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J/A+AS/127/367 Virgo Photometry Catalogue (VPC) (Young+ 1998)
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The "Virgo photometry catalogue"; a catalogue of 1180 galaxies in the
direction of the Virgo Cluster's core
Young C.K., Currie M.J.
<Astron. Astrophys. Suppl. Ser. 127, 367 (1998)>
=1998A&AS..127..367Y (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxy catalogs ; Clusters, galaxy ; Photometry, surface ;
Radial velocities
Keywords: galaxies: clusters: individual: Virgo cluster - catalogues -
galaxies: fundamental parameters - galaxies:photometry
Description:
The Virgo Photometry Catalogue (VPC) contains independently calibrated
surface photometry in the U, B_J_ and R_C_ bands for over 1000
galaxies (including background objects) brighter than B_J25_=19.0 in a
23{deg}^2^ area of the sky centred on R.A., Dec.(1950)= 12h26m,
+13{deg}08'. The angular resolution of the photometry varies from band
to band and was in each case determined from the FWHM of stellar
profiles: 4.75+/-0.1arcsec in the U band, 5.0+/-0.1arcsec in the B_J_
band and 6.0+/-0.1arcsec in the R_C_ band. The photometry was intended
for the derivation of accurate magnitudes and colours and is therefore
not of high resolution. Stellar contamination of the galaxy sample is
minimal, and cannot exceed about 3 faint-end objects in total (i.e. it
is less than about 0.25%).
Parameters listed for catalogued galaxies include: equatorial
coordinates; morphological types; surface-brightness profile
parameters (which preserve the majority of the surface photometry
information); U, B_J_ and R_C_ isophotal magnitudes; U, B_J_, R_C_ and
[transformed] B total magnitudes; (U-B_J_) and (B_J_-R_C_) equal-area
colours, apparent angular radii, ellipticities, position angles,
heliocentric radial velocities and alternative designations. All total
magnitudes and total colours are extrapolated according to the "t"
system of Young et al. (1998A&AS..130..173Y).
The VPC is based primarily on four UK-Schmidt plates, all of which
were scanned using the COSMOS measuring machine at the Royal
Observatory Edinburgh. All magnitudes, colours and surface-brightness
parameters are derived from numerical integrations of segmented
plate-scan data; except for (in 109 cases) saturated and (in 51 cases)
inextricably merged images. The latter 51 images are listed in Table
14 (Appendix D) of the original paper, whilst data for the remaining
1129 objects [i.e. including ones for which the VPC photometry is
saturated in one or more bands] are listed in the main catalogue.
Errata to printed version of paper:
BAO has recently relocated, hence the new postcode.
Beijing Astronomical Observatory
Chinese Academy of Sciences
Beijing 100012
China
On p.377, for "r=10(\frac{1}{n})r_0_" read: "r=10^{\frac{1}{n}}^r_0_"
On p.390, for "Young C.K., Galaxies. In: Chan K.C., Cheng K.S. (eds.)".
read: "Young C.K., 1997, Galaxies. In Cheng K.S., Chan K.L. (eds.)".
On p.390, for "Young C.K., Metcalfe N., Zhu J., Wu H., Chen J., A&A"
read "Young C.K., Metcalfe N., Zhu J., Wu H., Chen J., A&AS (in press),
now A&AS 130, 173".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 344 1129 *Main catalogue (AppenC)
bj4882.dat 34 4384 Plate J4882 B_J_-band surface photometry (AppenB)
bj9229.dat 34 8857 Plate J9229 B_J_-band surface photometry (AppenB)
br2936.dat 34 10413 Plate R2936 R_C_-band surface photometry (AppenB)
bu9362.dat 34 8575 Plate U9362 U-band surface photometry (AppenB)
sumcat.dat 105 1129 Summary catalogue (AppenE)
sumcat1.tex 270 756 LaTeX version of Part1 of sumcat.dat
sumcat2.tex 270 755 LaTeX version of Part2 of sumcat.dat
sumcat3.tex 270 755 LaTeX version of Part3 of sumcat.dat
sumcat4.tex 270 421 LaTeX version of Part4 of sumcat.dat
sumcat1.ps 72 1260 PostScript version of Part1 of sumcat.dat
sumcat2.ps 72 1246 PostScript version of Part2 of sumcat.dat
sumcat3.ps 72 1247 PostScript version of Part3 of sumcat.dat
sumcat4.ps 72 762 PostScript version of Part4 of sumcat.dat
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Note on catalog.dat: mu(B_J_) denotes surface B_J_ brightness in mag/arcsec^2^.
