\begin{table}%t2 \caption{\label{tab2}Observed continuum, the broad H$\alpha$~and H$\beta$ fluxes, reduced to the 6 m telescope aperture $2''\times 6''$. } \begin{tabular}{clccccl} \hline \hline\noalign{\smallskip} N& UT-date& JD &$F$(5100)$\pm \sigma$ &$F$(H$\alpha$)$\pm \sigma$ & $F$(H$\beta$)$\pm \sigma$ \\ & & 2~400~000+ & $10^{-15} \ \rm erg \ cm^{-2} \ s^{-1}~\AA^{-1}$ & $10^{-13} \ \rm erg \ cm^{-2} \ s^{-1}$ & $10^{-13} \ \rm erg \ cm^{-2} \ s^{-1}$ \\ 1&2&3&4&5&6\\ \hline 1 & 1995 Apr. 25 & 49~832.424 & 1.37~$\pm$~0.04 & & 1.67~$\pm$~0.07 \\ 2 & 1995 May 26 & 49~863.375 & 1.55~$\pm$~0.05 & & 2.02~$\pm$~0.08 \\ 3 & 1995 Nov. 17 & 50~039.156 & 2.46~$\pm$~0.07 & & 2.18~$\pm$~0.09 \\ 4 & 1995 Nov. 29 & 50~051.143 & 2.47~$\pm$~0.07 & & 2.27~$\pm$~0.10 \\ 5 & 1995 Nov. 30 & 50~052.149 & 2.55~$\pm$~0.08 & & 1.89~$\pm$~0.08 \\ 6 & 1996 Feb. 14 & 50~127.602 & 2.27~$\pm$~0.07 & & 2.73~$\pm$~0.11 \\ 7 & 1996 Mar. 20 & 50~162.580 & 2.49~$\pm$~0.07 & & 2.83~$\pm$~0.12 \\ 8 & 1996 Mar. 20 & 50~162.587 & & 13.90~$\pm$~1.17 & \\ 9 & 1996 Mar. 21 & 50~163.553 & 2.52~$\pm$~0.08 & & 3.15~$\pm$~0.13 \\ 10 & 1996 Mar. 21 & 50~163.572 & & 11.19~$\pm$~0.94 & \\ 11 & 1996 Jun. 15 & 50~249.542 & 1.74~$\pm$~0.05 & & 2.45~$\pm$~0.10 \\ 12 & 1996 Jul. 12 & 50~276.567 & 1.49~$\pm$~0.04 & & 2.68~$\pm$~0.11 \\ 13 & 1996 Jul. 12 & 50~276.570 & & 12.13~$\pm$~1.02 & \\ 14 & 1996 Jul. 13 & 50~277.556 & 1.48~$\pm$~0.04 & & 2.44~$\pm$~0.10 \\ 15 & 1996 Jul. 17 & 50~281.434 & 1.57~$\pm$~0.05 & & 2.38~$\pm$~0.10 \\ 16 & 1996 Aug. 10 & 50~305.489 & 1.72~$\pm$~0.05 & & 2.47~$\pm$~0.10 \\ 17 & 1996 Sep. 11 & 50~338.800 & 1.75~$\pm$~0.05 & & 1.91~$\pm$~0.08 \\ 18 & 1996 Nov. 03 & 50~390.431 & 1.55~$\pm$~0.05 & & 2.02~$\pm$~0.09 \\ 19 & 1996 Nov. 05 & 50~392.621 & 1.50~$\pm$~0.05 & & 1.84~$\pm$~0.08 \\ 20 & 1997 Mar. 04 & 50~511.622 & 1.10~$\pm$~0.03 & & 1.28~$\pm$~0.05 \\ 21 & 1997 May 30 & 50~599.370 & 1.19~$\pm$~0.04 & & 1.42~$\pm$~0.06 \\ 22 & 1997 Jul. 26 & 50~656.499 & 0.97~$\pm$~0.03 & & 1.30~$\pm$~0.05 \\ 23 & 1997 Aug. 30 & 50~691.463 & 1.11~$\pm$~0.03 & & 