2012AJ....144..191W

Query : 2012AJ....144..191W

2012AJ....144..191W - Astron. J., 144, 191 (2012/December-0)

Age and mass studies for young star clusters in M31 from SEDS-FIT.

WANG S., MA J., FAN Z., WU Z., ZHANG T., ZOU H. and ZHOU X.

Abstract (from CDS):

In this paper, we present photometry for young star clusters in M31, which are selected from Caldwell et al. These star clusters have been observed as part of the Beijing-Arizona-Taiwan-Connecticut (BATC) Multicolor Sky Survey from 1995 February to 2008 March. The BATC images including these star clusters are taken with 15 intermediate-band filters covering 3000-10000 Å. Combined with photometry in the GALEX far- and near-ultraviolet, broadband UBV RI, SDSS ugriz, and infrared JHKs of Two Micron All Sky Survey, we obtain their accurate spectral energy distributions (SEDs) from 1538 to 20000 Å. We derive these star clusters' ages and masses by comparing their SEDs with stellar population synthesis models. Our results are in good agreement with previous determinations. The mean value of age and mass of young clusters (<2 Gyr) is about 385 Myr and 2x104 M☉, respectively. There are two distinct peaks in the age distribution, a highest peak at age ∼60 Myr and a secondary peak around 250 Myr, while the mass distribution shows a single peak around 104 M☉. A few young star clusters have two-body relaxation times greater than their ages, indicating that those clusters have not been well dynamically relaxed and therefore have not established the thermal equilibrium. There are several regions showing aggregations of young star clusters around the 10 kpc ring and the outer ring, indicating that the distribution of the young star clusters is well correlated with M31's star-forming regions. The young massive star clusters (age ≤ 100 Myr and mass ≥ 104 M☉) show apparent concentration around the ring splitting region, suggesting a recent passage of a satellite galaxy (M32) through M31 disk.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: M31 - galaxies: star clusters: general - galaxies: stellar content

VizieR on-line data: <Available at CDS (J/AJ/144/191): table1.dat table2.dat table3.dat>

CDS comments: DAO NN = [CCS85] NN in Simbad; M NNN = [MKK98] M 31 NN; V NNN = [V62] NNN; B NNN = Bol NNN; NB NN = NBol NN.

