Spectroscopic and Photometric Nearby Field Galaxy Survey

Poster paper presented at IAU Symposium 171, June 26-30 1995, Heidelberg


SPECTRA AND IMAGES

We are in the process of obtaining integrated spectra at higher resolution (4.5-6.0 Å ) and for a larger sample (196) than is available in the literature (e.g. Kennicutt 1992). The FAST spectrograph at the F.L.Whipple Observatory's 60'' Telescope (Mt. Hopkins, Arizona) is mounted with a thinned Loral 2720 x 512 CCD giving a spectral range of either 3250--7250Å or 3600--7500Å at 1.5Å per pixel and a total throughput of telescope, spectrograph and CCD of ~ 55% at 4800Å .
Integrated spectra are obtained by aligning the slit with the major axis of the galaxy, and moving the galaxy across the slit over a total angular distance of 0.5D_25 (the blue isophotal diameter), allowing us to properly weight the faint outer areas of the galaxy. (We reduce the overhead of the current manual instrument rotator by grouping the galaxies by the position angle of the major axis.) To reduce effective read-out-noise we bin the CCD at read-out by 8 pixels in the spatial direction. We also obtain an exposure centered on the nucleus, to determine the nuclear characteristics.
We are also in the process of obtaining B and R filter images using the Loral 2048 x 2048 CCD camera at the Cassegrain focus of the FLWO 48'' Telescope. U images will be obtained later when the thinned 4-Shooter will have become available.


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