2016A&A...593A...7H

Query : 2016A&A...593A...7H

2016A&A...593A...7H - Astronomy and Astrophysics, volume 593A, 7-7 (2016/9-1)

Gas absorption and dust extinction towards the Orion Nebula Cluster.

HASENBERGER B., FORBRICH J., ALVES J., WOLK S.J., MEINGAST S., GETMAN K.V. and PILLITTERI I.

Abstract (from CDS):

Aims. We characterise the relation between the gas and dust content of the interstellar medium towards young stellar objects in the Orion Nebula Cluster.
Methods. X-ray observations provide estimates of the absorbing equivalent hydrogen column density NH based on spectral fits. Near-infrared extinction values are calculated from intrinsic and observed colour magnitudes (J-H) and (H-Ks) as given by the VISTA Orion A survey. A linear fit of the correlation between column density and extinction values AV yields an estimate of the NH/AV ratio. We investigate systematic uncertainties of the results by describing and (if possible) quantifying the influence of circumstellar material and the adopted extinction law, X-ray models, and elemental abundances on the NH/AV ratio.
Results. Assuming a Galactic extinction law with RV=3.1 and solar abundances by Anders & Grevesse (1989, Geochim. Cosmochim. Acta, 53, 197), we deduce an NH/AV ratio of (1.39±0.14)x1021cm–2mag–1 for Class III sources in the Orion Nebula Cluster where the given error does not include systematic uncertainties. This ratio is consistent with similar studies in other star-forming regions and approximately 31% lower than the Galactic value. We find no obvious trends in the spatial distribution of NH/AV ratios. Changes in the assumed extinction law and elemental abundances are demonstrated to have a relevant impact on deduced AV and NH values, respectively. Large systematic uncertainties associated with metal abundances in the Orion Nebula Cluster represent the primary limitation for the deduction of a definitive NH/AV ratio and the physical interpretation of these results.

Abstract Copyright: © ESO, 2016

Journal keyword(s): dust, extinction - X-rays: ISM - infrared: ISM - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/A+A/593/A7): table1.dat>

Simbad objects: 249

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Number of rows : 249
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 NGC 1333 OpC 03 29 11.3 +31 18 36           ~ 1450 1
2 V* V2005 Ori TT* 05 34 40.8140122056 -05 26 38.648040396 17.967 17.588 16.673   14.014 M1.5 43 0
3 2MASS J05344811-0522385 Y*O 05 34 48.1204598304 -05 22 38.519153400   21.833 20.718   15.808 M3.5 26 0
4 JW 98 Y*O 05 34 48.7702344384 -05 19 07.307613624   19.213 17.926   14.308 M4 41 0
5 V* V772 Ori Or* 05 34 48.8271877944 -05 23 17.905889220 19.244 17.469 16.188   13.032 M1 49 0
6 V* V2045 Ori TT* 05 34 49.5678427248 -05 29 03.332851656 17.236 17.434 16.621 15.43 13.714 M1.5e 46 0
7 V* V2057 Ori TT* 05 34 50.4445324512 -05 20 20.373394416 18.515 16.884 15.740   13.351 K6e 48 0
8 V* V2064 Ori TT* 05 34 52.0176795216 -05 24 18.766810800 19.358 18.744 17.545 16.08 14.190 M3.5 44 0
9 V* V1458 Ori Or* 05 34 52.1713370280 -05 22 31.877081220 18.427 16.614 15.387   12.371 M0+M0 49 0
10 V* V1463 Ori TT* 05 34 54.1889880624 -05 28 54.311312172   20.091 18.642 16.80 14.818 M0 52 0
