2016A&A...594A..82R

Query : 2016A&A...594A..82R

2016A&A...594A..82R - Astronomy and Astrophysics, volume 594A82-82 (2016/10-1)

X-ray and optical spectroscopy of the massive young open cluster IC 1805.

RAUW G. and NAZE Y.

Abstract (from CDS):

Context. Very young open clusters are ideal places to study the X-ray properties of a homogeneous population of early-type stars. In this respect, the IC 1805 open cluster is very interesting as it hosts the O4 If+ star HD 15570 thought to be in an evolutionary stage intermediate between a normal O-star and a Wolf-Rayet star.
Aims. Such a star could provide a test for theoretical models aiming at explaining the empirical scaling relation between the X-ray and bolometric luminosities of O-type stars.
Methods. We have observed IC 1805 with XMM-Newton and further collected optical spectroscopy of some of the O-star members of the cluster.
Results. The optical spectra allow us to revisit the orbital solutions of BD+60deg 497 and HD 15558, and provide the first evidence of binarity for BD+60deg 498. X-ray emission from colliding winds does not appear to play an important role among the O-stars of IC 1805. Notably, the X-ray fluxes do not vary significantly between archival X-ray observations and our XMM-Newton pointing. The very fast rotator BD+60deg 513, and to a lesser extent the O4 If+ star HD 15570 appear somewhat underluminous. Whilst the underluminosity of HD 15570 is only marginally significant, its amplitude is found to be compatible with theoretical expectations based on its stellar and wind properties. A number of other X-ray sources are detected in the field, and the brightest objects, many of which are likely low-mass pre-main sequence stars, are analyzed in detail.

Abstract Copyright: © ESO, 2016

Journal keyword(s): stars: early-type - open clusters and associations: individual: IC 1805 - X-rays: stars

VizieR on-line data: <Available at CDS (J/A+A/594/A82): tablea1.dat>

CDS comments: Paragraph 4.1.3 Cl* Trumpler 14 MJ 257 not identified.

