2002AJ....124.2971M

Query : 2002AJ....124.2971M

2002AJ....124.2971M - Astron. J., 124, 2971-2979 (2002/November-0)

The BTC40 survey for quasars at 4.8<z<6.

MONIER E.M., KENNEFICK J.D., HALL P.B., OSMER P.S., SMITH M.G., DALTON G.B. and GREEN R.F.

Abstract (from CDS):

The BTC40 Survey for high-redshift quasars is a multicolor search using images obtained with the Big Throughput Camera (BTC) on the Cerro Tololo Inter-American Observatory (CTIO) 4 m telescope in V, I, and z filters to search for quasars at redshifts of 4.8<z<6. The survey covers 40 deg2 in B, V, and I, and 36 deg2 in z. Limiting magnitudes (3 σ) reach to V=24.6, I=22.9, and z=22.9. We used the V-I versus I-z two-color diagram to select high-redshift quasar candidates from the objects classified as point sources in the imaging data. Follow-up spectroscopy with the Anglo-Australian Telescope and CTIO 4 m telescopes of candidates having I≤21.5 has yielded two quasars with redshifts of z=4.6 and z=4.8, as well as four emission-line galaxies with z~0.6. Fainter candidates have been identified down to I=22 for future spectroscopy on 8 m class telescopes.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Quasars: General - Surveys

Nomenclature: Table 2: BTC40 JHHMM+DDMM N=40.

CDS comments: Table 4, object 3 = BTC40 J0001-4024 not 4025. Table 4, col(1): numbering NN not in SIMBAD.

Simbad objects: 40

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Number of rows : 40
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 BTC40 J0001-4025 Q? 00 01 20.6 -40 25 16           ~ 1 0
2 BTC40 J0001-4023 Q? 00 01 34.3 -40 23 21           ~ 1 0
3 BTC40 J0001-4024 Q? 00 01 50.5 -40 24 25           ~ 1 0
4 BTC40 J0002-4019 Q? 00 02 14.8 -40 19 52           ~ 1 0
5 BTC40 J0223+0028 Q? 02 23 07.7 +00 28 09           ~ 1 0
6 BTC40 J0229+0023 Q? 02 29 58.7 +00 23 05           ~ 1 0
7 BTC40 J0233-0008 Q? 02 33 42.2 -00 08 20           ~ 1 0
8 BTC40 J0528-2711 Q? 05 28 47.4 -27 11 30           ~ 1 0
9 BTC40 J0529-2854 * 05 29 56.1 -28 54 48           ~ 1 0
10 BTC40 J0537-2851 * 05 37 55.8 -28 51 01           ~ 1 0
11 BTC40 J0544-2858 * 05 44 25.7 -28 58 28           ~ 1 0
12 BTC40 J0948+0637 Q? 09 48 43.9 +06 37 55           ~ 1 0
13 BTC40 J0949+0715 EmG 09 49 02.6 +07 15 10           ~ 1 0
14 BTC40 J0958+0733 * 09 58 59.5 +07 33 57           ~ 1 0
15 BTC40 J1202-2014 * 12 02 44.6 -20 14 02           M 1 0
16 BTC40 J1205-1918 Q? 12 05 02.9 -19 18 09           ~ 1 0
17 BTC40 J1207-1916 Q? 12 07 47.7 -19 16 39           ~ 1 0
18 BTC40 J1213-2022 * 12 13 14.8 -20 22 28           M 1 0
19 BTC40 J1216-1913 * 12 16 18.3 -19 13 05           ~ 1 0
20 BTC40 J1216-1934 Q? 12 16 27.2 -19 34 48           ~ 1 0
21 BTC40 J1423+0046 Q? 14 23 28.5 +00 46 02           ~ 1 0
22 BTC40 J1428+0119 Q? 14 28 49.8 +01 19 33           ~ 1 0
23 [VV2006] J142926.5+011954 QSO 14 29 26.4254653128 +01 19 53.572666764   24.55 22.53     ~ 6 0
24 BTC40 J1429+0108 Q? 14 29 45.7 +01 08 55           ~ 1 0
25 BTC40 J1429+0034 * 14 29 57.2 +00 34 32           ~ 1 0
26 BTC40 J1430+0028 Q? 14 30 09.7 +00 28 11           ~ 1 0
27 BTC40 J1430+0107 EmG 14 30 10.9 +01 07 22           ~ 1 0
28 BTC40 J1434+0033 Q? 14 34 36.3 +00 33 13           ~ 1 0
29 BTC40 J1435+0106 EmG 14 35 42.7 +01 06 47           ~ 1 0
30 BTC40 J1438+0043 Q? 14 38 24.8 +00 43 23           ~ 1 0
31 [VV2006] J234025.7-394932 QSO 23 40 25.7323703016 -39 49 31.594624392     19.40     ~ 4 0
32 BTC40 J2345-3948 Q? 23 45 27.5 -39 48 42           ~ 1 0
33 BTC40 J2348-4018 Q? 23 48 55.4 -40 18 36           ~ 1 0
34 BTC40 J2350-4020 Q? 23 50 06.6 -40 20 49           ~ 1 0
35 BTC40 J2354-4044 Q? 23 54 55.2 -40 44 19           ~ 1 0
36 BTC40 J2356-3949 * 23 56 06.9 -39 49 57           ~ 1 0
37 BTC40 J2357-3944 Q? 23 57 10.1 -39 44 15           ~ 1 0
38 BTC40 J2358-3951 * 23 58 23.2 -39 51 04           ~ 1 0
39 BTC40 J2358-3950 Q? 23 58 31.3 -39 50 55           ~ 1 0
40 BTC40 J2358-4022 Q? 23 58 52.3 -40 22 34           ~ 1 0

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