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Table A.1.

Stellar population of Westerlund 1.

ID RA (J2000) Dec (J2000) B V R I Spectral type Notes
W1 16 46 59.28 −45 50 46.7 21.9 18.37 16.09 13.65 O9.5 Iab
W2a 16 46 59.71 −45 50 51.1 20.4 16.69 14.23 11.73 B2 Ia RV binary?(2), Hα variable(5)
W4 16 47 01.42 −45 50 37.1 18.7 14.47 11.80 9.15 F3 Ia+
W5 16 47 02.97 −45 50 19.5 21.4 17.49 14.98 12.48 WN10-11h/B0.5 Ia+ WR S, stripped primary(9)
W6a 16 47 03.04 −45 50 23.6 22.2 18.41 15.80 13.16 B0.5 Iab P(2.20d)(1), Hα variable(5)
W6b 16 47 02.93 −45 50 22.3 23.6 20.20 17.91 15.25 O9.5 III
W7 16 47 03.62 −45 50 14.2 20.0 15.57 12.73 9.99 B5 Ia+ Hα variable, Pulsator?(5)
W8a 16 47 04.79 −45 50 24.9 19.9 15.50 12.64 9.89 F8 Ia+
W8b 16 47 04.95 −45 50 26.7 − − − − B1.5 Ia Pulsator?(5)
W9 16 47 04.14 −45 50 31.1 21.8 17.47 14.47 11.74 sgB[e] Interacting binary(8)
W10 16 47 03.32 −45 50 34.7 − − − − B0.5 I+OB SB2
W11 16 47 02.23 −45 50 47.0 21.2 17.15 14.52 11.91 B2 Ia
W12a 16 47 02.21 −45 50 58.8 22.0 16.94 13.54 10.42 F1 Ia+
W13 16 47 06.45 −45 50 26.0 21.1 17.19 14.63 12.06 B0.5 Ia++OB E(9.27d)(1, 3)
W14c 16 47 06.07 −45 50 22.6 − − − − WN5o WR R
W15 16 47 06.63 −45 50 29.7 22.8 18.96 16.38 13.75 O9 Ib
W16a 16 47 06.61 −45 50 42.1 20.5 15.89 12.82 9.90 A5 Ia+ Hα variable(5)
W17 16 47 06.25 −45 50 49.2 22.7 18.87 16.19 13.56 O9 Iab
W18 16 47 05.71 −45 50 50.5 21.2 17.32 14.81 12.27 B0.5 Ia
W19 16 47 04.86 −45 50 59.1 22.6 18.22 15.21 12.37 B1 Ia Hα variable(5)
W20 16 47 03.09 −45 52 18.8 − − − − M5 Ia
W21 16 47 01.10 −45 51 13.6 22.5 18.41 15.56 12.74 B0.5 Ia Pulsator?(5)
W23a 16 47 02.57 −45 51 08.7 22.1 17.85 14.91 12.07 B2 Ia+B I? Hα variable, Pulsator?(5)
W24 16 47 02.15 −45 51 12.4 23.0 18.71 15.96 13.24 O9 Iab Pulsator?(5)
W25 16 47 05.78 −45 50 33.3 21.9 17.85 15.22 12.61 O9 Iab
W26 16 47 05.40 −45 50 36.5 22.1 16.79 12.63 9.19 M2↔5 Ia Spec. variable(5)
W27 16 47 05.15 −45 50 41.3 21.5 17.94 15.35 12.80 O7-8 Ia+ Merger remnant?(10)
W28 16 47 04.66 −45 50 38.4 20.9 16.87 14.26 11.64 B2 Ia Hα variable(5)
W29 16 47 04.41 −45 50 39.8 22.6 18.66 16.02 13.38 O9 Ib
W30 16 47 04.11 −45 50 39.0 22.4 18.45 15.80 13.20 O4-5 Ia+ RV binary?(10) Hα variable(5)
W31 16 47 03.78 −45 50 40.4 − − − − B0 I+OB
W32 16 47 03.67 −45 50 43.5 − − − − F5 Ia+
W33 16 47 04.12 −45 50 48.3 20.0 15.61 12.78 10.04 B5 Ia+ Hα variable(5)
