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J/ApJS/129/475 The CNOC2 survey. I. (Yee+, 2000)
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The CNOC2 field galaxy redshift survey. I.
The survey and the catalog for the patch CNOC 0223+00.
Yee H.K.C., Morris S.L., Lin H., Carlberg R.G., Hall P.B., Sawicki M.,
Patton D.R., Wirth G.D., Ellingson E., Shepherd C.W.
<Astrophys. J. Suppl. Ser. 129, 475 (2000)>
=2000ApJS..129..475Y
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ADC_Keywords: Surveys ; Galaxy catalogs ; Redshifts ; Photometry, UBVRI
Keywords: galaxies: redshifts - galaxies: photometry - galaxies: general -
surveys - techniques: photometric - techniques: spectroscopic
Description:
The Canadian Network for Observational Cosmology Field Galaxy
Redshift Survey (CNOC2) obtained spectroscopic redshifts for about
6200 galaxies to a nominal limit of R=21.5. The survey area of about
1.5 square degrees was spread over four patches on the sky.
This catalog presents photometry and redshifts for all galaxies
in the CNOC2 0223+00 Patch (area of 1409 square arcminutes). A future
paper will provide catalogs for the other three patches.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cnoc0223.dat 265 24101 CNOC2 Patch 0223+00
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See also:
J/ApJS/102/289 : CNOC cluster redshift survey catalogs. II. (Yee+, 1996)
J/ApJS/113/1 : CNOC cluster redshift survey catalogs. III. (Ellingson+ 1997)
J/ApJS/116/211 : CNOC cluster redshift survey catalogs. IV. (Yee+ 1998)
J/ApJS/116/231 : CNOC cluster redshift survey catalogs. V. (Abraham+ 1998)
J/ApJS/116/247 : CNOC cluster redshift survey catalogs. VI. (Ellingson+ 1998)
http://www.astro.utoronto.ca/~cnoc/ : the CNOC Homepage
http://www.astro.utoronto.ca/~cnoc/cnoc1.html : CNOC1 cluster galaxy survey
http://www.astro.utoronto.ca/~cnoc/cnoc2.html : CNOC2 field galaxy survey
Byte-by-byte Description of file: cnoc0223.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- PPP ID number in PPP (Picture-Processing Package)
catalog
8- 13 A6 --- CNOC2sp CNOC2 spectrum number (2)
15- 21 F7.1 arcsec oRA RA offset (West is positive), B1950
23- 29 F7.1 arcsec oDE DE offset (North is positive), B1950
31- 37 F7.5 --- z ?=9.99999 Redshift
39- 41 I3 10-5 e_z ?=999 Redshift error
43- 47 F5.2 --- Rval ?=99.99 Redshift reliability value
49- 50 I2 --- Sc Spectral class (3)
52- 57 F6.3 --- w_z Redshift weight (1)
59- 63 F5.2 mag Imag ?=99.99 Cousins I magnitude
65- 67 I3 0.01mag e_Imag ?=999 Cousins I magnitude error
69- 71 I3 0.01mag Ice Cousins I color aperture magnitude error (4)
73- 78 F6.3 --- w_Imag ?=99.99 Cousins I magnitude weight (1)
80- 84 F5.3 --- IWc Cousins I color weight (1)
86- 90 F5.3 --- IWxy Cousins I positional weight (1)
92- 96 F5.2 mag Rmag ?=99.99 Cousins R magnitude
98-100 I3 0.01mag e_Rmag ?=999 Cousins R magnitude error
102-104 I3 0.01mag Rce ?=999 Rmag color aperture magnitude error (4)
106-111 F6.3 --- w_Rmag ?=99.99 Cousins R magnitude weight (1)
113-117 F5.3 --- RWc Cousins R color weight (1)
119-123 F5.3 --- RWxy Cousins R positional weight (1)
125-129 F5.2 mag Vmag ?=99.99 Johnson V magnitude
131-133 I3 0.01mag e_Vmag ?=999 Johnson V magnitude error
135-137 I3 0.01mag Vce ?=999 Vmag color aperture magnitude error (4)
139-144 F6.3 --- w_Vmag ?=99.99 Vmag magnitude weight (1)
146-150 F5.3 --- VWc Johnson V color weight (1)
152-156 F5.3 --- VWxy Johnson V positional weight (1)
158-162 F5.2 mag Bmag ?=99.99 Johnson B magnitude
164-166 I3 0.01mag e_Bmag ?=999 Johnson B magnitude error
