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Multiwavelength Properties of the Newly Discovered Dwarf Nova ASASSN-21kt

Sokolovsky, Kirill V.; Mukai, Koji; Lopes de Oliveira, Raimundo +1 more

We report on archival XMM-Newton and post-outburst Swift observations of the newly discovered dwarf nova ASASSN-21kt. Its pre-outburst X-ray emission is consistent with that of a collisionally ionized, thermal plasma with ${kT}={8.1}_{-2.5}^{+10.2}$ keV and L_{X 0.2-12 keV} = 7 × 10³² erg s^-1, with no clear modulation…