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Cheung, C. C.; Jean, P.; Knödlseder, J.; Shore, S. N.; Pivato, G.; Stawarz, Ł.; Corbet, R. H. D.; Starrfield, S.; Wood, D. L.; Wood, K. S.; Desiante, R.; Longo, F.
The Astrophysical journal, 08/2016, Letnik: 826, Številka: 2Journal Article
We report the Fermi Large Area Telescope (LAT) detections of high-energy (>100 MeV) γ -ray emission from two recent optically bright classical novae, V1369 Centauri 2013 and V5668 Sagittarii 2015. At early times, Fermi target-of-opportunity observations prompted by their optical discoveries provided enhanced LAT exposure that enabled the detections of γ -ray onsets beginning ∼2 days after their first optical peaks. Significant γ -ray emission was found extending to 39–55 days after their initial LAT detections, with systematically fainter and longer-duration emission compared to previous γ -ray-detected classical novae. These novae were distinguished by multiple bright optical peaks that encompassed the time spans of the observed γ -rays. The γ -ray light curves and spectra of the two novae are presented along with representative hadronic and leptonic models, and comparisons with other novae detected by the LAT are discussed.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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