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25 papers · 2 filters
Multiwavelength Observations of the Previously Unidentified Blazar RX J0648.7+1516
E. Aliu, T. Aune, M. Beilicke +84
We report on the VERITAS discovery of very-high-energy (VHE) gamma- ray emission above 200 GeV from the high-frequency-peaked BL Lac object RXJ0648.7+1516 (GBJ0648+1516), associate…
Pulsed Gamma Rays from the Original Millisecond and Black Widow Pulsars: a case for Caustic Radio Emission?
L. Guillemot, T. J. Johnson, C. Venter +25
We report the detection of pulsed gamma-ray emission from the fast millisecond pulsars (MSPs) B1937+21 (also known as J1939+2134) and B1957+20 (J1959+2048) using 18 months of surve…
Millihertz quasi-periodic oscillations and thermonuclear bursts from Terzan 5: A showcase of burning regimes
M. Linares, D. Altamirano, D. Chakrabarty +2
We present a comprehensive study of the thermonuclear bursts and millihertz quasi-periodic oscillations (mHz QPOs) from the neutron star (NS) transient and 11 Hz X-ray pulsar IGR J…
Long-Term X-ray Monitoring of the Young Pulsar PSR B1509-58
Margaret A. Livingstone, Victoria M. Kaspi
It has long been thought that the pulsed X-ray properties of rotation-powered pulsars are stable on long time scales. However, long-term, systematic studies of individual sources h…
The Spin-down of Swift J1822.3-1606: A New Galactic Magnetar
Margaret A. Livingstone, Paul Scholz, Victoria M. Kaspi +2
On 2011 July 14, a new magnetar candidate, Swift J1822.3-1606, was identified via a rate trigger on the Swift/Burst Alert Telescope. Here we present an initial analysis of the X-ra…
Constraining Radio Emission from Magnetars
Patrick Lazarus, Victoria M. Kaspi, David J. Champion +2
We report on radio observations of five magnetars and two magnetar candidates carried out at 1950 MHz with the Green Bank Telescope in 2006-2007. The data from these observations w…