Timing the arrival of pulsar light is a critical tool for scrutinizing the characteristics of the interstellar medium (ISM) and the pulsar itself. Pulsar timing is affected by factors such as the solar system's kinematics, turbulence in the ISM, and intrinsic timing noise inherent to each pulsar. The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) maintains a catalog of high-precision timing for millisecond pulsars. Using NANOGrav pulsars, and accounting for relative time-of-arrival (TOA) differences within observation epochs, the remaining noise in the TOA can be parsed out to just the jitter innate to the pulsar. This research utilizes wide band radio observations by the Very Large Array of NANOGrav pulsars to detail the characteristics of pulsar jitter, explore frequency dependence of apparent jitter measurements, and characterize other signal-dependent contributions to the timing white noise.

Library of Congress Subject Headings

Pulsars--Observations; Radio astronomy; Interstellar matter

Publication Date


Document Type


Student Type


Degree Name

Physics (MS)

Department, Program, or Center

School of Physics and Astronomy (COS)


Michael Lam

Advisor/Committee Member

Jeyhan Kartaltepe

Advisor/Committee Member

George Thurston


RIT – Main Campus

Plan Codes