Simbad objects: 155

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Number of rows : 155
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 Bol 303 GlC 00 38 50.5915468083 +40 27 30.870969069 18.411 18.325 17.890 17.634 17.274 ~ 26 1
2 Bol 305 GlC 00 38 58.85 +40 16 32.1 18.781 18.546 17.770 17.299 16.717 ~ 27 1
3 Bol 307 GlC 00 39 18.4515568560 +40 32 57.907004532 18.408 18.178 17.428 16.926 16.274 ~ 34 0
4 Bol 436 GlC 00 39 30.6421131432 +40 18 20.446330248 19.514 19.092 18.224 17.632 16.999 ~ 15 0
5 Bol 314 GlC 00 39 44.59 +40 14 07.9 18.456 18.341 17.770 17.405 16.942 ~ 31 1
6 Bol 315 GlC 00 39 48.570 +40 31 30.45 16.304 16.581 16.090 15.755 15.298 ~ 54 1
7 M31GC J003951+401815 GlC 00 39 50.79 +40 18 14.7 19.156 18.935 18.187 17.694 17.090 ~ 19 1
8 Bol 316 GlC 00 39 53.59 +40 41 39.0 17.695 17.553 16.710 16.205 15.668 ~ 30 1
9 Bol 318 GlC 00 40 00.86 +40 34 08.0 16.845 17.236 16.915 16.751 16.472 ~ 37 1
10 Bol 319 GlC 00 40 02.9978476176 +40 33 57.931244604 17.453 17.775 17.379 17.123 16.705 ~ 42 1
11 [NVK2008] KW004 GlC 00 40 10.9793917608 +40 36 11.469495060 18.010 18.392 18.092 17.917 17.648 ~ 14 1
12 Bol 321 GlC 00 40 15.38 +40 27 45.9 17.913 18.068 17.615 17.316 16.834 ~ 29 1
13 Bol D189 GlC 00 40 15.4761973536 +40 39 59.320200888 18.241 18.554 18.168 17.927 17.577 ~ 26 1
14 Bol 322 GlC 00 40 17.266 +40 39 04.95 17.589 18.032 17.789 17.657 17.394 ~ 34 1
15 Bol 323 GlC 00 40 18.267 +40 32 44.62 18.400 18.351 17.844 17.542 17.181 ~ 22 1
16 Bol 442 GlC 00 40 19.420 +40 37 29.30 18.290 18.479 18.000 17.657 17.220 ~ 20 1
17 Bol 443 GlC 00 40 20.782 +40 33 21.94 18.48 19.00 18.20 18.20 17.79 ~ 22 1
18 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
19 Bol 327 GlC 00 40 24.101 +40 36 22.64 16.55 16.90 16.58 16.31 16.00 ~ 47 1
20 NAME VDB0 Cl* 00 40 29.385 +40 36 15.20 14.957 14.94 15.288 15.056 14.701 ~ 45 2
21 Bol D196 GlC 00 40 34.80 +40 26 37.3 17.64 18.58 19.18 18.07   ~ 12 1
22 Bol 448 GlC 00 40 36.5318597808 +40 40 15.112189848 18.311 18.316 17.49 17.207 16.688 ~ 38 1
23 M31GC J004037+403321 GlC 00 40 37.1397865104 +40 33 21.589533360 20.965 20.503 19.848 19.372 18.750 ~ 12 1
24 Bol D6 GlC 00 40 37.3651913280 +40 48 45.279686556 18.882 19.043 18.672 18.455 18.088 ~ 26 1
25 Bol 335 GlC 00 40 41.685 +40 38 28.16 19.615 19.011 17.824 17.001 16.158 ~ 43 0
26 Bol 449 GlC 00 40 42.269 +40 36 04.72 19.313 19.138 18.330 17.825 17.265 ~ 24 0
27 M31GC J004045+405308 GlC 00 40 44.8886786760 +40 53 08.133987660 20.299 20.007 19.321 18.870 18.248 ~ 13 1
28 [NVK2008] KW125 GlC 00 40 46.997 +40 40 58.08 19.872 19.663 18.843 18.294 17.722 ~ 18 0
29 BA 1-447 GlC 00 40 47.77 +40 55 34.7 19.922 21.15 19.13 18.28 19.189 ~ 17 1
30 KWC 27 Gl? 00 40 48.355 +40 51 58.42 18.127 18.497 18.152 17.869 17.396 ~ 13 1
