Information on Service 'S) Apertif DR1 - Field calibrated visibilities'

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Further access options are discussed below

This service queries the calibrated visibilities of the fields of the Apertif DR1 data collection. This data release contains continuum images, HI cubes, polarization cubes and other ancillary data (e.g. raw and calibrated visibilities). The imaging survey is split into two tiers: a wide-shallow tier consisting of a single observation per field and a medium-deep tier consisting of ten observations per field. The imaging survey footprint can be found in Imaging Survey Overview while the area covered by the DR1 can be found Apertif DR1 dataproducts description. In this service query provides for each field the calibrated visibilities in UVFITS format. The frequency range covered by these datasets is 150 MHz and the frequency resolution is 12.2 kHz and the central frequency is 1361.25 MHz. Please find more details in the Apertif DR1 documentation.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Apertif DR-1'

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:

Spatial Coverage

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
beam Beam number Beam number N/A meta.id
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
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
target Field Name Name of the field. Matches also partial input (e.g. m1403+5324 or 1403+5324). N/A meta.id
task_id Task ID Observation id N/A meta.id
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
accref Access Access url for the data N/A N/A
bandwidth Band width N/A MHz em.frequency
beam Beam ID N/A N/A meta.id
central_frequency Ctr. frequency N/A MHz em.frequency
dataproduct_subtype Sub type N/A N/A meta.id
dataproduct_type Type N/A N/A meta.id
dec Declination N/A deg pos.eq.dec;meta.main
duration Duration N/A h time.duration;obs.exposure
equinox equinox N/A N/A meta.text
FOV FOV N/A deg phys.angSize;instr.fov
n_channels # channels N/A N/A meta.number
obsid Obs ID N/A N/A meta.id
product_key Product Key N/A N/A meta.id
pub_did P. DID Dataset identifier assigned by the publisher N/A meta.id;meta.main
quality quality N/A N/A meta.id
ra Right ascension N/A deg pos.eq.ra;meta.main
t_max End time N/A N/A time.end;obs.exposure
t_min Start time N/A N/A time.start;obs.exposure
target Target name N/A N/A meta.id
task_id Task ID N/A N/A meta.id

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
accref Access Access url for the data N/A N/A 1
_r Dist. Distance to cone center deg pos.distance 10
pub_did P. DID Dataset identifier assigned by the publisher N/A meta.id;meta.main 15
target Target name N/A N/A meta.id 20
ra Right ascension N/A deg pos.eq.ra;meta.main 20
dec Declination N/A deg pos.eq.dec;meta.main 20
beam Beam ID N/A N/A meta.id 20
FOV FOV N/A deg phys.angSize;instr.fov 20
central_frequency Ctr. frequency N/A MHz em.frequency 20
n_channels # channels N/A N/A meta.number 20
bandwidth Band width N/A MHz em.frequency 20
t_min Start time N/A N/A time.start;obs.exposure 20
t_max End time N/A N/A time.end;obs.exposure 20
duration Duration N/A h time.duration;obs.exposure 20
task_id Task ID N/A N/A meta.id 20
obsid Obs ID N/A N/A meta.id 20
dataproduct_type Type N/A N/A meta.id 20
dataproduct_subtype Sub type N/A N/A meta.id 20
product_key Product Key N/A N/A meta.id 20
equinox equinox N/A N/A meta.text 20
quality quality N/A N/A meta.id 20

Copyright, License, Acknowledgements

APERTIF-DR1 is licensed under the Creative Commons Attribution 3.0 License

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