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See also:
VII/48 : Catalogue of middle UV photometry of Virgo cluster galaxies
J/A+AS/106/199 : B-band photometry in Fornax and Virgo (Caon+ 1994)
J/A+AS/118/441 : Virgo + Fornax clusters galaxies UBVRI data (Schroeder+ 1996)
J/A+AS/121/507 : Near-IR surface photometry of Virgo galaxies (Boselli+ 1997)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- VPC Designation of galaxy in the VPC
6 I1 --- J9229i Photometry from Plate J9229 in VPC? (1)
7 I1 --- J4882i Photometry from Plate J4882 in VPC? (1)
8 I1 --- U9362i Photometry from Plate U9362 in VPC? (1)
9 I1 --- R2936i Photometry from Plate R2936 in VPC? (1)
11 A1 --- NGC/ICi Listed in NGC or IC (Cat. <VII/118>) ? (2)
12- 15 I4 --- NGC/IC ? NGC or IC designation number
16 A1 --- m_NGC/IC [AB] Multiplicity index on NGC/IC
18 A1 --- VCCi Listed in VCC (Binggeli et al.,
1985AJ.....90.1681B)? (4)
19- 22 I4 --- VCC ? VCC designation number
23 A1 --- n_VCC [bmp] VCC membership assignment (5)
25- 26 I2 h RAh Right ascension (1950.0)
27 A1 --- --- [:]
28- 29 I2 min RAm Right ascension (1950.0)
30 A1 --- --- [:]
31- 34 F4.1 s RAs Right ascension (1950.0)
35 A1 --- DE- Declination sign
36- 37 I2 deg DEd Declination (1950.0)
38 A1 --- --- [:]
39- 40 I2 arcmin DEm Declination (1950.0)
41 A1 --- --- [:]
42- 43 I2 arcsec DEs Declination (1950.0)
45- 46 I2 h RA2000h Right ascension (2000.0)
47 A1 --- --- [:]
48- 49 I2 min RA2000m Right ascension (2000.0)
50 A1 --- --- [:]
51- 54 F4.1 s RA2000s Right ascension (2000.0)
55 A1 --- DE2000- Declination sign
56- 57 I2 deg DE2000d Declination (2000.0)
58 A1 --- --- [:]
59- 60 I2 arcmin DE2000m Declination (2000.0)
61 A1 --- --- [:]
62- 63 I2 arcsec DE2000s Declination (2000.0)
65- 70 I6 km/s HRV ?=999999 Heliocentric radial velocity
72- 75 I4 km/s e_HRV ?=9999 Standard error on velocity
77- 78 I2 --- r_HRV Source of velocity (6)
80- 83 A4 --- MType Morphological type (7)
85 I1 --- r_MType Source of type (8)
87- 91 F5.2 mag Btmag Total B magnitude B_t_
93 I1 --- r_Btmag Source of Btmag B_t_ (9)
95- 98 F4.2 --- Eps Ellipticity (10) (22)
100-102 I3 deg PAE ?=999 Position angle for E measurement
See notes (10) (23)
104 A1 --- BandE [ubj] Pass-band for E measurement (11)
105-109 F5.2 mag/arcsec2 IsoE ubj isophote for E measurement
111-115 F5.2 mag U-Bj ?=99.99 (U-B_J_) equal-area colour (20)
117-121 F5.2 mag e_U-Bj ?=99.99 Standard error on U-B_J_
equal-area colour (12)
123-127 F5.2 mag Bj-R ?=99.99 (B_J_-R) equal-area colour
129-133 F5.2 mag e_Bj-R ?=99.99 Standard error on B_J_-R
equal-area colour (12)
%-------------------------------------------------------------------------------
B_J_-band photometric parameters
%-------------------------------------------------------------------------------
135-139 F5.2 mag Bj25 B_J25_ isophotal magnitude (10)
141-146 F6.2 arcsec RadBj25 Mean radius of mu(B_J_)=25 isophote
See notes (10) (24)
148-152 F5.2 mag/arcsec2 SuBrBjc Measured central B_J_ surface brightness
See note (10)
154-158 F5.2 mag/arcsec2 SuBrBj25 Mean surface brightness for mu(B_J_)<=25
See note (10)
160-164 F5.2 mag/arcsec2 Bjoverlap Brightest overlapping Bj isophote (10)
166-170 F5.2 mag BjTot B_Jt_ total magnitude (10) (21)
172-175 F4.2 --- BJRn Sersic parameter n(B_J_) (Plate J9229)
