2011A&A...533A.121M

Query : 2011A&A...533A.121M

2011A&A...533A.121M - Astronomy and Astrophysics, volume 533A, 121-121 (2011/9-1)

Revealing the ``missing'' low-mass stars in the S254-S258 star forming region by deep X-ray imaging.

MUCCIARELLI P., PREIBISCH T. and ZINNECKER H.

Abstract (from CDS):

X-ray observations provide a very good way to reveal the population of young stars in star forming regions avoiding the biases introduced when selecting samples based on infrared excess. The aim of this study was to find an explanation for the remarkable morphology of the central part of the S254-S258 star forming complex, where a dense embedded cluster of very young stellar objects (S255-IR) is sandwiched between the two HII regions S255 and S257. This interesting configuration had led to different speculations such as dynamical ejection of the B-stars from the central cluster or triggered star formation in a cloud that was swept up in the collision zone between the two expanding HII regions. The presence or absence, and the spatial distribution of low-mass stars associated with these B-stars can discriminate between the possible scenarios. We performed a deep Chandra X-ray observation of the S254-S258 region in order to efficiently discriminate young stars (with and without circumstellar matter) from the numerous older field stars in the area. We detected 364 X-ray point sources in a 17'x17' field (≃8x8pc). This X-ray catalog provides, for the first time, a complete sample of all young stars in the region down to ∼0.5M☉. A clustering analysis identifies three significant clusters: the central embedded cluster S255-IR and two smaller clusterings in S256 and S258. Sixty-four X-ray sources can be classified as members in one of these clusters. After accounting for X-ray background contaminants, this implies that about 250 X-ray sources constitute a widely scattered population of young stars, distributed over the full field-of-view of our X-ray image. This distributed young stellar population is considerably larger than the previously known number of non-clustered young stars selected by infrared excesses. Comparison of the X-ray luminosity function with that of the Orion Nebula Cluster suggests a total population of ∼2000 young stars in the observed part of the S254-S258 region. The observed number of ∼250 X-ray detected distributed young stars agrees well with the expectation for the low-mass population associated to the B-stars in S255 and S257 as predicted by an IMF extrapolation. These results are consistent with the scenario that these two B-stars represent an earlier stellar population and that their expanding HII regions have swept up the central cloud and trigger star formation (i.e. the central embedded cluster S255-IR) therein.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: pre-main sequence - open clusters and associations: individual: S254-S258 - X-rays: stars

VizieR on-line data: <Available at CDS (J/A+A/533/A121): table2.dat table3.dat table5.dat>

Simbad objects: 379

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Number of rows : 379
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2334 0
2 Ass Gem OB 1 As* 06 09.8 +21 35           ~ 191 0
3 CXOU J061147.8+180312 * 06 11 47.8238445096 +18 03 10.655130168           ~ 1 0
4 CXOU J061154.8+180016 X 06 11 54.838 +18 00 16.58           ~ 1 0
5 LBN 192.48-00.21 HII 06 11 59 +18 03.3           ~ 94 0
6 CXOU J061159.5+175802 X 06 11 59.50 +17 58 02.6           ~ 1 0
7 CXOU J061200.2+175716 X 06 12 00.230 +17 57 16.81           ~ 1 0
8 UCAC4 541-023513 Y*O 06 12 06.6210271872 +18 03 35.312546772   15.95 14.87 14.48   ~ 3 0
9 CXOU J061206.7+180836 * 06 12 06.7180990752 +18 08 37.911300864           ~ 1 0
