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The Atlas of Peculiar Galaxies catalogs 338 fields with a total
of 591 galaxies, consisting of unusual or peculiar appearing
galaxies, interacting galaxies, and galaxy groups1.
Arp selected the galaxies in his catalog from an earlier work by
Zwicky and Vorontsov-Velyaminov. All his imaging was done using
the 200-inch telescope at Mount Palomar. Most of the objects in
Arp’s galaxy list also have Messier, NGC, IC, or UGC
designations2. Arp classified his collection of
peculiar galaxies as follows:
I. Spiral Galaxies (Arp1-Arp36)
II. Spiral Galaxies with Companions on Arms (Arp37-101)
III. Elliptical and Elliptical-like Galaxies
(Arp102-Arp145)
IV. Galaxies not Spiral or Elliptical (Arp146-268)
V. Galaxies Listed by Group Characteristics
(Arp269-232)
VI. Miscellaneous (Arp233-238)
For each major category, there are a variety of subcategories.
This project consists of images of selected Arp galaxies from
most of these major categories. For the galaxies selected,
tri-color CCD images illustrate important features about the
galaxies and their environment.
Equipment and Observations
This project utilized the 60cm (24-inch) f/5 Newtonian telescope
at the Grasslands Observatory. Images were taken with a
Finger Lakes
Instrumentation Dream Machine CCD camera combined with a
Finger Lakes CFW-1 Color Filter Wheel using Johnson-Cousins R,
V, B filters3,4. The Dream Machine provides a
28-arcminute field of view with the 24-inch f/5 Newtonian
telescope at the Grasslands Observatory, and it is run with
MaxIm
DL/CCD5. The Dream Machine CCD camera creates
images that are over two megabytes in size. These are read from
the CCD camera over a network from the observatory floor to a
computer in a separate Control Room. The raw data is stored on a
computer in the Control Room and is also archived on CD-ROMs. |
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