2009AJ....138.1925M

Query : 2009AJ....138.1925M

2009AJ....138.1925M - Astron. J., 138, 1925-1937 (2009/December-0)

Radio-selected quasars in the Sloan digital sky survey.

McGREER I.D., HELFAND D.J. and WHITE R.L.

Abstract (from CDS):

We have conducted a pilot survey for z > 3.5 quasars by combining the FIRST radio survey with the Sloan Digital Sky Survey (SDSS). While SDSS already targets FIRST sources for spectroscopy as quasar candidates, our survey includes fainter quasars and greatly improves the discovery rate by using strict astrometric criteria for matching the radio and optical positions. Our method allows for selection of high-redshift quasars with less color bias than with optical selection, as using radio selection essentially eliminates stellar contamination. We report the results of spectroscopy for 45 candidates, including 29 quasars in the range 0.37 < z < 5.2, with 7 having redshifts z > 3.5. We compare quasars selected using radio and optical criteria, and find that radio-selected quasars have a much higher fraction of moderately reddened objects. We derive a radio-loud quasar luminosity function at 3.5 < z < 4.0, and find that it is in good agreement with expectations from prior SDSS results.

Abstract Copyright: ∼

Journal keyword(s): quasars: general

Nomenclature: Table 2, Fig. 1: [MHW2009] JHHMMSS.s+DDMMSS N=45.