10 CXOU J061217.9+175559 X 06 12 17.99 +17 55 59.7           ~ 1 0
11 CXOU J061219.6+175732 X 06 12 19.648 +17 57 32.41           ~ 1 0
12 HD 253247 Y*O 06 12 22.1116038408 +18 00 57.857095872 9.54 10.23 9.92 10.00   O9.5V 46 0
13 2MASS J06122320+1754092 Y*O 06 12 23.203 +17 54 09.25           ~ 3 0
14 2MASS J06122331+1755210 Y*O 06 12 23.314 +17 55 21.09           ~ 3 0
15 CXOU J061223.5+180420 X 06 12 23.598 +18 04 20.91           ~ 1 0
16 2MASS J06122430+1755152 Y*O 06 12 24.3067557816 +17 55 15.301203672           ~ 3 0
17 CXOU J061224.5+175929 X 06 12 24.515 +17 59 29.90           ~ 1 0
18 CXOU J061224.5+175710 X 06 12 24.539 +17 57 10.07           ~ 1 0
19 CXOU J061224.9+175924 X 06 12 24.9028655568 +17 59 25.029367224           ~ 1 0
20 CXOU J061225.1+180243 X 06 12 25.140 +18 02 43.75           ~ 1 0
21 2MASS J06122548+1755573 Y*O 06 12 25.482 +17 55 57.35           ~ 3 0
22 CXOU J061226.5+175935 X 06 12 26.58 +17 59 35.8           ~ 1 0
23 2MASS J06122698+1755023 Y*O 06 12 26.988 +17 55 02.32           ~ 3 0
24 2MASS J06122773+1801495 Em* 06 12 27.7357280160 +18 01 49.662955128           ~ 2 0
25 2MASS J06122816+1754364 Y*O 06 12 28.164 +17 54 36.46           ~ 3 0
26 CXOU J061229.2+180133 X 06 12 29.217 +18 01 33.15           ~ 1 0
27 CXOU J061229.9+175422 X 06 12 29.9732747064 +17 54 21.720998304           ~ 1 0
28 CXOU J061230.2+180348 X 06 12 30.212 +18 03 48.94           ~ 1 0
29 2MASS J06123033+1755509 Y*O 06 12 30.3364782840 +17 55 50.961731952           ~ 3 0
30 CXOU J061230.4+175506 X 06 12 30.4779336456 +17 55 06.984296256           ~ 1 0
31 CXOU J061230.6+175523 X 06 12 30.676 +17 55 23.66           ~ 1 0
32 ATO J093.1281+17.9904 Y*O 06 12 30.7641151416 +17 59 25.690090812         13.308 ~ 4 0
33 CXOU J061230.9+180336 X 06 12 30.9965714904 +18 03 37.158099984           ~ 1 0
34 CXOU J061231.1+175555 X 06 12 31.1545423344 +17 55 55.864567992           ~ 1 0
35 CXOU J061231.1+180853 X 06 12 31.2447315240 +18 08 53.518210548           ~ 1 0
36 2MASS J06123188+1753506 Y*O 06 12 31.883 +17 53 50.64           ~ 2 0
37 CXOU J061232.4+180024 X 06 12 32.4254561160 +18 00 24.931597428           ~ 1 0
38 CXOU J061232.9+180021 X 06 12 32.9934260736 +18 00 22.025964096           ~ 1 0
39 CXOU J061234.3+175803 X 06 12 34.338 +17 58 03.61           ~ 1 0
40 CXOU J061234.5+175611 X 06 12 34.534 +17 56 10.15           ~ 1 0
41 CXOU J061234.8+180128 X 06 12 34.81 +18 01 28.3           ~ 1 0
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45 CXOU J061235.5+175456 X 06 12 35.621 +17 54 56.43           ~ 1 0
46 SH 2-256 HII 06 12 36 +17 56.9           ~ 58 1
47 2MASS J06123606+1755463 Y*O 06 12 36.066 +17 55 46.35           ~ 3 0
48 CXOU J061236.0+175648 X 06 12 36.0792357528 +17 56 48.823618092           ~ 1 0
49 2MASS J06123611+1756535 Y*O 06 12 36.1086205728 +17 56 53.522178360           ~ 3 0
50 CXOU J061236.1+180515 X 06 12 36.118 +18 05 15.76           ~ 1 0
51 CXOU J061236.4+180247 X 06 12 36.422 +18 02 47.95           ~ 1 0
52 2MASS J06123645+1756414 Y*O 06 12 36.456 +17 56 41.43           ~ 3 0
53 2MASS J06123651+1756548 Y*O 06 12 36.5109899280 +17 56 54.798536148           B0.9V 4 0
54 CXOU J061236.5+175657 X 06 12 36.543 +17 56 57.22           ~ 1 0
55 CXOU J061236.5+180422 X 06 12 36.603 +18 04 22.98           ~ 1 0
56 2MASS J06123663+1755062 Y*O 06 12 36.6332640384 +17 55 06.210806412           ~ 4 1
57 CXOU J061236.8+180321 X 06 12 36.7850047656 +18 03 21.023178840           ~ 1 0
58 CXOU J061236.8+180623 X 06 12 36.807 +18 06 23.40           ~ 1 0
59 CXOU J061236.7+180133 X 06 12 36.81 +18 01 33.6           ~ 1 0
60 CXOU J061236.8+175705 X 06 12 36.8241962784 +17 57 05.458756572           ~ 1 0
