| Field | Type | Description
|
|---|
| sybid | int * |
|
| RAH | int * | RA 2000 (hour) precessed from 1950 coords (cols 57-59)
|
| RAM | int | RA 2000 (min)
|
| RAS | real | RA 2000 (sec)
|
| DecD | int * | Dec 2000 (deg) precessed from 1950 coords (cols 60-62)
|
| DecM | int | Dec 2000 (min)
|
| DecS | char | Dec 2000 (sec)
|
| Name | char * | Name: LMC, SMC, NGC or IC designations
|
| Type | char | Type: mean revised morphological type in RC2 system
|
| LogD25 | real | Log D25 (0.1min) mean decimal log of the apparent major isophotal diameter expressed as surface brightness muB = 25.0B/sq m.
|
| ME_LogD25 | real | Mean error in log D25 (0.1min)
|
| PosAngle | int | Position angle of the major axis (deg) measured in degrees from N through E (always < 180), mostly taken from UGC, ESO, ESGC
|
| BTot | real | BT (mag) total asymptotic B magnitude derived by extrapolation from photoelectric aperture magnitude data (BAT) and from surface photometry BST
|
| BTcode | char | BT code: M means weighted mean of BAT and BST, S is surface only, V is V-band rather than B-band, v means the nucleus is variable. * indicates that an extrapolation > .75mag would have been required.
|
| ME_BT | real | Mean error in BT (mag)
|
| B_VTot | real | (B - V)T (mag) total (asymptotic) color index in the Johnson B-V system
|
| ME_BVT | real | Mean error in (B - V)T (mag)
|
| B_Ve | real | (B - V)e (mag) mean B - V within the effective aperture Ae
|
| ME_BVe | real | Mean error in (B - V)e (mag)
|
| m21 | real | m21 (10-24/sq-m) 21cm emission line magnitude as m21 = 21.6 - 2.5 log SH where SH is the measured neutral hydrogen flux density in units of 10-24W/sq m
|
| ME_m21 | real | Mean error in m21 (10-24/sq-m)
|
| V21 | int | V21 (km/sec) mean heliocentric radial velocity as derived from neutral hydrogen observations
|
| ME_V21 | int | Mean error in V21 (km/sec)
|
| GalLong | float | Galactic longitude (deg) to .01 per IAU 1958 with NGP at alpha 12h49m delta +27 24 (1950) and origin at alpha 17h 42.4m delta -28 55 (1950)
|
| GalLat | real | Galactic latitude (deg) to .01, see longitude
|
| AltName | char | Alternate name: UGC, ESO, MCG, UGCA and CGCG designations (in that order of preference)
|
| RtypSrc | char | Source of revised type estimates: V = de Vaucouleurs, 4 = a ring galaxy classified by Buta (4m plates)
|
| LumEst | int | Number of luminosity class estimates
|
| LogR25 | real | log R25: mean decimal log of the ration of the major isphotal diameter D25 to the minor isophotal diameter d25 expressed as surface brightness (see col 10)
|
| ME_LogR25 | real | Mean error in log R25
|
| Ag | real | Ag (mag) galactic extinction in B band, calculated following Burstein and Heiles (1978a,b, 1982, 1984)
|
| mB | real | mB (mag) photographic magnitude from Ames (1930), Shapley and Ames (1932), CGCG, Buta and Corwin (1986), and/or Lauberts and Valentijn (1989)
|
| ME_mB | real | Mean error in mB (mag)
|
| U_BTot | real | (U - B)T (mag) total (asymptotic) color index in the Johnson U-B system
|
| ME_UBT | real | Mean error in (U - B)T (mag)
|
| U_Be | real | (U - B)e (mag) mean U - B within the effective aperture Ae
|
| ME_UBe | real | Mean error in (U - B)e (mag)
|
| W20 | int | W20 (km/sec) neutral hydrogen line full width measured at the 20 % level (I20/Imax)
|
| ME_W20 | int | Mean error in W20 (km/sec)
|
| Vopt | int | Vopt = cz (km/sec) mean heliocentric radial velocity as derived from optical observations
|
| ME_Vopt | int | Mean error in Vopt (km/sec)
|
| SGlong | float | Supergalactic longitude (deg)
|
| SGlat | real | Supergalactic latitude (deg)
|
| Desig | char | Other designation: any common designation other than fields 8 and 26
|
| T_Hubble | real | T: numerical index of stage along Hubble sequence in RC2 system
|
| ME_T | real | Mean error of T
|
| LogAe | real | Log Ae (0.1min) mean decimal log of the apparent diameter of the effective aperture (the circle centered on the nucleus within which 1/2 of the total B-band flux is emitted)
|
| ME_LogAe | real | Mean error in log Ae (0.1min)
|
| Ai | real | Ai (mag) internal B band extinction calculated from log R and T
|
| mFIR | real | mFIR (mag) far infrared magnitude: -20.0 - 2.5 logFIR where FIR is the far infrared continuum flux measured at 60 and 100 microns as listed in the IRAS PSC (1987)
|
| B_VoT | real | (B - V)oT (mag) total B-V color index corrected for galactic and internal extinction and for redshift
|
| m_e | real | m-arcmin-e (mag/sq-min) mean B-band sufrace brightness in magnitudes per square arcmin within the effective aperture Ae
|
| ME_me | real | Mean error in m-arcmin-e (mag/sq-min)
|
| W50 | int | W50 (km/sec) neutral hydrogen line full width measured at the 50 % level (I50/Imax)
|
| ME_W50 | int | Mean error in W50 (km/sec)
|
| VGSR | int | VGSR (km/sec) the weighted mean of the natural hydrogen and optical velocities corrected to the galactic standard of rest
|
| RAH1950 | int | RA1950 (hour)
|
| RAM1950 | int | RA1950 (min)
|
| RAS1950 | char | RA1950 (min-or-sec)
|
| DecD1950 | int | Dec1950 (deg)
|
| DecM1950 | int | Dec1950 (min)
|
| DecS1950 | char | Dec1950 (sec)
|
| PGCnum | char | PGC number: designation by Paturel et al (1989a,b)
|
| LumCls | real | Luminosity class: mean numerical luminosity class in RC2 system
|
| ME_LumCls | real | Mean error of luminosity class
|
| LogDo | real | Log Do (mag/sq-sec) decimal log of the isophotal major diameter corrected to face-on (i=0) and corrected for galactic extinction to Ag=0, but not corrected for redshift
|
| A21_HIsa | real | A21 (mag) H I line self absorption calculated from log R and T >= 1
|
| BoT | real | BoT (mag) total face-on magnitude corrected for galactic and internal extinction and for redshift
|
| U_Bot | real | (U - B)oT (mag) total U-B color index corrected for galactic and internal extinction and for redshift
|
| m_25 | real | m-arcmin-25 (mag/sq-min) mean surface brightness in magnitudes per square arcmin within the muB=25.0 B-m/ss elliptical isophote of major axis log D25 and axis ration log R25 as in RC2
|
| ME_m25 | real | Mean error in mi-arcmin-25 (mag/sq-min)
|
| HI | real | HI (mag) corrected neutral hydrogen index: the difference mo21-BoT between the corrected face-on 21cm emission line mag and the BT corrected mag
|
| V3K | int | V3K (km/sec) the weighted mean velocity corrected to the reference frame defined by the 3K microwave background
|