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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 72 19367 UZC catalog (table 1) refs.dat 123 325 Velocity sources for the UZC (table 2)
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
Bytes Format Units Label Explanations
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
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.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Ref Reference number 6- 24 A19 --- BibCode BibCode 27- 54 A28 --- Aut Author names 56-123 A68 --- Rem Remarks
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
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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