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Information on Service 'SMAKCED H-band images of Early-Type Virgo Dwarf Galaxies'

The Stellar content, MAss and Kinematics of Cluster Early-type Dwarf galaxies (SMAKCED) project is a survey of 121 Virgo cluster early type galaxies. This service publishes deep near-infrared (H band) images obtained by SMAKCED together with resulting decompositions and other properties of the galaxies in the sample.

For a list of all services and tables belonging to this service's resource, see Information on resource 'A Near-infrared Census of the Multicomponent Stellar Structure of Early-type Dwarf Galaxies in the Virgo Cluster'

Service Documentation

The images are calibrated such that

mag_H = -2.5 log(counts)

(in the 2MASS photometric system) without the need for an additional zeropoint. Extinction correction according to 1998ApJ...500..525S is already applied to these values.

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, gavo means it is within GAVO's service 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
dateObs Approx. date Approximate observation date (essentially, month and year should be about right). NULL for archival material d VOX:Image_MJDateObs
FORMAT Output format Requested format of the image data N/A N/A
hFORMAT Output format Requested format of the image data N/A N/A
hINTERSECT Intersection type Relation of image and specified Region of Interest. N/A N/A
hPOS Position ICRS Position, RA,DEC, or Simbad object (e.g., 234.234,-32.45) deg pos.eq
hSIZE Field size Size in decimal degrees (e.g., 0.2 or 1,0.1) deg N/A
INTERSECT Intersection type Relation of image and specified Region of Interest. N/A N/A
object Target Object VCC identifier (like 'VCC0009') N/A meta.name
POS Position ICRS Position, RA,DEC decimal degrees (e.g., 234.234,-32.46) deg pos.eq
SIZE Field size Size in decimal degrees (e.g., 0.2 or 1,0.1) deg 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
accref Product key Access key for the data N/A N/A
accsize File size Size of the data in bytes byte VOX:Image_FileSize
b_a b/a Axis raio at 2 r_e N/A phys.angSize;arith.ratio
bandpassHi Band upper Upper limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_HiLimit
bandpassId Bandpass Freeform name of the bandpass used N/A VOX:BandPass_ID
bandpassLo Band lower Lower limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_LoLimit
bandpassRefval Band Ref. Characteristic quantity for the bandpass of the image m VOX:BandPass_RefValue
bandpassUnit Bandpass unit Unit of bandpass specifications (always m). N/A VOX:BandPass_Unit
centerAlpha Ctr. RA Approximate center of image, RA deg POS_EQ_RA_MAIN
centerDelta Ctr. Dec Approximate center of image, Dec deg POS_EQ_DEC_MAIN
compmorph Add. info Additional information on decomposition. N/A meta.note;src.morph
concentration C Concentration index 5 log_80/r_20 as in 2000AJ....119.2645B N/A phys.size;arith.ratio
coverage Coverage Field covered by the image deg N/A
dateObs Approx. date Approximate observation date (essentially, month and year should be about right). NULL for archival material d VOX:Image_MJDateObs
dej2000 Dec ICRS Declination of galaxy center from asymmetry centering (unless specified otherwise in remarks). deg pos.eq.dec;meta.main
embargo Embargo ends Date the data will become/became public a N/A
exptime Exp. time Total integration time for the object (sum of exposure times of all images stacked; note that different telescopes were in use). s time.duration;obs.exposure
