Data model: photoRC3

General description: Match of objects in a field of the SDSS imaging catalog to the Third Reference Catalog (but with object coordinates updated to those listed in the NASA Extragalactic Database as of Spring 2009). These matches are to any objects which are RUN_PRIMARY according to the local resolve (see resolve documentation).

Naming convention: photoRC3-RUN6-CAMCOL-FIELD4.fits

Approximate size: 20 kbytes.

File type: FITS

Read by products: sas

Written by products: photoop

Required header keywords:

• P_RESOLV (string): path for PHOTO_RESOLVE variable
• P_CALIB (string): path for PHOTO_CALIB variable

Required column names:

• run (int32): Run number
• camcol (int32): Camera column
• field (int32): Field number
• id (int32): The object id within a field. Usually changes between reruns of the same field
• rerun (string): Rerun number
• objID (int64): Unique SDSS identifier composed from [skyVersion,rerun,run,camcol,field,obj].
• run_resolve_status (int32): status flag for local resolve
• ra (float64): SDSS right ascension, J2000 (deg)
• dec (float64): SDSS declination, J2000 (deg)
• RC3_RA (float64): NED right ascension, J2000 (deg)
• RC3_DEc (float64): NED declination, J2000 (deg)
• RC3_NAME1 (string): designation #1 (Names or NGC and IC)
• RC3_NAME2 (string): designation #2 (UGC, ESO, MCG, UGCA, CGCG)
• RC3_NAME3 (string): designation #3 (other)
• RC3_PGC (string): Principal Galaxy Catalog number (Paturel et al. 1989)
• RC3_HUBBLE (string): revised Hubble type, coded as in RC2 (Section 3.3.a, page 13).
• RC3_LOGD_25 (float32): mean decimal logarithm of the apparent major isophotal diameter measured at or reduced to surface brightness level mu_B = 25.0 B-mag/arcsec^2, as explained in Section 3.4.a, page 21. Unit of D is 0.1 arcmin to avoid negative entries.
• RC3_LOGD_25Q (string): quality flag for isophotal diameter ("?" if bad)
• RC3_LOGD_25ERR (float32): error on mean decimal logarithm of the apparent major isophotal diameter
• RC3_PA (float32): position angle (east of north) (deg)
• RC3_BT (float32): total (asymptotic) magnitude in the B system (mag)
• RC3_BT_S (string): source code for BT
• RC3_BTQ (string): quality flag total magnitude ("?" if bad)
• RC3_BTERR (float32): error in total (asymptotic) magnitude in the B system (mag)
• RC3_BMVT (float32): total (asymptotic) color index in Johnson B-V (mag)
• RC3_BMVTQ (string): quality flag ("?" if bad)
• RC3_BMVTERR (float32): error in total (asymptotic) color index in Johnson B-V (mag)
• RC3_BMVE (float32): color index within effective aperture in Johnson B-V (mag)
• RC3_BMVEQ (string): quality flag ("?" if bad)
• RC3_BMVEERR (float32): error in color index within effective aperture in Johnson B-V (mag)
• RC3_M21 (float32): 21-cm emission line magnitude, defined by by m_21 = 21.6 - 2.5 log(S_H), where S_H is the measured neutral hydrogen flux density in units of 10^-24 W/m^2.
• RC3_M21Q (string): quality flag ("?" if bad)
• RC3_M21ERR (float32): error in 21-cm emission line magnitude
• RC3_V21 (float32): mean heliocentric radial velocity from HI observations (km)
• RC3_V21Q (string): quality flag ("?" if bad)
• RC3_V21ERR (float32): error in heliocentric radial velocity (km)
• RC3_HUBBLE_SRC (string): sources of revised type estimate
• RC3_N_L (int16): number of luminosity class estimates
• RC3_LOGR_25 (float32): mean decimal logarithm of the ratio of the major isophotal diameter, D_25, to the minor isophotal diameter, d_25, measured at or reduced to the surface brightness level mu_B = 25.0 B-mag/arcsec^2.
• RC3_LOGR_25Q (string): quality flag ("?" if bad)
• RC3_LOGR_25ERR (float32): error in decimal logarithm of the ratio of the major isophotal diameter to minor
• RC3_AGB (float32): Burstein-Heiles Galactic extinction in B (mag)
• RC3_MB (float32): photographic magnitude reduced to B_T system (mag)
• RC3_MBQ (string): quality flag ("?" if bad) (mag)
• RC3_MBERR (float32): error in photograph magnitude (mag)
• RC3_UMBT (float32): total (asymptotic) color index in Johnson U-B (mag)
• RC3_UMBTQ (string): quality flag ("?" if bad)