177-181 F5.2 mag/arcsec2 Bj0 Extrapolated Sersic central B_J_ surface
brightness (Plate J9229)
183-191 E9.3 arcsec r0Bj Sersic scale length r_0_(B_J_)
(Plate J9229)
193-194 I2 --- NBj Number of B_J_ isophotes fitted
196 I1 --- r_Bj25 ? Source of non-VPC photometry
B_J25_ (13)
197 A1 --- n_Bj25 Reliabilty of B_J25_ (14)
199 A1 --- n_e_Bj25 [-9] [-] sign of the difference (15)
or 9 when no value (99999)
200-203 F4.2 mag e_Bj25 ?=99.99 Standard error on Bj25 (15)
205-209 F5.2 arcsec e_RadBj25 ?=99.99 Standard error on rBj (16)
211-213 F3.1 mag/arcsec2 e_SuBrBjc ?=9.9 Standard error on central B_J_
surface brightness (16)
215-218 F4.2 mag/arcsec2 e_SuBrBj25 ?=9.99 Standard error mean surface
brightness for mu(B_J_)<=25 (16)
220-222 F3.1 mag/arcsec2 e_Bjoverlap ?=9.9 Standard error on overlapping
B_J_ isophote (16)
%-------------------------------------------------------------------------------
U-band photometric parameters
%-------------------------------------------------------------------------------
224-228 F5.2 mag U25 U_25_ isophotal magnitude
230-235 F6.2 arcsec RadU25 Mean radius of mu(U)=25 isophote (24)
237-241 F5.2 mag/arcsec2 SuBrUc Measured central U surface brightness
243-247 F5.2 mag/arcsec2 SuBrU25 Mean surface brightness for mu(U)<=25
249-253 F5.2 mag/arcsec2 Uoverlap Brightest overlapping U isophote
255-259 F5.2 mag UmagTot U_t_ total magnitude
261-264 F4.2 --- URn Sersic parameter n(U)
266-270 F5.2 mag/arcsec2 U0 Extrapolated Sersic central U surface
brightness
272-280 E9.3 arcsec r0U Sersic scale length r_0(U)
282-283 I2 --- NU Number of U isophotes fitted
%-------------------------------------------------------------------------------
R_C_-band photometric parameters
%-------------------------------------------------------------------------------
285-289 F5.2 mag R24 R_C24_ isophotal magnitude
291-296 F6.2 arcsec RadRc24 Mean radius of mu(R_C_)=24 isophote (24)
298-302 F5.2 mag/arcsec2 SuBrRcc Measured central R_C_ surface brightness
304-308 F5.2 mag/arcsec2 SuBrRc24 Mean surface brightness for mu(R_C_)<=25
310-314 F5.2 mag/arcsec2 Rcoverlap Brightest overlapping R isophote
316-320 F5.2 mag RcTot R_Ct_ total magnitude
322-325 F4.2 --- RcRn Sersic parameter n(R_C_)
327-331 F5.2 mag/arcsec2 Rc0 Extrapolated Sersic central R_C_ surface
brightness
333-341 E9.3 arcsec r0Rc Sersic scale length r_0_(R_C_)
343-344 I2 --- NRc Number of R_C_ isophotes fitted
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Note (1): 1: yes; 0: no
Note (2): 'N': listed in NGC
'I': listed in IC
' ': not listed in either the NGC or IC
Note (4): 'V': listed in VCC of Binggeli et al. (1985AJ.....90.1681B)
' ': not listed in VCC
Note (5): 'm': member of the Virgo Cluster
'p': possible member of the cluster
'b': in the background
Note (6): 1: Karachentsev & Karachentseva (1982PAZh....8..198K)
2: Karachentsev et al. (1983PAZh....9..387K)
3: Binggeli et al. (1985AJ.....90.1681B) [VCC]
4: Rhee & Katgert (1988A&AS...72..243R)
5: de Vaucouleurs et al. (1991, Cat. <VII/155>) [RC3]
6: Binggeli et al. (1993A&AS...98..275B)
7: Drinkwater et al. (1996, Cat. <J/MNRAS/279/595>)
New measurements already made as well as further ones will be added at a
future date, hence two digits have been reserved for this field.