61 CXOU J061236.8+175624 X 06 12 36.8395276848 +17 56 24.535722552           ~ 1 0
62 CXOU J061236.8+180434 X 06 12 36.91 +18 04 34.8           ~ 1 0
63 CXOU J061236.9+180009 X 06 12 36.988 +18 00 09.93           ~ 1 0
64 CXOU J061236.9+175836 X 06 12 36.995 +17 58 36.99           ~ 1 0
65 CXOU J061237.2+175957 X 06 12 37.212 +17 59 57.38           ~ 1 0
66 CXOU J061237.2+175546 X 06 12 37.2553102440 +17 55 46.252741584           ~ 1 0
67 2MASS J06123726+1756529 Y*O 06 12 37.2637262616 +17 56 52.845440064           ~ 3 0
68 CXOU J061237.4+180251 X 06 12 37.412 +18 02 51.35           ~ 1 0
69 CXOU J061237.5+180236 X 06 12 37.5791898144 +18 02 36.916809324           ~ 1 0
70 CXOU J061237.8+180801 X 06 12 37.8334780272 +18 08 01.057143156           ~ 1 0
71 CXOU J061238.0+175654 X 06 12 38.0911710768 +17 56 54.745425924           ~ 1 0
72 CXOU J061238.4+175659 X 06 12 38.435 +17 57 00.07           ~ 1 0
73 CXOU J061238.6+175700 X 06 12 38.61 +17 57 00.9           ~ 1 0
74 CXOU J061238.7+175857 X 06 12 38.705 +17 58 57.35           ~ 1 0
75 CXOU J061238.7+175640 X 06 12 38.7436652712 +17 56 40.402970592           ~ 1 0
76 CXOU J061238.9+180340 X 06 12 38.8861668984 +18 03 40.821477696           ~ 1 0
77 CXOU J061238.8+180404 X 06 12 38.89 +18 04 05.6           ~ 1 0
78 CXOU J061239.1+175421 X 06 12 39.08 +17 54 22.1           ~ 1 0
79 CXOU J061239.0+180037 * 06 12 39.1056743688 +18 00 37.939369752           ~ 1 0
80 CXOU J061239.3+175312 * 06 12 39.3090440496 +17 53 12.569265348           ~ 1 0
81 2MASS J06123954+1755390 Y*O 06 12 39.542 +17 55 39.09           ~ 3 0
82 2MASS J06124013+1757294 Y*O 06 12 40.1292248160 +17 57 29.670589368           ~ 3 0
83 CXOU J061240.3+175643 X 06 12 40.2984274752 +17 56 44.148161652           ~ 1 0
84 CXOU J061240.3+175532 X 06 12 40.350 +17 55 33.18           ~ 1 0
85 CXOU J061240.7+180334 X 06 12 40.728 +18 03 35.77           ~ 1 0
86 2MASS J06124078+1758357 Em* 06 12 40.7848972392 +17 58 35.763941856           ~ 2 0
87 CXOU J061240.7+175602 X 06 12 40.822 +17 56 03.15           ~ 1 0
88 CXOU J061241.1+180431 X 06 12 41.12 +18 04 32.1           ~ 1 0
89 CXOU J061241.7+180027 X 06 12 41.781 +18 00 27.94           ~ 1 0
90 2MASS J06124192+1803441 Y*O 06 12 41.9298621840 +18 03 44.167283388           ~ 3 0
91 CXOU J061242.1+175711 X 06 12 42.1899100584 +17 57 11.653541856           ~ 1 0
92 CXOU J061242.2+175954 X 06 12 42.2371933800 +17 59 54.978862524           ~ 1 0
93 2MASS J06124246+1754317 Y*O 06 12 42.4625993184 +17 54 31.720979052           ~ 3 0
94 CXOU J061242.7+180142 X 06 12 42.7784792304 +18 01 43.074760944           ~ 1 0
95 CXOU J061242.9+180119 X 06 12 42.941 +18 01 19.29           ~ 1 0
96 CXOU J061243.0+175639 X 06 12 43.060 +17 56 39.15           ~ 1 0
97 CXOU J061243.5+175509 X 06 12 43.49 +17 55 10.5           ~ 1 0
98 SH 2-257 HII 06 12 43.57 +17 59 33.1           ~ 131 1
99 2MASS J06124359+1755361 Y*O 06 12 43.596 +17 55 36.10           ~ 3 0
100 CXOU J061243.8+180023 X 06 12 43.826 +18 00 22.36           ~ 1 0
101 CXOU J061244.1+175651 X 06 12 44.1368466600 +17 56 52.129944384           ~ 1 0
102 HD 253327 Y*O 06 12 44.1784712232 +17 59 14.251982856 10.93 11.30 10.75 10.57   B0.5V 31 0
103 CXOU J061244.2+180437 X 06 12 44.2729571616 +18 04 37.159800708           ~ 1 0
104 CXOU J061244.3+180138 X 06 12 44.3119422000 +18 01 38.133745608           ~ 1 0
105 CXOU J061244.3+175317 X 06 12 44.386 +17 53 17.04           ~ 1 0
106 CXOU J061244.6+175641 X 06 12 44.705 +17 56 41.61           ~ 1 0
107 CXOU J061244.7+175946 * 06 12 44.7617541864 +17 59 47.065667820           ~ 1 0
108 CXOU J061244.8+180244 X 06 12 44.8790314704 +18 02 45.163000104           ~ 1 0
109 CXOU J061245.2+175810 X 06 12 45.254 +17 58 10.50           ~ 1 0
