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Signatures of Intra-binary shock emission in the black widow pulsar binary PSR J2241-5236
Hongjun An, Roger W. Romani, Matthew Kerr
We report on high-energy properties of the black widow pulsar PSR J22415236 in the X-ray and the Fermi-LAT (GeV gamma-ray) bands. In the LAT band, the phase-averaged gamma-ray l…
Multiwavelength Cross-Correlations and Flaring Activity in Bright Blazars
I. Liodakis, R. W. Romani, A. V. Filippenko +4
Blazars are known for their energetic multiwavelength flares from radio wavelengths to high-energy -rays. In this work, we study radio, optical, and -ray light curves of 145…
The Polarization Behavior of Relativistic Synchrotron Jets
A. L. Peirson, Roger W. Romani
We describe a geometric model for synchrotron radiation from blazar jets, involving multiple emission zones with turbulent magnetic fields and a transient core with a helical B fie…
PSR J0636+5128: A Heated Companion in a Tight Orbit
Paul Draghis, Roger W. Romani
We present an analysis of archival Gemini g', r', K and Keck H, K_s imaging of this nearby short period binary (P_B=95.8min) 2.87ms pulsar. The heated companion is clearly detected…
Einstein@Home discovers a radio-quiet gamma-ray millisecond pulsar
C. J. Clark, H. J. Pletsch, J. Wu +18
Millisecond pulsars (MSPs) are old neutron stars that spin hundreds of times per second and appear to pulsate as their emission beams cross our line of sight. To date, radio pulsat…
SED constraints on the highest- blazar jet: QSO J0906+6930
Hongjun An, Roger W. Romani
We report on Gemini, NuSTAR and 8-year Fermi observations of the most distant blazar QSO~J09066930 (). We construct a broadband spectral energy distribution (SED) and mo…