W34 16 47 04.39 −45 50 47.2 22.1 18.15 15.40 12.69 B0 Ia
W35 16 47 04.20 −45 50 53.5 22.7 18.59 16.00 13.31 O9 Iab
W36 16 47 05.04 −45 50 55.3 22.8 18.89 16.09 13.38 OB Ia + OB Ia E(3.18d)(1), SB2(7), very broad Pa lines
W37 16 47 06.01 −45 50 47.4 22.8 19.11 16.40 13.65 O9 Ib
W38 16 47 02.86 −45 50 46.0 23.2 19.10 16.47 13.81 O9 Iab
W41 16 47 02.70 −45 50 56.9 21.3 17.87 15.39 12.78 O9 Iab
W42a 16 47 03.25 −45 50 52.1 − − − − B9 Ia+ Hα variable, Pulsator?(5)
W43a 16 47 03.54 −45 50 57.3 22.8 18.05 15.22 12.26 B0 Ia RV(16.27d)(4), SB1, Hα variable(5)
W43b 16 47 03.52 −45 50 56.5 − − − − B1 Ia
W43c 16 47 03.76 −45 50 58.3 20.4 18.35 16.18 13.66 O9 Ib
W44 16 47 04.20 −45 51 06.9 22.6 18.86 15.61 12.52 WN9h: WR L, RV binary?(5)
W46a 16 47 03.91 −45 51 19.5 23.0 18.55 15.46 12.46 B1 Ia
W46b 16 47 03.61 −45 51 20.0 − − − − O9.5 Ib
W47 16 47 02.64 −45 51 17.6 22.7 19.95 16.36 13.68 O9.5 Iab
W49 16 47 01.90 −45 50 31.5 22.6 18.76 16.30 13.80 B0 Iab
W50b 16 47 01.17 −45 50 26.7 22.8 19.66 17.21 14.69 O9 III
W52 16 47 01.84 −45 51 29.2 21.8 17.48 14.68 11.94 B1.5 Ia P(6.7d)(1)
W53 16 47 00.48 −45 51 32.0 22.9 18.51 15.80 13.13 OB Ia + OB Ia P(1.30d)(1), SB2, very broad Pa lines
W54 16 47 03.06 −45 51 30.5 − − − − B0.5 Iab
W55 16 46 58.40 −45 51 31.2 21.6 17.67 15.25 12.67 B0 Ia
W56a 16 46 58.93 −45 51 48.8 21.7 17.46 14.81 12.15 B1.5 Ia
W56b 16 46 58.85 −45 51 45.8 22.8 18.88 16.36 13.76 O9.5 Ib
W57a 16 47 01.35 −45 51 45.6 20.7 16.54 13.83 11.13 B4 Ia Pulsator?(5)
W57c 16 47 01.59 −45 51 45.5 − − − − WN7o WR P
W60 16 47 04.13 −45 51 52.1 22.8 18.50 15.96 13.28 B0 Iab
W61a 16 47 02.29 −45 51 41.6 21.2 17.16 14.62 12.01 B0.5 Ia Hα variable(5)
W61b 16 47 02.56 −45 51 41.6 22.7 18.59 16.00 13.31 O9.5 Iab
W62a 16 47 02.51 −45 51 37.9 − − − − B0.5 Ib
W63a 16 47 03.39 −45 51 57.7 22.6 18.56 16.20 13.68 B0 Iab
W65 16 47 03.89 −45 51 46.3 22.9 18.73 16.27 13.68 O9 Ib
W66 16 47 03.96 −45 51 37.5 − 19.79 16.85 13.96 WC9d WR M
W70 16 47 09.36 −45 50 49.6 21.2 16.88 14.10 11.29 B3 Ia Hα variable(5)
W71 16 47 08.44 −45 50 49.3 21.5 17.01 14.06 11.16 B2.5 Ia Hα variable, Pulsator?(5)
W72 16 47 08.32 −45 50 45.5 − 19.69 16.59 13.68 WN7b WR A, P(7.63d)(1)
W74 16 47 07.08 −45 50 13.1 − − − − O9.5 Iab
W75 16 47 08.93 −45 49 58.4 − − − − M4 Ia
W78 16 47 01.54 −45 49 57.8 21.0 17.06 14.54 12.04 B1 Ia Pulsator?(5)
W84 16 46 59.03 −45 50 28.2 21.3 17.82 15.60 13.63 O9.5 Ib