110 CXOU J061245.3+180755 X 06 12 45.386 +18 07 55.11           ~ 1 0
111 CXOU J061245.4+180414 X 06 12 45.4280430216 +18 04 15.546290484           ~ 1 0
112 2MASS J06124553+1803206 Y*O 06 12 45.5340317040 +18 03 20.572584336           ~ 3 0
113 2MASS J06124564+1756583 Y*O 06 12 45.6402789936 +17 56 58.249394412           ~ 3 0
114 CXOU J061245.9+175526 X 06 12 45.909 +17 55 27.10           ~ 1 0
115 2MASS J06124622+1756539 Y*O 06 12 46.2238998384 +17 56 53.846634840           ~ 3 0
116 2MASS J06124648+1804113 Y*O 06 12 46.4804373696 +18 04 11.348142672           ~ 3 0
117 CXOU J061246.6+180038 X 06 12 46.6244371968 +18 00 38.816871876           ~ 1 0
118 ATO J093.1947+17.9050 Y*O 06 12 46.7309182824 +17 54 18.260325972           ~ 3 0
119 CXOU J061247.0+175622 X 06 12 47.04 +17 56 22.8           ~ 1 0
120 CXOU J061247.0+175758 X 06 12 47.044 +17 57 58.20           ~ 1 0
121 2MASS J06124735+1802128 Y*O 06 12 47.3490196968 +18 02 12.858199116           ~ 3 0
122 CXOU J061247.4+180043 X 06 12 47.470 +18 00 43.12           ~ 1 0
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126 CXOU J061247.9+180728 X 06 12 47.9987086848 +18 07 27.360997176           ~ 1 0
127 NAME S254-258 complex SFR 06 12 48.0 +17 59 00           ~ 23 0
128 CXOU J061248.0+180052 X 06 12 48.007 +18 00 52.07           ~ 1 0
129 CXOU J061248.0+175836 X 06 12 48.010 +17 58 37.15           ~ 1 0
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133 CXOU J061248.9+175752 X 06 12 48.9909690720 +17 57 52.582745880           ~ 1 0
134 2MASS J06124900+1754367 Y*O 06 12 49.007 +17 54 36.73           ~ 3 0
135 CXOU J061249.1+180432 X 06 12 49.127 +18 04 32.04           ~ 1 0
136 2MASS J06124923+1803525 Y*O 06 12 49.2327530832 +18 03 52.603732080           ~ 3 0
137 CXOU J061249.4+175710 X 06 12 49.4082016992 +17 57 10.848654144           ~ 1 0
138 CXOU J061249.5+180008 X 06 12 49.5279621864 +18 00 09.228018672           ~ 1 0
139 2MASS J06124978+1804417 Y*O 06 12 49.7784152448 +18 04 41.778916644           ~ 3 0
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141 CXOU J061249.9+175345 X 06 12 50.0144087112 +17 53 46.263663132           ~ 1 0
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146 CXOU J061250.6+175251 X 06 12 50.65 +17 52 51.5           ~ 1 0
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149 CXOU J061250.8+175814 X 06 12 50.8125273432 +17 58 14.366952948           ~ 1 0
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153 2MASS J06125106+1806446 Y*O 06 12 51.0653662176 +18 06 44.627938164           ~ 2 0
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160 CXOU J061251.6+180040 X 06 12 51.635 +18 00 40.14           ~ 1 0
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162 CXOU J061251.7+180744 X 06 12 51.73 +18 07 43.3           ~ 1 0
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164 CXOU J061251.7+180434 X 06 12 51.747 +18 04 34.92           ~ 1 0
165 CXOU J061251.9+175851 X 06 12 51.947 +17 58 52.27           ~ 1 0
166 CXOU J061252.1+175857 X 06 12 52.10 +17 58 58.6           ~ 1 0
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169 CXOU J061252.2+180004 X 06 12 52.2421208424 +18 00 04.528940400           ~ 1 0
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172 CXOU J061252.2+175834 X 06 12 52.320 +17 58 35.24           ~ 1 0
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178 CXOU J061252.9+175801 X 06 12 52.940 +17 58 01.86           ~ 1 0
179 CXOU J061253.0+175811 X 06 12 52.96 +17 58 12.0           ~ 1 0
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181 CXOU J061253.0+180109 X 06 12 53.0501731344 +18 01 09.837981696           ~ 1 0
182 CXOU J061253.0+175934 X 06 12 53.115 +17 59 33.69           ~ 1 0
