Table 1: Observed target stars: B- and A-type members of Per OB2 identified by Z99, supplemented with a number of early-type stars identified as members in pre-Hipparcos investigations (e.g., B52). The stars were observed in order of decreasing brightness, resulting in spectra for 29 distinct targets (62 exposures). Columns: (1) HD number (Hipparcos Catalogue field H71); (2) Hipparcos identifier (H1); (3) name; (4) V magnitude (H5); (5) spectral type and luminosity class; (6) number of spectra obtained (N; subtractions refer to suspect exposures related to detector instability); (7) multiplicity (SB: spectroscopic binary; C: Hipparcos component binary - $\rho $ and $\Delta Hp$ in Col. 11; G: Hipparcos acceleration binary; S: Hipparcos suspected non-single - field H61); (8) Hipparcos membership (C: Z99 certain member; P: Z99 possible member; B: Z99 non-member, but B52 member); (9) Hipparcos parallax $\pi $ (H11; mas); (10) Hipparcos parallax error $\sigma _\pi $ (H16; mas); (11) Hipparcos components.
HD HIP Name V SpT+LCl N Mult. Z99 $\pi $ $\sigma _\pi $ Hipparcos components
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)
18830 14207   8.34 A0 3 C C 2.50 1.42 $\rho=0{\hbox{$.\!\!^{\prime\prime}$ }}335, \Delta Hp=2.27$ mag
19216 14450   7.84 B9V 3   P 4.81 1.01  
19567 14713   7.62 B9 2-1   C 4.54 0.96  
20113 15151   7.65 B8 4-1   P 3.43 0.95  
20987 15895   7.87 B2V 2 G C 1.80 1.08  
21483 16203   7.06 B3III 2-1   B 1.60 1.05  
21856 16518   5.91 B1V 1   B 1.99 0.82  
22114 16724   7.60 B8Vp 2-1   P 3.62 0.99  
22951 17313 40 Per 4.97 B0.5V 1 S C 3.53 0.88  
23060 17387   7.51 B2Vp 2   P 2.09 0.93  
23180 17448 o Per 3.84 B1III 3-1 C+SB P 2.21 0.84 $\rho=1{\hbox{$.\!\!^{\prime\prime}$ }}019, \Delta Hp=2.91$ mag
23268 17498   8.22 A0 3   C 3.34 0.99  
23478 17631   6.68 B3IV... 1   B 4.19 1.03  
23597 17698   8.19 B8 3-1   C 2.56 1.01  
23625 17735   6.57 B2.5V 1 C+SB C 2.63 1.00 $\rho=3{\hbox{$.\!\!^{\prime\prime}$ }}349, \Delta Hp=2.58$ mag
23802 17845   7.45 B5Vn 3 C C 3.09 1.21 $\rho=2{\hbox{$.\!\!^{\prime\prime}$ }}240, \Delta Hp=2.32$ mag
24012 17998   7.84 B5 2   C 1.82 1.12  
24131 18081   5.78 B1V 2-2   C 3.15 0.84  
24190 18111   7.43 B2V 2-1 SB C 2.04 1.00  
24398 18246 $\zeta $ Per 2.84 B1Ib 1   C 3.32 0.75  
24583 18390   9.00 B7V 5   P 3.31 1.35  
24640 18434   5.49 B1.5V 1 S P 3.36 0.76  
24970 18621   7.44 A0 3-1   P 4.95 0.99  
25539 19039   6.87 B3V 1   C 4.19 0.97  
25799 19178   7.05 B3V... 2 SB C 2.78 0.95  
25833 19201 AG Per 6.70 B5V:p 1-1 C+SB C 3.89 1.31 $\rho=0{\hbox{$.\!\!^{\prime\prime}$ }}803, \Delta Hp=1.81$ mag
26499 19659   9.06 B9 2   C 4.14 1.30  
278942 17113   9.03 B3III 2 C C 4.83 1.21 $\rho=0{\hbox{$.\!\!^{\prime\prime}$ }}149, \Delta Hp=0.78$ mag
281159 17465   8.51 B5V 2 C P 4.52 3.30 $\rho=0{\hbox{$.\!\!^{\prime\prime}$ }}615, \Delta Hp=0.25$ mag


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