1.28~$\pm$~0.05 \\ 24 & 1997 Sep. 10 & 50~701.566 & & 7.28~$\pm$~0.61 & \\ 25 & 1997 Sep. 10 & 50~701.576 & 1.21~$\pm$~0.04 & & 1.12~$\pm$~0.05 \\ 26 & 1997 Dec. 26 & 50~808.582 & 1.68~$\pm$~0.05 & & 1.53~$\pm$~0.06 \\ 27 & 1997 Dec. 27 & 50~810.184 & 1.56~$\pm$~0.05 & & 1.79~$\pm$~0.08 \\ 28 & 1997 Dec. 27 & 50~810.203 & & 9.74~$\pm$~0.82 & \\ 29 & 1997 Dec. 28 & 50~811.194 & 1.49~$\pm$~0.04 & & 1.56~$\pm$~0.07 \\ 30 & 1997 Dec. 28 & 50~811.206 & & 7.99~$\pm$~0.67 & \\ 31 & 1997 Dec. 30 & 50~813.195 & 1.58~$\pm$~0.05 & & 1.45~$\pm$~0.06 \\ 32 & 1998 Jan. 22 & 50~835.631 & 1.81~$\pm$~0.05 & & 1.61~$\pm$~0.07 \\ 33 & 1998 Feb. 23 & 50~867.560 & 1.62~$\pm$~0.05 & & 1.87~$\pm$~0.08 \\ 34 & 1998 Feb. 23 & 50~867.573 & & 6.06~$\pm$~0.51 & \\ 35 & 1998 May 06 & 50~940.354 & 1.87~$\pm$~0.06 & & 2.29~$\pm$~0.10 \\ 36 & 1998 Jun. 25 & 50~990.302 & 1.78~$\pm$~0.05 & & 2.21~$\pm$~0.09 \\ 37 & 1998 Jul. 16 & 51~010.719 & 1.56~$\pm$~0.05 & 8.12~$\pm$~0.68 & 2.35~$\pm$~0.10 \\ 38 & 1998 Jul. 25 & 51~019.723 & 1.43~$\pm$~0.04 & & 2.34~$\pm$~0.10 \\ 39 & 1998 Jul. 28 & 51~023.491 & 1.55~$\pm$~0.05 & & 2.14~$\pm$~0.09 \\ 40 & 1998 Jul. 30 & 51~025.431 & 1.40~$\pm$~0.04 & & 1.95~$\pm$~0.08 \\ 41 & 1998 Aug. 30 & 51~055.551 & 1.45~$\pm$~0.04 & & 2.04~$\pm$~0.09 \\ 42 & 1998 Aug. 30 & 51~055.562 & & 10.30~$\pm$~0.87 & \\ 43 & 1998 Sep. 19 & 51~076.004 & 1.65~$\pm$~0.05 & & 2.07~$\pm$~0.09 \\ 44 & 1998 Sep. 25 & 51~081.429 & 1.51~$\pm$~0.05 & & 2.10~$\pm$~0.09 \\ 45 & 1998 Sep. 26 & 51~082.429 & 1.59~$\pm$~0.05 & & 2.14~$\pm$~0.09 \\ 46 & 1998 Sep. 27 & 51~083.429 & 1.55~$\pm$~0.05 & 6.70~$\pm$~0.56 & 2.20~$\pm$~0.09 \\ 47 & 1998 Oct. 25 & 51~112.259 & 1.34~$\pm$~0.04 & & 2.11~$\pm$~0.09 \\ 48 & 1998 Dec. 02 & 51~149.625 & 1.45~$\pm$~0.04 & 7.68~$\pm$~0.65 & 2.15~$\pm$~0.09 \\ 49 & 1999 Jul. 13 & 51~372.516 & 1.19~$\pm$~0.04 & & 1.37~$\pm$~0.06 \\ 50 & 1999 Aug. 19 & 51~410.309 & 1.34~$\pm$~0.04 & & 1.61~$\pm$~0.07 \\ 51 & 1999 Sep. 04 & 51~425.904 & 1.43~$\pm$~0.04 & & 1.65~$\pm$~0.07 \\ 52 & 1999 Sep. 05 & 51~427.272 & & 7.40~$\pm$~0.62 & \\ 53 & 1999 