J/AJ/120/1 VRI photometry of PDCS survey (Adami+, 2000)
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 2000AJ....120....1A
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 VPDCS, IPDCS, and RCOP 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 [(] Uncertainty flag
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:
COP PDCS NN NN.NN
or COP 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): the abbreviations have the following meaning:
"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
(End) James Marcout, Patricia Bauer [CDS] 11-Sep-2000