11 V* V2074 Ori Or* 05 34 55.0137764352 -05 26 58.917913476 18.956 19.848 18.593 17.51 15.572 M5.5e 24 0
12 2MASS J05345506-0525294 Y*O 05 34 55.0569057072 -05 25 29.472252924 20.304 18.496 17.222 15.73 13.833 M3 38 0
13 2MASS J05345560-0529375 TT* 05 34 55.6033896648 -05 29 37.553788104   19.573 18.414 16.88 14.630 M4.5 43 0
14 V* V478 Ori Or* 05 34 55.9757590632 -05 29 26.386366596 18.378 16.779 15.708 14.37 13.069 M1.5 49 1
15 2MASS J05345805-0529405 Y*O 05 34 58.0550172456 -05 29 40.562568456   16.1 20.901 18.85 16.118 M7-M9 27 0
16 2MASS J05345837-0521166 Y*O 05 34 58.3823213160 -05 21 16.670804148   21.500 19.625   15.271 M1.5 30 1
17 V* V1318 Ori TT* 05 34 59.5598480112 -05 24 00.231869304 18.643 18.147 17.015   13.894 M3.2 51 0
18 V* V1477 Ori TT* 05 34 59.6252954184 -05 25 39.995968224 18.695 17.458 16.369 14.94 13.534 M2 63 0
19 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
20 V* V2099 Ori Or* 05 35 00.2172936144 -05 24 09.305982216     19.40 19.03 17.431 M2 24 0
21 V* V1478 Ori TT* 05 35 00.2437574184 -05 18 50.933619360   18.658 17.292   14.117 M0 40 0
22 2MASS J05350132-0518212 Y*O 05 35 01.3231873056 -05 18 21.305547792   15.3 19.464   15.290 M4.3e 25 0
23 V* V1479 Ori Or* 05 35 01.4861108088 -05 28 20.736494832   18.137 16.992 15.74 13.838 M2.5 44 0
24 V* V1319 Ori BY* 05 35 02.0769563955 -05 26 36.207436853 17.698 16.073 14.998 13.84 12.450 M1.5 52 0
25 V* V1320 Ori TT* 05 35 02.18328 -05 29 09.8520   18.570 17.355 15.77 14.183 M2 51 0
26 V* V404 Ori Or* 05 35 03.0920372304 -05 22 37.827748380     19.290   14.073 M6 39 0
27 2MASS J05350343-0526100 Y*O 05 35 03.4328246856 -05 26 10.069705320   15.5 19.577 16.87 15.596 M4.5 27 0
28 V* V405 Ori TT* 05 35 03.5690151032 -05 29 26.042362731 18.273 17.369 16.268 15.03 13.422 M3 43 0
29 V* V1483 Ori Or* 05 35 04.5034067400 -05 26 04.386561684   18.561 17.239 15.43 13.789 M3 43 0
30 2MASS J05350461-0524424 Y*O 05 35 04.6124794800 -05 24 42.466346532   14.3 18.052 17.04 14.450 M2 33 0
31 V* V2143 Ori TT* 05 35 04.7547626880 -05 26 38.036478624 19.198 17.389 16.209 15.02 13.449 M0.5 51 0
32 V* V2152 Ori Or* 05 35 05.4130765632 -05 24 15.096153600     17.33 16.62 15.636 M1.5,M2.5 33 1
33 V* V2154 Ori Or* 05 35 05.4544440312 -05 22 30.491842116         16.344 M6.5 32 0
34 2MASS J05350560-0518248 Y*O 05 35 05.6114838960 -05 18 24.775674228     19.882   15.068 M4.0e 30 0
35 2MASS J05350571-0523540 Y*O 05 35 05.7173089824 -05 23 54.070529676   18.356 17.345   13.665 M5-M6 35 0
36 V* V1484 Ori TT* 05 35 05.7381094296 -05 26 26.187091620   17.531 16.293 14.83 13.212 M3 39 0
37 V* V408 Ori TT* 05 35 05.7672800640 -05 33 55.843330680 18.234 18.283 17.404 15.94 13.849 M3e 57 0
38 V* V2162 Ori Or* 05 35 05.8919332008 -05 27 09.018389160   20.019 18.704 15.67 14.805 K8 43 1
39 V* V2164 Ori Or* 05 35 06.1911156284 -05 22 12.509726208         16.076 M2.5 35 0
40 Parenago 1754 Y*O 05 35 06.5156890752 -05 24 41.412454308 18.115 16.289 15.108 13.87 12.686 M1 53 0
41 V* LN Ori TT* 05 35 08.0222909664 -05 32 44.352503916 16.500 16.211 15.333 14.26 13.239 M0 61 0
42 2MASS J05350825-0529121 Y*O 05 35 08.2574154672 -05 29 12.141456288   20.818 19.758 17.85 15.574 M4.5 23 0
