Table 6: Observational details, IR photometry.
Date MJD J H K $L^{\prime}$ Telescope
Sep. 06, 1987 47044.5 9.37 $\pm$ 0.03 9.26 $\pm$ 0.03 9.09 $\pm$ 0.03 9.0 $\pm$ 0.4 TCS
Sep. 11, 1987 47049.5 9.70 $\pm$ 0.04 9.48 $\pm$ 0.04 9.28 $\pm$ 0.04   TCS
Nov. 24, 1987 47123.5 9.16 $\pm$ 0.03 9.08 $\pm$ 0.03 8.92 $\pm$ 0.03 8.71 $\pm$ 0.06 UKIRT
Dec. 28, 1987 47157.5 9.26 $\pm$ 0.03 9.16 $\pm$ 0.03 9.06 $\pm$ 0.03   TCS
Jan. 01, 1988 47161.5 9.28 $\pm$ 0.04 9.10 $\pm$ 0.04 8.99 $\pm$ 0.04 8.8 $\pm$ 0.4 TCS
Jan. 03, 1988 47163.5 9.24 $\pm$ 0.03 9.08 $\pm$ 0.03 8.97 $\pm$ 0.03 8.8 $\pm$ 0.3 TCS
Jun. 23, 1988 47335.5 9.28 $\pm$ 0.04 9.17 $\pm$ 0.04 9.01 $\pm$ 0.04   TCS
Jun. 24, 1988 47336.5 9.25 $\pm$ 0.03 9.15 $\pm$ 0.03 8.98 $\pm$ 0.03   TCS
Jun. 28, 1988 47340.5 9.16 $\pm$ 0.04 9.11 $\pm$ 0.04 9.00 $\pm$ 0.04   TCS
Apr. 14, 1991 48360.5 9.25 $\pm$ 0.02 9.12 $\pm$ 0.03 9.05 $\pm$ 0.02   TCS
Apr. 17, 1991 48363.5 9.26 $\pm$ 0.06 9.12 $\pm$ 0.03 9.03 $\pm$ 0.02   TCS
Aug. 23, 1991 48491.5 9.22 $\pm$ 0.03 9.08 $\pm$ 0.02 9.01 $\pm$ 0.02   TCS
Aug. 24, 1991 48492.5 9.16 $\pm$ 0.09 9.04 $\pm$ 0.05 9.00 $\pm$ 0.05   TCS
Aug. 25, 1991 48493.5 9.18 $\pm$ 0.04 9.05 $\pm$ 0.03 8.95 $\pm$ 0.03   TCS
Aug. 27, 1991 48495.5 9.17 $\pm$ 0.03 9.06 $\pm$ 0.02 9.00 $\pm$ 0.03   TCS
Aug. 28, 1991 48496.5 9.19 $\pm$ 0.04 9.05 $\pm$ 0.03 8.98 $\pm$ 0.05   TCS
Nov. 29, 1991 48589.5 9.30 $\pm$ 0.10 9.10 $\pm$ 0.10 9.00 $\pm$ 0.10   TCS
Dec. 01, 1991 48591.5 9.24 $\pm$ 0.05 9.08 $\pm$ 0.04 9.01 $\pm$ 0.04   TCS
Jul. 20, 1992 48823.5 9.22 $\pm$ 0.03 9.11 $\pm$ 0.03 8.98 $\pm$ 0.05   TCS
Aug. 04, 1992 48838.5 9.33 $\pm$ 0.09 9.09 $\pm$ 0.04 8.93 $\pm$ 0.05   TCS
Aug. 21, 1992 48855.5 9.29 $\pm$ 0.04 9.07 $\pm$ 0.03 9.03 $\pm$ 0.06   TCS
Aug. 21, 1992 48855.5 9.25 $\pm$ 0.05 9.07 $\pm$ 0.03 8.94 $\pm$ 0.06   TCS
Aug. 22, 1992 48856.5 9.14 $\pm$ 0.06 9.04 $\pm$ 0.04 9.07 $\pm$ 0.04   TCS
Aug. 23, 1992 48857.5 9.29 $\pm$ 0.07 9.16 $\pm$ 0.09 9.11 $\pm$ 0.06   TCS
Jan. 12, 1993 48999.5 9.20 $\pm$ 0.03 9.07 $\pm$ 0.01 8.98 $\pm$ 0.02   TCS
Jun. 22, 1993 49160.5 9.23 $\pm$ 0.01 9.17 $\pm$ 0.01 9.09 $\pm$ 0.01 8.91 $\pm$ 0.03 UKIRT
