Information on Service 'Apertif Time Domain FRB detection cone search (DR2)'

Further access options are discussed below

This is the final, full data release from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performed real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reached coherent-addition sensitivity over the entire field of the view of the primary- dish beam. The Apertif FRB survey (ALERT) detected 24 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, with high dispersion measures. Please note that the ARTS DR2 collection includes all data from the DR1 collection.

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:

form -- allows access via an HTML form
scs.xml -- a standard SCS interface as defined by the IVOA to access catalog-type data; SCS clients use https://vo.astron.nl/arts_dr2/q/det_cone/scs.xml? to access the service

This service is published as follows:

Within the set(s) local with the renderer form
Within the set(s) ivo_managed with the renderer scs.xml
Within the set(s) ivo_managed with the renderer tap

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):

Name	Table Head	Description	Unit	UCD
compound_beam	Compound Beam	N/A	N/A	N/A
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	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.

Name	Table Head	Description	Unit	UCD
_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.

Name	Table Head	Description	Unit	UCD	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) and Pastor-Marazuela et al. 2024 (2024arXiv240600482P). Additionally, you can cite the service reference. The ARTS data release is licensed under the Creative Commons Attribution 3.0 License

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

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