31 Bol 452 GlC 00 40 48.355 +40 35 06.16 18.054 18.245 17.840 17.579 17.206 ~ 22 2
32 Bol 18 GlC 00 40 49.4097068976 +40 41 31.810817544 18.614 18.372 17.517 16.961 16.351 ~ 44 0
33 M31GC J004051+404039 Gl? 00 40 50.828 +40 40 38.53 21.490 20.860 19.923 19.219 18.497 ~ 16 0
34 Bol D10 GlC 00 40 51.0567617928 +41 15 04.991350932 19.740 19.476 18.785 18.354 17.809 ~ 10 1
35 Bol D12 GlC 00 40 52.2805374024 +40 58 41.312939376 19.805 19.588 18.919 18.479 17.913 ~ 27 1
36 [NVK2008] KW147 GlC 00 40 52.947 +40 35 19.59 20.036 19.40 19.04 18.303 17.613 ~ 17 1
37 [KLG2007] GC1 18 GlC 00 40 53.6352460512 +41 16 14.838590712 20.424 20.255 19.479 18.843 18.117 ~ 8 1
38 KHM31 77 GlC 00 40 53.7042545400 +40 36 50.699280060 20.999 20.567 19.775 19.131 18.449 ~ 9 0
39 [NVK2008] KW160 GlC 00 40 56.646 +40 34 25.34 19.692   19.62 19.216 18.906 ~ 8 1
40 [NVK2008] KW170 GlC 00 40 58.809 +40 34 24.43 19.490 19.615 19.295 19.018 18.574 ~ 9 1
41 Bol D14 GlC 00 41 01.0475141352 +41 06 32.665618548 19.480 19.439 18.745 18.257 17.616 ~ 13 1
42 Bol 247 GlC 00 41 02.22 +41 00 31.5 18.854 18.480 17.589 17.005 16.412 ~ 15 0
43 [NVK2008] KW179 GlC 00 41 02.6522914680 +40 34 43.502371932 19.619   19.72 19.402 19.016 ~ 7 1
44 Bol D15 GlC 00 41 02.7201457704 +41 06 36.344037204 19.463 19.336 18.588 18.077 17.502 ~ 26 1
45 Bol 453 GlC 00 41 03.31 +41 00 55.4 18.33 18.17 17.30 16.76 16.04 ~ 18 1
46 Bol D200 GlC 00 41 06.8467815360 +40 34 28.854767424 18.794 19.003 18.650 18.384 18.012 ~ 18 1
47 Bol D17 GlC 00 41 09.986 +40 58 11.33 19.372 19.130 18.388 17.908 17.352 ~ 17 0
48 M31GC J004112+410532 GlC 00 41 12.24 +41 05 28.8 19.022 18.776 18.149 17.692 16.947 ~ 28 1
49 KWC 39 GlC 00 41 12.7758716360 +40 34 17.989937986 17.599 17.819 17.431 17.158 16.710 ~ 24 1
50 [NVK2008] KW210 GlC 00 41 13.7971466472 +40 33 58.111283124 17.578 17.762 17.359 17.085 16.743 ~ 24 1
51 Bol D19 GlC 00 41 16.1478726768 +41 05 07.476169488 20.426 20.052 19.119 18.473 17.673 ~ 13 0
52 Bol 342 GlC 00 41 24.084 +40 36 47.01 17.939 18.205 17.881 17.691 17.442 ~ 44 1
53 [NVK2008] KW245 GlC 00 41 29.473 +40 45 16.88 19.676 19.521 19.050 18.671 18.025 ~ 24 1
54 NAME [G2012b] C9 GlC 00 41 31.1704717008 +40 46 12.418515768 19.516 19.400 18.986 18.752 18.409 ~ 9 1
55 NAME [G2012b] C037 G 00 41 36.80 +40 47 24.4   18.120       ~ 23 1
56 Bol 40 GlC 00 41 38.8429994184 +40 40 54.332136804 17.568 17.748 17.339 17.042 16.625 ~ 44 1
57 LGGS J004139.49+404033.4 Gl? 00 41 39.48 +40 40 33.3 19.362 19.81 19.191 18.818 18.278 A 9 1
58 Bol D206 GlC 00 41 40.6157367888 +40 50 06.620489592 19.503 19.314 18.792 18.493 18.137 ~ 21 1
59 Bol 521 GlC 00 41 41.73 +40 52 01.6 19.834 19.720 19.059 18.642 18.108 ~ 13 1
60 Bol 43 GlC 00 41 42.3000929016 +40 42 39.975886908 17.146 17.359 17.002 16.766 16.443 ~ 38 1