43 V* V2184 Ori Or* 05 35 08.5325966256 -05 25 17.990184828   18.289 16.812 16.45 13.675 M2 43 0
44 2MASS J05350985-0519339 Y*O 05 35 09.8543770656 -05 19 33.949017084   19.276 18.095   13.987 M3.5-M4 39 0
45 V* V2201 Ori Or* 05 35 10.3194688368 -05 21 13.012314084   17.862 17.099   13.851 K7 39 0
46 V* V1487 Ori A * 05 35 10.4918753664 -05 22 45.681747240   15.896 14.820   12.201 M0.5 51 0
47 V* V1487 Ori Or* 05 35 10.50600 -05 22 45.5412           M0.5+M2 53 0
48 2MASS J05351083-0525569 Y*O 05 35 10.8426353808 -05 25 56.979674328         15.637 M6.5 34 0
49 JW 355 Y*O 05 35 10.9042511808 -05 22 46.378450704     16.860   15.005 M2.7e 38 0
50 V* V1488 Ori Or* 05 35 11.1282441120 -05 34 59.668266576   18.681 17.475   13.658 M4.5 40 0
51 [AD95] 3374 Ir* 05 35 11.1555288576 -05 25 32.240588592         16.141 M5 22 0
52 V* V2214 Ori TT* 05 35 11.2145982816 -05 17 20.854048164   19.896 18.492   14.443 M1 49 0
53 JW 367 Y*O 05 35 11.8514609400 -05 17 25.891514412   15.9 20.671   15.874 M3.5 30 0
54 [H97b] 9009 Y*O 05 35 11.9760098664 -05 22 54.153941880     21.38   16.001 ~ 31 0
55 2MASS J05351214-0531388 TT* 05 35 12.1462604784 -05 31 38.817487344 19.716 18.292 17.169 15.68 13.554 M5 59 0
56 V* V1492 Ori TT* 05 35 12.7111613448 -05 16 13.413974700   19.071 17.664   14.156 M3 48 0
57 JW 392 Y*O 05 35 12.7137246792 -05 27 10.609783488     19.245 19.63 14.737 M6.2 41 0
58 2MASS J05351277-0520349 Y*O 05 35 12.7720310712 -05 20 34.891891512   14.6 19.5   15.731 M4.5-M6 40 0
59 JW 395 * 05 35 13.0257686136 -05 22 00.899262840   13.0 18.009   14.840 M2 29 0
60 [HAB84] 13 V* 05 35 13.0496305512 -05 22 15.204600660     17.49   14.084 M4.5 34 0
61 V* V2236 Ori Or* 05 35 13.2147017016 -05 20 52.719088128   19.030 18.269   14.704 K8-M0 33 0
62 V* V2238 Ori Or* 05 35 13.3045554768 -05 20 18.869120484   20.593 18.685   14.142 M2.5 37 0
63 2MASS J05351336-0522261 Y*O 05 35 13.3600510848 -05 22 26.153519736   12.7 18.03   14.302 M4.5-M5.5 36 0
64 V* V1327 Ori BY* 05 35 13.4690594955 -05 17 10.249052010   19.434 17.741   13.827 M1 47 0
65 COUP 552 V* 05 35 13.5195101112 -05 23 04.473742776     20.08   15.678 M3 17 0
66 COUP 553 * 05 35 13.5277154760 -05 23 30.868885248   12.9 16.81     M3 23 0
67 JW 415 Y*O 05 35 13.5306199536 -05 27 28.662818760   18.865 17.505 15.69 13.924 M3 35 0
68 2MASS J05351356-0527573 Y*O 05 35 13.5674663184 -05 27 57.354210216 18.988 19.439 18.313 15.96 14.448 M4.4e 30 0
69 V* V1494 Ori Or* 05 35 13.6105182048 -05 24 25.726027860   13.0 16.406 14.10 13.734 M0.5 35 0
70 COUP 562 * 05 35 13.6164402336 -05 21 21.085429860     18.572   15.473 M3 21 0
71 V* V1495 Ori Or* 05 35 13.6499745384 -05 28 46.401274308   19.310 17.971 16.31 14.134 M2.8e 43 0
72 Parenago 1821 Y*O 05 35 13.7421979800 -05 22 21.972201060 17.886 17.435 16.559   13.422 M2e 41 0
73 [OW94] 141-551 V* 05 35 14.0442579264 -05 25 50.088742284     14.94   14.602 M4.5 24 0
74 Parenago 1823 Y*O 05 35 14.0513648544 -05 23 38.466784464     15.078   12.238 K5 47 0
75 2MASS J05351405-0525203 Y*O 05 35 14.0571952344 -05 25 20.473841712     16.44 15.03 15.054 M6 29 0
76 V* V1328 Ori BY* 05 35 14.2769307624 -05 24 24.668694324 16.297 15.025 13.988 13.13 11.665 K7 65 0
