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

You can access this service using:

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.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.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

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