J/A+AS/127/367 Virgo Photometry Catalogue (VPC) (Young+ 1998) ================================================================================ The "Virgo photometry catalogue"; a catalogue of 1180 galaxies in the direction of the Virgo Cluster's core Young C.K., Currie M.J. =1998A&AS..127..367Y (SIMBAD/NED BibCode) ================================================================================ 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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Note on catalog.dat: mu(B_J_) denotes surface B_J_ brightness in mag/arcsec^2^. -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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. ) ? (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 -------------------------------------------------------------------------------- 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. ) [RC3] 6: Binggeli et al. (1993A&AS...98..275B) 7: Drinkwater et al. (1996, Cat. ) 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). -------------------------------------------------------------------------------- Byte-by-byte Description of file: bj4882.dat bj9229.dat br2936.dat bu9362.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Byte-by-byte Description of file: sumcat.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- 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. ), RC3 6: Binggeli et al. (1993A&AS...98..275B) 7: Drinkwater et al. (1996, Cat. ) -------------------------------------------------------------------------------- Acknowledgements: Christopher Ke-shih Young ================================================================================ (End) Chris Young [BAO] 27-May-1998