61 Bol 458 GlC 00 41 44.63 +40 51 22.6 18.808 18.632 18.104 17.774 17.340 ~ 25 1
62 Bol 49 GlC 00 41 45.57 +40 49 55.0 18.519 18.284 17.724 17.354 16.874 ~ 39 1
63 NAME SK036A GlC 00 41 47.38 +40 51 08.2 21.411 20.920 19.869 19.187 18.497 ~ 7 0
64 Bol D35 GlC 00 41 50.3940941472 +41 20 03.691959432 19.384 19.126 18.511 18.122 17.717 ~ 10 0
65 KHM31 341 Gl? 00 41 53.04 +40 52 35.6 20.092 19.895 19.330 18.946 18.393 A 7 1
66 KHM31 345 GlC 00 41 53.85 +40 50 09.4 20.719 20.658 20.277 20.187 20.189 ~ 6 1
67 KHM31 152 GlC 00 41 56.8368340464 +40 46 32.697753204     19.56   19.43 ~ 6 1
68 Bol 255 GlC 00 42 00.0159298632 +40 48 33.959094228 18.955 18.729 18.164 17.747 17.163 ~ 14 1
69 Bol 66 GlC 00 42 03.09 +40 44 47.1 17.715 18.047 17.793 17.662 17.465 ~ 37 1
70 Bol 69 GlC 00 42 05.51 +41 26 09.4 18.988 18.794 18.273 17.966 17.685 ~ 30 1
71 Bol 259 GlC 00 42 18.9485801784 +41 42 14.849909748     18.36   17.33 ~ 11 0
72 Bol 91 GlC 00 42 21.7125298224 +41 22 05.354293692 18.459 18.360 17.912 17.651 17.363 ~ 34 2
73 Bol 349 GlC 00 42 24.1266945648 +40 37 43.736505060 19.183 18.961 18.225 17.724 17.113 ~ 16 0
74 ACH 13 * 00 42 34.1355338712 +41 19 46.591060836 16.481 16.463 15.850 15.556 15.345 ~ 21 0
75 Bol D67 GlC 00 42 38.9848318728 +41 36 43.045628976 19.986 19.782 19.11     ~ 12 0
76 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
77 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
78 Bol 133 GlC 00 42 51.60 +41 23 29.7 17.472 18.049 17.694 17.317 16.712 ~ 22 1
79 Bol D81 GlC 00 42 55.19 +41 03 07.4     18.27     ~ 10 1
80 Bol D89 GlC 00 43 01.3306204344 +41 26 23.927390592 19.891 19.653 19.067 18.763 18.445 ~ 18 1
81 Bol 145 GlC 00 43 01.58 +41 12 26.9 19.61 19.148 18.278 17.761 17.341 ~ 31 0
82 Bol D95 GlC 00 43 14.0512630152 +41 08 44.643512796 19.834 19.623 19.062 18.589 17.800 A 11 1
83 Bol D97 GlC 00 43 16.74 +41 06 33.4 19.649 19.254 18.410 17.830 17.145 ~ 15 1
84 Bol D98 GlC 00 43 17.3495822184 +41 31 29.528747760 19.066 19.057 18.757 18.514 18.072 ~ 16 1
85 Bol 271 GlC 00 43 23.09 +41 25 26.2 19.744 19.420 18.463 17.858 17.394 ~ 17 0
86 NAME SK068A Gl? 00 43 28.1541400104 +41 00 21.773228724 21.162 20.804 19.924 19.358 18.631 ~ 9 0
87 M31GC J004345+411812 GlC 00 43 45.09 +41 18 12.0 19.683 19.579 19.152 18.869 18.474 ~ 16 1
88 Bol 195 GlC 00 43 48.55 +41 02 27.6 18.57 19.311 18.652 18.265 17.732 ~ 16 1
89 Bol D106 GlC 00 43 54.45 +41 15 13.7 18.45   18.28   17.62 ~ 20 1
90 Bol D108 GlC 00 43 57.10 +41 45 32.8 19.199 18.962 18.454 18.022 17.397 ~ 12 1
91 Bol 210 GlC 00 44 02.78 +41 14 24.5 18.14 18.09 17.57 17.21 16.20 ~ 34 1
92 M31GC J004403+412140 GlC 00 44 02.8067385600 +41 21 40.257375840 20.236 19.811 18.861 18.213 17.499 ~ 14 0
93 M31GC J004408+412354 GlC 00 44 08.04 +41 23 54.2 20.12   19.53   17.81 ~ 14 1
