Elizabeth C. Ferrara

Discovery of Psr J1227-4853: A Transition from a Low-mass X-Ray Binary to a Redback Millisecond Pulsar

XSS J12270-4859 is an X-ray binary associated with the Fermi LAT gamma-ray source 1FGL J1227.9-4852. In 2012 December, this source underwent a transition where the X-ray and optical luminosity dropped and the spectral signatures of an accretion disc disappeared. We report the discovery of a 1.69 millisecond pulsar (MSP), PSR J1227-4853, at a dispersion measure of 43.4 pc cm

The extragalactic gamma-ray sky in the Fermi era

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The bright unidentified gamma-ray source 1FGL J1227.9-4852: Can it be associated with an LMXB?

associated with this source, using the GMRT at 607 MHz. This demonstrates that, post-transition, the system hosts an active radio MSP. This is the third system after PSR J1023+0038 and PSR J1824-2452I showing evidence of state switching between radio MSP and low-mass X-ray binary (LMXB) states. We report timing observations of PSR J1227-4853 with the GMRT and Parkes, which give a precise determination of the rotational and orbital parameters of the system. The companion mass measurement of 0.17 to 0.46 M

The NANOGrav 11-year Data Set: High-precision Timing of 45 Millisecond Pulsars

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PSR J1024–0719: A Millisecond Pulsar in an Unusual Long-period Orbit

suggests that this is a redback system. PSR J1227-4853 is eclipsed for about 40% of its orbit at 607 MHz; with additional short-duration eclipses at all orbital phases. We also find that the pulsar is very energetic, with a spin-down luminosity of ~ 10

Population Syntheses of Millisecond Pulsars from the Galactic Disk and Bulge

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The NANOGrav 11 yr Data Set: Arecibo Observatory Polarimetry and Pulse Microcomponents

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Pulsars in the Mid-Energy Gamma-Ray Band - Implications for ComPair

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XMM-Newton Observations of Fermi-LAT Gamma-Ray Sources

. We report simultaneous imaging and timing observations with the GMRT, which suggests that eclipses are caused by absorption, rather than dispersion smearing or scattering.

Observations of Fermi/LAT Unidentified High Latitude Sources with XMM-Newton

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