IAU00059
Presentation type requested: ORAL
BYURAKAN-IRAS GALAXIES: SURVEY FOR FIR FLUX LIMITED OBJECTS
Areg M Mickaelian
Byurakan Astrophysical Observatory (BAO)
A program of optical identifications of all IRAS sources in a large area ($|b|>15^{\circ}$ and $\delta>+61^{\circ}$) on the basis of the First Byurakan Survey (FBS) low-dispersion spectra is aimed at revealing all FIR flux limited (0.6 Jy at 60 \mu, and 1.0 Jy at 100 \mu, i. e. the IRAS PSC completeness limit) objects and study its contents. 1577 previously unidentified IRAS point sources have been optically identified in an area with 1487 sq. deg., of which 1178 are galaxies, and 399 are stars. The identifications program brought to 2 samples of objects: BIS (Byurakan-IRAS Stars), and BIG (Byurakan-IRAS Galaxies). A redshift survey for BIG objects have been undertaken with 3 telescopes (Byurakan 2.6m, SAO (Russian) 6m, and Haute-Provence 1.93m): 229 galaxies have been observed so far, and their redshifts and activity types are available. The BIG objects contain Seyferts, LINERs, composite spectrum AGNs, high-luminosity IR galaxies, groups of galaxies, interacting and merging galaxies, as well as obscured IRAS galaxies. The redshifts are in the range 0.008-0.173, and the obtained FIR is in the range $3\times10^{9}<L_{fir}/L_{\odot}<7.5\times10^{12}. Some of the interesting BIG objects have been studied in details with the 2D spectroscopy.
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