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

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https://iopscience.iop.org/article/10.3847/2515-5172/ac19a3

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http://hdl.handle.net/11603/22536

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UMBC Physics Department
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https://orcid.org/0000-0002-8286-8094

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2021-08

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journal articles
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Bandeira, Victor et al.; Multiwavelength Properties of the Newly Discovered Dwarf Nova ASASSN-21kt; Research Notes of the AAS, Volume 5, Number 8, August 2021; https://doi.org/10.3847/2515-5172/ac19a3

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Abstract

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⁺¹⁰˙²₋₂.₅ keV and Lᵪ₀.₂₋₁₂ₖₑᵥ = 7 × 10³² erg s⁻¹, with no clear modulation. Multiple optical outbursts revealed by Gaia and time evolution of the last one followed by the All-Sky Automated Survey for Supernovae, and X-ray properties presented here support the dwarf nova classification of ASASSN-21kt.