Simbad objects: 60

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Number of rows : 60
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 2MASS J07415470+2520294 QSO 07 41 54.7157646024 +25 20 29.575028292           ~ 12 0
2 SDSS J084223.80+205543.2 QSO 08 42 23.8053049536 +20 55 43.298139000   20.73 20.11     ~ 19 1
3 SDSS J085111.59+142337.7 QSO 08 51 11.5985268456 +14 23 37.714007112   22.80 21.59     ~ 20 0
4 SDSS J094533.51+261115.6 QSO 09 45 33.5096313864 +26 11 15.599279040   21.81 21.05     ~ 17 0
5 7C 102336.6+255813 QSO 10 26 23.62115 +25 42 59.4292   24.98 23.18     ~ 86 1
6 SDSS J103240.47+232820.5 QSO 10 32 40.4741550576 +23 28 20.492562180   21.10 20.32     ~ 19 0
7 SDSS J103418.65+203300.2 QSO 10 34 18.6401993568 +20 33 00.120930912           ~ 25 0
8 SDSS J113232.67+091428.1 QSO 11 32 32.6759956392 +09 14 28.080084840           ~ 11 0
9 SDSS J113418.10+284712.9 QSO 11 34 18.1073451984 +28 47 12.934019472           ~ 7 0
10 2MASS J11403230+2401171 QSO 11 40 32.2865225736 +24 01 17.912042580   21.2   19.3   ~ 3 0
11 SDSS J120407.84+484548.0 QSO 12 04 07.8475276800 +48 45 48.091000500           ~ 11 0
12 [VV2006] J121134.4+322616 QSO 12 11 34.3938963360 +32 26 15.208899756   21.87 20.55 19.2 18.5 ~ 21 0
13 SDSS J123128.23+184714.3 QSO 12 31 28.2298717920 +18 47 14.336540628   20.61 20.07     ~ 18 0
14 SDSS J123544.83+321945.9 QSO 12 35 44.8422434016 +32 19 45.932935296           ~ 9 0
15 SDSS J123547.98+090801.0 QSO 12 35 47.9817072672 +09 08 01.118921604           ~ 8 0
16 SDSS J130100.88+320727.4 QSO 13 01 00.8814015912 +32 07 27.461686944           ~ 4 0
17 SDSS J130906.69+315800.1 QSO 13 09 06.6919177728 +31 58 00.227447184   21.70 20.68     ~ 19 0
18 SDSS J131814.02+341805.6 QSO 13 18 14.0277450522 +34 18 05.628297028   24.20 22.32     ~ 18 0
19 SDSS J131901.74+114138.4 QSO 13 19 01.7441643096 +11 41 38.421270816           ~ 1 0
20 SDSS J132246.58+352848.5 QSO 13 22 46.5893774184 +35 28 48.580810500           ~ 10 0
21 FIRST J133630.2+411955 Rad 13 36 30.2914174680 +41 19 55.617937896           ~ 1 0
22 SDSS J135135.70+284014.8 QSO 13 51 35.7079123161 +28 40 14.757451139   24.53 22.83     ~ 16 0
23 SDSS J135316.83+095636.7 QSO 13 53 16.8315821784 +09 56 36.728713932   21.11 20.23     ~ 22 0
24 SDSS J135841.14+274708.1 QSO 13 58 41.1498316056 +27 47 08.147259420   21.95 21.17     ~ 19 0
25 SDSS J140459.92+182346.1 QSO 14 04 59.9260511664 +18 23 46.120547220           ~ 7 0
26 FIRST J140635.6+622543 QSO 14 06 35.6707612200 +62 25 43.334203260   21.05 20.25     ~ 4 0
27 SDSS J141123.07+080042.3 QSO 14 11 23.0710789392 +08 00 42.474704292           ~ 7 0
28 SDSS J141241.03+370100.9 QSO 14 12 41.0353578456 +37 01 01.014952548           ~ 11 0
29 SDSS J141657.71+112247.6 QSO 14 16 57.7101098328 +11 22 47.637632604   22.09 21.20     ~ 20 0
30 SDSS J141821.29+425020.2 QSO 14 18 21.2955621336 +42 50 20.174055108           ~ 14 1
31 SDSS J142048.01+120545.9 QSO 14 20 48.0094133568 +12 05 45.979158120   21.96 20.94     ~ 39 1
32 SDSS J142132.17+125735.9 QSO 14 21 32.1760038792 +12 57 35.946173736           ~ 8 0
33 FIRST J142332.0+055505 * 14 23 32.0074484544 +05 55 04.858880088           M4.5:III 1 0
34 SDSS J142634.84+543622.8 QSO 14 26 34.8539872614 +54 36 22.645243098           ~ 7 0
35 SDSS J143053.20+543538.5 QSO 14 30 53.2058527296 +54 35 38.571072144           ~ 10 0
36 2MASS J14354857+2013209 QSO 14 35 48.5619484392 +20 13 21.240846408           ~ 3 0
37 2MASS J15283050+3210436 Q? 15 28 30.4901213784 +32 10 43.691494944           ~ 1 0
38 SDSS J153415.25+261859.5 QSO 15 34 15.2586103344 +26 18 59.515349652   22.44 21.34     ~ 8 0
39 SDSS J153538.50+194421.2 Q? 15 35 38.5001010312 +19 44 21.240743604           ~ 1 0
40 7C 153915.00+493306.00 QSO 15 40 43.7324280264 +49 23 23.730712332   21.76 20.96 20.39   ~ 18 1
41 SDSS J154248.89+241328.5 QSO 15 42 48.8930479248 +24 13 28.513557876           ~ 7 0
42 2MASS J15523746+6136438 Sy1 15 52 37.4226593448 +61 36 44.261150472           ~ 12 0
43 2MASS J16055893+4742596 QSO 16 05 58.8615351576 +47 43 00.007634784           ~ 11 0
44 SDSS J160953.39+570500.2 QSO 16 09 53.3892292032 +57 05 00.258289260           ~ 6 0
45 FIRST J162111.0+140602 QSO 16 21 11.0656140744 +14 06 02.359372572           ~ 1 0
46 FIRST J163705.1+483601 rG 16 37 05.104 +48 36 02.48   22.50   20.19   ~ 2 0
47 FIRST J163708.2+091424 QSO 16 37 08.2977857712 +09 14 24.545294844   21.33 20.36     ~ 5 0
48 SDSS J165037.63+212208.5 QSO 16 50 37.6291414752 +21 22 08.572667772           ~ 9 0
49 2MASS J16521396+4435310 QSO 16 52 14.0058587424 +44 35 30.716391300   21.35   19.61   ~ 9 0
50 2MASS J16523845+4428480 QSO 16 52 38.4586575024 +44 28 47.893893744           ~ 8 0
51 2MASS J16575833+3115000 QSO 16 57 58.3318987128 +31 14 59.891803044           ~ 1 0
52 SDSS J170221.33+461113.0 QSO 17 02 21.3298672968 +46 11 13.070851008           ~ 8 0
53 SDSS J170241.19+473716.9 QSO 17 02 41.1991713168 +47 37 16.915692360           ~ 6 0
54 FIRST J170253.5+235757 * 17 02 53.5431918960 +23 57 58.137002928           K5Ve 2 0
55 SDSS J170412.69+300931.5 QSO 17 04 12.6846177504 +30 09 31.540015872           ~ 2 0
56 SDSS J170632.52+275818.4 QSO 17 06 32.5152587808 +27 58 18.396648876           ~ 1 0
57 SDSS J171001.17+384909.9 QSO 17 10 01.1733007680 +38 49 09.979118976           ~ 3 0
58 SDSS J171415.77+255811.6 QSO 17 14 15.7765377456 +25 58 11.585301204           ~ 6 0
59 SDSS J172002.16+245548.8 QSO 17 20 02.1696973464 +24 55 48.933045516   21.46 20.54     ~ 11 0
60 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 837 0

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