• RC3_UMBTERR (float32): error in total (asymptotic) color index in Johnson U-B (mag)
• RC3_UMBE (float32): color index within effective aperture in Johnson U-B (mag)
• RC3_UMBEQ (string): quality flag ("?" if bad),
• RC3_UMBEERR (float32): error in color index within effective aperture in Johnson U-B (mag)
• RC3_W20 (float32): neutral hydrogen line full width (in km/s) measured at the 20% level (I_20/I_max) (km)
• RC3_W20Q (string): quality flag ("?" if bad)
• RC3_W20ERR (float32): error in W20 (km)
• RC3_VOPT (float32): mean heliocentric radial velocity from optical observations (km)
• RC3_VOPTQ (string): quality flag ("?" if bad)
• RC3_VOPTERR (float32): error in mean heliocentric radial velocity from optical observations (km)
• RC3_SGL (float64): supergalactic longitude (deg)
• RC3_SGB (float64): supergalactic latitude (deg)
• RC3_TYPE (float32): T = mean numerical index of stage along the Hubble sequence in the RC2 system (coded as explained in Section 3.3.c, page 16)
• RC3_TYPEQ (string): quality flag ("?" if bad)
• RC3_TYPEERR (float32): error in T-type
• RC3_LOGA_E (float32): decimal logarithm of the apparent diameter (in 0.1 arcmin) of the ``effective aperture,'' the circle centered on the nucleus within which one-half of the total B-band flux is emitted
• RC3_LOGA_EQ (string): quality flag ("?" if bad)
• RC3_LOGA_EERR (float32): error in decimal logarithm of the apparent diameter (in 0.1 arcmin) of the ``effective aperture,''
• RC3_AIB (float32): internal extinction (for correction to face-on), calcauled from size and T-type (mag)
• RC3_MFIR (float32): far-infrared magnitude calculated from m_FIR = - 20.0 - 2.5 logFIR, where FIR is the far infrared continuum flux measured at 60 and 100 microns as listed in the IRAS Point Source Catalog (1987).
• RC3_BMVT0 (float32): total B-V color index corrected for Galactic and internal extinction, and for redshift (mag)
• RC3_MPE (float32): mean B-band surface brightness in magnitudes per square arcmin (B-mag/arcmin^2) within the effective aperture A_e, and its mean error, as given by the relation MPE = B_T + 0.75 + 5logA_e - 5.26. (mag)
• RC3_MPEQ (string): quality flag ("?" if bad)
• RC3_MPEERR (float32): error in mean B-band surface brightness (mag)
• RC3_W50 (float32): neutral hydrogen line full width (in km/s) measured at the 50% level (I_20/I_max) (km)
• RC3_W50Q (string): quality flag ("?" if bad)
• RC3_W50ERR (float32): error in neutral hydrogen line full width (in km/s) measured at the 50% level (I_20/I_max) (km)
• RC3_VGSR (float32): the weighted mean of the neutral hydrogen and optical velocities, corrected to the ``Galactic standard of rest'' (km)
• RC3_L (float32):
• RC3_LQ (string): quality flag ("?" if bad)
• RC3_LERR (float32): mean numerical luminosity class in the RC2 system
• RC3_LOGD0 (float32): decimal logarithm of the isophotal major diameter corrected to ``face-on'' (inclination = 0 degrees), and corrected for Galactic extinction to A_g = 0, but not for redshift
• RC3_SA21 (float32): HI line self-absorption in magnitudes (for correction to face-on), calculated from logR and T >= 1 (mag)
• RC3_BT0 (float32): B_T^0 = total ``face-on'' magnitude corrected for Galactic and internal extinction, and for redshift (mag)
• RC3_UMBT0 (float32): (U-B)_T^0 = total U-B color index corrected for Galactic and internal extinction, and for redshift (mag)
• RC3_MP25 (float32): the mean surface brightness in magnitudes per square arcmin (B-mag/arcmin^2) within the mu_B = 25.0 B-mag/arcsec^2 elliptical isophote of major axis D_25 and axis ratio R_25 (mag)
• RC3_MP25Q (string): quality flag ("?" if bad)
• RC3_MP25ERR (float32): error inthe mean surface brightness within the mu_B = 25.0 B-mag/arcsec^2 (mag)
• RC3_HI (float32): corrected neutral hydrogen index, which is the difference m_21^0 - B_T^0 between the corrected (face-on) 21-cm emission line magnitude and the similarly corrected magnitude in the B_T system.
• RC3_V3K (float32): the weighted mean velocity corrected to the reference frame defined by the 3 K microwave background radiation (km)