Information on Service 'Apertif Time Domain FRB observation cone search (DR1)'

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This is the first release of data from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performs real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reaches coherent-addition sensitivity over the entire field of the view of the primary- dish beam. After commissioning results verified the system performed as planned, we initiated the Apertif FRB survey (ALERT). Over the first 5 weeks we observed at design sensitivity in 2019, we detected 5 new FRBs, and interferometrically localised each of these to 0.4−10 sq. arcmin. All detections are broad band and very narrow, of order 1 ms duration, and unscattered. Dispersion measures are generally high. Please note that the ARTS DR1 collection available from this end-point is superseded by the ARTS DR2 collection. DR2 includes all data from the DR1 collection that can be queried here. The ARTS DR2 FRB observation cone search can be reached at https://vo.astron.nl/arts_dr2/q/obs_cone/form.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Apertif Time Domain Data Release'

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
compound_beam Compound Beam N/A N/A N/A
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
detection Detection N/A N/A N/A
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 Target Name Name of the target. Matches also partial input (e.g. T1403+5324 or 1403+5324). N/A N/A
tied_array_beam Tied Array Beam N/A N/A N/A
time_min Observation start time N/A d time.start;obs.exposure
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 PSRFITS file N/A N/A meta.ref.url
compound_beam Compound Beam N/A N/A N/A
dec Declination N/A deg pos.eq.dec;meta.main
detection Detection 1 if an FRB was detected, 0 for a non-detection. N/A N/A
filesize File size N/A kbyte phys.size;meta.file
frb FRB identifier Name of the FRB if detected, linking to the FRB properties. None if non-detection. N/A N/A
obs_title Observation Title N/A N/A meta.id;meta.main
obsid Dataset ID ID of the data set N/A N/A
ra Right ascension N/A deg pos.eq.ra;meta.main
t_exptime Exposure time N/A s time.duration;obs.exposure
target Observation target Name of the observed target N/A N/A
tied_array_beam Tied Array Beam N/A N/A N/A
time_max Observation end time N/A d time.end;obs.exposure
time_min Observation start time N/A d time.start;obs.exposure
time_steps Number of time bins N/A N/A N/A

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 PSRFITS file N/A N/A meta.ref.url 1
_r Dist. Distance to cone center deg pos.distance 10
target Observation target Name of the observed target N/A N/A 20
ra Right ascension N/A deg pos.eq.ra;meta.main 20
dec Declination N/A deg pos.eq.dec;meta.main 20
time_min Observation start time N/A d time.start;obs.exposure 20
time_max Observation end time N/A d time.end;obs.exposure 20
detection Detection 1 if an FRB was detected, 0 for a non-detection. N/A N/A 20
frb FRB identifier Name of the FRB if detected, linking to the FRB properties. None if non-detection. N/A N/A 20
obs_title Observation Title N/A N/A meta.id;meta.main 20
obsid Dataset ID ID of the data set N/A N/A 20
compound_beam Compound Beam N/A N/A N/A 20
tied_array_beam Tied Array Beam N/A N/A N/A 20
t_exptime Exposure time N/A s time.duration;obs.exposure 20
time_steps Number of time bins N/A N/A N/A 20
filesize File size N/A kbyte phys.size;meta.file 20

Copyright, License, Acknowledgements

If you use this data, cite van Leeuwen et al. 2023 (2023A&A...672A.117V). The ARTS data release is licensed under the Creative Commons Attribution 3.0 License

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