| Show | Sort | Column | Constraint | Explain   (UCD) | 
|  |  | recno |  | Record number assigned by the VizieR team. Should Not be used for identification. (meta.record) (RECORD) | 
|  |  | CGCG | (char) | Identification in the Catalog of Galaxies and Clusters of Galaxies (Zwicky et al. 1961-68 (CGCG)), that is the field number and then the entry number within that field (meta.id) (ID_IDENTIFIER) | 
|  |  | UGC |  | (n) [1/12921] Uppsala General Catalog (UGC) entry number (Nilson 1973) (meta.id) (ID_ALTERNATIVE) | 
|  |  | m_UGC | (char) | UGC component designation (meta.code.multip) (CODE_MULT_INDEX) | 
|  |  | n_NGC/IC | (char) | New General Catalogue (NGC) or Index Catalog (IC) indicator, 'N' or 'I', respectively (meta.note) (NOTE) | 
|  |  | NGC/IC |  | (n) NGC/IC number (meta.id;meta.main) (ID_NUMBER) | 
|  |  | RA1950 | "h:m:s" | (i) Right ascension 1950  (Note 1)
  (pos.eq.ra;meta.main) (POS_EQ_RA_MAIN) | 
|  |  | DE1950 | "d:m:s" | (i) Declination 1950 (pos.eq.dec;meta.main) (POS_EQ_DEC_MAIN) | 
|  |  | T | (char) | Morphological type code index  (Note 2)
  (meta.code;src.morph.type) (MORPH_TYPE) | 
|  |  | a | arcmin | (n) Major diameter from the UGC where available or else measured by eye from the PSS prints (phys.angSize) (EXTENSION_DIAM) | 
|  |  | b | arcmin | (n) Minor diameter (phys.angSize) (EXTENSION_MIN) | 
| ALL cols
 |  |  |  | 
|  |  | i | deg | (n) [0/180[ Inclination derived from the axial ratio following Haynes & Giovanelli (HG84). (src.orbital.inclination) (POS_INCLIN_LOS) | 
|  |  | m(z) | mag | (n) Magnitude given in the CGCG or the UGC. (phot.mag;em.opt) (PHOT_PHG_MAG) | 
|  |  | m(c) | mag | (n) Corrected magnitude, after applying the corrections for galactic and internal extinction, redshift and systematic effects as discussed by HG84. (phot.mag;em.opt.B) (PHOT_MAG_B) | 
|  |  | RV | km/s | 21 cm line heliocentric velocity  (Note 6)
  (spect.dopplerVeloc;em.radio.750-1500MHz;spect.line) (VELOC_HC) | 
|  |  | V(0) | km/s | Adopted Local Group velocity  (Note 7)
  (phys.veloc;pos.lg) (VELOC_LG) | 
|  |  | W1 | km/s | (n) Observed 21 cm profile width, measured at a level of 50% of the mean signal intensity. (spect.line.width) (SPECT_LINE_WIDTH) | 
|  |  | W2 | km/s | (n) Observed 21 cm profile width, measured at a level of 20% of the peak signal intensity. (spect.line.width) (SPECT_LINE_WIDTH) | 
|  |  | Wc | km/s | (n) 21 cm profile width corrected for viewing inclination and to the rest frame of the observer (spect.line.width) (SPECT_LINE_WIDTH) | 
|  |  | Fobs | Jy.km/s | (n) Observed 21 cm line flux (phot.flux.density;em.radio.750-1500MHz;spect.line) (SPECT_FLUX_VALUE) | 
|  |  | Fc | Jy.km/s | (n) 21 cm line flux, after correction for pointing, beam dilution, and internal absorption following HG84. (phot.flux.density;em.radio.750-1500MHz;spect.line) (SPECT_FLUX_VALUE) | 
|  |  | NWc | mJy | (n) rms noise in baseline 21 cm line profile, where available. (stat.stdev;instr.det.noise) (INST_NOISE) | 
|  |  | snr |  | (n) Signal-to-noise ratio of HI emission spectrum, measured as the ratio of peak signal flux to e_Wc, where available. (stat.snr;phys.emissMeasure) (INST_S/N) | 
|  |  | log(L) | [solLum] | (n) Logarithm of optical luminosity, log10(h^2 L), with h = H0/100 km/s/Mpc. (phys.luminosity) (PHYS_LUMINOSITY_GENERAL) | 
|  |  | log(M_H_) | [solMass] | (n) Logarithm of HI mass , log10(h^2 M(H)). (phys.mass) (PHYS_MASS_MISC) | 
|  |  | Tel | (char) | [012B] Telescope identification code for HI observations  (Note 3)
  (meta.id;instr.tel) (TEL_ID) | 
|  |  | Q |  | [0/5] Quality code for HI detection  (Note 4)
  (meta.code.qual;instr.saturation) (CODE_QUALITY) | 
|  |  | Ref |  | [1/6] Reference code for HI data  (Note 5)
  (meta.note) (REFER_CODE) | 
|  |  | Note | (char) | Note flag (see file notes2.dat) (meta.note) (NOTE) | 
|  |  | _RA.icrs | "h:m:s" | (n)(i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra) (POS_EQ_RA_OTHER) | 
|  |  | _DE.icrs | "d:m:s" | (n)(i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec) (POS_EQ_DEC_OTHER) | 
| ALL cols
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