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184 CXOU J061253.1+180131 X 06 12 53.1283125528 +18 01 31.803818196           ~ 1 0
185 2MASS J06125318+1759058 Y*O 06 12 53.182 +17 59 05.86           G8/K0 5 0
186 SH 2-255 N HII 06 12 53.3 +18 00 42           ~ 30 0
187 2MASS J06125330+1759215 X 06 12 53.301 +17 59 21.57           ~ 4 0
188 CXOU J061253.3+180030 X 06 12 53.32 +18 00 31.3           ~ 1 0
189 2MASS J06125339+1800121 Y*O 06 12 53.398 +18 00 12.12           ~ 2 0
190 CXOU J061253.4+175621 Y*O 06 12 53.42 +17 56 21.4           ~ 3 0
191 CXOU J061253.4+175902 X 06 12 53.486 +17 59 02.00           ~ 1 0
192 CXOU J061253.4+175633 X 06 12 53.50 +17 56 33.9           ~ 1 0
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194 CXOU J061253.5+175915 X 06 12 53.555 +17 59 15.97           ~ 1 0
195 CXOU J061253.5+175908 X 06 12 53.580 +17 59 07.96           ~ 1 0
196 2MASS J06125362+1759279 X 06 12 53.63 +17 59 27.9           ~ 5 0
197 CXOU J061253.7+175724 X 06 12 53.72 +17 57 24.9           ~ 1 0
198 CXOU J061253.7+175748 X 06 12 53.77 +17 57 48.6           ~ 1 0
199 2MASS J06125377+1805113 Y*O 06 12 53.7713880000 +18 05 11.349734784           ~ 3 0
200 NAME S255-2 IR 06 12 53.8 +17 59 22           ~ 46 0
201 CXOU J061253.8+175928 X 06 12 53.82 +17 59 29.0           ~ 1 0
202 2MASS J06125385+1759242 X 06 12 53.85 +17 59 24.2           ~ 11 0
203 2MASS J06125387+1801440 Y*O 06 12 53.872 +18 01 44.08           ~ 3 0
204 2MASS J06125388+1759138 X 06 12 53.88 +17 59 13.9           ~ 4 0
205 CXOU J061253.8+175909 X 06 12 53.891 +17 59 09.73           ~ 1 0
206 CXOU J061253.9+180146 X 06 12 53.9303186160 +18 01 45.935998068           ~ 1 0
207 CXOU J061253.9+180013 X 06 12 53.934 +18 00 13.08           ~ 1 0
208 CXOU J061253.9+175920 X 06 12 53.951 +17 59 20.62           ~ 1 0
209 CXOU J061254.0+175925 X 06 12 53.97 +17 59 26.7           ~ 1 0
210 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 402 0
211 CXOU J061254.0+180009 X 06 12 54.06 +18 00 09.7           ~ 1 0
212 2MASS J06125410+1755404 Y*O 06 12 54.103 +17 55 40.49           ~ 3 0
213 2MASS J06125414+1759344 X 06 12 54.14 +17 59 34.5           ~ 3 0
214 CXOU J061254.1+175859 X 06 12 54.144 +17 58 59.79           ~ 1 0
215 2MASS J06125414+1759287 X 06 12 54.15 +17 59 28.8           ~ 4 0
216 2MASS J06125418+1759473 X 06 12 54.19 +17 59 47.4           ~ 2 0
217 CXOU J061254.3+175927 X 06 12 54.34 +17 59 28.0           ~ 1 0
218 CXOU J061254.3+175912 X 06 12 54.364 +17 59 12.46           ~ 1 0
219 CXOU J061254.3+175924 X 06 12 54.378 +17 59 25.35           ~ 1 0
220 CXOU J061254.4+175901 X 06 12 54.40 +17 59 01.7           ~ 1 0
221 CXOU J061254.3+175917 X 06 12 54.40 +17 59 17.5           ~ 1 0
222 CXOU J061254.3+175904 X 06 12 54.419 +17 59 04.46           ~ 1 0
223 CXOU J061254.4+175759 X 06 12 54.43 +17 57 59.3           ~ 1 0
224 2MASS J06125445+1759365 * 06 12 54.454 +17 59 36.57           K3 2 0
225 CXOU J061254.4+180058 X 06 12 54.483 +18 00 58.91           ~ 1 0
226 2MASS J06125452+1759029 Y*O 06 12 54.524 +17 59 02.90           K1 2 0
227 CXOU J061254.5+175850 X 06 12 54.543 +17 58 51.37           ~ 1 0
228 2MASS J06125458+1759173 Y*O 06 12 54.5852748192 +17 59 17.100493584           K3 2 0
229 CXOU J061254.6+175926 X 06 12 54.598 +17 59 27.08           ~ 1 0
230 2MASS J06125465+1802282 Y*O 06 12 54.6483513048 +18 02 28.270948668           ~ 3 0
231 CXOU J061254.6+175852 X 06 12 54.66 +17 58 52.2           ~ 1 0
232 [WBB2011] 4 * 06 12 54.8171091600 +17 59 12.879778200           M1.5 2 0
233 2MASS J06125488+1759407 X 06 12 54.88 +17 59 40.8           ~ 2 0
234 CXOU J061254.8+175719 X 06 12 54.882 +17 57 20.44           ~ 1 0
