2000A&A...360..896L

Query : 2000A&A...360..896L

2000A&A...360..896L - Astronomy and Astrophysics, volume 360896-910 (2000/8-3)

EISily looking for distant clusters of galaxies - a new algorithm and its application to the EIS-wide data.

LOBO C., IOVINO A., LAZZATI D. and CHINCARINI G.

Abstract (from CDS):

We present a new algorithm to search for distant clusters of galaxies on catalogues deriving from imaging data, as those of the ESO Imaging Survey. Our algorithm is a matched filter one, similar to that adopted by Postman et al. (1996AJ....111..615P), aiming at identifying cluster candidates by using positional and photometric data simultaneously. The main novelty of our approach is that spatial and luminosity filter are run separately on the catalogue and no assumption is made on the typical size nor on the typical M* for clusters, as these parameters intervene in our algorithm as typical angular scale σ and typical apparent magnitude m*. Moreover we estimate the background locally for each candidate, allowing us to overcome the hazards of inhomogeneous datasets. As a consequence our algorithm has a lower contamination rate - without loss of completeness - in comparison to other techniques, as tested through extensive simulations. We provide catalogues of galaxy cluster candidates as the result of applying our algorithm to the I-band data of the EIS-wide patches A and B.

Abstract Copyright: ∼

Journal keyword(s): methods: numerical - galaxies: clusters: general - cosmology: large-scale structure of Universe

Nomenclature: Tables 2-5: [LIL2000] JHHMMSS.s+DDMMSS.s N=41+29+21+8.

