Mount Hamilton Observing Information
Polarimetry Standards
The stars listed below are strongly polarized and useful for polarimetry calibration.

Star RA2000 DEC2000 V Mag. Sp. Pol. (%) PA(deg) Ref.
BD+64d106 00 57 36.7 +64 51 27 10.3 B1V 5.69+-0.04 96.6+-0.2 Sch92
HD 7927 01 20 04.9 +58 13 54 5.0 F0Ia 3.32+-0.04 92.1+-0.2 Wol96
BD+59d389 02 02 42.1 +60 15 27 9.1 F0Ib 6.70+-0.2 98.1+-0.1 Sch92
HD 19820 03 14 05.4 +59 33 48 7.1 O9IV 4.82+-0.03 115.4+-0.3 Wol96
HD 25443 04 06 08.1 +62 06 07 6.8 B0III 5.15+-0.03 135.1+-0.2 Wol96
HD 251204 06 05 05.7 +23 23 39 10.3 B0IV 4.04+-0.07 147. Tur90
HD 43384 06 16 58.7 +23 44 27 6.3 B3Ib 2.94+-0.04 169.8+-0.7 Hsu82
HD 154445 17 05 32.2 -00 53 32 5.6 B1V 3.67+-0.05 88.6+-0.7 Wol96
HD 155197 17 10 15.6 -04 50 03 9.2 A0 4.38+-0.03 103.2 Tur90
HD 161056 17 43 47.0 -07 04 46 6.3 B1.5V 4.00+-0.01 66.3+-0.3 Wol96
Hiltner 960 20 23 28.4 +39 20 56 10.6 B0V 5.66+-0.02 54.8+-0.1 Sch92
VI Cyg #12 20 32 40.9 +41 14 26 11.5 B5Ia 8.95+-0.09 115.0+-0.3 Sch92
HD 204827 21 28 57.7 +58 44 24 7.9 B0V 5.34+-0.02 58.7+-0.4 Wol96

Unpolarized Standard Stars (V-band data, except for Tur90)
Star RA2000 DEC2000 Mag. Sp. Pol. (%) PA(deg) Ref.
Beta Cas 00 09 10.7 +59 08 59 2.3 F2III 0.04+-0.02 72.5 Sch92
HD 12021 01 57 56.1 -02 05 58 8.9 B7 0.08+-0.02 160.1 Sch92
HD 14069 02 16 45,2 +07 41 11 9.0 A0 0.02+-0.02 156.6 Sch92
HD 21447 03 30 00.2 +55 27 07 5.1 A1IV 0.05+-0.02 171.5 Sch92
G191B2B 05 05 30.6 +52 49 54 11.8 DA1 0.06+-0.04 147.7 Sch92
HD 94851 10 56 44.2 -20 39 52 9.2 B9 0.06+-0.02(B) --- Tur90
GD 319 12 50 04.5 +55 06 03 12.3 DA 0.09+-0.09 140.2 Sch90
Gamma Boo 14 32 04.7 +38 18 30 3.0 A7III 0.07+-0.02 21.3 Sch92
HD 154892 17 07 41.4 +15 12 38 8.0 F8V 0.05+-0.03(B) --- Tur90
BD+32d3739 20 12 02.1 +32 47 44 9.3 A6V 0.03+-0.02 35.8 Sch92
BD+28d4211 21 51 11.1 +28 51 52 10.5 Op 0.05+-0.03 54.2 Sch92
HD 212311 22 21 58.6 +56 31 53 8.1 A0V 0.03+-0.02 51.0 Sch92
Zeta Peg 22 41 27.7 +10 49 53 3.4 B8III 0.05+-0.02 40.0 Sch92

References

Hsu82: Hsu & Breger (1982; ApJ, 262, 732),

Sch92: Schmidt, Elston, & Lupie, (1992; AJ, 104, 1563),

Tur90: Turnshek, et al. (1990; AJ, 99, 1243), and

Wol96: Wolff, Nordsieck, & Nook (1996; AJ, 111, 856).