detected as part of the 15.2-GHz Ninth Cambridge (9C) survey. The observations were carried out, close to simultaneously, at two frequencies: 15.7GHz, using the Arcminute Microkelvin Imager (AMI) Large Array, and 93.2GHz, using the Combined Array for Research in Millimeter-wave Astronomy (CARMA).

There is currently little direct information on the 90-GHz-band source count for S ≲ 1Jy. However, we have used the measured 15.7-to-93.2-GHz spectral-index distribution and 9C source count to predict the differential source count at 93.2GHz as 26±4(S/Jy)-2.15Jy-1 sr-1; our projection is estimated to be most accurate for 10 ≲ S ≲ 100 mJy.

Our estimated differential count is more than twice the 90-GHz prediction made by Waldram et al.; we believe that this discrepancy is because the measured 43-GHz flux densities used in making their prediction were too low. Similarly, our prediction is significantly higher than that of Sadler et al. at 95GHz. Since our spectral-index distribution is similar to the 20-to-95-GHz distribution measured by Sadler et al. and used in making their prediction, we believe that the difference is almost entirely attributable to the dissimilarity in the lower frequency counts used in making the estimates.


Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): surveys - galaxies: active - radio continuum: general

VizieR on-line data: <Available at CDS (J/MNRAS/430/1961): table1.dat>

Simbad objects: 24

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Number of rows : 24
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 9C J0003+2740 QSO 00 03 13.0876118640 +27 40 44.973226704       17.90   ~ 15 1
2 9C J0003+3010 QSO 00 03 55.6584 +30 10 02.573       20.46   ~ 9 1
3 9C J0010+2854 QSO 00 10 27.7856311728 +28 54 58.741750944       19.56   ~ 14 1
4 NVSS J001036+261918 Rad 00 10 36.21480 +26 19 17.8100           ~ 10 1
5 NVSS J001247+335338 Bla 00 12 47.38217291 +33 53 38.4715185       20.15   ~ 42 1
6 9C J0012+3053 Rad 00 12 50.4 +30 53 23       19.82   ~ 3 0
7 3C 6 Rad 00 15 06.14742346 +32 16 13.3093056   18.0 16.8 15.61   ~ 33 1
8 NVSS J002050+315229 Rad 00 20 50.6269 +31 52 29.382           ~ 6 1
9 9C J0024+2911 QSO 00 24 34.417 +29 11 26.64       17.44   ~ 10 0
10 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
11 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
12 9C J1503+4528 rG 15 03 +45.5           ~ 8 0
13 NVSS J151756+393641 Rad 15 17 56.873 +39 36 41.79       19.90   ~ 5 0
14 9C J1521+4336 Bla 15 21 49.61387806 +43 36 39.2681695   19.30 18.95 18.09   ~ 129 1
15 NVSS J152609+371232 rG 15 26 09.78540 +37 12 33.0415       20.80   ~ 6 1
16 NVSS J152645+420144 Rad 15 26 45.48 +42 01 44.1       19.10   ~ 8 0
17 ICRF J152837.0+381605 Sy1 15 28 37.0087 +38 16 05.932       20.30   ~ 25 1
18 ICRF J153016.2+375831 Sy2 15 30 16.2530 +37 58 31.162       17.10   ~ 32 1
19 NVSS J155415+435027 Rad 15 54 15.6850 +43 50 26.074           ~ 7 1
20 9C J1554+4348 QSO 15 54 42.1521327480 +43 48 20.534504040   21.00 20.37 19.10   ~ 25 1
21 FBQS J1556+4259 QSO 15 56 57.7153388400 +42 59 43.902319632   18.57 18.41 17.14   ~ 43 1
22 4C 38.41 Bla 16 35 15.49297809 +38 08 04.5005995   18.14 17.97 17.25   ~ 906 1
23 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 837 0
24 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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