Multiwavelength Evidence for a New Flare-mode Transitional Millisecond Pulsar. - Strader, Jay; Swihart, Samuel J.; Urquhart, Ryan; Chomiuk, Laura; Aydi, Elias; Bahramian, Arash; Kawash, Adam; Sokolovsky, Kirill V.; Tremou, Evangelia; Udalski, Andrej (Astrophysical Journal, 2021)