94 Bol 216 GlC 00 44 08.78 +41 37 55.8 17.543 17.556 17.168 16.899 16.548 ~ 41 1
95 M31GC J004414+412219 GlC 00 44 13.9494375408 +41 22 18.889070808 18.174 18.765 18.637 18.556 19.43 ~ 17 1
96 Bol 277 Cl* 00 44 16.91 +41 14 15.8 20.202 19.879 18.50 18.669 18.195 ~ 18 0
97 M31GC J004419+412110 GlC 00 44 18.92 +41 21 09.6 19.136 19.057 18.690 18.495 18.267 ~ 15 1
98 M31GC J004420+412409 GlC 00 44 19.67 +41 24 08.9 19.13 18.942 18.666 18.545 18.370 ~ 15 1
99 M31GC J004420+412720 * 00 44 20.2304755464 +41 27 19.786726080   21.636 20.006 18.867 17.777 ~ 12 0
100 Bol D112 GlC 00 44 21.1701439080 +41 19 10.183273464 19.606 19.313 18.607 18.129 17.580 ~ 16 0
101 Bol 278 GlC 00 44 23.32 +41 35 03.8 19.400 19.265 18.867 18.553 18.133 ~ 19 1
102 M31GC J004424+413359 GlC 00 44 24.27 +41 33 58.1 19.390 19.362 19.015 18.716 18.167 ~ 17 1
103 Bol 222 GlC 00 44 25.3441465992 +41 14 11.911954848 18.683 18.385 17.686 17.235 16.749 ~ 44 1
104 M31GC J004431+412755 GlC 00 44 31.51 +41 27 55.3 21.007 20.487 19.526 18.867 18.070 ~ 15 1
105 M31GC J004435+415328 GlC 00 44 34.80 +41 53 27.2 17.35 17.74 18.32   17.15 ~ 23 1
106 M31GC J004436+413533 GlC 00 44 36.37 +41 35 33.1 20.469 19.988 19.099 18.481 17.804 ~ 18 0
107 M31GC J004438+412852 GlC 00 44 37.8529701696 +41 28 51.970167624 20.177 19.870 19.059 18.509 17.884 ~ 16 0
108 Bol D118 GlC 00 44 39.70 +41 24 27.9 18.532 18.707 18.290 17.907 17.346 ~ 22 1
109 Bol 281 GlC 00 44 42.8163090504 +41 20 08.475815436 18.756 18.405 17.67 17.021 16.375 ~ 30 0
110 Bol 367 GlC 00 44 47.1952661535 +42 05 32.601974266 18.506 18.508 18.078 17.810 17.276 ~ 29 1
111 Bol 368 GlC 00 44 47.80 +41 51 09.1 17.851 18.288 18.05 18.035 17.839 ~ 40 1
112 KHM31 246 GlC 00 44 54.7213995336 +41 28 51.259665216 20.429 20.319 19.829 19.586 19.016 ~ 12 0
113 Bol 475 GlC 00 44 56.0159559456 +41 54 00.583559928 17.753 17.644 17.56 16.936 16.406 ~ 31 1
114 [MKK98] M 31 53 Cl* 00 44 57.2592128952 +41 48 01.909804068 20.726 20.367 19.225 18.503 17.634 ~ 15 0
115 Bol D257 GlC 00 44 59.50 +41 54 46.8 18.70 18.93 18.48   17.60 ~ 31 1
116 M31GC J004503+414703 GlC 00 45 02.76 +41 47 02.3 21.85 21.075 20.054 19.355 18.576 ~ 12 0
117 [JSD2015] AP 680 GlC 00 45 03.35 +41 40 04.9 20.604 19.898 18.817 18.089 17.185 ~ 17 0
118 M31GC J004504+414621 GlC 00 45 04.0636015752 +41 46 20.890569360 19.588 19.354 18.759 18.390 17.803 ~ 15 1
119 Bol 476 GlC 00 45 07.18 +41 40 31.2 19.514 19.246 18.12 17.925 17.258 ~ 21 0
120 Bol 477 GlC 00 45 08.3248768344 +41 39 37.862863668 18.610 18.645 18.46 18.124 17.819 ~ 30 1
121 M31GC J004511+420012 GlC 00 45 10.52 +42 00 12.0 17.16 18.42 18.36   18.37 ~ 19 1
122 M31GC J004512+414020 GlC 00 45 11.78 +41 40 19.7 21.18 20.596 19.601 18.901 18.128 ~ 14 0
123 M31GC J004514+414226 GlC 00 45 13.8073085976 +41 42 26.178148116 18.636 18.702 18.404 18.277 18.021 ~ 18 1