Oct. 03 & 51~454.674 & 1.62~$\pm$~0.05 & & 1.89~$\pm$~0.08 \\ 54 & 1999 Oct. 04 & 51~455.664 & 1.38~$\pm$~0.04 & & 1.80~$\pm$~0.08 \\ 55 & 1999 Oct. 09 & 51~461.531 & 1.55~$\pm$~0.05 & & 1.65~$\pm$~0.07 \\ 56 & 2000 Jul. 19 & 51~745.365 & 1.56~$\pm$~0.05 & & 1.92~$\pm$~0.08 \\ 57 & 2000 Jul. 22 & 51~748.232 & 1.60~$\pm$~0.05 & & 1.56~$\pm$~0.07 \\ 58 & 2000 Jul. 30 & 51~756.293 & 1.54~$\pm$~0.05 & & 1.98~$\pm$~0.08 \\ 59 & 2000 Jul. 30 & 51~756.317 & & 9.49~$\pm$~0.80 & \\ 60 & 2000 Oct. 05 & 51~823.142 & 1.41~$\pm$~0.04 & & 1.72~$\pm$~0.07 \\ 61 & 2000 Nov. 18 & 51~867.136 & 1.56~$\pm$~0.05 & & 1.82~$\pm$~0.08 \\ 62 & 2000 Nov. 19 & 51~868.128 & 1.66~$\pm$~0.05 & & 1.93~$\pm$~0.08 \\ 63 & 2001 Jan. 16 & 51~925.631 & 1.53~$\pm$~0.05 & & 1.93~$\pm$~0.08 \\ 64 & 2001 Jan. 16 & 51~925.647 & & 7.78~$\pm$~0.65 & \\ 65 & 2001 Jan. 20 & 51~929.623 & 1.47~$\pm$~0.04 & & 1.81~$\pm$~0.08 \\ 66 & 2001 Jan. 20 & 51~929.639 & & 9.59~$\pm$~0.81 & \\ 67 & 2001 Mar. 13 & 51~981.950 & 1.40~$\pm$~0.04 & & 1.88~$\pm$~0.08 \\ 68 & 2001 May 05 & 52~034.660 & 1.39~$\pm$~0.04 & 7.38~$\pm$~0.62 & 1.56~$\pm$~0.07 \\ 69 & 2001 May 14 & 52~043.900 & 1.35~$\pm$~0.04 & 6.85~$\pm$~0.58 & 1.56~$\pm$~0.07 \\ 70 & 2001 Jun. 14 & 52~074.850 & 1.34~$\pm$~0.04 & & 1.59~$\pm$~0.07 \\ 71 & 2001 Jun. 14.5 & 52~075.350 & & 6.77~$\pm$~0.57 & \\ 72 & 2001 Jun. 15 & 52~075.850 & 1.30~$\pm$~0.04 & & 1.55~$\pm$~0.07 \\ 73 & 2001 Oct. 10 & 52~192.600 & 1.08~$\pm$~0.03 & 6.25~$\pm$~0.52 & 1.22~$\pm$~0.05 \\ 74 & 2001 Nov. 23 & 52~237.272 & 1.37~$\pm$~0.04 & & 1.06~$\pm$~0.04 \\ 75 & 2002 Feb. 21 & 52~327.226 & 1.36~$\pm$~0.04 & & 1.09~$\pm$~0.05 \\ 76 & 2002 Feb. 21 & 52~327.200 & & 6.63~$\pm$~0.56 & \\ 77 & 2002 Mar. 05 & 52~339.019 & 1.20~$\pm$~0.04 & 5.60~$\pm$~0.47 & 0.94~$\pm$~0.04 \\ 78 & 2002 Apr. 03 & 52~368.005 & 1.20~$\pm$~0.04 & & 1.02~$\pm$~0.04 \\ 79 & 2002 Jun. 03 & 52~428.968 & & 6.60~$\pm$~0.55 & \\ 80 & 2002 Jun. 04 & 52~429.950 & & 6.47~$\pm$~0.54 & \\ 81 & 2002 Jun. 05 & 52~430.938 & 1.42~$\pm$~0.04 & & 1.21~$\pm$~0.05 \\ 82 & 2002 Jun. 24 & 52~450.385 & 