Information on Service 'A Catalog of Galaxies in the Direction of the Perseus Cluster'

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This is a catalog of 5437 morphologically classified sources in the direction of the Perseus galaxy cluster core, among them 496 early-type low-mass galaxy candidates. The catalog is primarily based on V-band imaging data acquired with the William Herschel Telescope. Additionally, we used archival Subaru multiband imaging data in order to measure aperture colors and to perform a morphological classification. The catalog reaches its 50 per cent completeness limit at an absolute V-band luminosity of -12 mag and a V-band surface brightness of 26 mag arcsec^-2 . In addition to the published table, this service also contains cutout images of the objects investigated.

For a list of all services and tables belonging to this service's resource, see Information on resource 'A Catalog of Galaxies in the Direction of the Perseus Cluster'

Overview

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Coverage

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Other services provided on the underlying data include:

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
hscs_pos Position/Name Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object N/A N/A
hscs_sr Search radius Search radius in arcminutes N/A N/A
mag Mag Integrated V-band apparent magnitude corrected for extinction. mag phot.mag;em.opt.V
maxrec Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
mu50 S.B. in R_50 Effective V band surface brightness within R_50 corrected for extinction mag.arcsec**-2 phot.mag.sb
r_50 R_50 Half-light radius in the V band.. arcsec phys.angsize
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
responseformat Output Format File format requested for output. N/A meta.code.mime
sersic_index Sérsic Sérsic index, upper limit constrained to 4 (cf. paper, sect. 4.3) N/A stat.fit.param
SR Search Radius Search radius deg N/A
verb Verbosity Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns. N/A N/A

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
_r Dist. Distance to cone center deg pos.distance
a_v A_V V-band galactic foreground extinction. mag phys.absorption;em.opt.V
b_a b/a Axis ratio in the V band for sources fitted with GALFIT (pflag = 1 .. 8) N/A phys.angsize;arith.ratio
cutout_link Image Link to a FITS cutout for this source from an r-band mosaic. See datalink for additional retrieval options. N/A meta.ref.url
dec Dec ICRS Declination from WHT image deg pos.eq.dec;meta.main
err_mag Err. Mag Error in integrated apparent magnitude for sources fitted with GALFIT (i.e., pflag = 1 .. 8; NULL otherwise) mag stat.error;phot.mag;em.opt.V
err_pa Err. P.A. Error in position angle. deg stat.error;pos.posang
err_r_50 Err. R_50 Error in half-light radius in the V band. arcsec stat.error;phys.angsize
g_r_1 g-r, Ap 1 Subaru g-r for aperture 1, color corrected for extinction. (r_aper1 = 1 R50 for sources with R50 > 4 pixels, r_aper1 = 4 pixels for sources with R50 <= 4 pixels) mag phot.color;em.opt.V;em.opt.R
g_r_2 g-r, Ap 2 Subaru g-r for aperture 2, color corrected for extinction. (only for sources with R50 > 4 pixels, where r_aper2 = 2 R50) mag phot.color;em.opt.V;em.opt.R
mag Mag Integrated V-band apparent magnitude corrected for extinction. mag phot.mag;em.opt.V
morphology Morphology Morphological classification N/A src.class
mu50 S.B. in R_50 Effective V band surface brightness within R_50 corrected for extinction mag.arcsec**-2 phot.mag.sb
nucleation Nucleation Remark on nucleation N/A src.class
object_name Name Identifier from Wittman et al (2019). N/A meta.id;meta.main
pa P.A. Position Angle for sources fitted with GALFIT and b_a < 0.9 [North/Up=0, East/Left=90]; from V band. deg pos.posang
r_50 R_50 Half-light radius in the V band.. arcsec phys.angsize
r_z_1 r-z, Ap 1 Subaru r-z for aperture 1, color corrected for extinction. (r_aper1 = 1 R50 for sources with R50 > 4 pixels, r_aper1 = 4 pixels for sources with R50 <= 4 pixels) mag phot.color;em.opt.R;em.opt.I
r_z_2 r-z, Ap 2 Subaru r-z for aperture 2, color corrected for extinction. (only for sources with R50 > 4 pixels, where r_aper2 = 2 R50) mag phot.color;em.opt.R;em.opt.I
ra RA ICRS Right Ascension from WHT image deg pos.eq.ra;meta.main
resflag Res? 1 if there were significant residuals after substracting GALFIT model, 0 otherwise. This is only given for sources fitted with GALFIT (i.e., pflag = 1 .. 8) N/A meta.code.qual
sersic_index Sérsic Sérsic index, upper limit constrained to 4 (cf. paper, sect. 4.3) N/A stat.fit.param