124 [JSD2015] AP 983 GlC 00 45 15.1453094064 +41 47 32.042522688 19.86 20.421 19.892 19.500 18.838 ~ 15 1
125 M31GC J004518+414058 GlC 00 45 17.7814824912 +41 40 58.225642716 20.18 20.094 19.638 19.361 19.058 ~ 13 1
126 [JSD2015] AP 24 GlC 00 45 19.5733827840 +41 48 30.234086676 18.85 19.421 19.177 19.034 18.617 ~ 15 1
127 M31GC J004522+414757 GlC 00 45 22.27 +41 47 56.9 21.376 21.156 20.453 19.959 19.494 ~ 14 0
128 M31GC J004526+414552 GlC 00 45 26.2303662576 +41 45 52.082463384 19.746 19.717 19.416 19.270 18.969 ~ 16 1
129 Bol 371 GlC 00 45 27.1576379256 +41 43 44.931893556 18.437 18.285 17.54 17.516 17.051 ~ 24 1
130 M31GC J004528+414204 GlC 00 45 28.01 +41 42 03.6 20.25 19.766 19.229 18.837 18.264 ~ 14 1
131 M31GC J004528+414929 GlC 00 45 28.49 +41 49 29.6 19.011 18.903 18.388 18.111 17.746 ~ 16 1
132 M31GC J004532+414932 GlC 00 45 32.07 +41 49 32.1 19.282 19.011 18.228 17.682 16.980 ~ 12 1
133 M31GC J004532+414334 Gl? 00 45 32.48 +41 43 33.5 20.874 20.511 19.746 19.253 18.647 ~ 10 1
134 M31GC J004533+414331 GlC 00 45 32.51 +41 43 30.8 20.032 19.602 18.825 18.259 17.525 ~ 10 0
135 M31GC J004533+414220 GlC 00 45 33.10 +41 42 19.2 20.020 19.725 19.048 18.575 17.920 ~ 17 1
136 M31GC J004536+414518 GlC 00 45 35.5893272568 +41 45 18.342975420 20.434 20.139 19.324 18.783 18.094 ~ 14 1
137 Bol 374 GlC 00 45 44.5368038232 +41 41 54.795042240 19.16 18.698 18.31 17.861 17.447 ~ 34 1
138 Bol 480 GlC 00 45 45.55 +41 45 52.5 18.665 18.560 18.139 17.892 17.492 ~ 28 1
139 M31GC J004546+414820 GlC 00 45 46.28 +41 48 20.9 20.083 19.881 19.219 18.785 18.059 ~ 13 1
140 Bol 376 GlC 00 45 48.39 +41 42 39.9 18.325 18.371 17.974 17.725 17.349 ~ 36 1
141 M31GC J004549+414820 GlC 00 45 48.8439859200 +41 48 20.116459656 19.267 19.158 18.675 18.432 18.128 ~ 15 1
142 M31GC J004550+413926 GlC 00 45 49.69 +41 39 26.2 19.975 19.824 19.066 18.563 17.967 ~ 12 0
143 Bol 484 GlC 00 45 53.8935132696 +41 47 36.718439172 18.822 18.690 18.10 17.893 17.483 ~ 28 1
144 Bol 483 GlC 00 45 53.9069257200 +42 02 17.993603436 18.994 18.839 18.397 18.098 17.576 ~ 28 1
145 Bol 392 GlC 00 47 00.9116701536 +41 54 44.314456140 17.603 17.405 16.757 16.345 15.900 ~ 19 1
146 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
147 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
148 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
149 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
150 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
151 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
152 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
153 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
154 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
155 NAME Local Group GrG ~ ~           ~ 9325 0

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