Fermi/LAT detection of a transient gamma-ray flare in the vicinity of the binary star DG CVn
Abstract
Solar flares are regularly detected by the Large Area Telescope (LAT) on board the Fermi satellite, however no γ-ray emission from other stellar eruptions has ever been captured. The Swift detection in 2014 April of a powerful outburst originating from DG CVn, with associated optical and radio emissions, enticed us to search for possible 0.1–100 GeV emission from this flaring nearby binary star using the Fermi/LAT. No γ-ray emission is detected from DG CVn in 2014, but we report a significant γ-ray excess in 2012 November, at a position consistent with that of the binary. There are no reports of contemporary flaring at other wavelengths from DG CVn or any other source within the error circle of the γ-ray source. As a result, we argue that the γ-ray flare is more likely to have been associated with a background blazar than with DG CVn and identify a candidate for follow-up study.
- Authors:
-
- Lab. AIM (CEA/IRFU - CNRS/INSU - Univ. Paris Diderot), Gif-sur-Yvette (France)
- Lab. AIM (CEA/IRFU - CNRS/INSU - Univ. Paris Diderot), Gif-sur-Yvette (France); Univ. Orleans, Nancay (France)
- Univ. Grenoble Alpes, Grenoble (France); CNRS, IPAG, Grenoble (France)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1355725
- Grant/Contract Number:
- ANR-12-BS05-0009; AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Volume: 467; Journal Issue: 4; Journal ID: ISSN 0035-8711
- Publisher:
- Royal Astronomical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; acceleration of particles; stars: flare; stars: individual (DG CVn); gamma-rays: stars
Citation Formats
Loh, Alan, Corbel, Stéphane, and Dubus, Guillaume. Fermi/LAT detection of a transient gamma-ray flare in the vicinity of the binary star DG CVn. United States: N. p., 2017.
Web. doi:10.1093/mnras/stx396.
Loh, Alan, Corbel, Stéphane, & Dubus, Guillaume. Fermi/LAT detection of a transient gamma-ray flare in the vicinity of the binary star DG CVn. United States. https://doi.org/10.1093/mnras/stx396
Loh, Alan, Corbel, Stéphane, and Dubus, Guillaume. Thu .
"Fermi/LAT detection of a transient gamma-ray flare in the vicinity of the binary star DG CVn". United States. https://doi.org/10.1093/mnras/stx396. https://www.osti.gov/servlets/purl/1355725.
@article{osti_1355725,
title = {Fermi/LAT detection of a transient gamma-ray flare in the vicinity of the binary star DG CVn},
author = {Loh, Alan and Corbel, Stéphane and Dubus, Guillaume},
abstractNote = {Solar flares are regularly detected by the Large Area Telescope (LAT) on board the Fermi satellite, however no γ-ray emission from other stellar eruptions has ever been captured. The Swift detection in 2014 April of a powerful outburst originating from DG CVn, with associated optical and radio emissions, enticed us to search for possible 0.1–100 GeV emission from this flaring nearby binary star using the Fermi/LAT. No γ-ray emission is detected from DG CVn in 2014, but we report a significant γ-ray excess in 2012 November, at a position consistent with that of the binary. There are no reports of contemporary flaring at other wavelengths from DG CVn or any other source within the error circle of the γ-ray source. As a result, we argue that the γ-ray flare is more likely to have been associated with a background blazar than with DG CVn and identify a candidate for follow-up study.},
doi = {10.1093/mnras/stx396},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 4,
volume = 467,
place = {United States},
year = {Thu Feb 16 00:00:00 EST 2017},
month = {Thu Feb 16 00:00:00 EST 2017}
}
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