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Issue A&A
Volume 389, Number 3, July III 2002
Page(s) 787 - 794
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20020624



A&A 389, 787-794 (2002)
DOI: 10.1051/0004-6361:20020624

Optical ( $\!$ VRI ) photometry in the field of the galaxy cluster AC 118 at $z=\mathsf{0.31}$

G. Busarello1, P. Merluzzi1, F. La Barbera2, M. Massarotti1 and M. Capaccioli1, 2

1  I.N.A.F., Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli
2  Università Federico II, Department of Physics, Napoli

(Received 18 February 2002 / Accepted 18 April 2002)

Abstract
We present new photometric V-, R- and I-band data for the rich galaxy cluster AC 118 at z=0.31. The new photometry covers an area of $8.6\times8.6$ arcmin 2, corresponding to $2.9\times2.9$ Mpc 2 ( H0=50 km s -1 Mpc -1, q0=0.5 and $\Lambda = 0$). The data have been collected for a project aimed at studying galaxy evolution through the color-magnitude relation and the fundamental plane. We provide a catalogue including all the sources ( N = 1206) detected in the cluster field. The galaxy sample is complete to V=22.8 mag ( $N_{\rm gal}=574$), R=22.3 mag ( $N_{\rm gal}=649$) and I=20.8 mag ( $N_{\rm gal}=419$). We give aperture magnitudes within a fixed aperture of 4.4 arcsec and Kron magnitudes. We also give photometric redshifts for 459 sources for which additional U- and K-band photometry is available. We derive and discuss the V- and R-band luminosity functions. The catalogue, which is distributed in electronic form, is intended as a tool for studies in galaxy evolution.


Key words: galaxies: clusters: individual: AC 118 -- galaxies: photometry -- galaxies: fundamental parameters (magnitudes, colors) -- galaxies: luminosity function

Offprint request: G. Busarello, gianni@na.astro.it

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© ESO 2002


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