77 Parenago 1843 Y*O 05 35 14.3956325544 -05 23 33.621412344     15.052   12.251 M1 55 0
78 JW 443 Y*? 05 35 14.4566678160 -05 25 02.176642920   13.4 14.91 13.67 13.899 M2 34 0
79 [OW94] 147-302 Y*O 05 35 14.6648362632 -05 23 01.814574804     19.12   14.898 M0.5-M2.5 48 0
80 COUP 673 Ir* 05 35 14.916 -05 24 12.41     18.60 15.82 14.157 ~ 18 0
81 COUP J053515.1-052346 * 05 35 15.1589310072 -05 23 46.661476992           M0-M1 27 0
82 V* V1278 Ori Or* 05 35 15.2038151952 -05 22 24.062782908   16.124 15.222   12.935 K7 43 0
83 V* V2270 Ori Or* 05 35 15.4005412200 -05 21 13.950490572     17.795   14.313 M3.5e 32 0
84 V* V2271 Ori A * 05 35 15.4447435752 -05 17 38.989848300         14.766 M0-1 21 0
85 V* V2271 Ori Or* 05 35 15.45648 -05 17 38.3244           ~ 27 0
86 JW 477 Y*O 05 35 15.4774538832 -05 27 22.752004032   18.995 17.534 16.19 13.951 M2.5 37 0
87 JW 483 TT* 05 35 15.4909184592 -05 35 11.928041808   19.216 17.954   14.329 M2.6e 32 0
88 Brun 590 Y*O 05 35 15.6156771096 -05 24 03.052945404     14.718   12.305 K9 56 0
89 V* V1502 Ori TT* 05 35 15.7171630704 -05 26 28.415314788   18.670 17.516 17.13 14.236 M1.5 46 0
90 V* V1332 Ori BY* 05 35 15.7583826432 -05 21 39.806341992   18.760 17.600   14.299 M3 34 0
91 JW 490 V* 05 35 15.8739807984 -05 20 40.411453884   14.3 19.13   14.624 M5 24 0
92 JW 494 * 05 35 15.8780960160 -05 23 01.925316276   12.3 15.9   13.6 K7 33 0
93 V* MM Ori TT* 05 35 15.9557712336 -05 14 58.923959280 17.909 16.646 15.487   13.099 K6 65 0
94 [OW94] 160-551 Ir* 05 35 16.0386393096 -05 25 51.088415772     15.20 14.21 15.030 M4 22 0
95 COUP 770 Ir* 05 35 16.0944534864 -05 24 11.462261040   12.9 14.57 14.31 14.283 M2 31 0
96 COUP 774 Ir* 05 35 16.190 -05 21 10.90   14.3 20.51   15.595 M5.5 18 1
97 COUP 776 * 05 35 16.1905641000 -05 22 37.462107504     18.99   14.822 M3.5 29 0
98 V* V2284 Ori Or* 05 35 16.1925176712 -05 21 32.340541500   13.2 18.08   14.509 M3e 32 0
99 2MASS J05351624-0528337 Y*O 05 35 16.2513347640 -05 28 33.836559996     18.40 17.07 16.062 M6.5 30 0
100 COUP 782 Y*O 05 35 16.2726 -05 21 09.161     19.65   14.749 M4.5 26 0
101 COUP 796 Y*O 05 35 16.3138575984 -05 20 25.225439820   14.0 18.963   14.885 M5 30 0
102 V* V2288 Ori Or* 05 35 16.3626946488 -05 25 09.695279892   13.2 15.89 15.04 13.79 M1.5 32 0
103 [FRM2016] 306 Y*O 05 35 16.4917096944 -05 22 35.138253720     17.77   14.600 M4 33 0
104 V* V2289 Ori Or* 05 35 16.5812648232 -05 25 17.747778216     14.94 13.80 14.826 M2 23 0
105 V* V2292 Ori Or* 05 35 16.7302959720 -05 20 19.985435916         15.916 M0.5 21 0
106 2MASS J05351671-0522309 Y*O 05 35 16.7360320440 -05 22 31.251330192     18.10   14.820 M4 44 0
107 2MASS J05351678-0516533 Y*O 05 35 16.7863201992 -05 16 53.228600292   21.486 19.853   15.401 M4.5 26 0
108 COUP 842 * 05 35 16.9400 -05 22 20.700     20.87     K7 19 0
109 JW 532 Y*O 05 35 16.9715533106 -05 22 48.569390818 15.882 16.353 16.446   14.777 M0 50 0
110 Parenago 1888 Y*O 05 35 16.9773608616 -05 23 00.966354864   16.348 15.206   12.509 M0 51 0
111 2MASS J05351700-0515443 Y*O 05 35 17.0071154352 -05 15 44.209877904   20.632 19.048   14.516 M4.1e 30 0
112 JW 540 Y*O 05 35 17.1206003568 -05 24 58.681035396   12.9 16.19 14.72 14.213 M5 33 0