Simbad objects: 205

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Number of rows : 205
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 HD 14947 s*b 02 26 46.9899705528 +58 52 33.118732380 7.83 8.44 7.98     O4.5If 262 0
2 XMMU J023039.8+612949 X 02 30 39.873 +61 29 49.62           ~ 1 0
3 XMMU J023040.1+613040 Y*? 02 30 40.19 +61 30 41.9           ~ 2 0
4 ZTF J023050.77+613022.3 LP* 02 30 50.7735275736 +61 30 22.262857524           ~ 7 0
5 XMMU J023113.7+612712 X 02 31 13.771 +61 27 12.29           ~ 1 0
6 XMMU J023116.3+612321 X 02 31 16.339 +61 23 21.69           ~ 1 0
7 XMMU J023121.7+613020 X 02 31 21.778 +61 30 20.84           ~ 1 0
8 XMMU J023122.8+613748 X 02 31 22.854 +61 37 48.74           ~ 1 0
9 XMMU J023124.2+613702 X 02 31 24.275 +61 37 02.89           ~ 1 0
10 XMMU J023127.7+611513 X 02 31 27.700 +61 15 13.33           ~ 1 0
11 XMMU J023128.1+611644 X 02 31 28.154 +61 16 44.40           ~ 1 0
12 XMMU J023129.2+612725 X 02 31 29.239 +61 27 25.31           ~ 1 0
13 XMMU J023129.2+613623 X 02 31 29.282 +61 36 23.38           ~ 1 0
14 XMMU J023138.6+613209 X 02 31 38.600 +61 32 09.53           ~ 1 0
15 XMMU J023145.6+612856 X 02 31 45.632 +61 28 56.25           ~ 1 0
16 XMMU J023147.0+613025 X 02 31 47.048 +61 30 25.70           ~ 1 0
17 XMMU J023147.2+613207 X 02 31 47.205 +61 32 07.53           ~ 1 0
18 2MASS J02315021+6136000 Y*O 02 31 50.2263712040 +61 35 59.940012418     16.432 15.509 14.587 ~ 6 0
19 XMMU J023150.5+613257 Y*? 02 31 50.398 +61 32 59.24           ~ 2 0
20 2MASS J02315073+6133323 Y*O 02 31 50.7367268928 +61 33 32.262243732           f8V 3 0
21 2MASS J02315238+6128279 Y*? 02 31 52.385 +61 28 27.91           ~ 2 0
22 2MASS J02315515+6131229 Or* 02 31 55.1580881146 +61 31 22.857359753     18.065 16.983 15.927 ~ 3 0
23 XMMU J023155.3+612249 X 02 31 55.337 +61 22 49.77           ~ 1 0
24 XMMU J023156.4+613235 X 02 31 56.421 +61 32 35.00           ~ 1 0
25 XMMU J023156.6+613345 X 02 31 56.659 +61 33 45.38           ~ 1 0
26 BD+60 497 Y*O 02 31 57.0901516200 +61 36 43.948697940 10.466 9.39 8.85     O6.5V((f))+O8/B0V 110 0
27 2MASS J02315707+6132448 Or* 02 31 57.1476110675 +61 32 44.690451033     20.321 18.943 17.639 ~ 6 0
28 XMMU J023157.4+613348 X 02 31 57.459 +61 33 48.03           ~ 1 0
29 XMMU J023200.0+612050 X 02 32 00.028 +61 20 50.60           ~ 1 0
30 CXOU J023200.4+612039 Y*O 02 32 00.458 +61 20 39.05           ~ 2 0
31 XMMU J023200.7+613153 X 02 32 00.702 +61 31 53.05           ~ 1 0
32 IC 1805 108 Y*? 02 32 01.9040269296 +61 26 48.869524572 13.76 13.59 12.80     g0V 9 0
33 2MASS J02320270+6129520 Or* 02 32 02.7200155416 +61 29 51.987589872 14.51 15.51 20.859 19.271 17.811 ~ 6 0
34 ZTF J023206.97+613243.0 Or* 02 32 06.9911370096 +61 32 42.825338556     18.255 17.018 15.896 ~ 9 0
35 ZTF J023207.99+612203.6 Or* 02 32 08.0221389960 +61 22 03.550312272     16.067 15.188 14.362 k4V 8 0
36 XMMU J023208.4+613529 X 02 32 08.444 +61 35 29.80           ~ 1 0