Note (7): E: elliptical
E?: elliptical?
S: spiral
S?: spiral?
S0: lenticular
S0?: lenticular?
I: irregular
I?: irregular?
BCD: blue compact dwarf
BCD?: blue compact dwarf?
pre: pre-merger
pec: peculiar
?: unknown or object defied classification
Velocity data should be used in preference to types as indicators of
cluster membership. Two VPC objects typed as 'BCD?' in the VCC
(Binggeli et al., 1985AJ.....90.1681B) have since been found to be
background objects--probably spirals.
Note (8): 1: VCC (Binggeli et al., 1985AJ.....90.1681B)
2: VPC [this work]
Note (9): 1: Transformed value from VPC B_J_ and R_C_ photometry
New measurements will be added at a future date for objects whose B_J_
and R_C_ VPC photometry was saturated.
Note (10): Mean value for both B_J_-band plates if applicable, otherwise just
based on one plate.
Note (11): 'u'; U band
'b': B band
'j': B_J_ band
Note (12): A standard error value is only quoted here if the relevant colour is
based on the mean of two values [one from Plate U9362 or R2936 and
J9229 and the other from U9362 or R2936 and J4882]. Each observed
error was multiplied by the square root of 2 in order to obtain the
quoted value. The quoted standard error therefore assumes [in the
absence of additional U- or R_C_-band plates] that the errors in the
U- or R_C_-band photometry are, for any particular galaxy, the same
as those in B_J_.
Note (13): 0: if derived from VPC photometry
1: de Vaucouleurs & Pence (1979ApJS...40..425D), table 2
2: de Vaucouleurs & Pence (1979ApJS...40..425D), table 4
3: Binggeli et al. (1984AJ.....89...64B)
4: VCC, Binggeli et al. (1985AJ.....90.1681B)
5: Karachentsev & Karachentseva (1982PAZh....8..198K)
6: average of sources 2 and 4
7: average of sources 4 and 5
9: this work, when estimate made by eye
Note (14): ' ': if B_J_25 derived from VPC photometry (see paper for typical
error values)
'R': if B_J_25 not from VPC photometry but reliable according to
the VCC
'U': if B_J_25 not from VPC photometry and unreliable according to
the VCC
Note (15): A standard error value is only quoted if the relevant B_J_25 value is
based on the mean of two values [one from each of the two B_J_-band
plates]. The standard error is the modulus of the value quoted; the
sign representing the sense of the difference: [ B_J_25(Plate J9229)
minus B_J_25 (Plate J4882) ] /mag.
Note (16): A standard error value is only quoted here if the relevant parameter
is based on the mean of two values [one from each of the two
B_J_-band plates].
Note (20): For an individual galaxy, equal-area colours are significantly more
accurate than total colours derived from two total magnitude values.
However, for the galaxy sample as a whole, the total colours are
likely to suffer from less bias effects.
Note (21): A total magnitude [and any total colour based on it] cannot be
assumed to be reliable if the relevant n value= 0.20 or 3.00 or the
relevant number of isophotal levels fitted = 4 or less, even if only
one pass band is affected.
Note (22): Ellipticities = 1-(B/A) where A & B are the major & minor diameters
respectively. For any detailed study of Virgo galaxy orientations,
it is recommended that the surface photometry itself is used rather
than the values quoted in the main catalogue. This is because most
of the ellipticities quoted in the main catalogue are arbitrarily
based on the mu(B_J24.25_) isophote. Ellipticity does of course
vary from isophote to isophote and from band to band.
Note (23): Position angles = that of the major axis measured from the meridian
through East.
Note (24): Mean radii= SQRT(A*B).
