SSP-4 Targets and Comparison Stars
Table 1 - SSP-4 Target List
|
Star |
SAO |
Spectral Class |
Var Type |
Period (d) |
Comparison Star, Check Star |
|
44 Boo* |
45357 |
G0Vn |
W Uma |
0.2678 |
SAO 64203, SAO 45337 |
|
Algol |
38592 |
B8V |
EB |
2.867 |
Hamal, SAO 75012 |
|
Beta Lyr |
67451 |
B7Ve |
EB |
12.908 |
Vega, SAO 85397 |
|
Chi Aqr |
146612 |
M3III |
SR |
? |
SAO 145862, SAO 145991 |
|
Del Cep |
34508 |
F5Iab: |
Dcep |
5.3663 |
Deneb, SAO 34395 |
|
Del Sco |
184014 |
B0.2IV |
Be |
? |
SAO 184336, SAO 158840 |
|
Del Ori |
132220 |
O9.5II |
EB |
5.732 |
SAO 112740, SAO 112106 |
|
Eta Car |
238429 |
?var |
SD |
? |
SAO 238574, SAO 251575 |
|
Eps Aur*** |
39955 |
FOIap |
EA |
9898.5 |
Capella, SAO 77168 or SAO 40233, SAO 77168 |
|
Eta Aql |
125159 |
F6Iab: |
Dcep |
7.1766 |
SAO 125235, SAO 124603 |
|
Eta Gem |
78135 |
M3III |
SR |
232.9 |
SAO 78143, SAO 95912 |
|
EV Vir |
158431 |
M3III |
SRB |
120 |
Spica, SAO 138917 |
|
FH Vir |
119843 |
M6III |
SRB |
70 |
Spica, SAO 138917 |
|
IK Tau |
GCVS 780228 |
M6III+ |
M |
465-500d |
SAO 110920, SAO 112106 |
|
IM Peg |
108231 |
K1.5II |
RS CVn |
24.4 |
SAO 108378, SAO 105223 |
|
Omi Cet |
129825 |
M7IIIe |
M |
331.6 |
SAO 110065, SAO 110920 |
|
Mu Gem |
78297 |
M3III |
SR |
? |
SAO 78143, SAO 95912 |
|
Lam Tau* |
93719 |
B3V |
EA |
3.953 |
SAO 112106, SAO 76199 |
|
L2 Pup |
218549 |
M5IIIe |
SRB |
140.8 |
SAO 174391, SAO 173047 |
|
Polaris** |
308 |
F7:Ib-IIvar |
Dcep |
3.9698 |
SAO 38787, Capella SAO 49941, SAO 34395 |
|
R Aqr |
GCVS 40001 |
M7IIIpe |
M |
386.9 |
SAO 191858, SAO 165375 |
|
R Cen |
241580 |
M5IIevar |
M |
546.6 |
SAO 241047, SAO 225054 |
|
R Car |
250614 |
M6.5IIIpevar |
M |
308.7 |
SAO 236808, SAO 220803 |
|
R Leo |
98769 |
M8IIIe |
M |
312.6 |
Regulus, SAO 98709 |
|
R Lyr |
47919 |
M5III |
SRB |
46 |
Vega, SAO 85397 |
|
Rho Cas |
35879 |
G2Ia0e |
S Dor |
N/a |
Alp Cas, Bet Cas |
|
Rho Per |
56138 |
M4II |
SRB |
40 |
Hamal, SAO 74996 |
|
RR Eri |
130157 |
M5III |
SRB |
97 |
SAO 110065, SAO 110920 |
|
S Vir |
GCVS 860002 |
M7IIIe |
M |
377.88 |
Spica, SAO 138917 |
|
SW Vir |
GCVS 860023 |
M7III |
SRB |
150 (4*) |
Spica, SAO 138917 |
|
V2113 Oph |
122279 |
M5III |
SR |
? |
SAO 122671, SAO 142004 |
|
V533 Oph |
141939 |
M |
SR |
32 |
SAO 122671, SAO 142004 |
|
W Cyg |
51079 |
M4III |
SRB |
131.1 |
Vega, SAO 51035 |
|
W Ori |
112406 |
CII |
M |
212 |
SAO 112740, SAO 112106 |
|
X Oph |
GCVS 590007 |
K1III+ |
M |
|
SAO 122671, SAO 142241 |
|
Zet Gem |
79031 |
GOIbvar |
Dcep |
10.1508 |
SAO 78143, SAO 95912 |
Table 1 Notes:
TBD = To Be Determined
Spectral class, variability type, and period are from SIMBAD.
*Faint target (J & H > 3), requires larger telescope, > 0.25m
** Polaris: This is a very small amplitude (< 0.1 mag) D Cep variable. In order to measure this small variation, bright comparison stars have been chosen. When using SAO 38787 as the comparison star, use Capella as the check star. When using SAO 49941 as the comparison star, use SAO 34395 as the check star. These comparison/check star combinations are grouped in the sky to provide year round coverage. For reporting purposes, Polaris is alpha umi (0122+88) in the AAVSO database.
*** For Eps Aur, use Capella as a comparison star for telescopes less than 0.25 m diameter. For telescopes larger than 0.25 m diameter, use SAO 40233 as a comparison star. SAO 77168 is the check star in both instances.
4* The period of SW Vir as measured from the J band photometry appears to be closer to 200 days rather than the previously published 150 days.
