ASASSN-15sm rapidly faded YYYYMMDD(UT) mag observer 20221217.3919 15.280zr (ZTF Alert DC mag (Masci+ 2019)) 20221217.4054 15.041zg (ZTF Alert DC mag (Masci+ 2019)) 20221217.4059 15.063zg (ZTF Alert DC mag (Masci+ 2019)) 20221217.4342 15.260zr (ZTF Alert DC mag (Masci+ 2019)) 20221218.1662 15.36C (Masao Funada) 20221219.858 17.11C (Hiroshi Itoh) 20221220.519 <154 (Rod Stubbings) 20221220.765 17.87C (Hiroshi Itoh) 20221222.576 <161 (Rod Stubbings)