W86 16 46 57.15 −45 50 09.9 22.9 18.76 16.43 14.00 O9.5 Ib
W228b 16 46 58.05 −45 53 01.0 − − − − O9 Ib
W232 16 47 01.41 −45 52 34.9 21.3 17.53 15.25 12.85 B0 Iab
W237 16 47 03.09 −45 52 18.8 22.8 17.49 13.00 9.19 M3 Ia Spec. variable(5)
W238 16 47 04.41 −45 52 27.6 21.4 17.47 14.98 12.45 B1 Iab
W239 16 47 05.21 −45 52 25.0 21.7 17.86 15.39 12.90 WC9d WR F, RV(5.05d)(6), SB1
W241 16 47 06.06 −45 52 08.3 − − − − WC9 WR E, RV binary?(2)
W243 16 47 07.55 −45 52 28.5 − − − − LBV Spec. variable, pulsator(2)
W265 16 47 06.26 −45 49 23.7 22.0 17.05 13.62 10.54 F1↔5 Ia+ Spec. variable(5), pulsator(3)
W373 16 46 57.71 −45 53 20.1 − − − − B0 Iab
WR B 16 47 05.36 −45 51 05.0 − 20.99 17.50 14.37 WN7o E(3.51d)1, SB1
WR C 16 47 04.40 −45 51 03.8 − − − − WC9d
WR D 16 47 06.24 −45 51 26.5 − − − − WN7o
WR G 16 47 04.01 −45 51 25.2 22.7 20.87 17.75 14.68 WN7o
WR H 16 47 04.22 −45 51 20.2 − − − − WC9d
WR I 16 47 00.88 −45 51 20.8 − − − − WN8o
WR J 16 47 02.47 −45 51 00.1 − − − − WN5h
WR K 16 47 03.25 −45 50 43.8 − − − − WC8
WR N 16 46 59.9 −45 55 26 − − 16.90 13.00 WC9d
WR O 16 47 07.66 −45 52 35.9 − − − − WN6o
WR Q 16 46 55.55 −45 51 35.0 − 20.30 17.50 14.70 WN6o
WR T 16 46 46.3 −45 47 58 − − − − WC9d
WR U 16 47 06.55 −45 50 39.0 − − − − WN6o
WR V 16 47 03.81 −45 50 38.8 − − − − WN8o
WR W 16 47 07.58 −45 49 22.2 − − − − WN6h
WR X 16 47 14.1 −45 48 32 − − − − WN5o
1001 16 46 49.20 −45 53 10.0 − − − − O+O? very Pa broad lines
1002 16 46 49.68 −45 52 53.0 − 18.89 16.59 14.41 O9-9.5 II+O? P(0.144d)1, broad Pa lines
1003 16 46 52.32 −45 52 03.4 − − − − O9-9.5 bin? broad Pa lines
1004 16 46 53.52 −45 53 00.2 − 18.06 16.60 14.43 OeBe star
1005 16 46 54.24 −45 51 54.7 23.6 18.93 16.08 13.26 B0 Iab W3002
1006 16 46 54.48 −45 53 30.1 − − 17.41 14.98 O9-9.5 III bin? P(0.127d)1, broad Pa lines
1007 16 46 54.96 −45 50 06.0 − − − − O9-9.5 III
1008 16 46 55.44 −45 51 54.4 23.1 19.73 17.11 14.40 O9.5 II
1009 16 46 55.92 −45 51 41.4 22.9 19.07 16.74 14.08 B0 Ib W2002
1010 16 46 55.92 −45 52 10.2 − − − − O+O? very broad Pa lines
1011 16 46 56.86 −45 52 04.4 22.5 19.14 17.10 14.79 O+O? very broad Pa lines
1012 16 46 56.95 −45 50 56.0 23.8 20.36 17.78 14.97 O9-9.5 III bin? broad Pa lines
1013 16 46 57.60 −45 52 30.7 − − − − O+O? very Pa broad lines
1014 16 46 57.81 −45 51 19.8 23.3 19.58 17.40 15.03 O9-9.5 III bin? broad Pa, Hα/He I double?