Table 2 – Catalog Magnitudes for Comparison Stars in Table 1
|
Star |
Spectral Type |
J |
H |
Source/Note |
|
Alp Cas |
K0IIIa |
0.42 |
-0.19 |
Cat. Of IR Observations |
|
Bet Cas |
F2IV |
1.65 |
1.40 |
Cat. Of IR Observations |
|
Capella |
G4III |
-1.34 |
-1.73 |
Henden |
|
Deneb |
A2Iae |
0.99 |
0.91 |
Henden |
|
Hamal |
K2III |
0.09 |
-0.52 |
Henden |
|
Regulus |
B7V |
1.57 |
1.58 |
UKIRT(J), average of Cat. Of IR Observations for H |
|
SAO 105223 |
K3III |
0.32 |
-0.38 |
Henden |
|
SAO 108378 |
B9III |
2.49 |
2.50 |
UKIRT |
|
SAO 110065 |
K3III |
2.13 |
1.44 |
UKIRT |
|
SAO 110920 |
M1III |
-0.65 |
-1.60 |
UKIRT |
|
SAO 112106 |
F6V |
2.35 |
2.15 |
UKIRT |
|
SAO 112740 |
B2III |
2.17 |
2.23 |
UKIRT |
|
SAO 122671 |
K2III |
0.90 |
0.40 |
Henden |
|
SAO 124603 |
F0IV |
2.70 |
2.55 |
UKIRT |
|
SAO 125235 |
G8IV |
2.19 |
1.72 |
UKIRT |
|
SAO 128694 |
K1II |
1.67 |
1.12 |
UKIRT |
|
SAO 138917 |
F0V |
2.05 |
1.90 |
UKIRT |
|
SAO 142004 |
K0III |
1.75 |
1.27 |
UKIRT |
|
SAO 142241 |
K2III |
1.60 |
1.11 |
UKIRT |
|
SAO 145862 |
G2I |
1.48 |
1.09 |
UKIRT |
|
SAO 145991 |
G8III |
2.61 |
2.12 |
UKIRT |
|
SAO 158840 |
A3IV |
2.50 |
2.45 |
UKIRT |
|
SAO 163481 |
F8V+A0 |
1.45 |
0.98 |
UKIRT |
|
SAO 165375 |
A3V |
3.11 |
3.10 |
UKIRT |
|
SAO 173047 |
F8Iab: |
0.72 |
0.47 |
See note 2 |
|
SAO 174391 |
K5III |
1.64 |
0.89 |
See note 2 |
|
SAO 184336 |
B2III |
2.49 |
2.44 |
UKIRT |
|
SAO 191858 |
K0III |
2.06 |
1.48 |
UKIRT |
|
SAO 220803 |
K2III |
1.80 |
1.27 |
See note 2 |
|
SAO 225054 |
K3III |
2.91 |
2.18 |
See note 2 |
|
SAO 236808 |
A8Ib |
1.67 |
1.58 |
See note 2 |
|
SAO 238574 |
K1III |
2.11 |
1.66 |
See note 2 |
|
SAO 241047 |
B1III |
2.79 |
2.91 |
See note 2 |
|
SAO 251575 |
A7III |
3.30 |
3.25 |
See note 2 |
|
SAO 34395 |
G8III |
2.61 |
2.12 |
UKIRT |
|
SAO 38787 |
F5I |
0.87 |
0.62 |
Henden |
|
SAO 40233 |
G2IV |
3.63 |
3.33 |
UKIRT |
|
SAO 45337 |
G8III |
1.89 |
1.43 |
UKIRT |
|
SAO 51035 |
G8III |
2.55 |
2.08 |
Cat. Of IR Observations |
|
SAO 64203 |
A7III |
2.65 |
2.58 |
UKIRT |
|
SAO 74996 |
F6IV |
2.52 |
2.25 |
J from Cat. Of IR Observations, H from J-K (see note 1) |
|
SAO 75012 |
A5V |
2.50 |
2.43 |
Cat. Of IR Observations |
|
SAO 76199 |
B7IIIe |
2.93 |
2.94 |
UKIRT |
|
SAO 77168 |
B7III |
1.65 |
1.96 |
UKIRT |
|
SAO 78143 |
G8III |
2.59 |
2.08 |
UKIRT |
|
SAO 85397 |
G5IV |
2.15 |
1.81 |
UKIRT |
|
SAO 95912 |
AOIV |
1.90 |
1.88 |
UKIRT |
|
Spica |
B1III |
1.51 |
1.58 |
UKIRT |
|
Vega |
AOV |
0.00 |
0.00 |
Henden |
Table 2notes:
- A linear relationship exists between J-H and J-K. This formula is based on the 52 J,H, and K standard stars in Henden's list. (J-H) = 0.8292 (J-K) + 0.0031, R^2 = 0.9943.
- Magnitudes are based on SAAO standard star magnitudes (Carter) that have been transformed to the UKIRT system via transformations found in Carpenter's paper. Assume and error of +/- 0.05 for both J and H magnitudes.
References:
Catalogue of Infrared Observations, Edition 5 (Gezari+ 1999), catalog II/225
IR Photometry of Selected Bright Stars (UKIRT)
Dr. Arne Henden's list of J and H standard stars
J.M. Carpenter, "Color Transformations for the 2MASS Second Incremental Data Release", The Astronomical Journal, 121: 2851-2871, 2001 May.
B.S. Carter, "Southern JHKL Standards", Mon. Not. R. astr. Soc. (1990) 242, 1-5
31 July 2006 revision