37 IC 1805 110 Y*O 02 32 09.0572821368 +61 26 30.136232724 14.57 14.04 13.26     A8III 11 0
38 XMMU J023209.1+613246 X 02 32 09.151 +61 32 46.36           ~ 1 0
39 2MASS J02320924+6130404 Y*O 02 32 09.2429735400 +61 30 40.412616660           ~ 5 0
40 LS I +61 275 EB* 02 32 09.6299057496 +61 38 23.556279372 11.59 12.04 11.445 11.64   B1V 37 0
41 BD+60 498 Y*O 02 32 10.8542551368 +61 33 07.940208384 11.61 10.47 9.94     O9V 113 0
42 2MASS J02321111+6131027 Y*O 02 32 11.1227905344 +61 31 02.859312360 16.03 15.97 15.13     B8 11 0
43 EM* MWC 50 Y*? 02 32 11.4523605192 +61 21 45.253334772 11.64 11.77 10.87     Be 45 0
44 XMMU J023212.5+613856 X 02 32 12.581 +61 38 56.23           ~ 1 0
45 2MASS J02321420+6133367 Or* 02 32 14.1910933950 +61 33 36.685472096     20.044 18.583 17.169 ~ 3 0
46 XMMU J023216.4+613209 X 02 32 16.452 +61 32 09.30           ~ 1 0
47 BD+60 499 Y*O 02 32 16.7518284696 +61 33 14.996422332 10.27 10.85 10.31     O9.5V 87 0
48 CXOU J023216.9+612927 Y*O 02 32 16.9633764456 +61 29 27.371271768     20.576 19.159 17.827 ~ 4 0
49 XMMU J023218.2+612650 X 02 32 18.271 +61 26 50.56           ~ 1 0
50 2MASS J02321872+6131180 Or* 02 32 18.7145674279 +61 31 18.029524204     18.492 17.291 16.213 ~ 3 0
51 2MASS J02322016+6130148 Y*? 02 32 20.166 +61 30 14.85           ~ 2 0
52 ZTF J023220.94+612719.3 Or* 02 32 20.9450894517 +61 27 19.217205314     16.975 15.948 14.992 g5V 7 0
53 2MASS J02322142+6133006 Or* 02 32 21.4000378849 +61 33 00.670739978     20.863 19.094 17.706 ~ 4 0
54 2MASS J02322153+6132368 Y*? 02 32 21.5348508887 +61 32 36.906847590           g0V 3 0
55 2MASS J02322221+6123451 Y*O 02 32 22.2262836288 +61 23 45.398373792           ~ 3 0
56 2MASS J02322487+6132515 Y*O 02 32 24.8766473663 +61 32 51.547498803     17.985 16.924 15.878 ~ 5 0
57 2MASS J02322520+6130310 Y*? 02 32 25.209 +61 30 31.02           ~ 2 0
58 XMMU J023226.3+613111 X 02 32 26.399 +61 31 11.00           ~ 1 0
59 IC 1805 130 Y*O 02 32 29.9162703768 +61 27 07.623298728 13.91 14.03 13.434 12.951 12.428 B3V 17 0
60 2MASS J02323020+6117489 Y*O 02 32 30.2095262256 +61 17 48.946858476 11.36 11.18 10.59     ~ 9 0
61 XMMU J023230.7+613609 Y*O 02 32 30.5293263001 +61 36 08.344550582     18.169 17.062 16.008 ~ 2 0
62 XMMU J023230.8+613206 X 02 32 30.828 +61 32 06.70           ~ 1 0
63 XMMU J023231.9+613719 X 02 32 31.994 +61 37 19.62           ~ 1 0
64 2MASS J02323268+6138342 Y*O 02 32 32.6861806872 +61 38 34.141020792 14.81 14.70 14.07     B7V 8 0
65 ZTF J023232.97+612619.2 Or* 02 32 32.9831609665 +61 26 19.168642640     19.415 18.059 16.833 ~ 5 0
66 2MASS J02323312+6124275 Y*O 02 32 33.1257582480 +61 24 27.382884444 16.81 16.75 15.74     a3V 7 0
67 XMMU J023233.5+611845 X 02 32 33.507 +61 18 45.59           ~ 1 0
68 XMMU J023234.2+611728 X 02 32 34.267 +61 17 28.81           ~ 1 0
69 XMMU J023236.1+612758 X 02 32 36.199 +61 27 58.97           ~ 1 0