1015 16 46 57.96 −45 51 40.7 23.1 19.24 16.77 14.17 O9 III
1016 16 46 58.08 −45 52 46.9 − − − − O9-9.5 III bin? broad Pa lines
1017 16 46 58.23 −45 50 33.9 23.5 19.91 17.44 14.94 O9-9.5 III bin? broad Pa lines
1018 16 46 58.32 −45 50 56.8 − − − − O9.5 Iab CXO164658.2-455056
1019 16 46 58.36 −45 51 48.8 23.8 20.33 17.86 15.32 O9-9.5 III bin? broad Pa lines
1020 16 46 58.48 −45 52 27.1 21.8 18.45 16.38 14.19 O9-9.5+O? broad Pa lines
1021 16 46 58.78 −45 54 31.9 − 20.31 17.38 14.82 O9-9.5III bin P(4.45d), SB2, broad Pa lines
1022 16 46 59.93 −45 50 25.4 23.0 19.48 17.08 14.82 O9.5 II P(0.1703d)(1)
1023 16 47 00.24 −45 51 10.4 − − − − O9 III
1024 16 47 00.72 −45 51 01.8 23.3 19.38 16.72 14.04 O9.5 Iab W2011
1025 16 47 00.76 −45 52 04.6 22.9 19.91 17.65 15.26 O+O? very broad Pa lines
1026 16 47 00.96 −45 49 48.7 − − − − O9-9.5 III
1027 16 47 00.96 −45 50 06.7 − − − − O9.5 Iab CXO164701.0-455006
1028 16 47 01.32 −45 51 38.2 23.9 20.76 17.98 15.29 O9-9.5 III bin? broad Pa lines, Hα/He I double?
1029 16 47 01.44 −45 49 50.2 − − − − O9-9.5 III bin? broad Pa lines
1030 16 47 01.69 −45 52 57.8 − − 15.39 12.97 O9.5 Iab W3005
1031 16 47 01.92 −45 50 56.4 − − − − O9 III
1032 16 47 02.27 −45 50 17.6 24.0 21.18 18.01 15.38 O9-9.5 III bin? broad Pa lines, Hα/He I double?
1033 16 47 02.40 −45 52 34.3 22.6 18.96 16.43 13.81 O9-9.5 I-III C07-X5, skewed lines?
1034 16 47 02.52 −45 51 48.2 22.5 18.69 16.34 13.85 O9.5 Iab
1035 16 47 02.64 −45 51 51.1 23.5 19.56 17.15 14.54 O9-9.5 III bin? broad Pa lines
1036 16 47 02.77 −45 52 12.4 23.5 19.29 16.69 14.09 O9.5 Iab C07-X4, W2017
1037 16 47 02.84 −45 50 06.3 24.0 19.62 17.00 14.41 O9.5 II
1038 16 47 03.60 −45 48 57.2 − − − − O9 III
1039 16 47 03.60 −45 49 21.7 − − − − B1 Ia W3019
1040 16 47 04.52 −45 50 08.8 21.9 18.89 16.37 13.76 O9-9.5 I-III bin? W2019, C07-X3, broad Pa lines
1041 16 47 04.56 −45 51 09.4 − − − − O9.5 Iab bin? CXO164704.4-455109, broad Pa lines
1042 16 47 04.56 −45 52 06.6 22.8 19.17 16.80 14.27 O9.5 II
1043 16 47 04.57 −45 50 59.3 23.3 20.17 17.39 14.53 O9.5 II-III
1044 16 47 05.56 −45 49 51.5 24.1 20.28 17.85 15.36 O9-9.5 III bin? broad Pa lines, Hα infilled?
