Cataclysmic Variables from USNO-B1.0 Catalog: Stars with Outbursts on Infrared Palomar Plates

TL;DR

This study identifies 27 variable stars, including 7 new discoveries, using infrared magnitudes from the USNO-B1.0 catalog, highlighting a new method for finding cataclysmic variables and pulsating stars.

Contribution

The paper introduces a novel search technique for cataclysmic variables using infrared data, successfully discovering new variable stars and confirming the nature of previously suspected objects.

Findings

27 variable objects identified, including 7 new discoveries

4 dwarf novae and 3 pulsating red variables found

Confirmed pulsation periods and dwarf nova nature for some stars

Abstract

The search was performed for cataclysmic variable stars with outlying infrared magnitudes in USNO-B1.0 catalog. The selection was limited to objects in the Northern hemisphere with (B1-R1) < 1 and (R2-I) > 3.5. The search method is described, and the details on individual stars are given. In total 27 variable objects were found with 20 being the previously known ones and 7 - new discoveries. 4 of newly found variables are dwarf novae, while the remaining 3 - pulsating red variables of Mira or semi-regular types, including a heavily reddened one in Pelican nebula. The correct pulsation period is determined for two stars discovered by other researchers, and the dwarf nova nature is confirmed for another object previously suspected as such. The perspectives of the proposed search technique in the framework of Virtual Observatory are also discussed.