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Byte-by-byte Description of file: bj4882.dat bj9229.dat br2936.dat bu9362.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- VPC VPC number
6- 10 F5.2 mag/arcsec+2 Iso Isophotal surface brightness
12- 16 F5.2 mag IntMag Integrated magnitude
18- 22 F5.2 arcsec Radius Radius
24 A1 --- oFlag [o] Overlap flag (1)
25 A1 --- cFlag [c] Cut flag (2)
27- 30 F4.2 --- Eps ? Ellipticity (3)
32- 34 I3 deg PA ? Position angle (4)
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Note (1): 'o' if isophote overlaps with that of another image or images
' ' if isophote does not overlap any another image
Note (2): 'c' if isophote cut by edge of scan area
' ' if isophote not cut by edge of scan area
Note (3): Ellipticity = 1-(B/A) where A & B are the major & minor diameters
respectively
Note (4): Position angle = that of the major axis measured from the meridian
through East
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Byte-by-byte Description of file: sumcat.dat
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Bytes Format Units Label Explanations
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1- 4 I4 ---- VPC VPC name
5 A1 --- n_VPC [*] *: object saturated in B_J_
7- 8 I2 h RAh Right ascension (1950)
10- 11 I2 min RAm Right ascension (1950)
13- 16 F4.1 s RAs Right ascension (1950)
18 A1 --- DE- Declination sign
19- 20 I2 deg DEd Declination (1950)
22- 23 I2 arcmin DEm Declination (1950)
25- 26 I2 arcsec DEs Declination (1950)
28- 31 I4 --- VCC ? VCC (Binggeli et al., 1985AJ.....90.1681B)
number
32 A1 --- n_VCC [MBP] Note on VCC (1)
34- 38 A5 --- MType Morphological type (2)
39 I1 --- r_MType ? Reference for Mtype (3)
41- 45 F5.2 mag BJ25 Apparent B_J_ magnitude to the 25.0mag/arcsec^2^
isophote
47 I1 --- r_BJ25 ? Reference for BJ25 (4)
49- 52 F4.2 mag e_BJ25 ? rms uncertainty on BJ25
53 A1 --- n_BJ25 [RU] R (reliable) or U (unreliable) from the VCC
55- 59 F5.2 mag BjTot ? Total extrapolated magnitude
61- 65 F5.2 mag BTot ? Transformed Bt (total extrapolated) magnitude
67- 70 F4.2 --- n ? B_J_ band Sersic profile shape parameter
72- 76 F5.2 mag/arcsec2 mu0 ? B_J_ band Sersic extrapolated central
surface brightness
78- 86 E9.3 --- r0 ? B_J_ band Sersic scale length parameter
88- 92 F5.2 mag U-Bj ? U-B_J_ equal-area colour (5)
94- 97 F4.2 mag Bj-Rc ? (B_J_-R_C_) equal-area colour
99-103 I5 km/s HRV ? Heliocentric radial velocity
105 I1 --- r_HRV ? Reference for HRV (6)
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Note (1): B: background
P: possible member
M: member
Note (2): Morphological type coded as:
' E': elliptical
' E?': elliptical?
' S': spiral
' S?': spiral?
' S0': lenticular
' S0?': lenticular?
' I': irregular
' I?': irregular?
' BCD': blue compact dwarf
'BCD?': blue compact dwarf?
' pre': pre-merger
' pec': peculiar
Object that defied classification being assigned "?"
Note (3): 1: VCC (Binggeli et al., 1985AJ.....90.1681B)
2: this work
Note (4): The value of BJ25 is the mean of two values independently derived
from Plates J4882 and J9229, except when r_BJ25 not empty.
1: de Vaucouleurs & Pence (1979ApJS...40..425D), table2
2: de Vaucouleurs & Pence (1979ApJS...40..425D), table4
3: Binggeli et al. (1984AJ.....89...64B)
4: Binggeli et al. (1985AJ.....90.1681B)
5: Karachentsev & Karachentseva (1982PAZh....8..198K)
6: Mean of the sources 1 and 4
7: Mean of the sources 2 and 4
8: Mean of the sources 4 and 5
9: this work when an estimate was made by the authors by eye
Note (5): U-B_J_ equal-area colour if relevant VPC photometry unsaturated
and not heavily merged (estimated mean error of ~0.2mag), or
(U-0.65B-0.35V)_T_ from the RC3 whenever possible if VPC photometry
saturated
Note (6): 1: Karachentsev & Karachentseva (1982PAZh....8..198K)
2: Karachentsev et al. (1983PAZh....9..387K)
3: Binggeli et al. (1985AJ.....90.1681B)
4: Rhee & Katgert (1988A&AS...72..243R)
5: de Vaucouleurs et al. (1991, Cat. <VII/155>), RC3
6: Binggeli et al. (1993A&AS...98..275B)
7: Drinkwater et al. (1996, Cat. <J/MNRAS/279/595>)
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Acknowledgements: Christopher Ke-shih Young <cky@vega.bac.pku.edu.cn>
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(End) Chris Young [BAO] 27-May-1998