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VII/112 RC2 Catalogue (de Vaucouleurs+ 1976)
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The Second Reference Catalogue of bright galaxies (RC2)
de Vaucouleurs G., de Vaucouleurs A., Corwin Jr. H.G.
<University of Texas Press, Austin (1976)>
=1976rcbg.book.....D
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ADC_Keywords: Galaxy catalogs
Description:
This standardized documentation file does not contain a complete
description of the electronic version of the RC2 catalogue;
please refer to the "doc.tex" file prepared by Theresa A. Nagy and
Robert S. Hill.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 298 4364 The RC2 catalogue
doc.tex 81 1301 Complete LaTeX documentation (needs adc.sty)
adc.sty 78 68 Style file to process doc.tex
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See also:
VII/155 : "Third Reference Catalogue of bright galaxies" (RC3)
by de Vaucouleurs G., de Vaucouleurs A., Corwin Jr. H.G.,
Buta R.J., Paturel G. and Fouque P. (1991),
with 23022 galaxies
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name RC2 identification (NGC, IC, or anonymous)
9 A1 --- m_Name Component identification (A, B, C, etc.) (1)
10- 11 I2 h RAh Hours RA, 1950.0
12- 16 F5.2 min RAm Minutes RA, 1950.0
17 A1 --- DE- Sign Dec, 1950.0
18- 19 I2 deg DEd Degrees Dec, 1950.0
20- 23 F4.1 arcmin DEm Minutes Dec, 1950.0
24- 29 F6.2 deg GLON Galactic longitude
30- 34 F5.1 deg SGLON Supergalactic longitude
35- 41 A7 --- MType Revised morphological Type (Table 2)(9)
42- 43 A2 --- Hubble Numerical Hubble Sequence Index T (Table 3)(9)
44 A1 --- n_Hubble [*RP$] Remark on Hubble Sequence Index (8)
45- 48 A4 --- Plate Source of plate (Table 4)(9)
49 A1 --- r_MType Morphological type author code (Table 5)(9)
50- 56 A7 --- Yerkes_1 Yerkes list 1 type and color classes (6)
57 I1 --- Byurkan [1/5]? Nuclear type in Byurkan system (2)
58 A1 --- n_Byurkan [*$S2-5] Note on Byurkan nucleus type (2)
59- 62 F4.2 0.1arcmin logD25 ? Major isophotal diameter, log(D_25)
63- 66 F4.2 --- logR25 ? Ratio major to minor diameter, log(R_25)
67- 70 F4.2 0.1arcmin logD(0)25 ? Face-on major isophotal diameter
71- 74 F4.2 0.1arcmin logAe ? Effective aperture diameter, log(Ae)
75 A1 --- u_logAe [*$] '*'=uncertain, '$'=doubtful
77- 81 A5 --- ID Object identifications (9)
82- 88 F7.2 0.01min/yr precRAm Centennial precession in RA, minutes
89- 93 F5.1 0.01arcmin/yr precDEm Centennial precession in DE, arcminutes
94- 99 F6.2 deg GLAT Galactic latitude
100-104 F5.1 deg SGLAT Supergalactic latitude
105-112 A8 --- DDOType David Dunlap Obs. (van den Bergh) type (7)
113 I1 --- DDOClass ? David Dunlap Obs. luminosity class (7)
114 A1 --- u_DDOClass [*$] '*'=uncertain, '$'=doubtful
115-117 F3.1 --- Weight ]0/5]? Plate material weight (9)
118-124 A7 --- Yerkes_2 Yerkes list 2 type and nuclear class (6)
125-128 A4 --- RC1 RC1 nuclear class (9)
129-132 F4.3 0.1arcmin e_logD25 ? Mean error of logD25
133-136 F4.3 --- e_logR25 ? Mean error of logR25
137-140 F4.2 0.1arcmin D0 ? Corrected log(D(0)25) for galactic extinc.
