J1748.9-2021 : X-ray and optical outburst

According to ATEL No. 74, this X-ray transient in NGC 6440 experienced an outburst (in't Zand et al.) and the source has been confirmed to be identified with the outbursting optical variable V2 (vsnet-campaign-xray 83, 84, vsnet-campaign 1151, 1152).