2014A&A...567A..89T


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST13:23:29

2014A&A...567A..89T - Astronomy and Astrophysics, volume 567A, 89-89 (2014/7-1)

The Swift X-ray Telescope Cluster Survey. II. X-ray spectral analysis.

TOZZI P., MORETTI A., TUNDO E., LIU T., ROSATI P., BORGANI S., TAGLIAFERRI G., CAMPANA S., FUGAZZA D. and D'AVANZO P.

Abstract (from CDS):

We present a spectral analysis of a new, flux-limited sample of 72 X-ray selected clusters of galaxies identified with the X-ray Telescope (XRT) on board the Swift satellite down to a flux limit of ∼10–14erg/s/cm2 (SWXCS). We carry out a detailed X-ray spectral analysis with the twofold aim of measuring redshifts and characterizing the properties of the intracluster medium (ICM) for the majority of the SWXCS sources. Optical counterparts and spectroscopic or photometric redshifts for some of the sources are obtained with a cross-correlation with the NASA/IPAC Extragalactic Database. Additional photometric redshifts are computed with a dedicated follow-up program with the Telescopio Nazionale Galileo and a cross-correlation with the SDSS. In addition, we also blindly search for the Hydrogen-like and He-like iron Kα emission line complex in the X-ray spectrum. We detect the iron emission lines in 35% of the sample, and hence obtain a robust measure of the X-ray redshift zX with typical rms error 1-5%. We use zX whenever the optical redshift is not available. Finally, for all the sources with measured redshift, background-subtracted spectra are fitted with a single-temperature mekal model to measure global temperature, X-ray luminosity and iron abundance of the ICM. We perform extensive spectral simulations to accounts for fitting bias, and to assess the robustness of our results. We derive a criterion to select reliable best-fit models and an empirical formula to account for fitting bias. The bias-corrected values are then used to investigate the scaling properties of the X-ray observables. Overall, we are able to characterize the ICM of 46 sources with redshifts (64% of the sample). The sample is mostly constituted by clusters with temperatures between 3 and 10keV, plus 14 low-mass clusters and groups with temperatures below 3keV. The redshift distribution peaks around z∼0.25 and extends up to z∼1, with 60% of the sample at 0.1<z<0.4. We derive the luminosity-temperature relation for these 46 sources, finding good agreement with previous studies. Thanks to the good X-ray spectral quality and the low background of Swift/XRT, we are able to measure ICM temperatures and X-ray luminosities for the 46 sources with redshifts. Once redshifts are available for the remaining 26 sources, this sample will constitute a well-characterized, flux-limited catalog of clusters distributed over a broad redshift range (0.1≤z ≤1.0) providing a statistically complete view of the cluster population with a selection function that allows a proper treatment of any measurement bias. The quality of the SWXCS sample is comparable to other samples available in the literature and obtained with much larger X-ray telescopes. Our results have interesting implications for the design of future X-ray survey telescopes, characterized by good-quality PSF over the entire field of view and low background.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: high-redshift - cosmology: observations - X-rays: galaxies: clusters - intergalactic medium