141-143 F3.2 0.1arcmin e_logAe ? Mean error of log(Ae)
145-148 F4.1 mag Hmag ? Harvard photographic magnitude, mH
149 A1 --- u_Hmag [*] if Hmag uncertain
150-154 F5.2 mag BT ? Total asymptotic B magnitude (BT)
155 A1 --- n_BT [*S] Flag on BT, see note (3)
156-159 F4.1 mag/arcsec2 SuBr ? Mean B surface brightness within Ae (9)
160-163 F4.2 mag Extinct ? Galactic extinction in B system (A_B) (9)
164-167 F4.2 mag (B-V)T ? Asymptotic color index (9)
168 A1 --- n_(B-V)T [*] Flag on (B-V)T, see comment (3)
169-172 F4.2 mag (U-B)T ? Asymptotic color index (9)
173 A1 --- n_(U-B)T [*] Flag on (U-B)T, see comment (3)
174-177 F4.2 mag (B-V)Ae ? Effective aperture color index (9)
178 A1 --- n_(B-V)Ae [*] Flag on (B-V)Ae, see comment (3)
179-182 F4.2 mag (U-B)Ae ? Effective aperture color index (9)
183 A1 --- n_(U-B)Ae [*] Flag on (U-B)Ae, see comment (3)
184-187 F4.2 mag B-V ? Total B-V color index, corrected (9)
188-191 F4.2 10mJy logS_R ? Radio continuum flux near 1.4GHz (21cm)
192 A1 --- n_logS_R [$+*] Conditional code for logS_R (4)
193-196 F4.2 --- SpIndex1 ? Spectral index, {alpha}- for {nu} < {nu}_R
197 A1 --- u_SpIndex1 [$*] '*'=uncertain, '$'=very uncertain
198-201 F4.2 10-22W/m2 logS_H ? Integrated HI flux density
202 A1 --- n_logS_H [$+*] Conditional code for logS_H (4)
203-207 F5.2 mag RIndex ? Corrected radio index (RI) (9)
208 A1 --- u_RIndex [$] '$' for doubtful RIndex value
209-213 I5 km/s RadVel ? Observed Radial velocity (cz)
214 A1 --- u_RadVel [*] '*' if discrepant RadVel values
215-219 I5 km/s RadVel0 ? Radial velocity corrected for solar motion
220-222 A3 --- Appendix [PST ] Appendices codes, see comment (5)
225-234 A10 --- Zwicky Zwicky identifications
235-239 F5.2 mag HmagCorr ? Corrected Harvard photographic magnitude (9)
240-242 F3.2 mag e_BT ? Estimated mean error of BT (9)
243-246 F4.1 mag/arcsec2 SuBrAv ? Average surface brightness (9)
247-251 F5.2 mag BT0 ? Corrected face-on magnitude (9)
252-254 F3.2 mag e_(B-V)T ? Mean error of asymptotic color (9)
255-257 F3.2 mag e_(U-B)T ? Mean error of asymptotic color (9)
258-260 F3.2 mag e_(B-V)Ae ? Mean error of effective color (9)
261-263 F3.2 mag e_(U-B)Ae ? Mean error of effective color (9)
264-267 F4.2 --- (U-B)T0 ? Total corrected U-B color index (9)
268-269 I2 --- o_SpIndex1 ? Number of radio continuum measurements
270-271 I2 --- o_logS_R ? Number of radio measurements for logS_R
272-273 I2 --- o_SpIndex2 ? Number of radio continuum measurements
274-277 F4.2 --- SpIndex2 ? Spectral index, {alpha}+ for {nu} > {nu}_R
278 A1 --- u_SpIndex2 [$*] '*'=uncertain, '$'=very uncertain
279 I1 --- o_logS_H ? Number of 21cm emission line observations
280-282 F3.2 0.4mag A21 ? Self-absorption at 21 cm (1.4GHz)
283-287 F5.2 mag HI ? Neutral hydrogen index (9)
288 A1 --- u_HI [$] '$' if HI is doubtful
289 I1 --- o_RadVelR ? Number of radio observations for RadVel
290-291 I2 --- o_RadVelO ? Number of optical observations for RadVel
292-294 I3 km/s e_RadVel ? Radial velocity mean error
295-298 I4 km/s DVelSun Solar motion correction, delta V
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Note (1): A '.' indicates double or multiple objects where the data refers
to the combined objects, but the classification is the brightest
component.
Note (2):
See details in doc.tex; nuclear type has the values
1 = no central condensation
2 = weak central condensation
3 = strong central condensation but no star-like image
4 = star-like nuclear image at short exposure but nebulous at
long exposure
5 = star-like nuclear image even at long exposures.
The additional n_Byurkan flag may also contain a second Byurkan
type when two independent classifications are given.
Otherwise, this flag contains the symbols:
S = small nucleus
* = uncertain
$ = doubtful
Note (3): The flag on BT or asymptotic colors has the following meaning:
'*' if no total magnitude could be derived with single aperture
observations requiring corrections in excess of 0.5 mag.
'S' if magnitude or color is a weighted mean.
Note (4): the flag on logS has the approximate meaning
(see doc.tex for details):
'$' indicates discrepancies
'*' indicates uncertainty
'+' if a close pair was in the beam
Note (5): indicates objects that have entries in the special appendices
of the published catalogue:
'P': source of photographs in 18 atlases and major surveys;
'S': galaxies with supernovae;
'T': Hubble-Sandage and Hubble-Holmberg types.
Note (6): see details about Yerkes color and class on doc.tex, Table 6
Note (7): see details about van den Bergh type and classes in doc.tex,
Table 7.
Note (8): The flag concerning the numerical Hubble type is
'P'=peculiar
'R'=note
'$'=doubtful
'*'=uncertain
Note (9): See documentation file doc.tex
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Historical Notes:
* See section 3 in "doc.tex"
* available on the NASA "Selected Astronomical Catalogs" Vol. 1 CD-ROM,
directory /nonstell/galaxies/rc2
* 13-Sep-1995 (CDS): compared to the CD-ROM version:
- the decimal point was inserted when declination is given to
the arcmin accuracy in file "catalog"
- the document file "doc.tex" was corrected according to Harold
Corwin's comments (except for units of radio fluxes)
- the standardized "ReadMe" file was created
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(End) Francois Ochsenbein [CDS] 13-Sep-1995