Comparison Stars Used for Differential Photometry

Explanation of the Columns for the Table of Comparison Stars

Object Comp Star V σ(V) R σ(R) Reference
(1) (2) (3) (4) (5) (6) (7)
3C 66A A 13.65 0.02 13.36 0.01 Smith & Balonek (1998)







AO 0235+164 4 13.04 0.01 12.68 0.03 Gonzalez-Perez, et al. (2001)

8 15.03 0.01 14.20 0.01 Gonzalez-Perez, et al. (2001)

2 12.72 0.01 12.14 0.01 Gonzalez-Perez, et al. (2001)







CTA 26 A 14.48 0.05 13.96 0.04 Smith & Balonek (1998)

B 12.92 0.02 12.59 0.03 Smith & Balonek (1998)







PKS 0420-014 2 13.10 0.02 12.80 0.02 Smith & Balonek (1998)







PKS 0528+134 12 16.23 0.01 15.48 0.01 Gonzalez-Perez, et al. (2001)

15 15.79 0.01 15.14 0.01 Gonzalez-Perez, et al. (2001)

25 13.26 0.01 12.83 0.04 Gonzalez-Perez, et al. (2001)







S5 0716+714 10 11.46 0.01 11.12 0.01 Villata, et al. (1998)

11 13.55 0.02 13.18 0.01 Villata, et al. (1998)







PKS 0735+178 A 13.40 0.04 13.14 0.05 Smith et al. (1985)







PKS 0736+01 1 12.41 0.04 11.68 0.04 Smith et al. (1985)

2 15.37 0.07 14.97 0.08 Smith et al. (1985)







OJ 248 2 14.71 0.02 14.46 0.03 Raiteri, et al. (1998)

5 15.76 0.03 15.40 0.02 Raiteri, et al. (1998)







OJ 287 4 14.19 0.01 13.71 0.01 Gonzalez-Perez, et al. (2001)

1 13.99 0.01 13.64 0.01 Gonzalez-Perez, et al. (2001)







Mrk 421 1 14.36 0.02 14.04 0.02 Villata, et al. (1998)

2 15.57 0.05 15.20 0.03 Villata, et al. (1998)

3 15.77 0.03 15.24 0.03 Villata, et al. (1998)







Ton 599 13 15.36 0.04 14.97 0.04 Smith et al. (1985)

2 13.31 0.01 12.94 0.01 Gonzalez-Perez, et al. (2001)







ON 325 B 14.96 0.04 14.59 0.04 Fiorucci & Tosti (1996)

C1 16.50 0.14 16.21 0.11 Fiorucci & Tosti (1996)







H 1219+305 A 12.47 0.01 12.11 0.01 Smith, et al. (1991)

B 14.01 0.01 13.61 0.01 Smith, et al. (1991)







W Com A 12.08 0.04 11.72 0.04 Fiorucci & Tosti (1996)

D 14.81 0.04 13.86 0.04 Fiorucci & Tosti (1996)







PKS 1222+216 1 14.19 0.04 13.84 0.03 Raiteri, et al. (1998)







3C 273 C 11.87 0.04 11.30 0.04 Smith et al. (1985)

D 12.68 0.04 12.31 0.04 Smith et al. (1985)







3C 279 1 12.40 0.01 12.03 0.01 Gonzalez-Perez, et al. (2001)

2 12.99 0.03 12.55 0.04 Smith & Balonek (1998)

5 15.95 0.01 15.44 0.01 Gonzalez-Perez, et al. (2001)







H 1426+428 A 14.16 0.01 13.23 0.02 Smith, et al. (1991)

B 14.61 0.01 14.17 0.02 Smith, et al. (1991)







PKS 1510-08 1 11.60 0.03 11.23 0.03 Smith & Balonek (1998)

4 14.66 0.01 14.25 0.01 Gonzalez-Perez, et al. (2001)







3C 345 A 13.86 0.05 13.44 0.03 Smith et al. (1985)

D 15.25 0.01 15.77 0.01 Gonzalez-Perez, et al. (2001); Star 4

E 15.23 0.01 14.47 0.01 Gonzalez-Perez, et al. (2001); Star 19







B2 1633+382 A 14.26 0.01 13.84 0.01 Jorstad (2010; private communication)







Mrk 501 A 12.61 0.01 12.11 0.01 Smith, et al. (1991)







1ES 1959+650 2 12.86 0.02 12.53 0.02 Villata, et al. (1998)







PKS 2155-304 2 12.04 0.01 11.64 0.01 Smith, et al. (1991)

3 12.97 0.01 12.46 0.01 Smith, et al. (1991)







BL Lac B 12.94 0.01 11.96 0.02 Gonzalez-Perez, et al. (2001)

C 14.28 0.01 13.75 0.01 Gonzalez-Perez, et al. (2001)







CTA 102 1 13.98 0.03 13.56 0.04 Raiteri, et al. (1998)

2 14.88 0.03 14.07 0.07 Raiteri, et al. (1998)







3C 454.3 3 14.40 0.01 13.95 0.01 Gonzalez-Perez, et al. (2001)

4 13.83 0.03 13.23 0.02 Smith & Balonek (1998)

8 13.62 0.03 13.10 0.03 Smith & Balonek (1998)







1ES 2344+514 A 12.61 0.04 12.25 0.04 Fiorucci et al. (1998)

Explanation of the Columns for the Table of Comparison Stars