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MeV-GeV Gamma-ray Emission from SNR G327.1-1.1 Discovered by the Fermi-LAT
Jordan Eagle, Daniel Castro, Tea Temim +5
We report the discovery of MeV-GeV gamma-ray emission by the Fermi-LAT positionally coincident with the TeV pulsar wind nebula (PWN) HESS~J1554-550 within the host supernova remnan…
A New Flaring Black Widow Candidate and Demographics of Black Widow Millisecond Pulsars in the Galactic Field
Samuel J. Swihart, Jay Strader, Laura Chomiuk +4
We present the discovery of a new optical/X-ray source likely associated with the Fermi -ray source 4FGL J1408.6-2917. Its high-amplitude periodic optical variability, large spe…
Evidence for PeV Proton Acceleration from Fermi-LAT Observations of SNR G106.3+2.7
Ke Fang, Matthew Kerr, Roger Blandford +2
The existence of a "knee" at energy ~1 PeV in the cosmic-ray spectrum suggests the presence of Galactic PeV proton accelerators called "PeVatrons". Supernova Remnant (SNR) G106.3+2…
Evaluating the prevalence of spurious correlations in pulsar timing array datasets
Andrew Zic, George Hobbs, R. M. Shannon +13
Pulsar timing array collaborations have recently reported evidence for a noise process with a common spectrum among the millisecond pulsars in the arrays. The spectral properties o…
Fermi-LAT Gamma-ray Detection of the Recurrent Nova RS Ophiuchi during its 2021 Outburst
C. C. Cheung, T. J. Johnson, P. Jean +15
We report the Fermi-LAT gamma-ray detection of the 2021 outburst of the symbiotic recurrent nova RS Ophiuchi. In this system, unlike classical novae from cataclysmic binaries, the…
Consistency of the Parkes Pulsar Timing Array Signal with a Nanohertz Gravitational-wave Background
Boris Goncharov, Eric Thrane, Ryan M. Shannon +9
Pulsar timing array experiments have recently reported strong evidence for a common-spectrum stochastic process with a strain spectral index consistent with that expected of a nano…