113 V* V2302 Ori Or* 05 35 17.2275710976 -05 20 27.729159468   16.987 15.950   13.057 M3 45 0
114 V* V2304 Ori Or* 05 35 17.3682329136 -05 20 14.841093336   19.120 17.744   14.458 M0.5 40 0
115 COUP 879 * 05 35 17.37338 -05 23 04.8794           M4-M6 23 0
116 2MASS J05351754-0525427 Y*O 05 35 17.5491177192 -05 25 42.831239700   17.424 16.192 14.04 13.520 K8 37 2
117 COUP 897 Y*O 05 35 17.55393 -05 21 45.6020     19.21     ~ 18 1
118 COUP 903 * 05 35 17.6547365640 -05 22 07.850166060     20.55   15.807 M5.5e 18 0
119 V* V2311 Ori Or* 05 35 17.6831543760 -05 32 02.442228432 19.615 18.397 17.287 16.02 14.024 M4 39 0
120 COUP 912 Ir* 05 35 17.770 -05 23 42.60         16.430 M3 22 0
121 COUP 913 * 05 35 17.790 -05 23 44.20     19.93   15.369 M5.5 25 0
122 COUP 921 V* 05 35 17.8691415552 -05 23 03.116969016     15.994   13.652 K8 32 0
123 V* V1334 Ori TT* 05 35 17.9209223632 -05 15 32.784838104   19.776 17.995   13.905 M1.7 38 0
124 [H97b] 9204 Ir* 05 35 17.9307714768 -05 25 06.499204428     14.31 12.60 15.513 M0 25 0
125 JW 569 Ir* 05 35 17.9460245928 -05 25 21.228840300   13.3 14.92 13.70 14.641 M3.5 27 0
126 COUP 934 Ir* 05 35 17.9708911944 -05 23 35.409435864     20.93   14.964 M0e 25 0
127 V* V1335 Ori BY* 05 35 17.9834248944 -05 15 38.592327348   19.853 18.466   14.678 K7-M0 30 0
128 V* V2321 Ori Or* 05 35 18.03960 -05 24 02.9304   17.144 17.922   15.061 M4-M5.5e 32 0
129 COUP 943 * 05 35 18.05 -05 24 01.0   17.825 16.845   13.847 M4-M5e 27 0
130 V* V2327 Ori TT* 05 35 18.22776 -05 13 06.8124   20.135 18.098   14.686 M0e 42 0
131 COUP 955 Y*O 05 35 18.2434219200 -05 23 15.619377264   13.2 16.412   13.933 M2 40 0
132 COUP 954 * 05 35 18.2778356016 -05 23 07.412416116     17.383   15.090 M4 29 0
133 2MASS J05351829-0528461 Y*O 05 35 18.2955524496 -05 28 46.273835208   18.324 17.098 15.47 13.835 M2.5e 37 0
134 [OW94] 183-405 Y*O 05 35 18.3314797704 -05 24 04.844128104         14.649 ~ 57 0
135 JW 584 * 05 35 18.3666745416 -05 20 16.447308864   20.057 19.021   14.887 M4.5 20 0
136 2MASS J05351836-0524267 Y*O 05 35 18.3819511272 -05 24 26.707356072     14.68 14.25 14.28 M2.5 42 0
137 MLLA 968 * 05 35 18.3897557112 -05 20 20.337561564   14.5     15.821 K8-M1.5,M1.5-M3,M3-M4 21 0
138 V* V1336 Ori Or* 05 35 18.4704636528 -05 24 07.000386696         13.589 M3e 63 0
139 V* V2336 Ori Or* 05 35 18.7049783856 -05 22 56.846447220     15.466   12.640 K5+M2 44 0
140 V* V490 Ori TT* 05 35 18.8399343360 -05 14 45.494211264 18.882 18.287 17.085   13.716 M3.0e 40 0
141 COUP 1000 Y*O 05 35 18.8756458632 -05 23 28.885408296   13.0 18.84   14.673 M0e 37 0
142 COUP 1001 Y*O 05 35 18.8903359560 -05 24 17.481648060     17.91   15.243 M0 22 0
143 V* V2342 Ori Or* 05 35 18.9503303064 -05 20 52.195709832   14.4 18.536   15.047 K7 34 0
144 COUP 1008 * 05 35 18.9529695792 -05 22 18.750943416     17.416   14.499 K7 32 0
145 Parenago 1928 Y*O 05 35 19.1218298928 -05 23 27.079326240 16.352 16.391 16.138   13.743 K8 46 0
146 MLLA 940 * 05 35 19.146 -05 20 35.77   13.0       M3 11 0
147 V* V2346 Ori Or* 05 35 19.2126676560 -05 31 03.086356368     21.09 18.77 16.521 M6 33 0
148 COUP 1032 * 05 35 19.4650610880 -05 22 21.695712132   14.0 20.99   16.151 M3.5 22 0
