ASASSN-14cl New large-amplitude cataclysmic variable
June 20, 2014
Kris Z. Stanek (The Ohio State University) et al. reported the discovery during the ongoing All-Sky Automated Survey for SuperNovae (ASAS-SN) of a bright transient (10.66V) on 2014 June 14.52 UT. Data were obtained using the quadruple 14-cm "Brutus" telescope in Haleakala, HI (hosted by Las Cumbre Observatory Global Telescope Network).
Observations by Arto Oksanen (Muurame, Finland) and Colin Littlefield (South Bend, IN) show <0.1-magnitude amplitude variations, which may be related to early superhump formation. Nick James (Chelmsford, England) reports a possible superhump period from his observations made around June 19.0804 UT that is different from earlier values published but indicates the difference may be due to insufficient data on his part.
11 observers have contributed over 4,000 B/V/TB/TG and visual observations to the AAVSO International Database to date. The earliest observations reported to the AAVSO include: 2014 June 13.5 UT, <16.2 V (ASASSN);