VizieR on-line data: <Available at CDS (J/A+A/567/A89): table1.dat table2.dat>

Simbad objects: 74

goto Full paper

goto View the reference in ADS

Number of rows : 74

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 SWXCS J000315-5255.2 ClG 00 03 15.97 -52 55 10.9           ~ 3 0
2 SWXCS J000324-5253.8 ClG 00 03 24.01 -52 53 50.7           ~ 3 0
3 SWXCS J000345-5301.8 ClG 00 03 45.10 -53 01 49.0           ~ 3 0
4 SWXCS J002437-5803.9 ClG 00 24 37.80 -58 03 53.1           ~ 3 0
5 SWXCS J003316+1939.4 ClG 00 33 16.65 +19 39 22.9           ~ 3 0
6 SWXCS J005500-3852.4 ClG 00 55 00.48 -38 52 26.8           ~ 9 0
7 SWXCS J011432-4828.4 ClG 01 14 32.96 -48 28 24.3           ~ 3 0
8 SWXCS J012210-1304.4 ClG 01 22 10.91 -13 04 22.9           ~ 3 0
9 SWXCS J012302+3756.3 ClG 01 23 02.81 +37 56 15.7           ~ 3 0
10 [DGK2015] SWCL J015752.9+165933 ClG 01 57 53.08 +16 59 33.7           ~ 6 0
11 SWXCS J020744+0020.9 ClG 02 07 44.84 +00 20 55.4           ~ 3 0
12 SWXCS J021705-5014.2 ClG 02 17 05.06 -50 14 09.7           ~ 4 0
13 SWXCS J021747-5003.4 ClG 02 17 47.57 -50 03 22.7           ~ 3 0
14 SWXCS J022344+3823.2 ClG 02 23 44.51 +38 23 11.3           ~ 3 0
15 SWXCS J022546-1855.9 ClG 02 25 46.08 -18 55 53.0           ~ 3 0
16 SWXCS J023224-7120.3 ClG 02 32 24.72 -71 20 20.1           ~ 3 0
17 SWXCS J023302-7116.6 ClG 02 33 02.74 -71 16 34.2           ~ 3 0
18 SWXCS J023924-2505.1 ClG 02 39 24.13 -25 05 04.0           ~ 3 0
19 SWXCS J024010-2511.3 ClG 02 40 10.08 -25 11 21.2           ~ 3 0
20 SWXCS J035259-0043.7 ClG 03 52 59.58 -00 43 42.5           ~ 5 0
21 SWXCS J035310+2133.6 ClG 03 53 10.98 +21 33 35.2           ~ 3 0
22 SWXCS J044144-1115.6 ClG 04 41 44.98 -11 15 36.8           ~ 3 0
23 SWXCS J062155-6228.6 ClG 06 21 55.66 -62 28 34.5           ~ 3 0
24 SWXCS J082113+3200.1 ClG 08 21 13.12 +32 00 04.7           ~ 3 0
25 SWXCS J083340+3311.0 ClG 08 33 40.36 +33 11 02.3           ~ 3 0
26 SWXCS J084749+133141 ClG 08 47 49.32 +13 31 40.4           ~ 6 0
27 SWXCS J085524+1102.0 ClG 08 55 24.53 +11 02 01.8           ~ 3 0
28 SWXCS J090946+4157.2 ClG 09 09 46.16 +41 57 13.9           ~ 3 0
29 SWXCS J092619-0905.8 ClG 09 26 19.16 -09 05 46.8           ~ 3 0
30 SWXCS J092650+3013.8 ClG 09 26 50.07 +30 13 45.1           ~ 5 0
31 SWXCS J092719+3013.7 ClG 09 27 19.49 +30 13 42.4           ~ 5 0
32 SWXCS J092729+3010.8 ClG 09 27 29.76 +30 10 48.0           ~ 5 0
33 SWXCS J093045+1659.5 ClG 09 30 45.24 +16 59 31.4           ~ 5 0
34 GMBCG 144.45579+15.59434 ClG 09 37 49.23 +15 35 40.1           ~ 4 0
35 SWXCS J094816-1316.7 ClG 09 48 16.99 -13 16 44.9           ~ 3 0
36 SWXCS J101341+4306.9 ClG 10 13 41.58 +43 06 55.3           ~ 5 0