70 BD+60 501 Y*O 02 32 36.2781863760 +61 28 25.586191812 11.062 10.02 9.56     O7V(n)((f))z 124 0
71 XMMU J023236.4+612840 Y*O 02 32 36.2871946403 +61 28 41.034551710     20.121 18.798 17.520 ~ 2 0
72 XMMU J023237.2+612810 X 02 32 37.269 +61 28 10.25           ~ 1 0
73 IC 1805 139 Y*O 02 32 37.4109279840 +61 32 19.288779432 13.51 13.63 13.10     B4V 9 0
74 2MASS J02323857+6132049 Y*O 02 32 38.5747918512 +61 32 04.915579200     17.987 16.843 15.768 ~ 6 0
75 2MASS J02323956+6126579 Y*? 02 32 39.5573780400 +61 26 57.878765743           ~ 3 0
76 2MASS J02323972+6121549 Or* 02 32 39.7245695640 +61 21 54.830779416     21.712 20.106 18.654 ~ 4 0
77 ZTF J023240.21+612814.8 Y*O 02 32 40.2196521706 +61 28 14.729606220           ~ 5 0
78 XMMU J023240.6+612519 X 02 32 40.680 +61 25 19.28           ~ 1 0
79 LS I +61 283 Y*O 02 32 40.8309131016 +61 27 59.823575892 11.44 11.95 11.40     B0.5V 30 0
80 2MASS J02324147+6125537 Y*O 02 32 41.4683252712 +61 25 53.756466564     15.879 14.906 13.996 f6V 12 0
81 XMMU J023242.0+614021 X 02 32 42.030 +61 40 21.81           ~ 1 0
82 XMMU J023242.2+612703 X 02 32 42.267 +61 27 03.67           ~ 1 0
83 HD 15558 Y*O 02 32 42.5366901168 +61 27 21.572901360 7.82 8.37 7.87 7.34 6.94 O4.5III(f) 324 0
84 ZTF J023243.14+613058.8 Or* 02 32 43.1491210008 +61 30 58.796783748     15.808 14.836 13.974 Ae/Be 15 0
85 2MASS J02324320+6128044 Y*O 02 32 43.2023938488 +61 28 04.434187764 14.70 14.70 13.93     A6 12 0
86 2MASS J02324324+6133353 Y*? 02 32 43.2547702944 +61 33 35.252800560           ~ 3 0
87 IC 1805 152 Y*O 02 32 43.5296031792 +61 26 31.923173220 13.52 13.64 12.91     B3V 15 0
88 LS I +61 285 Y*O 02 32 43.9072458024 +61 27 20.390870772 10.73 11.19 10.65     B2 25 0
89 2MASS J02324412+6130397 Or* 02 32 44.1257220912 +61 30 39.780804024     17.393 16.330 15.316 g8IV 6 0
90 2MASS J02324552+6126313 Y*O 02 32 45.5254087512 +61 26 31.181872266     18.045 16.868 15.791 ~ 5 0
91 ZTF J023245.75+612959.4 Y*O 02 32 45.7635094176 +61 29 59.393642280     19.240 18.030 16.844 ~ 6 0
92 ZTF J023246.21+612729.6 Or* 02 32 46.2188005800 +61 27 29.569233930     19.161 17.931 16.752 ~ 6 0
93 XMMU J023247.1+613754 RS* 02 32 47.2539077169 +61 37 55.092924405           ~ 4 0
94 2MASS J02324851+6124272 Or* 02 32 48.5071419114 +61 24 27.214778093     19.428 18.102 16.919 ~ 3 0
95 XMMU J023248.7+614050 X 02 32 48.719 +61 40 50.10           ~ 1 0
96 XMMU J023249.3+613615 Y*O 02 32 49.4013652649 +61 36 15.006299303     17.453 16.506 15.626 ~ 6 0
97 HD 15570 Y*O 02 32 49.4207394600 +61 22 42.089384892 8.40 8.80 8.11 7.41 6.86 O4If 316 0
98 2MASS J02325037+6133419 Y*O 02 32 50.3682604176 +61 33 41.921399628     17.252 16.319 15.479 ~ 6 0
99 IC 1805 OpC 02 32 52.1 +61 28 36           ~ 542 1
100 2MASS J02325396+6128041 Y*O 02 32 53.9561698272 +61 28 04.172562624     17.850 16.835 15.911 ~ 6 0
101 2MASS J02325400+6125278 Y*O 02 32 54.0026221631 +61 25 27.864391893     20.706 19.248 17.939 ~ 3 0
102 2MASS J02325403+6134119 Y*? 02 32 54.039 +61 34 11.94           ~ 2 0
