CI Aql observation: eclipse? Simultaneous observations done at Kyoto (K. Matsumoto and M. Uemura) and Tsukuba (S. Kiyota) on May 8 night caught a monotonous fading by 0.07-0.10 mag (slightly depending on the photometric band). The light curve at both observatories look like an eclipse. This fading stage corresponds to the ingress to secondary eclipse. Follow-up observations are strongly encouraged to check the possible existence of eclipses at this outbursting stage. The details are (will be) presented mainly in vsnet-campaign. On behalf of the VSNET collaboration team