149 COUP 1058 Y*O 05 35 19.8405132240 -05 24 47.923080696   12.9 18.78 14.76 14.252 M3.7 36 0
150 V* V1515 Ori Or* 05 35 19.9462851528 -05 33 53.552727648 19.216 17.602 16.458 15.16 13.455 M3.5 47 0
151 V* V2362 Ori Or* 05 35 20.0271454992 -05 29 12.033382524   16.1 20.10 18.33 16.304 M3e,M5e 35 0
152 COUP 1073 * 05 35 20.030 -05 22 26.50   13.5 20.69   15.884 M5 24 0
153 2MASS J05352024-0513593 Y*O 05 35 20.2466289288 -05 13 59.384097264   15.7 20.792   15.161 M4.5 38 0
154 V* V1518 Ori Or* 05 35 20.2804388616 -05 32 16.882326492   20.348 19.411 17.58 15.191 M6 40 0
155 [H97b] 5119 * 05 35 20.3546620776 -05 26 17.450522340     16.75 16.15 16.388 M5.5 24 0
156 COUP 1100 * 05 35 20.3977430736 -05 22 13.636281216   17.885 16.618   13.149 K 36 0
157 V* V2367 Ori Or* 05 35 20.4165539688 -05 17 14.374022964   20.372 18.570   14.272 M1 40 0
158 Parenago 1958 Y*O 05 35 20.7687250008 -05 21 55.104034464   16.813 15.946   13.335 M0 39 0
159 2MASS J05352083-0521300 Y*O 05 35 20.8388453016 -05 21 30.083577840   13.5 18.016   14.260 M4.5 33 0
160 [OW94] 209-322 * 05 35 20.9146722552 -05 23 21.832558008     19.40   15.088 M0 26 0
161 Parenago 1957 Y*O 05 35 20.9295041160 -05 21 50.873490432   17.252 16.243   13.422 K-M1e 26 0
162 V* V1522 Ori Or* 05 35 21.0329706936 -05 28 09.221558052   17.896 16.630 15.12 13.762 K8 48 0
163 2MASS J05352115-0518213 TT* 05 35 21.1567797168 -05 18 21.306030732   20.174 18.774   14.719 M4.0e 32 0
164 V* V2375 Ori Or* 05 35 21.2472285120 -05 22 59.514459096   19.068 18.244   14.850 M3 40 0
165 COUP J053521.3-052411 * 05 35 21.3269340552 -05 24 11.483318664     16.750 13.64 14.114 M0.5 34 0
166 2MASS J05352149-0523165 Y*O 05 35 21.5013981912 -05 23 16.681301448   13.6 19.78   14.736 M3.5 30 0
167 [H97b] 9285 Y*O 05 35 21.6249130992 -05 23 25.758937824     22.17     M5.5 18 0
168 V* V2379 Ori Or* 05 35 21.6286868904 -05 27 14.666330520   16.0 20.619 17.43 16.180 M5.5 30 0
169 V* V1282 Ori Or* 05 35 21.7332755328 -05 26 44.440955376   18.685 17.616 15.77 14.421 M2.7 44 1
170 V* V2383 Ori Or* 05 35 21.7738840776 -05 23 39.313748076   13.0 17.73   14.467 K6 42 0
171 2MASS J05352178-0523106 Y*O 05 35 21.7939444968 -05 23 10.664594700   14.8 18.93   14.418 M1.5 26 0
172 2MASS J05352184-0522082 Y*O 05 35 21.8540053176 -05 22 08.327106372   18.355 17.367   14.430 ~ 37 0
173 V* V494 Ori B * 05 35 21.8841630336 -05 23 55.552338600     17.92   14.455 M1 17 0
174 V* V1281 Ori TT* 05 35 21.9107888352 -05 15 01.051800156   15.5 20.572   15.134 M4 52 0
175 V* V1525 Ori Or* 05 35 22.0660723128 -05 28 15.317995008   18.762 17.745 15.79 14.419 M1 39 0
176 2MASS J05352211-0522340 Y*O 05 35 22.1259773208 -05 22 34.110829416     19.86   15.506 K7 28 0
177 [H97b] 20176 Ir* 05 35 22.1552877048 -05 22 13.435652712     20.28   16.067 M5 22 0
178 V* V2386 Ori TT* 05 35 22.2842562360 -05 31 16.939055784   20.304 19.170 17.35 14.871 M5.5 44 0
179 JW 713 * 05 35 22.4099620776 -05 25 09.522253560   13.1 14.71 14.05 13.608 K3: 29 0
180 V* V2388 Ori Or* 05 35 22.4511572304 -05 22 01.085321640   18.354 17.193   14.127 K2-K4 42 0
181 JW 720 Y*O 05 35 22.4632026408 -05 26 10.947751224   15.0 18.04 17.51 16.689 M2 21 0
