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Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations
H. J. Pletsch, L. Guillemot, H. Fehrmann +150
Millisecond pulsars, old neutron stars spun-up by accreting matter from a companion star, can reach high rotation rates of hundreds of revolutions per second. Until now, all such "…
Chandra, Keck and VLA Observations of the Crab Nebula during the 2011-April Gamma-ray Flare
Martin C. Weisskopf, Allyn F. Tennant, Roger Blandford +21
We present results from our analysis of Chandra X-ray Observatory, W. M. Keck Observatory, and Karl G. Jansky Very Large Array (VLA) images of the Crab Nebula that were contemporan…
PSR J1311-3430: A Heavyweight Neutron Star with a Flyweight Helium Companion
Roger W. Romani, Alexei V. Filippenko, Jeffery M. Silverman +5
We have obtained initial spectroscopic observations and additional photometry of the newly discovered Pb=94min gamma-ray black-widow pulsar PSR J1311-3430. The Keck spectra show a…
Radio Detection of the Fermi LAT Blind Search Millisecond Pulsar J1311-3430
P. S. Ray, S. M. Ransom, C. C. Cheung +15
We report the detection of radio emission from PSR J1311-3430, the first millisecond pulsar discovered in a blind search of Fermi Large Area Telescope (LAT) gamma-ray data. We dete…
A Chandra Proper Motion for PSR J1809-2332
Adam Van Etten, Roger W. Romani, C. -Y. Ng
We report on a new Chandra exposure of PSR J1809-2332, the recently discovered pulsar powering the bright EGRET source 3EG J1809-2328. By registration of field X-ray sources in an…
2FGL J1311.7-3429 Joins the Black Widow Club
Roger W. Romani
We have found an optical/X-ray counterpart candidate for the bright, but presently unidentified, Fermi source 2FGL J1311.7-3429. This counterpart undergoes large amplitude quasi-si…
Altitude Limits for Rotating Vector Model Fitting of Pulsar Polarization
H. A. Craig, Roger W. Romani
Traditional pulsar polarization sweep analysis starts from the point dipole rotating vector model (RVM) approximation. If augmented by a measurement of the sweep phase shift, one o…
Radio Searches of Fermi LAT Sources and Blind Search Pulsars: The Fermi Pulsar Search Consortium
P. S. Ray, A. A. Abdo, D. Parent +29
We present a summary of the Fermi Pulsar Search Consortium (PSC), an international collaboration of radio astronomers and members of the Large Area Telescope (LAT) collaboration, w…
Parsec-Scale Radio Properties of Gamma-Ray Emitting Blazars
J. D. Linford, G. B. Taylor, R. W. Romani +4
The parsec-scale radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been investigated using observations with…
Periodic Emission from the Gamma-ray Binary 1FGL J1018.6-5856
The Fermi LAT Collaboration, M. J. Coe, F. Di Mille +5
Gamma-ray binaries are stellar systems containing a neutron star or black hole with gamma-ray emission produced by an interaction between the components. These systems are rare, ev…
Spectroscopy of Broad Line Blazars from 1LAC
Michael S. Shaw, Roger W. Romani, Garret Cotter +7
We report on optical spectroscopy of 165 Flat Spectrum Radio Quasars (FSRQs) in the Fermi 1LAC sample, which have helped allow a nearly complete study of this population. Fermi FSR…