NED Abstract 
Copyright by American Astronomical Society.
Reproduced by permission

2006ApJ...638..100K

Discovery of Water Maser Emission in Eight AGNs with 70 m Antennas of
NASA's Deep Space Network 

P. T. Kondratko, L. J. Greenhill, J. M. Moran, J. E. J. Lovell, T. B. H.
Kuiper, D. L. Jauncey, L. B. Cameron, J. F. Gomez, C. Garcia-Miro, E. Moll,
I. de Gregorio-Monsalvo, and E. Jimenez-Bailon 

Abstract. We report the discovery of water maser emission in eight
active galactic nuclei (AGNs) with the 70 m NASA Deep Space Network
(DSN) antennas at Tidbinbilla, Australia, and Robledo, Spain. The
positions of the newly discovered masers, measured with the VLA, are
consistent with the optical positions of the host nuclei to within 1
{sigma} (0.3" radio and 1.3" optical) and most likely mark the locations
of the embedded central engines. The spectra of two sources, NGC 3393
and NGC 5495, display the characteristic spectral signature of emission
from an edge-on accretion disk, with orbital velocities of ~600 and ~400
km s^-1^, respectively. In a survey with DSN facilities of 630 AGNs
selected from the NASA Extragalactic Database, we have discovered a
total of 15 water maser sources. The resulting incidence rate of maser
emission among nearby (v_sys_<7000 km s^-1^) Seyfert 1.8 -- 2.0 and
LINER systems is ~10% for a typical rms noise level of ~14 mJy over 1.3
km s^-1^ spectral channels. As a result of this work, the number of
nearby AGNs (v_sys_<7000 km s^-1^) observed with <20 mJy rms noise has
increased from 130 to 449. 

Key words: Galaxies: Active, galaxies: individual (AM 2158-380 NED02),
(IC 0184), (NGC 0235A), (NGC 0613), NGC 3393, (NGC 4293), (NGC 5495), 
(VII Zw 073), Galaxies: Seyfert, ISM: Jets and Outflows, ISM: Molecules,
Masers
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2006ApJ...649..561K

Erratum: "Discovery of Water Maser Emission in Eight AGNs with 70 m
Antennas of NASA's Deep Space Network" (ApJ, 638, 100 [2006]) 

P. T. Kondratko, L. J. Greenhill, J. M. Moran, J. E. J. Lovell, T. B. H.
Kuiper, D. L. Jauncey, L. B. Cameron, J. F. Gomez, C. Garcia-Miro, E.
Moll, I. de Gregorio-Monsalvo, J. McCallum, and E. Jimenez-Bailon 

J. McCallum was inadvertently omitted from the aurhor list of the
published version of this paper. The correct full author list is given
here.
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