Publications (24)
The Megamaser Cosmology Project: IV. A Direct Measurement of the Hubble Constant from UGC 3789
M. J. Reid, J. A. Braatz, J. J. Condon +4
Narrow-line Seyfert 1 galaxies: an amasing class of AGN
A. Tarchi, P. Castangia, A. Columbano +2
The Megamaser Cosmology Project VIII. A Geometric Distance to NGC 5765b
F. Gao, J. A. Braatz, M. J. Reid +7
The density, the cosmic microwave background, and the proton-to-electron mass ratio in a cloud at redshift 0.9
C. Henkel, K. M. Menten, M. T. Murphy +6
A Green Bank Telescope Search for Water Masers in Nearby Active Galactic Nuclei
J. A. Braatz, C. Henkel, L. J. Greenhill +2
H2O megamasers: Accretion disks, jet interaction, outflows or massive star formation?
C. Henkel, J. A. Braatz, A. Tarchi +5
The Ionization Fraction in the Obscuring `Torus' of an Active Galactic Nucleus
A. S. Wilson, A. L. Roy, J. S. Ulvestad +8
The Megamaser Cosmology Project. VI. Observations of NGC 6323
C. Y. Kuo, J. A. Braatz, K. Y. Lo +6
Cosmology and the Hubble Constant: On the Megamaser Cosmology Project (MCP)
C. Henkel, J. A. Braatz, M. J. Reid +4
Ammonia (J,K) = (1,1) to (4,4) and (6,6) inversion lines detected in the Seyfert 2 galaxy NGC 1068
Y. Ao, C. Henkel, J. A. Braatz +3
A Survey for H2O Megamasers III. Monitoring Water Vapor Masers in Active Galaxies
J. A. Braatz, A. S. Wilson, C. Henkel +2
Precise Black Hole Masses From Megamaser Disks: Black Hole-Bulge Relations at Low Mass
J. E. Greene, C. Y. Peng, M. Kim +7
The Megamaser Cosmology Project: I. VLBI observations of UGC 3789
M. J. Reid, J. A. Braatz, J. J. Condon +3
Extragalactic H_2O masers and X-ray absorbing column densities
J. S. Zhang, C. Henkel, M. Kadler +4
The kinetic temperature of a molecular cloud at redshift 0.9: Ammonia in the gravitational lens PKS1830-211
C. Henkel, J. A. Braatz, K. M. Menten +1
The Discovery of Water Maser Emission from Eight Nearby Galaxies
J. A. Braatz, N. E. Gugliucci
H_2O megamaser emission from FR I radio galaxies
C. Henkel, Y. P. Wang, H. Falcke +2
The Megamaser Cosmology Project. III. Accurate Masses of Seven Supermassive Black Holes in Active Galaxies with Circumnuclear Megamaser Disks
C. Y. Kuo, J. A. Braatz, J. J. Condon +7
Ammonia as a Tracer of Fundamental Constants
C. Henkel, K. M. Menten, M. T. Murphy +5
A Survey for H$_2$O Megamasers in Active Galactic Nuclei -- II. A Comparison of Detected and Undetected Galaxies
J. A. Braatz, A. S. Wilson, C. Henkel
Discovery of water vapor megamaser emission from Mrk1419 (NGC 2690): An analogue of NGC 4258?
C. Henkel, J. A. Braatz, L. J. Greenhill +1
X-ray Emission from the Prototypical LINER Galaxy NGC 1052
K. A. Weaver, A. S. Wilson, C. Henkel +1
The Megamaser Cosmology Project. II. The Angular-Diameter Distance to UGC 3789
J. A. Braatz, M. J. Reid, E. M. L. Humphreys +3
New H2O masers in Seyfert and FIR bright galaxies
C. Henkel, A. B. Peck, A. Tarchi +4