405 citations · 623 across the 13 of their papers we have counts for
18 papers
The Importance of Co-located VLBI Intensive Stations and GNSS Receivers: A case study of the Maunakea VLBI and GNSS stations during the 2018 Hawai`i earthquake
Christopher Dieck, Megan C. Johnson, Daniel S. MacMillan
Frequent, low-latency measurements of the Earth's rotation phase, UT1UTC, critically support the current estimate and short-term prediction of this highly variable Earth Orienta…
FRAMEx II: Simultaneous X-ray and Radio Variability in Active Galactic Nuclei The Case of NGC 2992
Luis C. Fernandez, Nathan J. Secrest, Megan C. Johnson +4
Using simultaneous Very Long Baseline Array and Neil Gehrels Swift Observatory X-ray Telescope observations of the active galactic nucleus (AGN) in NGC 2992 over a six-month observ…
Imaging Sources in the Third Realization of the International Celestial Reference Frame
Lucas R. Hunt, Megan C. Johnson, Phillip J. Cigan +2
The third iteration of the International Celestial Reference Frame (ICRF3) is made up of 4536 quasars observed at S/X bands using Very Long baseline Interferometry (VLBI). These so…
Tully-Fisher Distances and Dynamical Mass Constraints for 24 Host Galaxies of Reverberation-Mapped AGN
Justin H. Robinson, Misty C. Bentz, Hélène M. Courtois +6
We present Tully-Fisher distances for 24 AGN host galaxies with black hole mass () measurements from reverberation mapping, as well as the first calibration of the $…
Fundamental Reference AGN Monitoring Experiment (FRAMEx) I: Jumping Out of the Plane with the VLBA
Travis C. Fischer, Nathan J. Secrest, Megan C. Johnson +7
We present the first results from the Fundamental Reference AGN Monitoring Experiment (FRAMEx), an observational campaign dedicated to understanding the physical processes that aff…
Detection of a Radio Bubble around the Ultraluminous X-ray Source Holmberg IX X-1
Ciprian T. Berghea, Megan C. Johnson, Nathan J. Secrest +3
We present C and X-band radio observations of the famous utraluminous X-ray source (ULX) Holmberg IX X-1, previously discovered to be associated with an optical emission line nebul…