Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-04-06
Astron.J.116:1-7,1998
Astronomy and Astrophysics
Astrophysics
20 pages, uses AASTeX 4.0 macros. Includes 3 tables and 4 Postscripts figures. Scheduled for publication in the AJ 1998 July i
Scientific paper
10.1086/300410
We report redshifts, magnitudes and morphological classifications for 5369 galaxies with $m_B \leq 15.5$ and 57 galaxies fainter than this limit, in two regions covering a total of 1.70 steradians in the southern celestial hemisphere. The galaxy catalog is drawn primarily from the list of non-stellar objects identified in the Guide Star Catalog (Lasker et al. 1990, AJ 99, 2019; hereafter GSC). The galaxies have positions accurate to about 1 arc sec and magnitudes with an rms scatter of about 0.3 mag. We compute magnitudes ($m_{SSRS2}$) from the relation between instrumental GSC magnitudes and the photometry by Lauberts & Valentijn (1989). From a comparison with CCD photometry, we find that our system is homogeneous across the sky and corresponds to magnitudes measured at the isophotal level $\sim$ 26 mag arcsec$^{-2}$. The precision of the radial velocities is of \sim 40 km/s and the redshift survey is more than 99% complete to the $m_{SSRS2}$ = 15.5 magnitude limit. This sample is in the direction opposite to the CfA2; in combination the two surveys provide an important database for studies of the properties of galaxies and their large-scale distribution in the nearby Universe.
Chaves O. L.
da Costa Luiz Nicolaci
Fairall Anthony P.
Geller Margaret J.
Huchra John P.
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