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J/AJ/120/1 VRI photometry of PDCS survey (Adami+, 2000)
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The Canada-France-Hawaii telescope optical PDCS survey (COP). I. The data.
Adami C., Holden B.P., Castander F.J., Nichol R.C., Mazure A., Ulmer M.P.,
Postman M., Lubin L.M.
<Astron. J. 120, 1 (2000)>
=2000AJ....120....1A (SIMBAD/NED BibCode)
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ADC_Keywords: Surveys ; Clusters, galaxy ; Photometry, VRI
Keywords: cosmology: observations - galaxies: clusters: general -
large-scale structure of universe
Abstract:
This paper presents the COP (CFHT optical PDCS; CFHT:
Canada-France-Hawaii Telescope, PDCS: Palomar Distant Cluster Survey)
survey data. We describe our photometric and spectroscopic
observations with the multiobject spectrograph (MOS) at the CFHT. A
comparison of the photometry from the PDCS catalogs and from the new
images we have obtained at the CFHT shows that the different magnitude
systems can be cross-calibrated. After identification between the PDCS
catalogs and our new images, we built catalogs with redshift,
coordinates, and V_PDCS_, I_PDCS_, and R_COP_ magnitudes. We have
classified the galaxies along the lines of sight into field and
structure galaxies using a gap technique from Katgert et al. In total
we have observed 18 significant structures along the 10 lines of
sight.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables.dat 73 635 Data for the line-of-sight (tables 6-15)
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Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- PDCS PDCS number (1)
7- 11 F5.2 --- No Observed galaxy sequence (2)
13 I1 --- Gr Field/group classification (3)
15- 21 F7.5 --- z ? Redshift (4)
22 A1 --- u_z [(]
23- 29 F7.5 --- e_z ? rms uncertainty on z
31- 38 F8.1 arcsec RAarcsec Right ascension (J2000.0)
40- 47 F8.1 arcsec DEarcsec Declination (J2000.0)
49- 53 F5.2 mag Vmag ?=99.99 PDCS V magnitude
55- 59 F5.2 mag Imag ?=99.99 PDCS I magnitude
61- 65 F5.2 mag Rmag ?=99.99 PDCS R magnitude
67- 73 A7 --- Type Spectral features (5)
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Note (1): In Simbad, objects are identified as:
[AHC2000] PDCS NN NN.NN
or [AHC2000] PDCS 30-45 NN.NN for PDCS 30/45
Note (2): 58.1 means 58th galaxy observed in mask 1
Note (3): 0 means field galaxy, 1 means first group, etc.
Note (4): The last digit is given only for information, but is not significant
according to the error
For PDCS 1.42, this galaxy exhibits a single broadband emission
line, probably from a quasar. The cross-correlation technique
provides, however, with the absorption-line features, a redshift
equal to 0.57801+/-0.00049.
Note (5): "em" means redshift from emission lines only;
"ea" means redshift from emission lines but consistent with
absorption line features;
an empty cell means redshift from absorption line features only.
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History: From AJ electronic version
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(End) James Marcout, Patricia Bauer [CDS] 11-Sep-2000