1998A&A...331...41L

Query : 1998A&A...331...41L

1998A&A...331...41L - Astronomy and Astrophysics, volume 33141-51 (1998/3-1)

Search and analysis of small scale structures in two X-ray clusters of galaxies.

LAZZATI D., CAMPANA S., ROSATI P., CHINCARINI G. and GIACCONI R.

Abstract (from CDS):

We present a refinement of the wavelet analysis technique for the detection and characterisation of small scale features embedded in a strongly varying background. This technique handles with particular care the side effects of non-orthogonality in the wavelet space which can cause spurious detections and lead to a biased estimate of source parameters. This novel technique is applied to two ROSAT PSPC pointed observations of nearby clusters of galaxies, A 1367 and A 194. We find evidence that the case of A 1367 is not unique and that galaxy-scale X-ray emission could be a quite common property of clusters of galaxies. We detect 28 sources in the field of A 1367 and 26 in the field of A 194. Since these numbers are significantly larger than those expected from the logN - logS relation in the field, most of the sources are expected to be associated with the cluster itself and indeed several identifications with galaxies are possible. In addition, CCD observations have revealed that two X-ray sources in the field of A 194, classified as extended by the multi-scale analysis, are very likely associated with two background galaxy clusters at intermediate redshift.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: A 194, A 1367 - X-rays: galaxies - methods: data analysis

Nomenclature: Table 2: [LCR98] A 1367 NN (Nos 1-28). Table 3: [LCR98] A 194 NN (Nos 1-26).

CDS comments: Table 2, cross-id: P = [BFG83] pNN, E = [BFG83] eNN, last col.: 'NN' = [BFG83] galaxy NN, G = [GFJ95] rNN

Simbad objects: 56

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Number of rows : 56
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 [LCR98] A 194 10 X 01 23 52.8 -01 17 50           ~ 1 0
2 [LCR98] A 194 20 X 01 24 17.6 -01 14 46           ~ 1 0
3 [LCR98] A 194 22 X 01 24 20.1 -01 02 27           ~ 1 0
4 [LCR98] A 194 17 X 01 24 30.1 -01 26 47           ~ 1 0
5 [LCR98] A 194 24 X 01 24 44.3 -00 52 37           ~ 1 0
6 [LCR98] A 194 15 X 01 24 49.8 -01 23 40           ~ 1 0
7 [LCR98] A 194 16 X 01 24 57.5 -01 17 37           ~ 1 0
8 [LCR98] A 194 25 X 01 25 08.2 -00 52 59           ~ 1 0
9 [LCR98] A 194 14 X 01 25 09.2 -01 35 33           ~ 1 0
10 SDSS J012515.30-010511.3 QSO 01 25 15.3024176832 -01 05 11.421508344           ~ 9 0
11 [LCR98] A 194 26 X 01 25 16.1 -01 31 30           ~ 2 0
12 [LCR98] A 194 11 X 01 25 30.0 -01 37 28           ~ 1 0
13 2MASX J01253596-0125451 GiC 01 25 35.96973 -01 25 45.1920           ~ 5 0
14 [LCR98] A 194 13 X 01 25 41.8 -01 44 25           ~ 1 0
15 NGC 541 AGN 01 25 44.3069825040 -01 22 46.086331044 13.42 13.03 12.08     ~ 219 2
16 SDSS J012555.40-011117.9 QSO 01 25 55.4105326584 -01 11 17.946699360           ~ 12 0
17 NGC 547 rG 01 26 00.6208982520 -01 20 42.432452268   13.16 13.34     ~ 363 4
18 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 363 2
19 [LCR98] A 194 7 X 01 26 11.4 -01 12 05           ~ 1 0
20 [LCR98] A 194 8 X 01 26 22.4 -01 38 13           ~ 1 0
21 [LCR98] A 194 23 X 01 26 30.3 -01 53 44           ~ 1 0
22 TYC 4682-1697-1 * 01 26 42.1367679528 -01 14 07.548971676   11.44 11.03     ~ 2 0
23 [LCR98] A 194 6 X 01 27 00.9 -01 30 09           ~ 1 0
24 NVSS J012710-015154 BLL 01 27 11.0782895688 -01 51 53.672775516       17.9   ~ 9 0
25 1RXS J012724.9-014419 X 01 27 24.9 -01 44 19           ~ 1 0
26 [LCR98] A 194 21 X 01 27 27.6 -01 03 57           ~ 1 0
27 [LCR98] A 194 18 X 01 27 45.8 -01 52 59           ~ 1 0
28 [LCR98] A 1367 24 X 11 42 44.3 +19 37 49           ~ 1 0
29 [LCR98] A 1367 19 X 11 42 52.7 +19 40 18           ~ 1 0
30 [LCR98] A 1367 4 X 11 42 56.0 +20 00 38           ~ 1 0
31 RX J1143.4+1935 X 11 43 29 +19 35.6           ~ 2 0
32 RX J1143.5+1940 X 11 43 31 +19 40.8           ~ 2 0
33 [BFG83] e10 X 11 43 43.9 +20 05 33           ~ 3 0
34 Z 97-87 GiC 11 43 49.1088652488 +19 58 05.954438316 13.96 14.35 13.59 13.29   ~ 237 3
35 QSO B1141+2013 QSO 11 43 56.8921061640 +19 56 49.357262148     18.5     ~ 32 0
36 RX J1143.9+1953 X 11 43 57.2 +19 53 51           ~ 3 1
37 RX J1144.0+1933 PM* 11 44 00.7210498082 +19 32 57.303287828       16.043   M2 4 0
38 RX J1144.1+1950 X 11 44 09 +19 50.5           ~ 5 0
39 [LCR98] A 1367 20 X 11 44 16.1 +19 59 07           ~ 1 0
40 RX J1144.6+1951 X 11 44 36 +19 51.7           ~ 5 0
41 [LCR98] A 1367 18 X 11 44 40.6 +19 18 32           ~ 1 0
42 RX J1144.6+1943 X 11 44 41 +19 43.1           ~ 3 0
43 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
44 NGC 3860 AGN 11 44 49.1676137928 +19 47 42.121734972 14.81 14.61   13.12   ~ 118 0
45 [LCR98] A 1367 23 X 11 44 59.8 +20 10 54           ~ 1 0
46 1RXS J114501.9+191302 X 11 45 01.9 +19 13 02           ~ 1 0
47 NGC 3861 Sy2 11 45 03.8789303016 +19 58 25.155429204 13.65 13.47 12.67 12.43   ~ 160 2
48 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 646 1
49 SDSS J114515.70+195725.2 QSO 11 45 15.6982006896 +19 57 25.186172184           ~ 10 0
50 RX J1145.2+1950 X 11 45 16.9 +19 50 10           ~ 3 0
51 [LCR98] A 1367 17 X 11 45 30.7 +19 16 41           ~ 1 0
52 RX J1145.6+1953 X 11 45 40 +19 53.5           ~ 2 0
53 RX J1145.7+1946 X 11 45 47.9 +19 46 32           ~ 2 0
54 [LCR98] A 1367 27 X 11 45 59.7 +19 39 52           ~ 1 0
55 [LCR98] A 1367 22 X 11 46 20.6 +19 19 02           ~ 1 0
56 [LCR98] A 1367 3 X 11 46 24.0 +19 48 28           ~ 1 0

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