SNe observations by Y.Sano object YYMMDD(UT) mag code SN1999bg 19990517.545 16.05C San.VSOLJ Observer's code: San: Y. Sano (Nayoro, Hokkaido,Japan) Instruments: 28cm-SCT + ST-6 30s exp. Magnitudes based on 9 USNO stars, object YYMMDD(UT) mag code SN1999bw 19990517.533 17.43C San.VSOLJ Observer's code: San: Y. Sano (Nayoro, Hokkaido,Japan) Instruments: 28cm-SCT + ST-6 60s exp. Magnitudes based on 6 USNO stars, object YYMMDD(UT) mag code SN1999by 19990517.522 13.16C San.VSOLJ Observer's code: San: Y. Sano (Nayoro, Hokkaido,Japan) Instruments: 28cm-SCT + ST-6 30s exp. Magnitudes based on 5 (vsnet alert 2937(V-(V-R) Yasuo sano(sanoef@coral.ocn.ne.jp)