103 XMMU J023256.4+612534 X 02 32 56.466 +61 25 34.49           ~ 1 0
104 XMMU J023256.7+613040 X 02 32 56.711 +61 30 40.62           ~ 1 0
105 XMMU J023257.2+612108 X 02 32 57.290 +61 21 08.55           ~ 1 0
106 IC 1805 166 Y*O 02 32 57.8246261160 +61 27 26.532821700 12.28 12.56 11.99     B2V 25 0
107 XMMU J023259.1+612556 X 02 32 59.182 +61 25 56.50           ~ 1 0
108 2MASS J02325991+6125031 Y*O 02 32 59.9129122872 +61 25 03.118231380     19.361 18.001 16.718 ~ 5 0
109 2MASS J02330078+6126095 Y*O 02 33 00.7791868038 +61 26 09.599982993     18.913 17.731 16.638 ~ 3 0
110 XMMU J023300.8+612912 X 02 33 00.868 +61 29 12.00           ~ 1 0
111 XMMU J023300.9+613737 X 02 33 00.969 +61 37 37.82           ~ 1 0
112 2MASS J02330106+6127047 Y*? 02 33 01.062 +61 27 04.80           ~ 2 0
113 CXOU J023301.4+613133 Y*O 02 33 01.420 +61 31 33.91           ~ 3 0
114 XMMU J023302.9+612605 X 02 33 02.926 +61 26 05.82           ~ 1 0
115 2MASS J02330383+6129093 Y*O 02 33 03.8306027064 +61 29 09.244447800     19.902 18.463 17.115 ~ 6 0
116 2MASS J02330465+6133424 Y*O 02 33 04.6748230176 +61 33 42.420887748           ~ 3 0
117 IC 1805 175 Y*O 02 33 05.2757131680 +61 27 07.152609852 13.54 13.70 13.07     B2.5V 15 0
118 ZTF J023305.36+612250.6 Or* 02 33 05.3687912689 +61 22 50.580859278     17.863 16.761 15.766 ~ 5 0
119 XMMU J023305.6+612201 X 02 33 05.696 +61 22 01.79           ~ 1 0
120 XMMU J023306.1+613731 * 02 33 06.1035153050 +61 37 30.479697160           ~ 2 0
121 2MASS J02330714+6136097 Y*O 02 33 07.1404243992 +61 36 09.683366580     17.671 16.638 15.672 ~ 4 0
122 XMMU J023307.8+614043 X 02 33 07.825 +61 40 43.84           ~ 1 0
123 ZTF J023308.87+612522.1 Or* 02 33 08.8722268612 +61 25 22.099037599     17.294 16.280 15.321 g5V 9 0
124 2MASS J02330888+6128455 Y*O 02 33 08.8931343648 +61 28 45.556284540 15.49 15.48 14.83     b8IV,Ae/Be 10 0
125 ZTF J023309.94+612459.5 Or* 02 33 09.9464741120 +61 24 59.496792177     19.102 17.882 16.744 ~ 7 0
126 2MASS J02331002+6132086 Or* 02 33 10.0259760936 +61 32 08.624531472     19.728 18.351 17.088 ~ 6 0
127 ZTF J023310.32+614106.2 EB* 02 33 10.32 +61 41 06.3           ~ 3 0
128 2MASS J02331034+6124025 Y*O 02 33 10.3561315080 +61 24 02.487325655     20.246 18.917 17.703 ~ 3 0
129 2MASS J02331111+6130192 Or* 02 33 11.1220960056 +61 30 19.203166152     17.387 16.204 15.152 k-mV 7 0
130 2MASS J02331141+6131150 Or* 02 33 11.4222513408 +61 31 14.968401384     17.180 16.117 15.173 ~ 6 0
131 IC 1805 184 Y*O 02 33 11.9491545048 +61 30 57.732944580 14.53 14.37 13.64     f5V 6 0
132 ZTF J023312.90+613132.3 Y*O 02 33 12.9069334005 +61 31 32.250026774     19.874 18.532 17.220 ~ 5 0
133 2MASS J02331342+6131522 Y*O 02 33 13.4358844296 +61 31 52.191792084           ~ 4 0
134 IC 1805 187 Y*O 02 33 14.6477229144 +61 24 02.849610672 13.62 13.17 12.41     b-f 9 0
135 XMMU J023314.6+613011 Y*? 02 33 14.917 +61 30 10.89           ~ 2 0
