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Brightening of Nova Cas 1995     December 22, 2001 Yoshida, S.; Ohkura, N. The significant small sudden brightening of V723 Cas = Nova Cas 1995 between 2001 Oct. 13 and 14, about 6 years after the peak in 1995 December, was detected by the MISAO Project. Star A: USNO-A2.0 1425.01502823 01h04m55s.027 +53o58'08".89 Mag(R):12.2 Mag(B):13.6 Star B: USNO-A2.0 1425.01502160 01h04m53s.189 +54o00'05".21 Mag(R):13.6 Mag(B):14.4 Star C: USNO-A2.0 1425.01510597 01h05m16s.428 +54o00'46".55 Mag(R):13.7 Mag(B):15.1 The table below shows the magnitude data of the nova and three comparison stars measured automatically by the PIXY system 2 from CCD images taken by Nobuo Ohkura, Okayama, Japan. Date Nova A B C Oct. 13.58146 14.33 11.83 14.01 14.47 Oct. 13.58343 14.29 11.85 13.90 14.47 Oct. 13.58541 14.45 11.93 14.10 14.59 Oct. 14.58438 14.03 11.87 14.06 14.46 Oct. 14.58634 13.97 11.85 13.97 14.40 The table below shows the relative magnitude. The average magnitude of star A, B and C on each date is subtracted from the raw magnitude. Date Nova A B C Oct. 13.58146 0.89 -1.61 0.57 1.03 Oct. 13.58343 0.88 -1.56 0.49 1.06 Oct. 13.58541 0.91 -1.61 0.56 1.05 Oct. 14.58438 0.57 -1.59 0.60 1.00 Oct. 14.58634 0.56 -1.56 0.56 0.99 Here is the light curve of the relative magnitude. The VSNET visual data in 2001 October are as follows: Oct. 6.784 14.3 RMQ Oct. 8.775 14.5 BMU Oct. 13.155 14.4 MRV Oct. 16.874 14.2 CMG Oct. 16.923 14.3 BMU The small brightening was not detected clearly by visual observers. References [vsnet-chat 4950]