Information on Service 'Optical Polarimetric Catalog for the SMC'

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An optical polarimetric catalog for the Small Magelanic Cloud (SMC) is presented. It gives intrinsic and observed polarizations in the V-band for a total of 7207 stars located in the Northeast and Wing sections of the SMC and part of the Magellanic Bridge.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Optical Polarimetric Catalog for the SMC'

Overview

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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.

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
MAXREC Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
pol_int Pol_int Intrinsic polarisation in per cent of total flux, obtained by substracting the foreground polarization due to Milky Way dust from the observed polarization pol_obs. See paper, chapter 3, for details on foreground determination. N/A N/A
pol_obs Pol_obs Observed polarization in percent of total flux, obtained by determining the Q and U stokes parameters from V photometry in four different angles. N/A N/A
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
RESPONSEFORMAT Output Format File format requested for output. N/A meta.code.mime
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
vmag m_V V band magnitude obtained by summing up the flux of the image pair in one frame and calibrating against several published catalogs (see Table 3 in the paper). mag phot.mag;em.opt.V

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
ct Id Object running number N/A meta.id;meta.main
dej2000 Dec Object Declination ICRS deg pos.eq.dec;meta.main
e_pol_int Err. Pol_int Error on the intrinsic polarisation, including errors on observed polarisation and the estimate of the polarization due to forground dust. N/A N/A
e_pol_obs Err. Pol_obs Error in observed polarization including pixel noise. The error is given in percent of the total flux. N/A N/A
e_vmag Err. m_V Error in V band magnitude, including photon noise and dispersion in the magnitude calibration. mag stat.error;phot.mag;em.opt.V
pa_pol_int PA Pol_int Position angle of the intrinsic polarisation deg N/A
pa_pol_obs PA Pol_obs Position angle of the observed polarization deg N/A
pol_int Pol_int Intrinsic polarisation in per cent of total flux, obtained by substracting the foreground polarization due to Milky Way dust from the observed polarization pol_obs. See paper, chapter 3, for details on foreground determination. N/A N/A
pol_obs Pol_obs Observed polarization in percent of total flux, obtained by determining the Q and U stokes parameters from V photometry in four different angles. N/A N/A
raj2000 RA Object Right Ascension ICRS deg pos.eq.ra;meta.main
vmag m_V V band magnitude obtained by summing up the flux of the image pair in one frame and calibrating against several published catalogs (see Table 3 in the paper). mag phot.mag;em.opt.V

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
ct Id Object running number N/A meta.id;meta.main 1
raj2000 RA Object Right Ascension ICRS deg pos.eq.ra;meta.main 1
dej2000 Dec Object Declination ICRS deg pos.eq.dec;meta.main 1
pol_obs Pol_obs Observed polarization in percent of total flux, obtained by determining the Q and U stokes parameters from V photometry in four different angles. N/A N/A 1
pa_pol_obs PA Pol_obs Position angle of the observed polarization deg N/A 1
pol_int Pol_int Intrinsic polarisation in per cent of total flux, obtained by substracting the foreground polarization due to Milky Way dust from the observed polarization pol_obs. See paper, chapter 3, for details on foreground determination. N/A N/A 1
pa_pol_int PA Pol_int Position angle of the intrinsic polarisation deg N/A 1
vmag m_V V band magnitude obtained by summing up the flux of the image pair in one frame and calibrating against several published catalogs (see Table 3 in the paper). mag phot.mag;em.opt.V 1
_r Dist. Distance to cone center deg pos.distance 10
e_pol_obs Err. Pol_obs Error in observed polarization including pixel noise. The error is given in percent of the total flux. N/A N/A 11
e_pol_int Err. Pol_int Error on the intrinsic polarisation, including errors on observed polarisation and the estimate of the polarization due to forground dust. N/A N/A 11
e_vmag Err. m_V Error in V band magnitude, including photon noise and dispersion in the magnitude calibration. mag stat.error;phot.mag;em.opt.V 11

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