1.72~$\pm$~0.05 & & 1.71~$\pm$~0.07 \\ 83 & 2002 Jun. 24 & 52~450.410 & & 5.86~$\pm$~0.49 & \\ 84 & 2002 Jul. 09 & 52~464.444 & 1.60~$\pm$~0.05 & & 1.54~$\pm$~0.06 \\ 85 & 2002 Jul. 13 & 52~469.408 & 1.85~$\pm$~0.06 & & 1.72~$\pm$~0.07 \\ 86 & 2002 Jul. 13 & 52~469.433 & & 5.93~$\pm$~0.50 & \\ 87 & 2002 Aug. 08 & 52~495.272 & 1.71~$\pm$~0.05 & & 1.42~$\pm$~0.06 \\ 88 & 2002 Aug. 16 & 52~502.795 & 1.61~$\pm$~0.05 & & 1.60~$\pm$~0.07 \\ 89 & 2002 Oct. 14 & 52~562.318 & & 9.03~$\pm$~0.76 & \\ 90 & 2002 Oct. 14 & 52~562.342 & 1.55~$\pm$~0.05 & & 1.82~$\pm$~0.08 \\ 91 & 2002 Nov. 13 & 52~591.659 & & 7.87~$\pm$~0.66 & \\ 92 & 2002 Nov. 14 & 52~592.659 & & 6.32~$\pm$~0.53 & \\ 93 & 2002 Nov. 15 & 52~593.671 & 1.36~$\pm$~0.04 & & 1.60~$\pm$~0.07 \\ 94 & 2002 Dec. 11 & 52~620.389 & 1.71~$\pm$~0.05 & & 1.60~$\pm$~0.07 \\ 95 & 2003 May 08 & 52~768.217 & 1.96~$\pm$~0.06 & & 1.69~$\pm$~0.07 \\ 96 & 2003 May 10 & 52~770.219 & & 6.40~$\pm$~0.54 & \\ 97 & 2003 May 23 & 52~782.966 & 2.10~$\pm$~0.06 & & 1.69~$\pm$~0.07 \\ 98 & 2003 May 24 & 52~783.976 & 2.15~$\pm$~0.06 & & 1.76~$\pm$~0.07 \\ 99 & 2003 May 25 & 52~784.973 & & 6.68~$\pm$~0.56 & \\ 100 & 2003 May 26 & 52~785.979 & 2.15~$\pm$~0.06 & & 1.68~$\pm$~0.07 \\ 101 & 2003 Jun. 22 & 52~812.963 & 2.28~$\pm$~0.07 & & 1.78~$\pm$~0.07 \\ 102 & 2003 Sep. 18 & 52~900.794 & & & 1.96~$\pm$~0.08 \\ 103 & 2003 Sep. 20 & 52~902.803 & & 7.78~$\pm$~0.65 & \\ 104 & 2003 Oct. 21 & 52~933.672 & 1.96~$\pm$~0.06 & 7.11~$\pm$~0.60 & 1.77~$\pm$~0.07 \\ 105 & 2003 Nov. 19 & 52~962.637 & 2.83~$\pm$~0.08 & & 1.99~$\pm$~0.08 \\ 106 & 2003 Nov. 20 & 52~963.608 & 2.93~$\pm$~0.09 & & 2.15~$\pm$~0.09 \\ 107 & 2004 Mar. 01 & 53~066.358 & & 9.15~$\pm$~0.77 & \\ 108 & 2004 Mar. 01 & 53~065.507 & 2.48~$\pm$~0.07 & & 2.25~$\pm$~0.09 \\ 109 & 2004 May 20 & 53~145.982 & 2.01~$\pm$~0.06 & & 2.40~$\pm$~0.10 \\ 110 & 2004 Jun. 12 & 53~168.955 & 1.95~$\pm$~0.06 & & 2.32~$\pm$~0.10 \\ 111 & 2004 Jun. 13 & 53~169.966 & & 8.71~$\pm$~0.73 & \\ 112 & 2004 Jun. 15 & 53~171.944 & 1.95~$\pm$~0.06 & & 2.04~$\pm$~0.09 \\ 113 & 2004 Aug. 19 & 