37 SWXCS J105946+5348.2 ClG 10 59 46.18 +53 48 09.5           ~ 5 0
38 SWXCS J115811+4529.1 ClG 11 58 11.36 +45 29 06.8           ~ 5 0
39 ZwCl 1234+2916 ClG 12 36 10.24 +28 59 00.9           ~ 23 1
40 SWXCS J124312+1704.9 ClG 12 43 12.69 +17 04 51.8           ~ 6 0
41 SWXCS J131300+0803.0 ClG 13 13 00.29 +08 02 59.4           ~ 4 0
42 SWXCS J131522+1641.8 ClG 13 15 22.39 +16 41 45.5           ~ 3 0
43 SWXCS J133051+4206.8 ClG 13 30 51.61 +42 06 48.0           ~ 5 0
44 SWXCS J133055+4200.3 ClG 13 30 55.32 +42 00 17.1           ~ 5 0
45 SWXCS J140637+2743.8 ClG 14 06 37.28 +27 43 49.1           ~ 5 0
46 [AM2011] 39 ClG 14 06 39.35 +27 35 59.2           ~ 6 0
47 ACO 1861 ClG 14 07 28.03 +27 49 17.8           ~ 27 0
48 [SPD2011] 27815 ClG 14 36 46.38 +27 51 57.2           ~ 4 0
49 SWXCS J151324+3057.6 ClG 15 13 24.40 +30 57 38.4           ~ 3 0
50 ACO 2141 ClG 15 57 46 +35 27.5           ~ 36 0
51 SWXCS J164956+3130.3 ClG 16 49 56.71 +31 30 21.5           ~ 5 0
52 SWXCS J173721+4618.6 ClG 17 37 21.21 +46 18 34.0           ~ 3 0
53 SWXCS J173932+2720.9 ClG 17 39 32.43 +27 20 55.4           ~ 3 0
54 SWXCS J175640+3329.5 ClG 17 56 40.56 +33 29 28.7           ~ 3 0
55 SWXCS J181053+5815.5 ClG 18 10 53.56 +58 15 27.5           ~ 3 0
56 SWXCS J194004+7824.3 ClG 19 40 04.10 +78 24 19.9           ~ 3 0
57 SWXCS J203723-4401.7 ClG 20 37 23.91 -44 01 41.3           ~ 3 0
58 GRB 050509 gB 20 42 19.86 +54 04 16.3           ~ 13 0
59 SWXCS J215354+1653.8 ClG 21 53 54.03 +16 53 48.4           ~ 3 0
60 SWXCS J215507+1647.4 ClG 21 55 07.74 +16 47 25.0           ~ 3 0
61 [DGK2015] SWCL J222438.0-022231 ClG 22 24 37.77 -02 22 31.0           ~ 6 0
62 SWXCS J222443-0220.5 ClG 22 24 43.89 -02 20 31.8           ~ 5 0
63 SWXCS J222516-0208.5 ClG 22 25 16.51 -02 08 27.6           ~ 5 0
64 ACO 3875 ClG 22 26 00.9 -57 13 04           ~ 8 0
65 SWXCS J222917-1101.1 ClG 22 29 17.64 -11 01 06.6           ~ 3 0
66 [DGK2015] SWCL J222954.1+194350 ClG 22 29 53.54 +19 43 54.9           ~ 6 0
67 SWXCS J224207+2333.9 ClG 22 42 07.35 +23 33 54.1           ~ 3 0
68 SWXCS J230650-6804.0 ClG 23 06 50.74 -68 04 01.0           ~ 3 0
69 SWXCS J230754-6815.1 ClG 23 07 54.65 -68 15 06.0           ~ 3 0
70 [DGK2015] SWCL J232248.4+054810 ClG 23 22 48.46 +05 48 09.5           ~ 6 0
71 SWXCS J232345-3130.8 ClG 23 23 45.42 -31 30 48.5           ~ 3 0
72 GRB 051001 gB 23 23 48.580 -31 31 25.70           ~ 64 0
73 ACO 4017 ClG 23 35 18.64 -66 21 39.8           ~ 4 0
74 ACO S 1136 ClG 23 36 14.3 -31 36 24           ~ 22 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2014A&A...567A..89T and select 'bookmark this link' or equivalent in the popup menu


2019.10.23-13:23:29

© Université de Strasbourg/CNRS

    • Contact