136 2MASS J02331524+6126057 Y*O 02 33 15.2393067458 +61 26 05.624193665     20.642 19.237 17.952 ~ 3 0
137 ZTF J023315.56+613144.4 Or* 02 33 15.5641229725 +61 31 44.392385021     19.149 17.860 16.646 ~ 5 0
138 ZTF J023316.18+612048.4 Or* 02 33 16.1833617659 +61 20 48.335298585     17.779 16.659 15.637 ~ 7 0
139 ZTF J023317.48+612808.4 Y*O 02 33 17.4758880091 +61 28 08.360423521     16.836 15.862 14.967 g 7 0
140 CXOU J023317.8+612828 Y*O 02 33 17.8650266220 +61 28 27.999270157     19.447 18.301 17.231 ~ 4 0
141 2MASS J02332014+6122105 Y*O 02 33 20.1366691992 +61 22 10.565086692 16.83 17.00 15.47     F8 11 0
142 HD 15629 Y*O 02 33 20.5873992264 +61 31 18.188762844 8.23 8.85 8.42     O4.5V((fc)) 255 0
143 2MASS J02332163+6130147 Or* 02 33 21.6379463400 +61 30 14.769756216     16.342 15.312 14.419 ~ 6 0
144 XMMU J023322.5+612509 X 02 33 22.545 +61 25 09.14           ~ 1 0
145 2MASS J02332276+6127402 Or* 02 33 22.7696154288 +61 27 40.174922556     19.457 18.135 17.049 ~ 4 0
146 XMMU J023323.6+612443 Y*? 02 33 23.531 +61 24 43.52           ~ 2 0
147 XMMU J023325.0+613553 X 02 33 25.090 +61 35 53.94           ~ 1 0
148 ZTF J023325.15+612720.0 Or* 02 33 25.1574517519 +61 27 19.929080910     19.480 18.202 16.990 ~ 5 0
149 XMMU J023326.4+613531 X 02 33 26.482 +61 35 31.95           ~ 1 0
150 2MASS J02332858+6125271 Y*O 02 33 28.5768745680 +61 25 27.149062584           ~ 3 0
151 IC 1805 200 Y*O 02 33 30.0926019984 +61 28 54.018455628 14.58 14.58 13.90     B4V 13 0
152 2MASS J02333119+6129245 Y*? 02 33 31.191 +61 29 24.58           ~ 2 0
153 2MASS J02333263+6125149 Or* 02 33 32.6310238536 +61 25 14.942847576     19.396 18.089 16.831 ~ 5 0
154 XMMU J023332.8+613545 X 02 33 32.815 +61 35 45.09           ~ 1 0
155 XMMU J023333.0+612917 X 02 33 33.097 +61 29 17.21           ~ 1 0
156 XMMU J023333.4+612855 X 02 33 33.421 +61 28 55.37           ~ 1 0
157 XMMU J023334.4+612703 X 02 33 34.492 +61 27 03.99           ~ 1 0
158 XMMU J023334.5+613840 X 02 33 34.596 +61 38 40.27           ~ 1 0
159 XMMU J023334.6+611921 X 02 33 34.624 +61 19 21.91           ~ 1 0
160 XMMU J023335.0+612811 Or* 02 33 35.1686198338 +61 28 09.576081544     20.075 18.750 17.545 ~ 3 0
161 XMMU J023335.4+612852 X 02 33 35.472 +61 28 52.99           ~ 1 0
162 XMMU J023336.2+613637 X 02 33 36.254 +61 36 37.31           ~ 1 0
163 XMMU J023338.3+613103 X 02 33 38.328 +61 31 03.57           ~ 1 0
164 ZTF J023341.51+612501.7 Or* 02 33 41.4510543816 +61 25 01.617293568     16.038 15.218 14.511 ~ 6 0
165 XMMU J023344.2+612440 X 02 33 44.232 +61 24 40.88           ~ 1 0
166 ZTF J023345.67+612753.1 Y*O 02 33 45.6851612131 +61 27 53.013379208     19.700 18.351 17.072 ~ 6 0
167 XMMU J023347.7+612453 X 02 33 47.769 +61 24 53.37           ~ 1 0
168 ZTF J023348.34+612837.8 Or* 02 33 48.3489070688 +61 28 37.732933652     17.979 16.974 16.040 ~ 5 0
169 XMMU J023351.6+612213 X 02 33 51.691 +61 22 13.54           ~ 1 0