Jun. 30, 1993 49169.5 9.27 $\pm$ 0.03 9.14 $\pm$ 0.02 9.02 $\pm$ 0.02 8.9 $\pm$ 0.3 UKIRT
Ju.l 06, 1993 49175.5 9.26 $\pm$ 0.02 9.14 $\pm$ 0.03 9.03 $\pm$ 0.02 8.9 $\pm$ 0.2 UKIRT
Jul. 07, 1993 49176.5 9.26 $\pm$ 0.03 9.15 $\pm$ 0.02 9.05 $\pm$ 0.03   UKIRT
Dec. 20, 1993 49341.5 9.11 $\pm$ 0.01 9.11 $\pm$ 0.01 8.95 $\pm$ 0.02   TCS
Dec. 20, 1993 49341.5 9.11 $\pm$ 0.01 9.08 $\pm$ 0.01 8.93 $\pm$ 0.01   TCS
Dec. 20, 1993 49341.5 9.18 $\pm$ 0.03 9.06 $\pm$ 0.01 8.99 $\pm$ 0.06   TCS
Dec. 21, 1993 49342.5 9.26 $\pm$ 0.02 9.18 $\pm$ 0.01 9.09 $\pm$ 0.03   TCS
Dec. 21, 1993 49342.5 9.27 $\pm$ 0.03 9.13 $\pm$ 0.01 9.13 $\pm$ 0.01   TCS
Jun. 08, 1994 49511.5 9.16 $\pm$ 0.02 9.16 $\pm$ 0.01 9.01 $\pm$ 0.01   TCS
Jun. 09, 1994 49512.5 9.28 $\pm$ 0.01 9.13 $\pm$ 0.02 9.06 $\pm$ 0.03   TCS
Jun. 10, 1994 49513.5 9.16 $\pm$ 0.03 9.07 $\pm$ 0.01 9.04 $\pm$ 0.03   TCS
Jun. 11, 1994 49514.5 9.24 $\pm$ 0.06 9.28 $\pm$ 0.04 9.17 $\pm$ 0.05   TCS
Jun. 21, 1994 49524.5 9.22 $\pm$ 0.01 9.12 $\pm$ 0.01 9.03 $\pm$ 0.01   TCS
Jun. 26, 1994 49529.5 9.22 $\pm$ 0.02 9.14 $\pm$ 0.01 9.06 $\pm$ 0.03   TCS
Jun. 28, 1994 49531.5 9.22 $\pm$ 0.01 9.15 $\pm$ 0.01 9.03 $\pm$ 0.01   TCS
Jun. 30, 1994 49533.5 9.24 $\pm$ 0.01 9.09 $\pm$ 0.02 9.08 $\pm$ 0.02   TCS
Jul. 01, 1994 49534.5 9.17 $\pm$ 0.01 9.12 $\pm$ 0.01 8.99 $\pm$ 0.00   TCS
Jul. 02, 1994 49535.5 9.26 $\pm$ 0.02 9.20 $\pm$ 0.01 9.09 $\pm$ 0.01   TCS
Jul. 03, 1994 49536.5 9.27 $\pm$ 0.02 9.17 $\pm$ 0.01 9.12 $\pm$ 0.01   TCS
Nov. 05, 1994 49661.5 9.16 $\pm$ 0.01 9.09 $\pm$ 0.01 9.06 $\pm$ 0.01   TCS
Nov. 06, 1994 49662.5 9.01 $\pm$ 0.01 8.94 $\pm$ 0.01 8.90 $\pm$ 0.01   TCS
Nov. 07, 1994 49663.5 9.28 $\pm$ 0.02 9.21 $\pm$ 0.01 9.14 $\pm$ 0.02   TCS
Nov. 08, 1994 49664.5 9.29 $\pm$ 0.02 9.18 $\pm$ 0.01 9.08 $\pm$ 0.00   TCS
Nov. 09, 1994 49665.5 9.21 $\pm$ 0.01 9.11 $\pm$ 0.01 9.08 $\pm$ 0.01   TCS
Jan. 02, 1995 49719.5 9.23 $\pm$ 0.01 9.15 $\pm$ 0.01 9.03 $\pm$ 0.01   TCS
Jan. 03, 1995 49720.5 9.12 $\pm$ 0.01 9.07 $\pm$ 0.01 9.00 $\pm$ 0.01   TCS
Jan. 05, 1995 49722.5 9.14 $\pm$ 0.02 9.09 $\pm$ 0.01 8.99 $\pm$ 0.01   TCS
Apr. 24, 1995 49831.5 9.16 $\pm$ 0.01 9.07 $\pm$ 0.01 9.02 $\pm$ 0.02   TCS
