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Date: Tue, 07 Sep 1993 05:55:08 -0700 (PDT) From: "IGW::PSI%ESX25NET.IHEPVX::ZHOUXU"@SCS.SLAC.STANFORD.EDU Subject: SN1993J Observation BVRI photometric observation of supernova 1993J Further observations show violent variation in BVRI photometry of SN1993J. I wish all the SN1993J observers to check our following result. Date(UT) B V R I Observers Sky Sept04.41 14.90 14.32 13.46 12.92 Li,Y.,ZHOU Xu (good) Sept04.44 15.07 14.49 13.55 12.91 Li,Y.,ZHOU Xu Sept05.45 14.91 14.26 13.49 13.10 Yan,H.J.,ZHOU Xu (good) Sept05.49 14.85 14.22 13.48 12.91 Yan,H.J.,ZHOU Xu Sept05.54 14.78 14.02 13.43 12.86 Yan,H.J.,ZHOU Xu Sept05.58 14.80 14.13 13.33 12.85 Yan,H.J.,ZHOU Xu Sept06.35 14.96 14.73 13.97 14.01 Yan,H.J.,ZHOU Xu (cloudy) Sept06.38 14.97 14.29 13.88 14.16 Yan,H.J.,ZHOU Xu (cloudy) Observation of SN1993J were done with the camera attached to the 60/90cm Schmidt telescope in Xing-Long station of Beijing Astronomical Observatory and a Ford CCD with 2048x2048 15um pixel as detector. The field size of CCD image is about one square degree. The errors are less than +/- 0.03 except U band. *** REPORT BY ZHOU XU ***
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