Extended TeV Halos May Commonly Exist around Middle-Aged Pulsars
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Albert, A. (ORCID:0000000301975646)↗
Engineering topics
Ruiz-Velasco, E. (ORCID:0000000169397825)
Publications and source records attributed to Ruiz-Velasco, E. (ORCID:0000000169397825).
γ-Ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC
This paper reports on the γ -ray properties of the 2018 Galactic nova V392 Per, spanning photon energies ~0.1 GeV–100 TeV by combining observations from the Fermi Gamma-ray Space Telescope and the HAWC Observatory. As one of the most rapidly evolving γ -ray signals yet observed for a nova, GeV γ -rays with a power-law spectrum with an index Γ = 2.0 ± 0.1 were detected over 8 days following V392 Per’s optical maximum. HAWC observations constrain the TeV γ -ray signal during this time and also before and after. We observe no statistically significant evidence of TeV γ -ray emission from V392 Per, but present flux limits. Tests disfavor the extension of the Fermi Large Area Telescope spectrum to energies above 5 TeV by 2 standard deviations (95%) or more. We fit V392 Per’s GeV γ -rays with hadronic acceleration models, incorporating optical observations, and compare the calculations with HAWC limits.
79 ASTRONOMY AND ASTROPHYSICS↗