Short-term light variations of the Nova Cyg 2014
ATel #6128; K. Imamura (Okayama Astronomical Museum), H. Akazawa (Okayama University of Science), H. Maehara (University of Tokyo)
on 8 May 2014; 18:07 UT
Credential Certification: Kazuyoshi Imamura (imako@pc.117.cx)
Subjects: Optical, Cataclysmic Variable, Nova
We report optical photometry of the Nova Cyg 2014 (= PNV J20214234+3103296) which was discovered by K. Nishiyama and F. Kabashima (CBET #3842). We have performed time-resolved photometry of the object in Rc-band with 20-cm Schmidt-Cassegrain telescope and ST-9XE CCD camera from 2014 April 10 to May 6. The object shows clearly ~0.1 mag modulations with a timescale of several hours on April 14, 23, 24 and 25.
Moreover, V- and Ic-band photometry obtained with the Kiso Wide-field Survey (KWS; f=105-mm lens and ST-8XME CCD) show that the object reached to the maximum brightness at 9.3 mag in V-band on April 9 and then rapidly faded to V=10.7 mag on April 11. After the maximum and rapid fading, the object has rebrightened to V=10.1 mag on April 25. Subsequently, this nova has faded slowly to V=10.7 mag on May 7. The KWS data are as follows:
date time (UT) mag err band
2014/4/6 19:46:09 9.430 0.095 Ic
2014/4/6 19:46:10 10.603 0.107 V
2014/4/8 19:27:33 8.517 0.021 Ic
2014/4/8 19:27:33 9.914 0.026 V
2014/4/8 19:28:08 8.533 0.021 Ic
2014/4/8 19:28:09 9.898 0.026 V
2014/4/9 19:13:42 8.037 0.015 Ic
2014/4/9 19:13:43 9.331 0.018 V
2014/4/9 19:14:17 8.056 0.016 Ic
2014/4/9 19:14:18 9.323 0.018 V
2014/4/9 19:19:54 8.021 0.015 Ic
2014/4/9 19:19:55 9.336 0.019 V
2014/4/9 19:20:29 8.090 0.016 Ic
2014/4/9 19:20:29 9.292 0.018 V
2014/4/10 19:14:24 8.227 0.016 Ic
2014/4/10 19:14:24 9.594 0.018 V
2014/4/10 19:14:59 8.230 0.016 Ic
2014/4/10 19:14:59 9.627 0.018 V
2014/4/11 19:07:20 8.816 0.023 Ic
2014/4/11 19:07:20 10.794 0.041 V
2014/4/11 19:07:55 8.820 0.023 Ic
2014/4/11 19:07:55 10.675 0.038 V
2014/4/11 19:32:07 8.825 0.033 Ic
2014/4/11 19:32:08 10.703 0.066 V
2014/4/11 19:32:42 8.837 0.034 Ic
2014/4/11 19:32:43 10.802 0.075 V
2014/4/15 18:54:21 8.591 0.025 Ic
2014/4/15 18:54:22 10.341 0.052 V
2014/4/15 18:54:57 8.608 0.025 Ic
2014/4/15 18:54:57 10.438 0.056 V
2014/4/23 19:07:18 8.700 0.024 Ic
2014/4/23 19:07:19 10.255 0.033 V
2014/4/23 19:07:54 8.680 0.024 Ic
2014/4/23 19:07:55 10.206 0.033 V
2014/4/24 18:47:51 8.516 0.020 Ic
2014/4/24 18:47:51 10.088 0.030 V
2014/4/24 18:48:28 8.561 0.021 Ic
2014/4/24 18:48:28 10.158 0.031 V
2014/4/25 18:52:51 8.490 0.020 Ic
2014/4/25 18:52:51 10.110 0.030 V
2014/4/25 18:53:26 8.471 0.019 Ic
2014/4/25 18:53:26 10.077 0.029 V
2014/4/26 18:43:42 8.666 0.028 Ic
2014/4/26 18:43:43 10.339 0.047 V
2014/4/26 18:44:17 8.645 0.035 Ic
2014/4/26 18:44:18 10.225 0.048 V
2014/4/27 18:06:47 8.622 0.027 Ic
2014/4/27 18:06:48 10.289 0.038 V
2014/4/27 18:07:23 8.658 0.028 Ic
2014/4/27 18:07:24 10.301 0.039 V
2014/5/6 18:36:25 8.697 0.020 Ic
2014/5/6 18:36:25 10.426 0.029 V
2014/5/6 18:36:59 8.730 0.020 Ic
2014/5/6 18:36:59 10.489 0.030 V
2014/5/7 17:59:14 8.867 0.023 Ic
2014/5/7 17:59:15 10.631 0.036 V
2014/5/7 17:59:50 8.825 0.023 Ic
2014/5/7 17:59:51 10.691 0.038 V