235 CXOU J061254.8+175930 X 06 12 54.89 +17 59 30.8           ~ 1 0
236 [WBB2011] 1 * 06 12 54.9139326864 +17 59 20.904327672           B3-B7 2 0
237 CXOU J061254.9+175705 X 06 12 55.005 +17 57 05.41           ~ 1 0
238 CXOU J061255.0+175920 X 06 12 55.017 +17 59 20.98           ~ 1 0
239 CXOU J061255.0+175915 X 06 12 55.0591206816 +17 59 15.185938416           ~ 1 0
240 CXOU J061255.0+175930 X 06 12 55.06 +17 59 31.0           ~ 1 0
241 CXOU J061255.1+175524 X 06 12 55.125 +17 55 24.59           ~ 1 0
242 CXOU J061255.1+180009 X 06 12 55.15 +18 00 09.6           ~ 1 0
243 2MASS J06125519+1757265 Y*O 06 12 55.197 +17 57 26.51           ~ 3 0
244 CXOU J061255.2+175843 X 06 12 55.29 +17 58 44.2           ~ 1 0
245 [TGJ91] S255 NIRS 19 X 06 12 55.4687158728 +17 59 24.216701640           ~ 2 0
246 CXOU J061255.4+175951 X 06 12 55.530 +17 59 51.73           ~ 1 0
247 CXOU J061255.6+180109 X 06 12 55.64 +18 01 09.7           ~ 1 0
248 CXOU J061255.7+175501 X 06 12 55.69 +17 55 02.4           ~ 1 0
249 CXOU J061255.7+180112 X 06 12 55.717 +18 01 12.47           ~ 1 0
250 CXOU J061255.8+175907 X 06 12 55.8083347000 +17 59 07.388003543           ~ 1 0
251 SH 2-255 S HII 06 12 56.1 +17 58 42           ~ 8 0
252 2MASS J06125610+1758516 Y*O 06 12 56.107 +17 58 51.64           ~ 3 0
253 2MASS J06125615+1803039 Y*O 06 12 56.1784945896 +18 03 03.696073056           ~ 3 0
254 2MASS J06125622+1802376 Y*O 06 12 56.2326014088 +18 02 37.710568968           ~ 3 0
255 2MASS J06125638+1759326 Y*O 06 12 56.382 +17 59 32.64           K2 2 0
256 CXOU J061256.7+175925 X 06 12 56.803 +17 59 25.89           ~ 1 0
257 CXOU J061256.9+175945 X 06 12 56.9350250208 +17 59 45.586689396           ~ 1 0
258 2MASS J06125694+1758502 Y*O 06 12 56.945 +17 58 50.24           ~ 3 0
259 CXOU J061257.0+175839 X 06 12 57.06 +17 58 39.8           ~ 1 0
260 CXOU J061257.2+180040 X 06 12 57.2158493832 +18 00 40.687366644           ~ 1 0
261 CXOU J061257.2+175932 X 06 12 57.283 +17 59 33.13           ~ 1 0
262 CXOU J061257.8+180146 X 06 12 57.852 +18 01 46.82           ~ 1 0
263 CXOU J061257.8+180334 X 06 12 57.96 +18 03 34.5           ~ 1 0
264 2MASS J06125812+1804264 Y*O 06 12 58.127 +18 04 26.43           ~ 3 0
265 2MASS J06125822+1758483 Y*O 06 12 58.2208756344 +17 58 48.270601056           ~ 3 0
266 CXOU J061258.4+175906 X 06 12 58.4092864440 +17 59 06.987373152           ~ 1 0
267 CXOU J061258.4+175801 X 06 12 58.41 +17 58 01.3           ~ 1 0
268 CXOU J061258.4+175914 X 06 12 58.4186489664 +17 59 14.789731344           ~ 1 0
269 CXOU J061258.5+175838 X 06 12 58.5389029656 +17 58 38.638414128           ~ 1 0
270 CXOU J061258.5+175920 X 06 12 58.578 +17 59 20.87           ~ 1 0
271 CXOU J061258.8+175851 X 06 12 58.843 +17 58 51.73           ~ 1 0
272 2MASS J06125910+1802423 Y*O 06 12 59.110 +18 02 42.36           ~ 3 0
273 CXOU J061259.0+180447 X 06 12 59.1288982080 +18 04 48.004684788           ~ 1 0
274 CXOU J061259.1+175821 X 06 12 59.13 +17 58 21.4           ~ 1 0
275 CXOU J061259.1+175823 X 06 12 59.152 +17 58 22.72           ~ 1 0
276 CXOU J061259.2+180108 X 06 12 59.2290872688 +18 01 08.770824804           ~ 1 0
277 CXOU J061259.3+175803 X 06 12 59.344 +17 58 03.76           ~ 1 0
278 [AH2005] S255 6 Em* 06 12 59.3920471416 +17 57 21.551528880           ~ 3 0
279 CXOU J061259.4+175802 X 06 12 59.4280872624 +17 58 02.213605416           ~ 1 0
280 2MASS J06125958+1801522 Y*O 06 12 59.583 +18 01 52.21           ~ 3 0
281 2MASS J06125986+1759244 Y*O 06 12 59.862 +17 59 24.43           ~ 1 0
282 CXOU J061300.0+180013 X 06 13 00.0954159288 +18 00 13.559203980           ~ 1 0
283 CXOU J061300.1+175454 X 06 13 00.12 +17 54 55.0           ~ 1 0
284 CXOU J061300.2+180401 * 06 13 00.2351033784 +18 04 01.618200588           ~ 1 0