182 V* V1527 Ori Or* 05 35 22.5471324720 -05 23 43.716322104   16.607 15.496   13.058 M0 44 0
183 2MASS J05352262-0514112 TT* 05 35 22.6238064480 -05 14 11.222364552   18.453 17.066   13.451 M2.5e 39 0
184 V* V1341 Ori BY* 05 35 22.6692433584 -05 15 08.499995640   15.9     15.528 M2.5 38 0
185 V* V2395 Ori Or* 05 35 22.8009050304 -05 23 13.402249188   14.9 17.89   14.397 K7-M1 28 0
186 V* V1528 Ori TT* 05 35 22.8018752040 -05 31 37.308427788 19.114 18.093 16.932 15.44 13.924 M2 52 0
187 JW 726 * 05 35 22.9710806568 -05 22 41.602273752   14.8 19.24   15.128 K5-K7 33 0
188 V* V2410 Ori Or* 05 35 23.5263270936 -05 18 57.060650520 18.697 17.249 16.040   13.493 M0 45 1
189 2MASS J05352365-0523463 Y*O 05 35 23.6549404200 -05 23 46.327654032   12.9 13.95   14.491 M1 31 0
190 V* V2411 Ori Or* 05 35 23.6625796440 -05 26 27.113463816   18.343 17.269   14.251 M3 31 0
191 JW 741 Y*O 05 35 23.6734629312 -05 24 57.390393240   13.2     14.056 M5 26 0
192 V* V2423 Ori Or* 05 35 24.4375299696 -05 24 39.850507332   15.834 15.162   12.583 M0e 66 1
193 JW 761 Y*O 05 35 24.6615242832 -05 22 42.609631116   16.0 22.33   16.377 M4.5 33 0
194 V* V1400 Ori Or* 05 35 24.6962195976 -05 24 35.734753224   16.946 15.847   13.139 M0e 48 0
195 JW 763 * 05 35 24.6964831200 -05 28 25.539358188   20.866 20.189   16.086 M5 21 0
196 V* V1533 Ori TT* 05 35 25.2414552912 -05 33 21.120769764   20.195 19.060   14.670 M4 40 0
197 V* V496 Ori Or* 05 35 25.4272467432 -05 21 51.581716416   17.890     13.655 M0 41 0
198 MLLA 800B Y*O 05 35 25.4702317824 -05 21 34.374113208     18.438   14.868 ~ 15 0
199 V* V2441 Ori Or* 05 35 25.7181639264 -05 23 09.353560020   14.2 17.149   13.907 K8e 45 0
200 V* V1284 Ori Or* 05 35 25.7337682416 -05 26 41.896602132 18.271 17.808 16.714   13.878 M0 45 0
201 V* V1285 Ori Or* 05 35 26.0088694728 -05 25 47.852020812 19.231 17.700 16.510   13.419 K8 45 0
202 V* V2444 Ori Or* 05 35 26.1633016296 -05 22 57.056680092         16.041 <M3 29 0
203 2MASS J05352640-0516124 Y*O 05 35 26.4074008680 -05 16 12.356473368         16.052 M1.5 30 0
204 JW 797 Y*O 05 35 26.4828883080 -05 17 56.443713612   19.732 18.122   14.350 K6 32 0
205 V* V2459 Ori Or* 05 35 27.0584491128 -05 15 44.666784396   15.0 15.22   14.755 M4.4 42 0
206 V* V1287 Ori Or* 05 35 27.4976027664 -05 27 25.984170576   17.411 16.264   13.263 M3 49 0
207 [AD95] 599 * 05 35 27.6997445688 -05 28 51.531319164     21.123   16.230 M7 21 0
208 V* V1541 Ori Or* 05 35 27.7396354416 -05 18 04.627209204   20.337 19.110   14.831 M1 41 0
209 V* V1542 Ori Or* 05 35 27.8911299432 -05 28 02.208637884   18.131 17.023   13.566 M5 40 0
210 2MASS J05352804-0517202 TT* 05 35 28.0443627792 -05 17 20.214298356   18.551 17.312   13.830 M4 46 1
211 V* V497 Ori Or* 05 35 28.9340684040 -05 16 18.369510312 16.835 16.616 15.593   12.820 M0.25 40 0
212 2MASS J05352934-0525462 TT* 05 35 29.3407308648 -05 25 46.333751844   17.806 16.661   13.275 M4 40 0
213 V* V1289 Ori Or* 05 35 29.4594496824 -05 16 33.380625828 17.829 16.501 15.367   12.803 M0 52 0
214 V* V1290 Ori TT* 05 35 29.5814474904 -05 24 56.932889472   17.057 15.910   13.167 M1 48 0
215 V* V2484 Ori TT* 05 35 29.8510655232 -05 23 55.556094804   17.811 16.796   13.659 M1.5 34 0
