Two New Cataclysmic Variables in Lyra

TL;DR

This paper reports the discovery and analysis of two new cataclysmic variables in Lyra, based on historical photographic data, identifying their outburst behaviors and potential classifications.

Contribution

The study introduces two newly identified cataclysmic variables in Lyra and provides detailed analysis of their historical light curves and outburst characteristics.

Findings

One star is a likely dwarf nova of UGSS subtype.

The other star may be a UGWZ dwarf nova or recurrent nova.

Both stars are expected to have future outbursts.

Abstract

I report on the discovery of two cataclysmic variables in the same field in Lyra originally identified from their magnitudes in USNO-B1.0 catalogue and Palomar images. The historical light curves were analyzed on 300+ photographic plates from Moscow collection covering 35 years of observations. One of two stars, USNO-B1.0 1320-0390658, is showing rather frequent outbursts from B~20 to B=15.2 and is likely a dwarf nova of UGSS subtype. The other variable, USNO-B1.0 1321-0397655, has only one observed outburst in 1993 from R~19 to I=11.8 and is either a UGWZ dwarf nova or a recurrent nova. In both cases its next outburst can occur in the nearest future.