285 CXOU J061300.5+180059 X 06 13 00.6023718000 +18 00 59.651434476           ~ 1 0
286 CXOU J061300.6+175829 X 06 13 00.667 +17 58 30.48           ~ 1 0
287 CXOU J061300.7+175813 X 06 13 00.7861041744 +17 58 12.894464064           ~ 1 0
288 CXOU J061300.8+180232 X 06 13 00.8205209496 +18 02 32.691574824           ~ 1 0
289 CXOU J061300.8+180127 X 06 13 00.891 +18 01 27.44           ~ 1 0
290 CXOU J061301.0+180139 X 06 13 01.0936416984 +18 01 39.993820896           ~ 1 0
291 CXOU J061301.2+175937 X 06 13 01.215 +17 59 37.35           ~ 1 0
292 CXOU J061301.4+180144 X 06 13 01.4725627536 +18 01 44.542815096           ~ 1 0
293 CXOU J061301.6+175933 X 06 13 01.6272184872 +17 59 33.315862812           ~ 1 0
294 CXOU J061301.8+175756 X 06 13 01.8247237896 +17 57 56.681789076           ~ 1 0
295 CXOU J061301.9+175447 X 06 13 01.937 +17 54 47.33           ~ 1 0
296 2MASS J06130226+1800153 Y*O 06 13 02.2625761800 +18 00 15.358892544           ~ 3 0
297 CXOU J061302.3+175522 X 06 13 02.351 +17 55 22.90           ~ 1 0
298 CXOU J061302.4+175839 X 06 13 02.4637665792 +17 58 39.957451608           ~ 1 0
299 CXOU J061302.6+180020 X 06 13 02.6872186032 +18 00 20.836320696           ~ 1 0
300 2MASS J06130288+1800432 Y*O 06 13 02.8855010328 +18 00 43.169850396           ~ 2 0
301 CXOU J061303.0+175614 X 06 13 03.0496764960 +17 56 14.540142048           ~ 1 0
302 CXOU J061303.0+180208 X 06 13 03.065 +18 02 09.30           ~ 1 0
303 CXOU J061303.0+175441 X 06 13 03.0684157392 +17 54 40.665755916           ~ 1 0
304 CXOU J061303.3+180254 X 06 13 03.306 +18 02 54.82           ~ 1 0
305 2MASS J06130352+1802225 Y*O 06 13 03.5509747488 +18 02 22.547326992           ~ 3 0
306 CXOU J061303.6+180055 X 06 13 03.6863559744 +18 00 56.017686312           ~ 1 0
307 CXOU J061304.0+180136 X 06 13 04.054 +18 01 36.70           ~ 1 0
308 2MASS J06130405+1803317 Y*O 06 13 04.057 +18 03 31.80           ~ 3 0
309 IC 2162 HII 06 13 04.1 +17 58 44           ~ 361 2
310 CXOU J061304.1+180043 X 06 13 04.1497419816 +18 00 43.388376408           ~ 1 0
311 LS 19 Y*O 06 13 04.2112777656 +17 58 41.455593336 12.33 12.50 11.65 11.33   O9.5V 20 0
312 CXOU J061304.2+180115 X 06 13 04.255 +18 01 15.64           ~ 1 0
313 CXOU J061304.3+175739 X 06 13 04.3530146928 +17 57 39.454211448           ~ 1 0
314 CXOU J061304.7+175757 X 06 13 04.7395822056 +17 57 57.664342548           ~ 1 0
315 2MASS J06130475+1755486 Y*O 06 13 04.7575478112 +17 55 48.508610160           ~ 3 0
316 CXOU J061304.8+175729 X 06 13 04.867 +17 57 29.76           ~ 1 0
317 CXOU J061305.6+180648 X 06 13 05.677 +18 06 48.86           ~ 1 0
318 CXOU J061305.8+180007 X 06 13 05.8540445640 +18 00 07.476343344           ~ 1 0
319 CXOU J061306.0+175737 X 06 13 06.0517139688 +17 57 37.427440716           ~ 1 0
320 CXOU J061306.2+175850 X 06 13 06.268 +17 58 50.57           ~ 1 0
321 CXOU J061306.2+175547 * 06 13 06.3021893160 +17 55 47.531716716     14.64     G8 2 0
322 CXOU J061306.3+175857 X 06 13 06.403 +17 58 57.66           ~ 1 0
323 2MASS J06130653+1758543 Y*O 06 13 06.532 +17 58 54.33           ~ 3 0
324 CXOU J061306.7+180106 X 06 13 06.78 +18 01 05.3           ~ 1 0
325 CXOU J061307.2+180235 X 06 13 07.2157337568 +18 02 35.156139756           ~ 1 0
326 CXOU J061307.4+180736 X 06 13 07.52 +18 07 36.3           ~ 1 0
327 CXOU J061307.5+175424 X 06 13 07.5918477576 +17 54 24.622203312           ~ 1 0
328 CXOU J061307.6+175649 X 06 13 07.6505026320 +17 56 49.617266280           ~ 1 0
329 CXOU J061307.6+180316 X 06 13 07.697 +18 03 16.89           ~ 1 0
330 CXOU J061307.7+175628 X 06 13 07.82 +17 56 28.5           ~ 1 0
331 2MASS J06130812+1758535 Y*O 06 13 08.1189220416 +17 58 53.454076392           ~ 3 0