Simbad objects: 103

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Number of rows : 103
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 [LIL2000] J004445.0-293817.1 ClG 00 44 45.0 -29 38 17           ~ 1 0
2 [LIL2000] J004521.0-292335.5 ClG 00 45 14.4 -29 23 43           ~ 6 0
3 [LIL2000] J004540.5-295054.2 ClG 00 45 40.5 -29 50 54           ~ 2 0
4 [LIL2000] J004544.0-294757.5 ClG 00 45 44.4 -29 48 27           ~ 4 0
5 [LIL2000] J004607.5-295128.7 ClG 00 46 07.4 -29 51 44           ~ 3 0
6 [LIL2000] J004608.1-292340.8 ClG 00 46 08.1 -29 23 41           ~ 3 0
7 [LIL2000] J004633.9-293903.2 ClG 00 46 33.9 -29 39 03           ~ 2 0
8 [LIL2000] J004635.9-292538.8 ClG 00 46 35.9 -29 25 39           ~ 2 0
9 [LIL2000] J004721.9-294316.9 ClG 00 47 21.9 -29 43 17           ~ 2 0
10 [LIL2000] J004722.3-294833.7 ClG 00 47 22.3 -29 48 34           ~ 1 0
11 [LIL2000] J004756.7-292600.1 ClG 00 47 56.7 -29 26 00           ~ 1 0
12 [LIL2000] J004813.5-294444.3 ClG 00 48 13.5 -29 44 44           ~ 1 0
13 [LIL2000] J004818.2-294909.5 ClG 00 48 18.2 -29 49 10           ~ 1 0
14 [LIL2000] J004822.1-294521.4 ClG 00 48 22.1 -29 45 21           ~ 1 0
15 ClG J0048-2942 ClG 00 48 31.6 -29 42 25           ~ 12 0
16 [LIL2000] J004919.0-292245.2 ClG 00 49 19.0 -29 22 45           ~ 1 0
17 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 89 0
18 [LIL2000] J004923.3-294721.4 ClG 00 49 23.3 -29 47 21           ~ 1 0
19 [LIL2000] J004939.5-293433.1 ClG 00 49 39.5 -29 34 33           ~ 1 0
20 [LIL2000] J005004.5-294113.5 ClG 00 50 04.4 -29 41 36           ~ 3 0
21 [LIL2000] J005009.4-292512.4 ClG 00 50 09.4 -29 25 12           ~ 1 0
22 [LIL2000] J005147.6-292920.2 ClG 00 51 47.6 -29 29 20           ~ 1 0
23 [LIL2000] J005149.6-294520.1 ClG 00 51 49.6 -29 45 20           ~ 1 0
24 [LIL2000] J005150.5-293805.3 ClG 00 51 50.5 -29 38 05           ~ 1 0
25 [LIL2000] J005200.5-295058.3 ClG 00 52 00.5 -29 50 58           ~ 1 0
26 [LIL2000] J005243.6-294545.3 ClG 00 52 43.6 -29 45 45           ~ 1 0
27 [LIL2000] J005249.3-292749.5 ClG 00 52 49.5 -29 27 57           ~ 2 0
28 [LIL2000] J005307.1-294740.7 ClG 00 53 07.1 -29 47 41           ~ 1 0
29 [LIL2000] J005338.1-292841.8 ClG 00 53 38.1 -29 28 42           ~ 1 0
30 [LIL2000] J224007.4-395127.2 ClG 16 47.4 -39 51           ~ 1 0
31 [LIL2000] J223544.4-393552.2 ClG 22 35 44.4 -39 35 52           ~ 1 0
32 EDCC 163 ClG 22 36 00 -40 25.4           ~ 4 0
33 [LIL2000] J223601.6-394624.3 ClG 22 36 01.6 -39 46 24           ~ 1 0
34 [LIL2000] J223559.4-393553.8 ClG 22 36 02.9 -39 35 34           ~ 3 0
35 [LIL2000] J223617.9-401739.3 ClG 22 36 18.0 -40 17 55           ~ 4 0
36 [LIL2000] J223655.8-402411.4 ClG 22 36 55.8 -40 24 11           ~ 1 0
37 [LIL2000] J223704.5-395942.4 ClG 22 37 04.5 -39 59 42           ~ 1 0
38 [LIL2000] J223708.5-400022.2 ClG 22 37 11.4 -40 00 16           ~ 3 0
39 EDCC 169 ClG 22 37 38 -39 29.6           ~ 4 0
40 [LIL2000] J223747.2-400614.7 ClG 22 37 47.2 -40 06 15           ~ 1 0
41 [LIL2000] J223803.8-393402.1 ClG 22 38 03.4 -39 34 50           ~ 3 0
42 [LIL2000] J223833.4-400120.8 ClG 22 38 33.8 -40 01 51           ~ 2 0
43 [LIL2000] J223838.7-400003.6 ClG 22 38 38.7 -40 00 04           ~ 1 0
44 [LIL2000] J223841.8-401210.8 ClG 22 38 41.8 -40 12 11           ~ 1 0
45 [LIL2000] J223845.9-395318.7 ClG 22 38 46.4 -39 53 42           ~ 2 0
46 [LIL2000] J223849.3-393416.8 ClG 22 38 49.3 -39 34 17           ~ 1 0
47 [LIL2000] J223855.1-402346.1 ClG 22 38 55.1 -40 23 46           ~ 1 0
48 [LIL2000] J223901.6-394714.7 ClG 22 39 01.6 -39 47 15           ~ 1 0
49 [LIL2000] J223916.7-402013.1 ClG 22 39 16.7 -40 20 13           ~ 1 0
50 [LIL2000] J223934.2-393722.2 ClG 22 39 34.2 -39 37 22           ~ 1 0
51 [LIL2000] J224006.4-402002.1 ClG 22 40 06.4 -40 20 02           ~ 1 0