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
ra RA ICRS Right Ascension from WHT image deg pos.eq.ra;meta.main 1
dec Dec ICRS Declination from WHT image deg pos.eq.dec;meta.main 1
mag Mag Integrated V-band apparent magnitude corrected for extinction. mag phot.mag;em.opt.V 1
r_50 R_50 Half-light radius in the V band.. arcsec phys.angsize 1
morphology Morphology Morphological classification N/A src.class 1
nucleation Nucleation Remark on nucleation N/A src.class 1
cutout_link Image Link to a FITS cutout for this source from an r-band mosaic. See datalink for additional retrieval options. N/A meta.ref.url 1
object_name Name Identifier from Wittman et al (2019). N/A meta.id;meta.main 5
_r Dist. Distance to cone center deg pos.distance 10
err_mag Err. Mag Error in integrated apparent magnitude for sources fitted with GALFIT (i.e., pflag = 1 .. 8; NULL otherwise) mag stat.error;phot.mag;em.opt.V 11
err_r_50 Err. R_50 Error in half-light radius in the V band. arcsec stat.error;phys.angsize 11
mu50 S.B. in R_50 Effective V band surface brightness within R_50 corrected for extinction mag.arcsec**-2 phot.mag.sb 15
sersic_index Sérsic Sérsic index, upper limit constrained to 4 (cf. paper, sect. 4.3) N/A stat.fit.param 15
b_a b/a Axis ratio in the V band for sources fitted with GALFIT (pflag = 1 .. 8) N/A phys.angsize;arith.ratio 15
pa P.A. Position Angle for sources fitted with GALFIT and b_a < 0.9 [North/Up=0, East/Left=90]; from V band. deg pos.posang 15
err_pa Err. P.A. Error in position angle. deg stat.error;pos.posang 15
a_v A_V V-band galactic foreground extinction. mag phys.absorption;em.opt.V 15
resflag Res? 1 if there were significant residuals after substracting GALFIT model, 0 otherwise. This is only given for sources fitted with GALFIT (i.e., pflag = 1 .. 8) N/A meta.code.qual 15
g_r_1 g-r, Ap 1 Subaru g-r for aperture 1, color corrected for extinction. (r_aper1 = 1 R50 for sources with R50 > 4 pixels, r_aper1 = 4 pixels for sources with R50 <= 4 pixels) mag phot.color;em.opt.V;em.opt.R 15
r_z_1 r-z, Ap 1 Subaru r-z for aperture 1, color corrected for extinction. (r_aper1 = 1 R50 for sources with R50 > 4 pixels, r_aper1 = 4 pixels for sources with R50 <= 4 pixels) mag phot.color;em.opt.R;em.opt.I 15
g_r_2 g-r, Ap 2 Subaru g-r for aperture 2, color corrected for extinction. (only for sources with R50 > 4 pixels, where r_aper2 = 2 R50) mag phot.color;em.opt.V;em.opt.R 15
r_z_2 r-z, Ap 2 Subaru r-z for aperture 2, color corrected for extinction. (only for sources with R50 > 4 pixels, where r_aper2 = 2 R50) mag phot.color;em.opt.R;em.opt.I 15
err_mu50 Err. S.B. Error in the effective surface brightness propagated from err_mag and err_r_50 mag.arcsec**-2 stat.error;phot.mag.sb 25
err_sersic_index Err. S.E. Error in Sérsic index for sources fitted with GALFIT with free N parameter (pflag = 1) N/A stat.error;stat.fit.param 25
err_b_a Err. b/a Error in axis ratio for sources fitted with GALFIT with free B/A parameter (pflag = 1 - 4) N/A stat.error;phys.angsize;arith.ratio 25
pflag Phot Proc? Photometry processing flag (see note). Note p N/A meta.code 25
bgflag Bg? Background fitted with: ...0: Galfit; ...1: SExtractor with BACK_SIZE = 256 pixel background map, ...2: like 1, but BACK_SIZE = 32 pixel N/A meta.code 25
err_g_r_1 Err, g-r 1 Error in g-r for aperture 1 mag phot.color;em.opt.V;em.opt.R 25
err_r_z_1 Err, r-z 1 Error in r-z for aperture 1 mag phot.color;em.opt.R;em.opt.I 25
err_g_r_2 Err, g-r 2 Error in g-r for aperture 2 mag phot.color;em.opt.V;em.opt.R 25
err_r_z_2 Err, r-z 2 Error in r-z for aperture 2 mag phot.color;em.opt.R;em.opt.I 25
g_r_flag g-r? 1 if g-r photometry possibly comtaminated through bleeding trails of bright stars within 3 arcsec, 0 otherwise N/A meta.code.qual 25
r_z_flag r-z? 1 if r-z photometry possibly comtaminated through bleeding trails of bright stars within 3 arcsec, 0 otherwise N/A meta.code.qual 25
a_g A_g g-band galactic foreground extinction. mag phys.absorption;em.opt.V 25
a_r A_r r-band galactic foreground extinction. mag phys.absorption;em.opt.R 25
a_z A_z z-band galactic foreground extinction. mag phys.absorption;em.opt.I 25

Citation Info

VOResource XML (that's something exclusively for VO nerds)

Note p

The photometry processing flag means:

1:Galfit: Sérsic fit with free parameters
2:Galfit: Sérsic fit with free parameters but constrained N = 4
3:Galfit: Sérsic fit with fixed N (derived from Petrosian concentration r_90/r_50, see Wittmann et al. 2019, Sect. 4.3)
4:Galfit: Sérsic fit with fixed N and position
5:Galfit: Sérsic fit with fixed N and B/A = 0.1
6:Galfit: Sérsic fit with fixed N, R50 = 0.5 pixel, and B/A = 1
7:Galfit: Sérsic fit with fixed N, position, and B/A = 0.1
8:Galfit: Sérsic fit with fixed N, position, R50 = 0.5 pixel, and B/A = 1
9:Petrosian photometry