1045 16 47 05.82 −45 51 54.9 23.2 19.77 17.20 14.49 O9.5 II
1046 16 47 06.00 −45 49 56.9 22.5 18.87 16.59 14.19 O+O? very Pa broad lines, He I double?
1047 16 47 06.11 −45 52 32.1 22.1 18.93 16.58 14.03 O9.5 II
1048 16 47 06.26 −45 51 03.9 23.8 20.50 16.47 13.80 B1.5 Ia P(5.2d)(1)
1049 16 47 06.65 −45 47 38.5 22.1 17.70 14.81 12.05 B1-2 Ia+
1050 16 47 06.77 −45 49 55.3 23.1 19.52 16.97 14.44 O9.5 II
1051 16 47 06.96 −45 49 40.1 − − 16.70 13.94 O9 III
1052 16 47 06.96 −45 52 55.9 − − − − O9 III
1053 16 47 07.44 −45 48 50.0 − − − − B0 Ib
1054 16 47 07.68 −45 51 41.0 − − − − O9-9.5 bin? broad Pa lines
1055 16 47 07.92 −45 51 47.9 − − 16.94 13.94 B0 Ib (+O?) W3024, broad Pa lines
1056 16 47 08.64 −45 51 01.4 24.2 20.54 17.31 14.30 O9.5 II
1057 16 47 08.67 −45 50 47.1 23.3 19.39 16.60 13.71 O9.5-B0 Iab W2028, Hα infilled, C II em.
1058 16 47 08.88 −45 51 24.5 − − − − O9 III
1059 16 47 09.12 −45 53 20.8 − − − − O9 III?
1060 16 47 09.18 −45 50 48.3 23.3 20.09 17.09 14.31 O9.5 II
1061 16 47 09.74 −45 50 40.2 23.9 20.91 18.16 15.42 O9-9.5 III bin? broad Pa lines
1062 16 47 10.62 −45 50 46.4 23.6 20.03 17.48 14.90 O+O? very broad Pa lines
1063 16 47 10.80 −45 49 47.6 − − − − O9 III
1064 16 47 11.52 −45 49 59.5 − − − − O9.5 Iab CXO164711.5-455000
1065 16 47 11.60 −45 49 22.4 23.1 19.08 16.19 13.28 B0 Ib W3003, RV(11.12d)(4), SB1
1066 16 47 12.72 −45 50 55.3 − − − − O9 III
1067 16 47 13.39 −45 49 10.5 23.2 18.93 15.88 12.98 B0 Iab W3004
1068 16 47 16.56 −45 51 41.0 − − − − B0Ib blended
1069 16 47 24.24 −45 53 29.0 − − − − B5 Ia+

Notes. Compilation of stellar classifications for members of Westerlund 1. Column 1 lists the primary optical identifier for the sources and columns 2 and 3 their co-ordinates. Columns 4–7 present B-, V-, R- and I-band photometry derived from the dataset described in Clark et al. (2005) and, if not available, Bonanos (2007; italics). Column 8 presents the spectral classification and where appropriate, column 9 presents other designations (including the W2xxx and W3xxx designations previously employed but superceded by this work) and notes regarding spectral appearance and variability, with Eclipsing (E) and Periodic (P) photometric variables and Radial Velocity (RV) spectroscopic variables listed with their relevant periods. The vast majority of classifications derive from this work, Clark et al. (2005), Crowther et al. (2006a), and Negueruela et al. (2010), with exceptions highlighted. References. Additional data used in the construction of this table from (1)Bonanos (2007), (2)Ritchie et al. (2009a), (3)Ritchie et al. (2010), (4)Ritchie et al. (2011), (5)Clark et al. (2010), (6)Clark (2011)(7)Koumpia & Bonanos (2012), (8)Clark et al. (2013)(9)Clark et al. (2014b) and (10)Clark et al. (2019a).

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