finaldec_evi EVI(finaldec) Excess variance index (2011MNRAS.411.2439H) for final decomposition N/A stat.fit.goodness
finaldec_rff RFF(finaldec) Residual flux fraction (2006ApJ...644...30B) for the final decomposition N/A stat.fit.goodness
hmag m_H Total H-band magnitude of the galaxy N/A phot.mag;em.ir.H
imageTitle Title Synthetic name of the image N/A VOX:Image_Title
inner_b_a b/a(inner) Axis ratio, inner component N/A phys.angSize;arith.ratio
inner_m m(inner) Integrated H-band brightness, inner component mag phot.mag;em.ir.H
inner_n n(inner) Sérsic index, inner component N/A stat.fit.param
inner_rc r_c(inner) Half-light radius, inner component arcsec phys.angSize;src
instId Instrument Identifier of the originating instrument N/A INST_ID
mime Type MIME type of the file served N/A N/A
moreinfo More Bibcodes of papers containing more information. N/A meta.ref
nAxes #axes Number of axes in data N/A VOX:Image_Naxes
OBJECT Galaxy name Common name of the observed galaxy. N/A meta.id;meta.main
outer_b_a b/a(outer) Axis ratio, global/outer component N/A phys.angSize;arith.ratio
outer_m m(outer) Integrated H-band brightness, global/outer component mag phot.mag;em.ir.H
outer_n n(outer) Sérsic index, global/outer component N/A stat.fit.param
outer_rc r_c(outer) Half-light radius, global/outer component arcsec phys.angSize;src
owner Owner Owner of the data N/A N/A
pixelScale Scales The pixel scale on each image axis deg/pix VOX:Image_Scale
pixelSize Axes Lengths Number of pixels along each of the axes pix VOX:Image_Naxis
pixflags P. Flags Flags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display only N/A VOX:Image_PixFlags
r_e r_e Effective radius of the galaxy (semi-major axis of half-light aperture in H). arcsec phys.angSize
raj2000 RA ICRS RA of galaxy center from asymmetry centering (unless specified otherwise in remarks). deg pos.eq.ra;meta.main
refFrame Ref. Frame Coordinate system reference frame N/A VOX:STC_CoordRefFrame
remarks Remarks Morphological features from 2006AJ....132.2432L and other remarks N/A meta.note
rho10 log ρ_10 Local projected number density of cluster galaxies. (see Appendix D in the source) log(deg**-2) src.density
seeing Seeing Estimate for the seeing at observation time. arcsec instr.obsty.seeing
simp_b_a b/a(simp) Axis ratio, simple model N/A phys.angSize;arith.ratio
simp_m m(simp) Integrated H-band brightness, simple model mag phot.mag;em.ir.H
simp_n n(simp) Sérsic index, simple model N/A stat.fit.param
simp_rc r_c(simp) Half-light radius, simple model arcsec phys.angSize;src
simpdec_evi EVI(simpdec) Excess variance index (2011MNRAS.411.2439H) for single decomposition N/A stat.fit.goodness
simpdec_rff RFF(simpdec) Residual flux fraction (2006ApJ...644...30B) for the single decomposition N/A stat.fit.goodness
snr S/N Signal to noise ratio for a pixel at 2 r_e. N/A stat.snr
structgroup Group Structural Group (see 2012ApJ...745L..24J) resulting from the decomposition. N/A meta.code.class
wcs_cdmatrix CD matrix FITS WCS CDij matrix deg/pix VOX:WCS_CDMatrix
wcs_equinox Equinox Equinox of the given coordinates yr VOX:STC_CoordEquinox
wcs_projection Proj. FITS WCS projection type N/A VOX:WCS_CoordProjection
wcs_refPixel Ref. pixel WCS reference pixel pix VOX:WCS_CoordRefPixel
wcs_refValues Ref. values World coordinates at WCS reference pixel deg VOX:WCS_CoordRefValue