53~236.808 & 2.31~$\pm$~0.07 & & 2.11~$\pm$~0.09 \\ 114 & 2004 Aug. 20 & 53~237.821 & & 9.49~$\pm$~0.80 & \\ 115 & 2004 Aug. 21 & 53~238.858 & 2.31~$\pm$~0.07 & & 2.16~$\pm$~0.09 \\ 116 & 2004 Sep. 06 & 53~254.771 & 2.13~$\pm$~0.06 & & 2.16~$\pm$~0.09 \\ 117 & 2004 Dec. 18 & 53~358.140 & 3.13~$\pm$~0.09 & & 2.78~$\pm$~0.12 \\ 118 & 2004 Dec. 19 & 53~359.130 & 2.92~$\pm$~0.09 & 10.69~$\pm$~0.90 & 2.67~$\pm$~0.11 \\ 119 & 2004 Dec. 20 & 53~360.150 & 2.87~$\pm$~0.09 & 11.23~$\pm$~0.94 & 2.76~$\pm$~0.12 \\ 120 & 2005 Apr. 15 & 53~475.997 & 3.19~$\pm$~0.1 & & 2.71~$\pm$~0.11 \\ 121 & 2005 Apr. 16 & 53~476.993 & & 9.69~$\pm$~0.81 & \\ 122 & 2005 Apr. 18 & 53~478.992 & 3.28~$\pm$~0.1 & 10.11~$\pm$~0.85 & 2.99~$\pm$~0.13 \\ 123 & 2005 May 13 & 53~503.972 & 3.66~$\pm$~0.11 & & 2.92~$\pm$~0.12 \\ 124 & 2005 Jun. 10 & 53~531.925 & 4.25~$\pm$~0.13 & & 2.91~$\pm$~0.12 \\ 125 & 2005 Aug. 30 & 53~612.758 & 4.57~$\pm$~0.14 & & 3.50~$\pm$~0.15 \\ 126 & 2005 Aug. 31 & 53~613.773 & 4.55~$\pm$~0.14 & & 3.34~$\pm$~0.14 \\ 127 & 2005 Sep. 01 & 53~614.750 & 4.62~$\pm$~0.14 & & 3.54~$\pm$~0.15 \\ 128 & 2005 Dec. 06 & 53~711.420 & 4.63~$\pm$~0.14 & 19.14~$\pm$~1.61 & 4.09~$\pm$~0.17 \\ 129 & 2006 Jun. 04 & 53~891.490 & 3.71~$\pm$~0.11 & & 3.70~$\pm$~0.16 \\ 130 & 2006 Sep. 01 & 53~979.790 & 3.24~$\pm$~0.1 & & 3.49~$\pm$~0.15 \\ 131 & 2006 Sep. 16 & 53~994.780 & 3.12~$\pm$~0.09 & & 3.15~$\pm$~0.13 \\ 132 & 2006 Sep. 17 & 53~995.750 & 3.17~$\pm$~0.1 & & 3.40~$\pm$~0.14 \\ 133 & 2006 Sep. 18 & 53~996.700 & 3.20~$\pm$~0.1 & & 3.40~$\pm$~0.14 \\ 134 & 2006 Sep. 19 & 53~997.740 & 3.20~$\pm$~0.1 & & 3.44~$\pm$~0.14 \\ 135 & 2006 Sep. 20 & 53~998.750 & 3.18~$\pm$~0.1 & & 3.27~$\pm$~0.14 \\ 136 & 2006 Oct. 28 & 54~036.630 & 2.87~$\pm$~0.09 & 17.41~$\pm$~1.46 & 3.18~$\pm$~0.13 \\ 137 & 2006 Oct. 29 & 54~037.640 & 2.82~$\pm$~0.08 & & 3.40~$\pm$~0.14 \\ 138 & 2006 Nov. 01 & 54~040.650 & 2.84~$\pm$~0.09 & & 3.30~$\pm$~0.14 \\ 139 & 2006 Dec. 18 & 54~088.210 & 2.99~$\pm$~0.09 & & 3.31~$\pm$~0.14 \\ 140 & 2007 Jan. 12 & 54~112.640 & 3.46~$\pm$~0.1 & 12.16~$\pm$~1.02 & 