Apr. 25, 1995 49832.5 9.21 $\pm$ 0.01 9.12 $\pm$ 0.01 9.07 $\pm$ 0.00   TCS
Apr. 26, 1995 49833.5 9.25 $\pm$ 0.01 9.13 $\pm$ 0.01 9.03 $\pm$ 0.01   TCS
Apr. 28, 1995 49835.5 9.23 $\pm$ 0.01 9.14 $\pm$ 0.01 9.05 $\pm$ 0.01   TCS
Apr. 29, 1995 49836.5 9.20 $\pm$ 0.01 9.08 $\pm$ 0.01 9.04 $\pm$ 0.01   TCS
Jul. 28, 1995 49926.5 9.22 $\pm$ 0.02 9.12 $\pm$ 0.01 9.09 $\pm$ 0.15   TCS
Jul. 28, 1995 49926.5 9.23 $\pm$ 0.01 9.04 $\pm$ 0.01 9.60 $\pm$ 0.13   TCS
Jul. 29, 1995 49927.5 9.18 $\pm$ 0.01 9.06 $\pm$ 0.01 8.94 $\pm$ 0.06   TCS
Jul. 29, 1995 49927.5 9.19 $\pm$ 0.01 9.04 $\pm$ 0.01 9.09 $\pm$ 0.11   TCS
Jul. 31, 1995 49929.5 9.27 $\pm$ 0.01 9.10 $\pm$ 0.01 8.95 $\pm$ 0.01   TCS
Oct. 11, 1995 50001.5 9.36 $\pm$ 0.01 9.17 $\pm$ 0.01 9.00 $\pm$ 0.00   TCS
Oct. 14, 1995 50004.5 9.15 $\pm$ 0.01 9.03 $\pm$ 0.01 8.90 $\pm$ 0.01   TCS
Jul. 27, 1996 50291.5 9.40 $\pm$ 0.01 9.25 $\pm$ 0.01 9.07 $\pm$ 0.00   TCS
Jul. 28, 1996 50292.5 9.14 $\pm$ 0.01 9.03 $\pm$ 0.01 8.92 $\pm$ 0.01   TCS
Jul. 16, 1997 50645.5 9.20 $\pm$ 0.01 9.09 $\pm$ 0.01 8.98 $\pm$ 0.01   TCS
Jul. 17, 1997 50646.5 9.18 $\pm$ 0.01 9.06 $\pm$ 0.01 8.96 $\pm$ 0.01   TCS
Jul. 19, 1997 50648.5 9.17 $\pm$ 0.01 9.07 $\pm$ 0.01 8.99 $\pm$ 0.00   TCS
Jun. 15, 1998 50979.5 9.16 $\pm$ 0.01 9.09 $\pm$ 0.01 8.98 $\pm$ 0.01   TCS
Jun. 16, 1998 50980.5 9.12 $\pm$ 0.01 9.07 $\pm$ 0.01 8.98 $\pm$ 0.01   TCS
Jun. 17, 1998 50981.5 9.19 $\pm$ 0.01 9.10 $\pm$ 0.01 8.99 $\pm$ 0.00   TCS
Oct. 27, 1998 51113.5 9.29 $\pm$ 0.01 9.17 $\pm$ 0.01 9.13 $\pm$ 0.00   TCS
Jul. 26, 1999 51385.5 9.23 $\pm$ 0.02 9.12 $\pm$ 0.02 9.09 $\pm$ 0.02   TCS
Jul. 28, 1999 51387.5 9.20 $\pm$ 0.02 9.13 $\pm$ 0.02 9.05 $\pm$ 0.02   TCS
Jul. 31, 1999 51390.5 9.22 $\pm$ 0.02 9.13 $\pm$ 0.02 9.06 $\pm$ 0.02   TCS
Oct. 02, 1999 51453.5 9.18 $\pm$ 0.02 9.08 $\pm$ 0.02 8.98 $\pm$ 0.02   TCS
Oct. 04, 1999 51455.5 9.20 $\pm$ 0.02 9.10 $\pm$ 0.02 9.03 $\pm$ 0.02   TCS
Oct. 05, 1999 51456.5 9.20 $\pm$ 0.02 9.13 $\pm$ 0.01 9.02 $\pm$ 0.02   TCS
Jan. 15, 2001 51924.5 9.20 $\pm$ 0.02 9.08 $\pm$ 0.02 8.96 $\pm$ 0.02   TCS

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