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Table 6

Temperature estimations for Var C. Depending on the value of (BV)0 Eqs. (2)–(4), or (5) was used.

E(BV) = 0.10 E(BV) = 0.17 E(BV) = 0.24 Observatory/
Date B V (BV)0 T/K (BV)0 T/K (BV)0 T/K T/K Reference

Aug. 1963 16.74 16.36 0.28 7306 0.21 7723 0.14 8291 7800±500 TLS plate
Sept. 1963 16.01 15.75 0.16 8098 0.09 8792 0.02 9546 8800±700 TLS plate
Sept. 1976 17.12 17.17 –0.15 14 541 –0.22 20 743 –0.29 29 591 21 600±8000 1
Oct. 1977 16.98 16.98 –0.10 11 282 –0.17 16 095 –0.24 22 959 16 800±6200 2
Nov. 1980 17.20 17.21 –0.11 11 870 –0.18 16 932 –0.25 24 155 17 700±6500 3
Dec. 1981 17.33 17.23 0.00 9772 –0.07 9689 –0.14 13 822 11 100±2700 3
Aug. 1982 17.24 17.15 –0.01 7146 –0.08 10 193 –0.15 14 541 10 600±3900 3
Oct. 1982 16.57 16.48 –0.01 7146 –0.08 10 193 –0.15 14 541 10 600±3900 3
Sept./Oct. 1986 16.43 16.35 –0.02 7518 –0.09 10 724 –0.16 15 298 11 200±4100 4
Nov. 1986 16.12 15.75 0.27 7364 0.20 7784 0.13 8389 7800±500 5
Sept. 1987 16.12 15.68 0.34 6967 0.27 7364 0.20 7784 7400±400 5
Aug./Oct. 1988 16.51 16.39 0.02 9546 –0.05 8754 –0.12 12 488 10 300±2200 6
Sept. 1992 16.30 16.11 0.09 8792 0.02 9546 –0.05 8754 9000±500 7
Dec. 1992 16.54 16.34 0.10 8690 0.03 9434 –0.04 8321 8800±600 7
Jan. 1993 16.39 16.21 0.08 8896 0.01 9658 –0.06 9210 9300±400 7
Sept. 1996 17.15 16.18 0.87 5139 0.80 5326 0.73 5520 5300±200 DIRECT
Oct. 1996 17.25 16.81 0.34 6967 0.27 7364 0.20 7784 7400±400 DIRECT
Aug. 1997 17.82 16.90 0.82 5272 0.75 5464 0.68 5663 5500±200 DIRECT
Sept. 1997 17.59 16.87 0.62 5839 0.55 6052 0.48 6236 6000±200 DIRECT
Oct. 1997 17.80 16.79 0.91 5035 0.84 5218 0.77 5408 5200±200 DIRECT
Aug. 1998 17.80 17.23 0.47 6285 0.40 6644 0.33 7022 6700±400 DIRECT
Nov. 1998 18.04 17.90 0.04 9324 –0.03 7909 –0.10 11 282 9500±1800 DIRECT
Oct. 1999 17.20 17.08 0.02 9546 –0.05 8754 –0.12 12 488 10 300±2200 8
Nov. 1999 17.18 17.07 0.01 9658 –0.06 9210 –0.13 13 138 10 700±2500 8
Oct. 2000 16.65 16.53 0.02 9546 –0.05 8754 –0.12 12 488 10 300±2200 NOAO
Sept. 2001 16.45 16.33 0.02 9546 –0.05 8754 –0.12 12 488 10 300±2200 NOAO
Aug. 2002 16.67 15.83 0.74 5492 0.67 5692 0.60 5899 5700±200 WIYN
Sept. 2002 16.94 15.88 0.96 4908 0.89 5087 0.82 5272 5100±200 WIYN
Oct. 2002 16.43 15.86 0.47 6285 0.40 6644 0.33 7022 6700±400 WIYN
Nov. 2002 16.27 15.84 0.33 7022 0.26 7423 0.19 7818 7400±400 WIYN
Jan. 2003 17.05 15.81 1.14 4476 1.07 4639 1.00 4808 4600±200 WIYN
Sept. 2003 16.51 15.87 0.54 6083 0.47 6285 0.40 6644 6300±300 WIYN
Oct. 2003 16.50 15.56 0.84 5218 0.77 5408 0.70 5605 5400±200 WIYN
Nov. 2003 16.34 15.87 0.37 6803 0.30 7191 0.23 7601 7200±400 WIYN
Dec. 2003 16.80 15.74 0.96 4908 0.89 5087 0.82 5272 5100±200 WIYN
Dec. 2004 16.50 16.40 0.00 9772 –0.07 9689 –0.14 13 822 11 100±2700 9
Jul. 2005 16.90 16.26 0.54 6083 0.47 6285 0.40 6644 6300±300 WIYN
Sept. 2005 16.60 16.60 –0.10 11 282 –0.17 16 095 –0.24 22 959 16 800±6200 9
Oct. 2007 16.81 16.86 –0.15 14 541 –0.22 20 743 –0.29 29 591 21 600±8000 CoSAI
Oct. 2007 17.02 16.94 –0.02 7518 –0.09 10 724 –0.16 15 298 11 200±4100 TLS CCD
Jan. 2008 17.17 17.08 –0.01 7146 –0.08 10 193 –0.15 14 541 10 600±3900 TLS CCD
Oct. 2008 17.15 17.07 –0.02 7518 –0.09 10 724 –0.16 15 298 11 200±4100 TLS CCD
Jan. 2009 17.19 17.10 –0.01 7146 –0.08 10 193 –0.15 14 541 10 600±3900 TLS CCD
Feb. 2009 17.25 17.20 –0.05 8754 –0.12 12 488 –0.19 17 814 13 000±4800 TLS CCD
Oct. 2009 17.53 17.47 –0.04 8321 –0.11 11 870 –0.18 16 932 12 400±4600 TLS CCD
Nov. 2009 17.23 16.86 0.27 7364 0.20 7784 0.13 8389 7900±500 CoSAI
Feb. 2010 17.53 17.51 –0.08 10 193 –0.15 14 541 –0.22 20 743 15 200±5600 TLS CCD
Feb. 2011 16.40 16.21 0.09 8792 0.02 9546 –0.05 8754 9000±500 TLS CCD
Aug. 2011 16.13 15.81 0.22 7662 0.15 8194 0.08 8896 8300±600 TLS CCD
Sept. 2011 15.98 15.79 0.09 8792 0.02 9546 –0.05 8754 9000±500 TLS CCD
Oct. 2011 16.06 15.81 0.15 8194 0.08 8896 0.01 9658 8900±700 TLS CCD
Sep. 2013 15.87 15.66 0.11 8588 0.04 9324 –0.03 7909 8600±700 10
Nov. 2013 15.9 15.7 0.1 8690 0.03 9434 –0.04 8321 8800±600 11

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