332 CXOU J061308.3+175535 X 06 13 08.3529911256 +17 55 35.045714712           ~ 1 0
333 CXOU J061308.3+175641 * 06 13 08.3601423648 +17 56 41.867534904           ~ 1 0
334 CXOU J061308.4+175238 X 06 13 08.4650772264 +17 52 38.041820292           ~ 1 0
335 CXOU J061308.5+175846 X 06 13 08.509 +17 58 46.61           ~ 1 0
336 CXOU J061308.8+180016 * 06 13 08.8723488408 +18 00 16.913508588           ~ 1 0
337 CXOU J061309.7+175833 X 06 13 09.7357106400 +17 58 33.914166132           ~ 1 0
338 CXOU J061309.8+175614 X 06 13 09.8760707304 +17 56 14.042810976           ~ 1 0
339 CXOU J061310.0+175941 * 06 13 10.0442484192 +17 59 41.676076212           ~ 2 0
340 CXOU J061310.1+175620 X 06 13 10.21 +17 56 20.2           ~ 1 0
341 CXOU J061311.2+175752 X 06 13 11.245 +17 57 52.45           ~ 1 0
342 CXOU J061311.4+175456 X 06 13 11.4505354752 +17 54 56.311345116           ~ 1 0
343 2MASS J06131165+1758485 Y*O 06 13 11.6550246744 +17 58 48.500670360           ~ 3 0
344 CXOU J061312.5+180706 X 06 13 12.59 +18 07 06.5           ~ 1 0
345 CXOU J061312.8+180124 X 06 13 12.832 +18 01 24.28           ~ 1 0
346 2MASS J06131327+1758305 * 06 13 13.2693598824 +17 58 30.530546904           ~ 1 0
347 2MASS J06131429+1753439 Y*O 06 13 14.2964782752 +17 53 43.982954088           ~ 3 0
348 CXOU J061316.0+175416 X 06 13 16.049 +17 54 16.75           ~ 1 0
349 CXOU J061316.4+175537 X 06 13 16.442 +17 55 37.59           ~ 1 0
350 2MASS J06131653+1756066 Y*O 06 13 16.5359739936 +17 56 06.679993236           ~ 3 0
351 CXOU J061316.5+175636 * 06 13 16.5394457256 +17 56 36.488146524           ~ 1 0
352 CXOU J061317.1+175344 X 06 13 17.105 +17 53 45.31           ~ 1 0
353 CXOU J061319.6+175829 X 06 13 19.656 +17 58 29.74           ~ 1 0
354 CXOU J061320.1+175040 X 06 13 20.18 +17 50 40.5           ~ 1 0
355 CXOU J061321.1+175942 X 06 13 21.1797919248 +17 59 42.682596900           ~ 1 0
356 2MASS J06132199+1756314 Y*O 06 13 21.9961203072 +17 56 31.525176624           ~ 3 0
357 CXOU J061322.1+175241 X 06 13 22.124 +17 52 41.18           ~ 1 0
358 CXOU J061322.1+180125 X 06 13 22.139 +18 01 25.76           ~ 1 0
359 2MASS J06132554+1752303 Y*O 06 13 25.547 +17 52 30.40           ~ 3 0
360 2MASS J06132594+1759245 Y*O 06 13 25.9519985112 +17 59 24.409141944           ~ 2 0
361 CXOU J061326.0+175425 X 06 13 26.0870599968 +17 54 25.503518376           ~ 1 0
362 CXOU J061326.2+175342 X 06 13 26.213 +17 53 42.66           ~ 1 0
363 CXOU J061326.6+175906 X 06 13 26.672 +17 59 06.64           ~ 1 0
364 CXOU J061326.7+175504 X 06 13 26.867 +17 55 04.76           ~ 1 0
365 CXOU J061327.4+175554 X 06 13 27.3820115280 +17 55 54.203129760           ~ 1 0
366 2MASS J06132762+1755180 Y*? 06 13 27.6240435408 +17 55 18.077836944           ~ 2 0
367 CXOU J061327.8+180244 X 06 13 27.826 +18 02 44.01           ~ 1 0
368 CXOU J061327.9+180638 X 06 13 27.905 +18 06 38.55           ~ 1 0
369 SH 2-258 HII 06 13 28 +17 55.5           ~ 76 0
370 CXOU J061328.0+180346 X 06 13 28.12 +18 03 47.1           ~ 1 0
371 CXOU J061328.3+175604 X 06 13 28.3711940256 +17 56 04.373265984           ~ 1 0
372 CXOU J061328.9+175539 X 06 13 28.9282144968 +17 55 40.134578592           ~ 1 0
373 2MASS J06132935+1756333 Y*O 06 13 29.3624503056 +17 56 33.380208096           ~ 3 0
374 2MASS J06132998+1756116 Y*O 06 13 29.989 +17 56 11.66           ~ 3 0
375 CXOU J061331.5+180639 X 06 13 31.518 +18 06 39.30           ~ 1 0
376 CXOU J061333.3+180303 X 06 13 33.3513246792 +18 03 02.802023064           ~ 1 0
377 NVSS J061336+170825 Rad 06 13 36.36008547 +17 08 24.9461742           ~ 23 1
378 NAME Car Arm PoG 10 00 -60.0           ~ 439 1
379 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1014 2

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