J/A+A/285/785 3C 295 BRri photometry (Thimm+, 1994)
The galaxy population in the cluster Cl 1409+524 (3C 295)
Thimm G.J., Roeser H.-J., Hippelein H., Meisenheimer K.
<Astron. Astrophys. 285, 785 (1994)>
=1994A&A...285..785T 1994A&A...285..785T (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry
Keywords: clusters: Cl 1409+524 (3C 295) - galaxies: evolution -
stars: formation
Abstract:
We observed the cluster Cl 1409+524 (z=0.46) with an imaging
Fabry-Perot interferometer. A sequence of Fabry-Perot images
(FWHM=1.0-1.3nm) was used to search for redshifted
[OII]λ372.7nm- and [OIII]λ500.7nm line emission. We
studied 144 galaxies up to a limiting continuum R-band magnitude of
22.5mag within 1 Mpc around the cluster center. Previously known
emission-line galaxies in the cluster were confirmed and 17 new
members with emission lines were found. Their star formation rate of
1-2M☉/yr is typical for normal spirals. We have imaged the
cluster with broad band B, R and seven intermediate band filters
(FWHM=10.0-20.0nm) in order to derive low-resolution spectral energy
distributions of cluster galaxies. These were fitted by template
spectra to estimate Hubble class and redshifts. Based on this
decomposition, we derived a percentage of emission-line galaxies of
40±11%.
Objects:
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RA (2000) DE Designation(s)
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14 11 20.7 +52 12 09 3C 295 = Cl 1409+524
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
appena.dat 82 143 Results from filter observations of Cl 1409+524
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See also:
J/ApJS/78/1 : Galaxies in 7 clusters 0.35<z<0.55 (Dressler+, 1992)
Byte-by-byte Description of file: appena.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [TRH94] [1/144] Sequential number
5- 11 F7.2 arcsec y y offset according to Fig. 4 (origin: no 62)
13- 19 F7.2 arcsec x x offset according to Fig. 4 (origin: no 62)
21 A1 --- l_Rmag Limit flag on Rmag
22- 26 F5.2 mag Rmag ? R magnitude
28- 31 F4.2 mag B-R ? (B-R) colour index (1)
33- 37 F5.2 mag r-i ? (r-i) color index taken from DG 92;
39- 43 F5.3 --- z ? Redshift obtained with slit spectroscopy
by Dressler & Gunn (1992, Cat. J/ApJS/78/1
44 A1 --- n_z [s] s: star
46 A1 --- l_z2 Limit flag on z2 (2)
47- 51 F5.3 --- z2 ? Redshift obtained from our filter observations
52 A1 --- n_z2 [?] Note on z2 (3)
54- 58 F5.3 --- e_z2 ? rms uncertainty on z2
59 A1 --- nez2 [?] Note on e_z2 (3)
61- 64 A4 --- MType Morphological type
66- 82 A17 --- Rem Remarks
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Note (1): Missing entries appear where photometry was problematic due to
saturation of images, bright neighbouring objects, etc.;
Note (2): In case were the {khi}2-minimisation gives a redshift estimate
outside the investigated range (0.3<z<0.7) it is indicated by a
< and > sing.
Note (3): Entries marked with (?) indicate problems caused by very bright stars
in the neighborhood of that particular object.
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History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 28-May-1999