52 [LIL2000] J224008.5-402101.1 ClG 22 40 07.8 -40 21 08           ~ 4 0
53 [LIL2000] J224016.5-402533.9 ClG 22 40 16.5 -40 25 34           ~ 1 0
54 [LIL2000] J224036.2-393231.6 ClG 22 40 36.2 -39 32 32           ~ 1 0
55 [LIL2000] J224038.5-395727.1 ClG 22 40 38.5 -39 57 27           ~ 1 0
56 [LIL2000] J224051.6-394058.1 ClG 22 40 51.6 -39 40 58           ~ 1 0
57 [LIL2000] J224058.2-400612.5 ClG 22 40 58.2 -40 06 12           ~ 1 0
58 [LIL2000] J224111.2-402122.3 ClG 22 41 11.2 -40 21 22           ~ 1 0
59 [LIL2000] J224116.6-394100.5 ClG 22 41 16.6 -39 41 00           ~ 1 0
60 ACT-CL J2241.2-4000 ClG 22 41 17.0220 -40 00 53.033           ~ 6 0
61 [LIL2000] J224133.7-402058.1 ClG 22 41 33.7 -40 20 58           ~ 1 0
62 [LIL2000] J224141.6-394956.7 ClG 22 41 42.1 -39 49 15           ~ 4 0
63 [LIL2000] J224239.2-394556.4 ClG 22 42 39.2 -39 45 56           ~ 1 0
64 [LIL2000] J224259.8-393221.7 ClG 22 42 59.8 -39 32 22           ~ 1 0
65 [LIL2000] J224304.6-401537.0 ClG 22 43 04.6 -40 15 37           ~ 1 0
66 ACO S 1055 ClG 22 43 16 -39 52.3           ~ 6 0
67 MCG-07-46-008 AG? 22 43 16.14 -39 52 06.7   13.22   12.62 13.3 ~ 43 0
68 [LIL2000] J224317.1-393933.9 ClG 22 43 17.1 -39 39 34           ~ 1 0
69 [LIL2000] J224324.3-402532.8 ClG 22 43 23.8 -40 25 50           ~ 5 0
70 [LIL2000] J224336.1-400042.9 ClG 22 43 36.1 -40 00 43           ~ 1 0
71 [LIL2000] J224342.4-394148.8 ClG 22 43 42.4 -39 41 49           ~ 1 0
72 [LIL2000] J224402.5-400519.5 ClG 22 44 02.5 -40 05 19           ~ 1 0
73 [LIL2000] J224413.6-393705.0 ClG 22 44 13.6 -39 37 05           ~ 1 0
74 [LIL2000] J224419.4-395143.0 ClG 22 44 19.4 -39 51 43           ~ 1 0
75 [LIL2000] J224421.4-400809.2 ClG 22 44 21.4 -40 08 09           ~ 1 0
76 [LIL2000] J224440.4-394529.4 ClG 22 44 40.4 -39 45 29           ~ 1 0
77 [LIL2000] J224453.3-393739.2 ClG 22 44 53.3 -39 37 39           ~ 1 0
78 [LIL2000] J224458.5-402635.9 ClG 22 44 58.5 -40 26 36           ~ 1 0
79 ClG J2245-3954 ClG 22 45 13.2 -39 54 10           ~ 2 0
80 [LIL2000] J224533.1-393952.7 ClG 22 45 33.1 -39 39 53           ~ 1 0
81 [LIL2000] J224534.9-401339.1 ClG 22 45 34.9 -40 13 39           ~ 1 0
82 [LIL2000] J224548.1-393358.1 ClG 22 45 48.1 -39 33 58           ~ 1 0
83 [LIL2000] J224558.5-393104.8 ClG 22 45 58.5 -39 31 05           ~ 1 0
84 [LIL2000] J224558.6-394321.3 ClG 22 45 58.6 -39 43 21           ~ 1 0
85 [LIL2000] J224601.8-395350.0 ClG 22 46 01.8 -39 53 50           ~ 1 0
86 [LIL2000] J224612.4-395314.2 ClG 22 46 12.4 -39 53 14           ~ 1 0
87 [LIL2000] J224626.9-400415.8 ClG 22 46 26.9 -40 04 16           ~ 1 0
88 [LIL2000] J224648.8-401241.9 ClG 22 46 48.8 -40 12 42           ~ 1 0
89 [LIL2000] J224653.0-394103.4 ClG 22 46 53.0 -39 41 03           ~ 1 0
90 [LIL2000] J224743.2-395529.7 ClG 22 47 43.2 -39 55 30           ~ 1 0
91 [LIL2000] J224752.1-400205.6 ClG 22 47 52.1 -40 02 06           ~ 1 0
92 [LIL2000] J224753.2-393546.8 ClG 22 47 53.2 -39 35 47           ~ 1 0
93 [LIL2000] J224754.2-394633.7 ClG 22 47 54.2 -39 46 34           ~ 1 0
94 [LP96] 2245-4002 ClG 22 47 56.6 -39 45 42           ~ 3 0
95 [LIL2000] J224827.9-395048.2 ClG 22 48 28.7 -39 51 25           ~ 2 0
96 [LIL2000] J224855.3-401537.0 ClG 22 48 54.8 -40 15 19           ~ 4 0
97 [LIL2000] J224856.7-393232.3 ClG 22 48 56.7 -39 32 32           ~ 1 0
98 [LIL2000] J224857.6-402244.7 ClG 22 48 57.6 -40 22 45           ~ 1 0
99 [LIL2000] J224904.0-394236.5 ClG 22 49 04.0 -39 42 37           ~ 1 0
100 [LIL2000] J224915.7-393732.6 ClG 22 49 15.7 -39 37 33           ~ 1 0
101 [LIL2000] J224929.2-400527.7 ClG 22 49 29.2 -40 05 28           ~ 1 0
102 ClG J2249-3958 ClG 22 49 33.0 -39 58 10           ~ 4 0
103 [LIL2000] J224932.7-401631.0 ClG 22 49 33.9 -40 16 34           ~ 3 0

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