Skip to main content

ejaavso411114

eJAAVSO

Very Short-Duration UV–B Optical Flares in RS CVn-type Star Systems

pdf    

Gary A. Vander Haagen

Stonegate Observatory, 825 Stonegate Road, Ann Arbor, MI

Received February 11, 2013; revised March 13, 2013; accepted March 15, 2013

Abstract

Very short-duration UV–B optical flares were observed during a high-cadence search for conventional flares on three RS CVn type stars: AR Lac, II Peg, and UX Ari. A statistical criterion was developed for isolating these short-duration optical flares from random photon events. Five flares, ranging in duration from 30 to 85 ms with peaks 0.29–0.51 mag. above the mean, were detected within the 132 hours of monitoring time. The time resolution of the observations was 5 ms for AR Lac and 10 ms for II Peg and UX Ari.

link to article in ADS

Keywords:
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484