Near-Infrared Spectroscopy of Seyfert 1 Nucleus NGC 4151

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Session 108 -- Seyfert Galaxies
Display presentation, Thursday, 12, 1995, 9:20am - 6:30pm

[108.02] Near-Infrared Spectroscopy of Seyfert 1 Nucleus NGC 4151

R.A.Knop, L.Armus, J.E.Larkin, K.Matthews, D.Shupe, B.T.Soifer (Caltech)

We have constructed a near-infrared 1.0-3.5 $\mu$m spectrometer for use with the Hale 5m telescope at Palomar Observatory. The spectrometer has two gratings: a medium resolution grating with $\lambda/\delta\lambda\sim$1000 with a 2/3'' slit, and a high resolution grating with $\lambda/\delta\lambda\sim$4000 with a 2/3'' s;ot. The spectrometer itself does not have a detector, but rather functions as a reimager, using the current Palomar near-infrared cassegrain camera as a detector. The spectrometer has a slit which is 40'' long and continuously ajustable in width between 0'' and 10''. The spectrometer also has an imaging mode with a maximum field of view of 10''$\times$40''. This poster presents some first results from the spectrometer, medium resolution 1.24$\mu$m-1.30$\mu$m and 2.09$\mu$m-2.21$\mu$m spectra of the nuclear regions of the Seyfert 1 galaxy NGC 4151. Pa$\beta$, Br$\gamma$, [FeII], and HeI lines were seen in the galaxy, including a strong broad ($\sim$7000 km/s) component of Pa$\beta$. Lines were seen spatially extended over 5'' or more, and there are velocity gradients in the lines of more than 300 km/s.

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