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Table A.1.

Identifications, J2016.0 coordinates, G and B magnitudes, along with the GBP − GRP color index of the initial B0 sample from Cygnus OB2.

2MASS Identifier GAIA DR3 Identifier Alternative Name RA [hh mm ss] DEC [° ′ ″] B mag. G mag. GBP − GRP Source
J20325904+4117589 2067784723027769728 Schulte 43 20 32 59.03 +41 17 58.93 17.46 14.96 2.27 [1]
J20325976+4114196 2067782837540661248 Schulte 40 20 32 59.75 +41 14 19.63 17.13 13.95 2.63 [1]
J20332563+4115247 2067783524735406336 Schulte 67 20 33 25.63 +41 15 24.75 17.22 14.24 2.40 [1]
J20323949+4052475 2067768195993175936 [CPR2002] A31 20 32 39.50 +40 52 47.38 15.20 12.07 2.74 [4]
J20323498+4052390 2067768372090380800 [CPR2002] A33 20 32 34.98 +40 52 38.87 15.83 12.50 2.61 [7]
J20331869+4059378 2067759056302388992 [CPR2002] B15 20 33 18.70 +40 59 37.79 15.69 12.41 2.53 [6]
J20330661+4121131 2067784967844456192 ALS 15165 20 33 06.61 +41 21 13.06 15.97 13.22 2.29 [3]
J20294666+4105083 2067810183593068160 ALS 19636 20 29 46.67 +41 05 08.27 13.74 11.49 1.93 [7]
J20305112+4120218 2067842756625081856 ALS 15171 20 30 51.11 +41 20 21.70 16.66 13.05 2.77 [3]
- 2067781944187448704 ALS 15161 20 33 10.40 +41 13 05.93 16.00 15.83 1.49 [3]
J20334234+4111456 2067779779523905792 ALS 15160 20 33 42.34 +41 11 45.47 15.71 12.83 2.37 [3]
J20331050+4122224 2067785375864885888 ALS 15132 20 33 10.50 +41 22 22.35 14.54 12.15 2.08 [5]
J20331859+4124493 2067879354045188992 ALS 15180 20 33 18.58 +41 24 49.28 16.29 13.97 2.33 [3]
J20321312+4127243 2067835682818358400 Cyg OB2 4B 20 32 13.12 +41 27 24.33 13.08 11.28 1.62 [3]
J20321568+4046170 2067743976676134784 - 20 32 15.68 +40 46 16.92 15.75 12.59 2.51 [7]
J20330526+4143367 2067934394049131520 ALS 15130 20 33 05.26 +41 43 36.69 14.43 11.99 2.15 [5]
J20272099+4121261 2067691195819277056 Schulte 25 20 27 21.00 +41 21 26.06 14.65 12.07 2.07 [6]
J20282772+4104018 2067625195062093312 - 20 28 27.72 +41 04 01.73 14.97 12.12 2.32 [7]
J20332099+4135518 2067929862860202752 ALS 15177 20 33 20.99 +41 35 51.76 16.51 13.29 2.55 [3]
J20295701+4109538 2067816681882846464 ALS 19634 20 29 57.01 +41 09 53.76 13.04 11.69 2.02 [2]
J20331106+4110321 2067778783091509888 ALS 15181 20 33 11.06 +41 10 31.96 16.97 13.41 2.70 [3]
J20281547+4038196 2067421304373639552 ALS 11369 20 28 15.47 +40 38 19.74 10.66 9.51 1.14 [6]
J20315898+4107314 2067821664044745984 GSC 03157-01377 20 31 58.98 +41 07 31.31 16.34 12.97 2.58 [6]
J20331129+4042338 2067751604537938688 Cyg OB2-22A 20 33 11.30 +40 42 33.67 16.41 12.49 2.97 [7]
J20331740+4112387 2067780397999213952 ALS 15169 20 33 17.40 +41 12 38.65 16.34 13.26 2.50 [3]
J20335925+4105380 2067766276146708608 ALS 15147 20 33 59.25 +41 05 38.02 15.30 12.70 2.19 [5]
J20312210+4112029 2067826332670106112 Cyg OB2-A30 20 31 22.10 +41 12 02.82 15.23 12.30 2.31 [6]
J20292449+4052597 2067429168454304896 - 20 29 24.49 +40 52 59.75 14.81 11.85 2.38 [7]
J20322774+4128522 2067837263366481536 ALS 11410 20 32 27.73 +41 28 52.18 12.01 10.98 1.38 [2]
J20305552+4054541 2067795752502969472 [CPR2002] A35 20 30 55.51 +40 54 53.95 14.78 12.02 2.26 [7]
J20314341+4100021 2067797195612486656 - 20 31 43.41 +41 00 02.00 16.84 13.17 2.74 [6]
J20314605+4043246 2067742877164542080 [CPR2002] A44 20 31 46.05 +40 43 24.58 14.48 11.67 2.29 [7]

Notes. The B magnitudes are compiled from multiple studies (see last column for reference); for those stars with no B data available, we estimated their magnitudes using Johnson-Cousins relationships with Gaia photometry (Riello et al. 2021).

References. [1] Massey & Thompson (1991), [2] Høg et al. (2000), [3] Reed (2003), [4] Monet et al. (2003), [5] Wolff et al. (2007), [6] Zacharias et al. (2012), [7] Gaia Collaboration (2016), Riello et al. (2021), Gaia Collaboration (2023).

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