High polarisation standards
This catalogue can be loaded to the TCS by typing read-cat hpol.cat in the TCS terminal.
Name
TCSTGT |
RA (2000) |
DEC (2000) |
V |
B-V |
Sp. Type |
P (%) |
angle |
Nobs |
Ref. |
New measurements |
BD +64 106
BDp64106
|
00 57 36.71 |
64 51 26.5 |
10.34 |
+0.69 |
B1 V |
U: 5.110 ± 0.104
B: 5.506 ± 0.090
V: 5.687 ± 0.037
R: 5.150 ± 0.098
I: 4.696 ± 0.052 |
97.04 ± 0.58
97.15 ± 0.47
96.63 ± 0.18
96.74 ± 0.54
96.89 ± 0.32 |
2
2
2
2
2 |
1. & 4. |
|
BD +59 389
BDp59389
|
02 02 42.06 |
60 15 26.5 |
9.07 |
+1.01 |
F0 Ib |
U: 5.772 ± 0.051
B: 6.345 ± 0.035
V: 6.701 ± 0.015
R: 6.430 ± 0.022
I: 5.797 ± 0.023 |
98.22 ± 0.26
98.14 ± 0.16
98.09 ± 0.07
98.14 ± 0.10
98.26 ± 0.11 |
4
4
4
4
4 |
1. & 4. |
|
HD 19820
HD19820
|
03 14 05.35 |
59 33 47.7 |
7.11 |
+0.51 |
O9 IV |
U: 4.218 ± 0.022
B: 4.699 ± 0.036
V: 4.787 ± 0.028
R: 4.562 ± 0.025
I: 4.081 ± 0.024 |
115.57 ± 0.15
115.70 ± 0.22
114.93 ± 0.17
114.46 ± 0.16
114.48 ± 0.17 |
3
3
3
3
3 |
1. & 4. |
|
HD 25443
HD25443
|
04 06 08.07 |
62 06 07.0 |
6.78 |
+0.29 |
B0 III |
U: 4.930 ± 0.062
B: 5.232 ± 0.092
V: 5.127 ± 0.061
R: 4.734 ± 0.045
I: 4.249 ± 0.041 |
134.55 ± 0.36
134.28 ± 0.51
134.23 ± 0.34
133.65 ± 0.28
134.21 ± 0.28 |
1
1
1
1
1 |
1. & 4. |
|
BD +25 727
BDp25727
|
04 44 24.90 |
25 31 42.7 |
9.50 |
+0.72 |
A2 III |
V: 4.27 ± 0.012 |
33.8 |
1 |
4. |
Variable? |
HD 251204
HD251204 |
06 05 05.67 |
23 23 38.9 |
10.28 |
+0.28 |
B0 IV |
V: 4.04 ± 0.066 |
147 |
1 |
< 4. |
Variable? |
HD 160529
HD160529
|
17 41 58.95 |
-33 30 16.3 |
6.67 |
1.28 |
A2 Ia |
U: 6.31 ± 0.13
B: 6.97 ± 0.03
V: 7.31 ± 0.04
R: 7.04 ± 0.01
"I": 6.53 ± 0.03 |
20.3 ± 0.2
20.1 ± 0.1
20.4 ± 0.1
20.8 ± 0.1
21.3 ± 0.1 |
3
4
10
6
5 |
2. |
|
HD 161056
HD161056
|
17 43 47.03 |
-07 04 46.2 |
6.32 |
|
B1.5 V |
U: 3.191 ± 0.040
B: 3.799 ± 0.055
V: 4.030 ± 0.025
R: 4.012 ± 0.032
I: 3.575 ± 0.030 |
66.50 ± 0.51
66.56 ± 0.42
66.93 ± 0.18
67.33 ± 0.23
67.78 ± 0.24 |
3
3
3
3
3 |
1. |
High precision BVR measurements in
Piirola et al. 2020 (Tab. 2) |
Hiltner960
Hiltner960
|
20 23 28.53 |
39 20 59.1 |
10.62 |
|
B0 V |
U: 5.459 ± 0.078
B: 5.720 ± 0.061
V: 5.663 ± 0.021
R: 5.210 ± 0.029
I: 4.455 ± 0.030 |
56.13 ± 0.41
55.06 ± 0.31
54.79 ± 0.11
54.54 ± 0.16
53.96 ± 0.19 |
5
5
5
5
5 |
1. |
V~14 companion at 6'' NW.
Possibly variable, dP < 0.05 %. |
VI Cyg #12
VICyg12
|
20 32 40.94 |
41 14 26.2 |
11.5 |
|
B5 Ia |
V: 8.947 ± 0.088
R: 7.893 ± 0.037
|
115.03 ± 0.28
116.23 ± 0.14 |
-
- |
1. |
|
HD 204827
HD204827
|
21 28 57.70 |
58 44 24.0 |
7.93 |
+0.82 |
B0 V |
U: 5.548 ± 0.037
B: 5.648 ± 0.022
V: 5.322 ± 0.014
R: 4.893 ± 0.029
I: 4.186 ± 0.030 |
57.57 ± 0.18
58.20 ± 0.11
58.73 ± 0.08
59.10 ± 0.17
59.94 ± 0.20 |
4
4
4
4
4 |
1. & 4. |
High precision BVR measurements in
Piirola et al. 2020 (Tab. 2) |
Finding charts from the Digital Sky Survey are obtained by clicking on the star names. These have North up and East left, are centred on the star, and the field size is 6.5 arc minutes (ALFOSC field without(!) calcite plate in the beam). The column called angle refers to the equatorial position angle, which is measured from north and eastwards.
References
- Schmidt, G.D., Elston, R., Lupie, O.L., 1992: The Hubble Space
Telescope Northern-Hemisphere Grid of Stellar Polarimetric Standards,
1992 AJ 104, 1563
(ps file).
- Hsu, J.-C., Breger, M., 1982: On standard polarized stars,
1982 ApJ 262, 732
(ps file).
- Clemens, D.P., Tapia, S., 1990: Toward selection of
intermediate-magnitude polarization standards, 1990 PASP 102, 179.
- Turnshek, D.A., Bohlin, R.C., Williamson, R.L.,II, Lupie, O.L., Koorneef, J., 1990: An atlas of Hubble Space Telescope photometric, spectrophotometric,and polarimetric calibration objects, 1990 AJ 99, 1243.
- Dolan, J.F., Tapia, S., 1986, Wavelength dependence of position angle in polarization standards, 1986 PASP 98, 792.
- Piirola, V., Kosenkov, I.A., Berdyugin, A.V., Berdyugina, S.V., Poutanen, J., 2020: DIPol-UF: Simultaneous Three-Color (BVR) Polarimeter with EM CCDs,
To be published in AJ, 2020
Additional standard stars
- Blinov, D, et al. 2023 The RoboPol sample of optical polarimetric standards ,
2023, A&A 677, 144
The visibility plot of today:
Minimum observing altitude when lower hatch closed: 35 degrees. 
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