Long-term Optical Activity of the Hard X-ray Flaring Star DG CVn

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00480923" target="_blank" >RIV/67985815:_____/17:00480923 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21230/17:00315156
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Long-term Optical Activity of the Hard X-ray Flaring Star DG CVn
Original language description
DG CVn is a young late-type star which displayed an X-ray and optical super flare in 2014. This paper presents an analysis of the long-term activity of this object in the optical band. I used the photographic data from DASCH (Digital Access to a Sky Century @ Harvard). These measurements from the years 1895-1989 cover the blue spectral region. CCD V-band ASAS data were used for several UV Cettype stars to place the activity of DC CVn in the context of flaring stars. I show that three large brightenings (flares) of DG CVn by more than 1 mag were detected on the DASCH plates. The character of the long-term activity (regarding the histogram of brightness) of DG CVn is compatible with those of flaring stars UV Cet and V371 Ori. The flares brighter than similar to 0.4 mag represent less than 1 percent of the observed data in all three objects.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GC13-39464J" target="_blank" >GC13-39464J: Digitizing Astronomical Plate Archives and Investigation of Celestial Sources in Digitized Plate Archives</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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