Missed 2020 Superoutburst of the Eclipsing WD-BD Cataclysmic Variable SDSS J1433+1011

TL;DR

This paper reports the discovery of a missed superoutburst in 2020 from the eclipsing WD-BD cataclysmic variable SDSS J1433+1011, confirming its dwarf nova nature with a brown dwarf secondary through survey data analysis.

Contribution

It reveals a previously undetected superoutburst in 2020, demonstrating the importance of survey data in identifying transient events in faint cataclysmic variables.

Findings

Confirmed the dwarf nova nature of SDSS J1433+1011

Discovered a missed superoutburst in September 2020

Highlighted the value of professional and amateur survey data

Abstract

Cataclysmic variable SDSS J143317.78+101123.3 with P=0.054241 d (78.1-min) was suspected to be a possible dwarf nova of WZ Sge type with the sub-stellar donor, but without detected outbursts so far. Checking the newly available data from ATLAS survey has revealed the outburst by at least 6 magnitudes in September 2020, thus confirming the dwarf nova nature of this object with the brown dwarf secondary. Other projects and individual observers have stopped their monitoring of this target several days before the outburst. This finding strengthens the value of observing the twilight zone by the professional surveys and amateurs.