168-170 I3 0.01mag Bce ?=999 Bmag color aperture magnitude error (4)
172-177 F6.3 --- w_Bmag ?=99.99 Johnson B magnitude weight (1)
179-183 F5.3 --- BWc Johnson B color weight (1)
185-189 F5.3 --- BWxy Johnson B positional weight (1)
191-195 F5.2 mag Umag ?=99.99 Johnson U magnitude
197-199 I3 0.01mag e_Umag ?=999 Johnson U magnitude error
201-203 I3 0.01mag Uce ?=999 Umag color aperture magnitude error (4)
205-210 F6.3 --- w_Umag ?=99.99 Johnson U magnitude weight (1)
212-216 F5.3 --- UWc Johnson U color weight (1)
218-222 F5.3 --- UWxy Johnson U positional weight (1)
224 I1 --- Pcl [0,4] PPP morphological class (5)
225-230 F6.2 mag Rkcor R-band k-correction
232-237 F6.1 pix xpos Original CCD x coordinate
239-244 F6.1 pix ypos Original CCD y coordinate
246-247 I2 h RAh Right Ascension 1950 (hours)
249-250 I2 min RAm Right Ascension 1950 (minutes)
252-255 F4.1 s RAs [0/60] Right Ascension 1950 (seconds)
257 A1 --- DE- Declination 1950 (sign)
258-259 I2 deg DEd Declination 1950 (degrees)
261-262 I2 arcmin DEm Declination 1950 (minutes)
264-265 I2 arcsec DEs Declination 1950 (seconds)
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Note (1): An important feature of the catalog is the various weights
computed to allow the sample to be used as a complete sample. A
detailed description of the weights are given in the paper. The
primary weight is the magnitude weight Wm (prefixed w_ in the table).
The subsidiary weights modify the magnitude weight Wm as follows:
W(tot) = Wm * Wxy * Wc * Wz,
where Wxy=geometric weight, Wc=color weight, and Wz=redshift weight.
Note that each filter has its own Wm, Wxy and Wc. However, Wz, which
is model dependent, is determined only for the R filter.
Note (2): Spectrum name. The last 4 characters denote mask number,
(A,B,C) and spectrum number (e.g. A034), the first 2 numbers denote
field numbers (same as (1)). Note that for objects with multiple
observations only one of the spectrum IDs is listed (usually the one
with the highest redshift reliability (Rval) value).
Note (3): Spectroscopic classification:
0 = object not targeted for spectroscopy
2 = elliptical spectrum
4 = intermediate-type spectrum
5 = emission-line spectrum
6 = active galactic nuclei
77 = star
88 = unknown
99 = slit but no spectrum (object too faint)
Note (4): Color aperture magnitude error. This is the magnitude error
within the aperture used to determine the color of the object. An
approximate uncertainty in the color between any two filters can be
derived by adding the two color aperture errors in quadrature.
Note (5): PPP star-galaxy classification:
0 = cosmic ray/non detection
1 = galaxy
2 = probable galaxy
3 = star
4 = saturated star
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Nomenclature Notes:
The center of the co-ordinate system used in the catalog is at
02:23:29.95 +00:05:12.9 (1950). The astrometry is accurate to about
+/-1 arcseconds RMS. Objects should be named using the prefix CNOC2
followed by the standard IAU coordinate designation for coordinates
with this accuracy. For example, an object at the center of the
coordinate system would be known as CNOC2 022329.9+000512.
History:
* 01-Aug-2000: Version 1 of cnoc0223.dat
Copied at http://www.astro.utoronto.ca/~cnoc/catalogs.html
* 13-Feb-2001 : Version 2 of cnoc0223.dat (corrected some photometry)
Author's address: Howard Yee <hyee@astro.utoronto.ca>
Pat Hall <hall@astro.utoronto.ca>
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(End) Pat Hall [Univ. Toronto] James Marcout, Patricia Bauer [CDS] 13-Feb-2001