170 ZTF J023351.75+612526.0 Y*O 02 33 51.7631105774 +61 25 25.903375267     17.525 16.512 15.533 ~ 5 0
171 XMMU J023351.8+613355 X 02 33 51.857 +61 33 55.36           ~ 1 0
172 XMMU J023352.2+613737 X 02 33 52.234 +61 37 37.72           ~ 1 0
173 ZTF J023352.71+612617.9 Or* 02 33 52.7116624809 +61 26 17.807972033     17.689 16.667 15.754 ~ 7 0
174 XMMU J023353.0+613717 X 02 33 53.040 +61 37 17.01           ~ 1 0
175 XMMU J023353.7+612151 X 02 33 53.766 +61 21 51.80           ~ 1 0
176 XMMU J023354.4+613145 * 02 33 54.2857619596 +61 31 46.540440426           ~ 2 0
177 ZTF J023357.20+612627.9 Y*O 02 33 57.2018808264 +61 26 27.847977144 15.70 15.45 14.86     B5 13 0
178 XMMU J023359.8+613215 X 02 33 59.824 +61 32 15.58           ~ 1 0
179 BD+60 512 Y*O 02 34 00.4627547640 +61 23 46.062853584 9.38 10.94 10.25     F8V 15 0
180 BD+60 513 Y*O 02 34 02.5297182912 +61 23 10.877763048 9.38 9.88 9.39     O7Vnz 116 0
181 XMMU J023403.5+613323 X 02 34 03.573 +61 33 23.02           ~ 1 0
182 XMMU J023405.4+612940 X 02 34 05.426 +61 29 40.80           ~ 1 0
183 UCAC4 758-021716 PM* 02 34 07.3487166179 +61 28 19.513793776       15.899   ~ 2 0
184 2MASS J02340767+6129337 Y*O 02 34 07.6722211296 +61 29 33.656543808 18.51 17.29 16.27     ~ 3 0
185 [D75b] Em* 02-094 Be* 02 34 10.2683061096 +61 24 40.404354156 15.18 15.054 14.229 14.001   B8Ve 19 0
186 XMMU J023412.6+612611 X 02 34 12.631 +61 26 11.78           ~ 1 0
187 XMMU J023414.7+613027 X 02 34 14.748 +61 30 27.73           ~ 1 0
188 XMMU J023415.6+612442 Y*? 02 34 15.2708618928 +61 24 42.794980704           ~ 2 0
189 XMMU J023416.5+612741 X 02 34 16.545 +61 27 41.33           ~ 1 0
190 XMMU J023419.0+612446 X 02 34 19.065 +61 24 46.68           ~ 1 0
191 XMMU J023420.2+613532 X 02 34 20.244 +61 35 32.12           ~ 1 0
192 XMMU J023421.6+612342 X 02 34 21.667 +61 23 42.99           ~ 1 0
193 XMMU J023426.9+613307 X 02 34 26.934 +61 33 07.15           ~ 1 0
194 XMMU J023428.3+613341 X 02 34 28.334 +61 33 41.67           ~ 1 0
195 2MASS J02343148+6130350 Y*O 02 34 31.4910714120 +61 30 35.095652208 11.65 11.97 11.51     B2V 30 0
196 HD 16691 Em* 02 42 52.0259349000 +56 54 16.463813796 10.187 9.07 8.70     O4If 163 0
197 HD 93129A SB* 10 43 57.4587319296 -59 32 51.394897284 6.46 7.478 7.310 7.84   O2If* 180 0
198 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
199 NGC 6231 OpC 16 54 14.4 -41 48 53           ~ 562 0
200 Cl HM 1 OpC 17 19 00 -38 49.0           ~ 52 0
201 BD+40 4220 s*b 20 32 22.4238071594 +41 18 18.942475904 11.32 10.61 9.185     O7Iafep 414 0
202 Schulte 9 s*b 20 33 10.7362926720 +41 15 08.222370372 13.38 12.77 10.96     O5I+O4III 243 0
203 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
204 Schulte 7 * 20 33 14.1095938872 +41 20 21.904113804 12.24 12.00 10.55     O3If* 153 0
205 BD+40 4227A SB* 20 33 15.0781182864 +41 18 50.479292556 10.42 10.27 8.98 8.03 6.83 O6Ib(fc)+O4.5:III:(fc) 253 0

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