3.18~$\pm$~0.13 \\ 141 & 2007 Jan. 13 & 54~113.650 & 3.32~$\pm$~0.1 & 14.72~$\pm$~1.24 & 3.14~$\pm$~0.13 \\ 142 & 2007 Feb. 12 & 54~143.610 & 3.92~$\pm$~0.12 & 15.86~$\pm$~1.33 & 3.35~$\pm$~0.14 \\ 143 & 2007 May 22 & 54~242.890 & 4.89~$\pm$~0.15 & & 3.72~$\pm$~0.16 \\ 144 & 2007 May 23 & 54~243.880 & 5.07~$\pm$~0.15 & & 3.97~$\pm$~0.17 \\ 145 & 2007 Jun. 20 & 54~271.870 & 4.85~$\pm$~0.15 & & 3.83~$\pm$~0.16 \\ 146 & 2007 Jun. 21 & 54~272.960 & 4.72~$\pm$~0.14 & & 4.20~$\pm$~0.18 \\ 147 & 2007 Aug. 09 & 54~321.820 & 3.73~$\pm$~0.11 & & 3.96~$\pm$~0.17 \\ 148 & 2007 Aug. 10 & 54~322.810 & & 12.46~$\pm$~1.05 & \\ 149 & 2007 Aug. 11 & 54~323.800 & 3.78~$\pm$~0.11 & & 4.06~$\pm$~0.17 \\ 150 & 2007 Aug. 12 & 54~324.810 & 3.81~$\pm$~0.11 & & 3.94~$\pm$~0.17 \\ 151 & 2007 Sep. 03 & 54~346.730 & 4.11~$\pm$~0.12 & 15.30~$\pm$~1.28 & 4.28~$\pm$~0.18 \\ 152 & 2007 Sep. 04 & 54~347.720 & 4.09~$\pm$~0.12 & & 4.30~$\pm$~0.18 \\ 153 & 2007 Sep. 05 & 54~348.720 & 4.10~$\pm$~0.12 & & 4.08~$\pm$~0.17 \\ 154 & 2007 Oct. 16 & 54~389.690 & 3.91~$\pm$~0.12 & 13.96~$\pm$~1.17 & 4.34~$\pm$~0.18 \\ 155 & 2007 Oct. 18 & 54~391.630 & 4.05~$\pm$~0.12 & & 4.42~$\pm$~0.19 \\ 156 & 2007 Nov. 02 & 54~406.650 & 3.80~$\pm$~0.11 & & 4.10~$\pm$~0.17 \\ 157 & 2007 Nov. 04 & 54~408.610 & 3.78~$\pm$~0.11 & 12.81~$\pm$~1.08 & 4.28~$\pm$~0.18 \\ 158 & 2007 Nov. 08 & 54~412.690 & 3.67~$\pm$~0.11 & & 4.12~$\pm$~0.17 \\ \end{tabular} \tablefoot{Column~(1): number. Column~(2): UT-date. Column~(3): Julian date. Column~(4): $F$(cont), the continuum flux at 5100~\AA~(for $Z=0$) (in units of $10^{-15}$~ erg~s$^{-1}$~cm$^{-2}$~\AA$^{-1}$), and $\varepsilon_{\rm cont}$, the estimated continuum flux error. Column~(5): $F$(H$\alpha$), the H$\alpha$~total flux (in units of $10^{-13}$~erg~s$^{-1}$~cm$^{-2}$) in regions (6740$-$7160)~\AA, and $\varepsilon_{{\rm H}\alpha}$, the H$\alpha$~flux error. Column~(6): $F$(H$\beta$), the H$\beta$ total flux (in units of 10$^{-13}$~erg~s$^{-1}$~cm$^{-2}$) in regions (4909$-$5353)~\AA, and $\varepsilon_{\rm H\beta}$, the H$\beta$ flux error.} \end{table}