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
centerAlpha Ctr. RA Approximate center of image, RA deg POS_EQ_RA_MAIN 0
centerDelta Ctr. Dec Approximate center of image, Dec deg POS_EQ_DEC_MAIN 0
imageTitle Title Synthetic name of the image N/A VOX:Image_Title 0
accref Product key Access key for the data N/A N/A 1
dateObs Approx. date Approximate observation date (essentially, month and year should be about right). NULL for archival material d VOX:Image_MJDateObs 1
raj2000 RA ICRS RA of galaxy center from asymmetry centering (unless specified otherwise in remarks). deg pos.eq.ra;meta.main 9
dej2000 Dec ICRS Declination of galaxy center from asymmetry centering (unless specified otherwise in remarks). deg pos.eq.dec;meta.main 9
bandpassId Bandpass Freeform name of the bandpass used N/A VOX:BandPass_ID 10
accsize File size Size of the data in bytes byte VOX:Image_FileSize 11
pixelScale Scales The pixel scale on each image axis deg/pix VOX:Image_Scale 12
instId Instrument Identifier of the originating instrument N/A INST_ID 15
pixelSize Axes Lengths Number of pixels along each of the axes pix VOX:Image_Naxis 15
OBJECT Galaxy name Common name of the observed galaxy. N/A meta.id;meta.main 15
exptime Exp. time Total integration time for the object (sum of exposure times of all images stacked; note that different telescopes were in use). s time.duration;obs.exposure 15
seeing Seeing Estimate for the seeing at observation time. arcsec instr.obsty.seeing 15
snr S/N Signal to noise ratio for a pixel at 2 r_e. N/A stat.snr 15
hmag m_H Total H-band magnitude of the galaxy N/A phot.mag;em.ir.H 15
r_e r_e Effective radius of the galaxy (semi-major axis of half-light aperture in H). arcsec phys.angSize 15
b_a b/a Axis raio at 2 r_e N/A phys.angSize;arith.ratio 15
concentration C Concentration index 5 log_80/r_20 as in 2000AJ....119.2645B N/A phys.size;arith.ratio 15
rho10 log ρ_10 Local projected number density of cluster galaxies. (see Appendix D in the source) log(deg**-2) src.density 15
remarks Remarks Morphological features from 2006AJ....132.2432L and other remarks N/A meta.note 15
structgroup Group Structural Group (see 2012ApJ...745L..24J) resulting from the decomposition. N/A meta.code.class 15
compmorph Add. info Additional information on decomposition. N/A meta.note;src.morph 17
simp_m m(simp) Integrated H-band brightness, simple model mag phot.mag;em.ir.H 19
simp_rc r_c(simp) Half-light radius, simple model arcsec phys.angSize;src 19
simp_n n(simp) Sérsic index, simple model N/A stat.fit.param 19
simp_b_a b/a(simp) Axis ratio, simple model N/A phys.angSize;arith.ratio 19
inner_m m(inner) Integrated H-band brightness, inner component mag phot.mag;em.ir.H 19
inner_rc r_c(inner) Half-light radius, inner component arcsec phys.angSize;src 19
inner_n n(inner) Sérsic index, inner component N/A stat.fit.param 19
inner_b_a b/a(inner) Axis ratio, inner component N/A phys.angSize;arith.ratio 19
outer_m m(outer) Integrated H-band brightness, global/outer component mag phot.mag;em.ir.H 19
outer_rc r_c(outer) Half-light radius, global/outer component arcsec phys.angSize;src 19
outer_n n(outer) Sérsic index, global/outer component N/A stat.fit.param 19
outer_b_a b/a(outer) Axis ratio, global/outer component N/A phys.angSize;arith.ratio 19
mime Type MIME type of the file served N/A N/A 20
nAxes #axes Number of axes in data N/A VOX:Image_Naxes 20
refFrame Ref. Frame Coordinate system reference frame N/A VOX:STC_CoordRefFrame 20
wcs_equinox Equinox Equinox of the given coordinates yr VOX:STC_CoordEquinox 20
wcs_projection Proj. FITS WCS projection type N/A VOX:WCS_CoordProjection 20
wcs_refPixel Ref. pixel WCS reference pixel pix VOX:WCS_CoordRefPixel 20
wcs_refValues Ref. values World coordinates at WCS reference pixel deg VOX:WCS_CoordRefValue 20
wcs_cdmatrix CD matrix FITS WCS CDij matrix deg/pix VOX:WCS_CDMatrix 20
bandpassUnit Bandpass unit Unit of bandpass specifications (always m). N/A VOX:BandPass_Unit 20
bandpassRefval Band Ref. Characteristic quantity for the bandpass of the image m VOX:BandPass_RefValue 20
bandpassHi Band upper Upper limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_HiLimit 20
bandpassLo Band lower Lower limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_LoLimit 20
pixflags P. Flags Flags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display only N/A VOX:Image_PixFlags 20
coverage Coverage Field covered by the image deg N/A 20
moreinfo More Bibcodes of papers containing more information. N/A meta.ref 20
simpdec_rff RFF(simpdec) Residual flux fraction (2006ApJ...644...30B) for the single decomposition N/A stat.fit.goodness 22
simpdec_evi EVI(simpdec) Excess variance index (2011MNRAS.411.2439H) for single decomposition N/A stat.fit.goodness 22
finaldec_rff RFF(finaldec) Residual flux fraction (2006ApJ...644...30B) for the final decomposition N/A stat.fit.goodness 22
finaldec_evi EVI(finaldec) Excess variance index (2011MNRAS.411.2439H) for final decomposition N/A stat.fit.goodness 22
owner Owner Owner of the data N/A N/A 25
embargo Embargo ends Date the data will become/became public a N/A 25

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