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IRAS

Infrared Astronomical Satellite, IRAS

Product Name
Large Optical Galaxies
Mission
IRAS

Description

The "Large Galaxy Catalog" contains IRAS observations of 85 galaxies listed in RC2 with apparent blue light isophotal diameters (D_25) greater than 8'. Surface brightness maps at 12, 25, 60 and 100 microns are given in FITS format for each galaxy. There are only 83 sets of maps because NGC 205 and M 31 are in one field, as are M 81 and M 82. The maps were made using Pointed Observation data when these were available. An estimate of the diffuse zodiacal plus Galactic emission, derived locally, is subtracted in each case. Rice et al. (1988) describe the data processing method, present a table of attributes of the maps (galaxy name, map center coordinates and dimensions, pixel sizes, and noise estimates), and give total galactic flux densities. A separate IPAC Report by Rice and Kopan (1988) serves as a user's guide to the data product.


References:
de Vaucouleurs, G., de Vaucouleurs, A., & Corwin, H. 1976, Second Reference Catalog of Bright Galaxies (Austin: Univ. of Texas Press). (RC2)

Rice, W. L. and Kopan, E. L. 1988, "IRAS Surface Brightness Maps of Large Optical Galaxies," IPAC Report, 15 February 1988.

Rice, W. L., Lonsdale, C. J., Soifer, B. T., Neugebauer, G., Kopan, E. L., Lloyd, L. A., de Jong, T., & Habing, H. J. 1988, ApJS, 68, 91.

Version and release date: 1.0, 1988 Mar

Large Optical Galaxies

Sample FITS header

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A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason