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|Accurate Positions for MCG Galaxies|
We have measured accurate celestial coordinates for 4741 extragalacticobjects, primarily drawn from a list of MCG galaxies with no recentlypublished accurate positions. The standard deviations in the newpositions depend slightly on the measurement method but are on the orderof 1.0" to 1.2". Standard deviations in the original MCG positions areconfirmed to be at the 1.5′-2.0′ level. These new positionswere integrated into NED in 1997 December.
|Infrared properties of OH galaxies|
The IR properties of OH megamasers are analyzed, emphasizing thedifferences between the OH-emitting and OH-absorbing sources. Aquadratic L(OH)-L(IR) relationship rather than a linear one is found forthe observed megamasers. Such a relationship can be easily understood interms of a low-gain amplification model.
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