J/PASP/111/438 Updated Zwicky catalog (UZC) (Falco+, 1999)
The updated Zwicky catalog (UZC).
Falco E.E., Kurtz M.J., Geller M.J., Huchra J.P., Peters J., Berlind P.,
Mink D.J., Tokarz S.P., Elwell B.
<Publ. Astron. Soc. Pac. 111, 438 (1999)>
=1999PASP..111..438F 1999PASP..111..438F
ADC_Keywords: Galaxy catalogs ; Redshifts ; Surveys
Abstract:
The Zwicky Catalog of galaxies (ZC), with mZw≤15.5, has been the
basis for the Center for Astrophysics (CfA) redshift surveys. To date,
analyses of the ZC and redshift surveys based on it have relied on
heterogeneous sets of galaxy coordinates and redshifts. Here we
correct some of the inadequacies of previous catalogs by providing (1)
coordinates with ~<2" errors for all of the 19,369 catalog galaxies,
(2) homogeneously estimated redshifts for the majority (98%) of the
data taken at the CfA (14,632 spectra), and (3) an estimate of the
remaining "blunder" rate for both the CfA redshifts and for those
compiled from the literature. For the reanalyzed CfA data we include a
calibrated, uniformly determined error and an indication of the
presence of emission lines in each spectrum. We provide redshifts for
7257 galaxies in the CfA2 redshift survey not previously published;
for another 5625 CfA redshifts we list the remeasured or uniformly
rereduced value. Among our new measurements, 1807 are members of UZC
"multiplets" associated with the original Zwicky catalog position in
the coordinate range where the catalog is 98% complete.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 72 19367 UZC catalog (table 1)
refs.dat 123 325 Velocity sources for the UZC (table 2)
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See also:
VII/190 : Zwicky Galaxy Catalog (Zwicky+ 1968)
VII/193 : The CfA Redshift Catalogue, Version June 1995 (Huchra+ 1995)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
3- 4 I2 min RAm Right ascension (J2000)
5- 8 F4.1 s RAs Right ascension (J2000)
9 A1 --- DE- Declination sign (J2000)
10- 11 I2 deg DEd Declination (J2000)
12- 13 I2 arcmin DEm Declination (J2000)
14- 15 I2 arcsec DEs Declination (J2000)
17- 20 F4.1 mag Bmag B magnitude (Zwicky magnitude)
22- 26 I5 km/s cz ? Heliocentric redshift
28- 30 I3 km/s e_cz ? rms uncertainty on cz
32 A1 --- T [ABE] Spectral characteristics (1)
34 I1 --- U [0/4] UZC class 0-4 (2)
36 I1 --- N Number of UZC neighboring galaxies, within 3'
38- 49 A12 --- Zname Zwicky label based on 1950 positions
51 A1 --- f_cz [FMTXZ] Origin of the redshift measurement (3)
53- 56 I4 --- r_cz ? Reference code detailed in file refs.dat
(blank for CfA unpublished data)
58- 68 A11 --- Name Other name
70 A1 --- UZC [*] UZC multiplicity, * if multiple
72 A1 --- mul [PTG] NED multiplicity: Pair, Triple, Group
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Note (1): the symbol means:
A: absorption
E: emission
B: both emission and absorption
Note (2): the UZC class is defined as:
0: a "hit", where the GSC and Zwicky objects are separated in position
by less than 180", are comparable in brightness as determined
visually, and there is no other object within the field that could
be a Zwicky galaxy.
1: a "hit" with positional difference less than 180", again with a GSC
brightness in the vicinity of the Zwicky value. However, the field is
centered on a GSC "star" rather than on a "nonstar", but there is only
one possible Zwicky galaxy nearby, within the field. Thus, index 1
merely indicated that the nearest GSC object to the Zwicky coordinates
is a star rather than the appropriate galaxy.
2: a near "hit" with positional difference less than 180". However,
there is confusion because there are at least two galaxies with an
estimated spread in magnitudes |Δm| within the expected range,
either of which could be a Zwicky galaxy.
3: A near "hit" with positional difference less than 180", but with
|Δm| outside the expected range, raising suspicions about the
match of the GSC object to the Zwicky galaxy.
4: No "hit" at all for a positional difference less than 180", i.e.,
there is no match for a Zwicky galaxy.
Note (3): Code for the origin of the redshift measurement taken at the CfA:
Z for Z-machine,
M for the MMT (4.5m Multiple Mirror Telescope)
F for FAST spectra taken from our own and from other projects
X flags a low-S/N spectrum for Z-machine (FAST) measurements and
indicates a low S/N match with a spectrum at cz<100km/s.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Ref Reference number
6- 24 A19 --- BibCode BibCode
27- 54 A28 --- Aut Author names
56-123 A68 --- Rem Remarks
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History: Copied at http://cfa-www.harvard.edu/~falco/UZC
* 30-Jul-2002: slightly modified version copied from
http://cfa-www.harvard.edu/~falco/UZC (5 duplicates removed)
and added the references from Huchra's Zcat (VII/193)
(End) Francois Ochsenbein, James Marcout, Patricia Bauer [CDS] 27-May-1999