216 2MASS J05352986-0523484 Y*O 05 35 29.8648298904 -05 23 48.429754800 17.616 17.751 16.907   13.847 M2e 30 0
217 V* V1554 Ori Or* 05 35 30.2776875792 -05 25 51.697551108   17.854 16.665   13.538 M3.5 36 0
218 V* V1292 Ori Or* 05 35 30.4890761880 -05 28 30.660323556 17.174 17.300 16.527   13.714 M2.5 47 0
219 JW 854 TT* 05 35 30.7046594016 -05 18 07.133281668 20.032 19.361 17.991   14.352 M1.9e 44 0
220 V* V1555 Ori TT* 05 35 30.8019926160 -05 30 36.257535072 18.903 17.860 16.736   13.637 M3.5 50 0
221 2MASS J05353091-0518179 Y*O 05 35 30.9134564376 -05 18 17.930879748 18.936 17.808 16.460   13.093 M3.5 40 0
222 JW 865 Y*O 05 35 30.9641868696 -05 25 44.035244760   19.137 18.001   14.011 M5 35 1
223 2MASS J05353099-0522013 Y*O 05 35 30.9972240720 -05 22 01.329405924     21.627   16.323 K6-K8 26 0
224 TKK 945 Y*? 05 35 31.2067952448 -05 19 32.028865752         16.564 M5.5 21 0
225 [AD95] 765 * 05 35 31.2921669264 -05 27 43.493289948         16.955 M4-M6 13 0
226 V* V1559 Ori TT* 05 35 31.4103733920 -05 28 16.499177652   19.915 19.026   14.804 M5 43 0
227 2MASS J05353156-0516369 Y*O 05 35 31.5632069016 -05 16 36.911734176   20.160 18.827   14.747 M5.6e 33 0
228 V* V2503 Ori Or* 05 35 31.6270304352 -05 16 58.183845276   15.1 19.566   15.313 M3,M3.5 36 0
229 V* V2509 Ori Or* 05 35 31.9970636160 -05 16 20.057325528   18.562 18.027   14.808 K7e 38 0
230 V* V1563 Ori Or* 05 35 32.3434713168 -05 18 07.858204380   17.519 15.999   13.038 K8 40 0
231 2MASS J05353280-0517384 Y*O 05 35 32.8094130192 -05 17 38.427127260   15.4 19.385   15.439 M0-M3 37 0
232 V* NX Ori Or* 05 35 32.8734408048 -05 30 21.461151492 18.535 17.980 16.747   14.052 K6 41 0
233 2MASS J05353311-0517340 Y*O 05 35 33.1134255840 -05 17 34.002121524   19.220 18.100   14.380 M4.4e 37 1
234 2MASS J05353512-0527548 Y*O 05 35 35.1179691864 -05 27 54.874399644   15.5 19.473   15.469 M2.5 24 0
235 2MASS J05353522-0526550 Y*O 05 35 35.2213330512 -05 26 55.047096312 19.478 17.806 16.651   13.641 M3 34 0
236 2MASS J05353570-0520331 Y*O 05 35 35.6982699672 -05 20 33.142086348         16.766 M1 23 0
237 [AD95] 1141 Y*O 05 35 36.5036036736 -05 20 09.320360064     22.041   15.847 M3.5,M5.5-M6 29 0
238 2MASS J05353834-0528346 Y*O 05 35 38.3462407608 -05 28 34.707192096   19.221 17.957   14.461 M3.5 32 1
239 2MASS J05353901-0521017 TT* 05 35 39.0119465568 -05 21 01.823137272   21.187 19.383   15.100 M2.1 35 0
240 2MASS J05353907-0520257 Y*O 05 35 39.0743668248 -05 20 25.775086668   16.0 20.201   15.932 M3 26 0
241 V* OQ Ori TT* 05 35 42.4727210664 -05 27 33.080754924 17.575 16.205 15.153   12.883 K6 48 0
242 V* V2586 Ori TT* 05 35 44.8430131272 -05 24 34.552568772   18.569 17.378   13.695 M4 40 0
243 V* AP Ori Or* 05 35 45.3776468184 -05 28 10.847122788 17.633 16.915 15.822   13.085 M1e 41 0
244 V* V1351 Ori BY* 05 35 45.5675769048 -05 28 23.019793068 19.493 17.706 16.537   13.517 M3 38 0
245 LDN 1641 MoC 05 39.0 -07 00           ~ 479 0
246 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 305 2
247 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 648 0
248 GUM 53 HII 16 40 00.1 -48 51 45           ~ 95 1
249 IRAS 20050+2720 Y*O 20 07 06.549 +27 28 49.10           ~ 106 0

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