First ultraviolet outburst detected from ASASSN-18eh strengthens its interpretation as a cataclysmic variable
Sill Verberne, David Modiano, Rudy Wijnands (on behalf of the TUVO, project)
TL;DR
This paper reports the first ultraviolet outburst detection from ASASSN-18eh, supporting its classification as a cataclysmic variable, specifically a dwarf nova, based on UV observations during an outburst.
Contribution
It presents the first UV outburst detection from ASASSN-18eh, strengthening its identification as a cataclysmic variable with dwarf nova characteristics.
Findings
UV brightness increased by about 6 mag during outburst
Outburst properties are consistent with dwarf nova behavior
Supports the CV classification of ASASSN-18eh
Abstract
As part of the Transient UV Objects project, we have discovered a new outburst (at the beginning of October 2020) of the candidate cataclysmic variable (CV) ASASSN-18eh using the UV/Optical Telescope aboard the Neil Gehrels Swift Observatory. During the outburst its brightness increased by about 6 mag in UV compared to its brightness in the quiescent state. The properties of this outburst are consistent with it being a dwarf nova, strongly supporting the CV nature of ASASSN-18eh.
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