Information on Service 'HerMES SCAT250 (blind SPIRE 250µm extraction)'

Further access options are discussed below

SPIRE catalogues from the Herschel Extragalactic Legacy Project.

For a list of all services and tables belonging to this service's resource, see Information on resource 'HELP SPIRE catalogues'

Service Documentation

The Herschel Extragalactic Legacy Project (HELP) intends to produce a multi-wavelength, comprehensive data set of the galaxy population at high redshift. The Herschel Space Observatory has the unique property of being able to probe the presence of star formation in extremely dusty galaxies through observations of the far infra-red and sub-millimetre portion of the electromagnetic spectrum. However, Herschel has relatively poor spatial resolution, making it difficult to disentangle which galaxies are responsible for what amount of flux.

HELP aims to robustly address this issue with the use of as many complimentary data sets as possible. With the inclusion of data at shorter wavelengths (such as the optical, radio and near-infra-red), which have much higher spatial resolution, the deblending of Herschel flux into component parts can be undertaken in a much more robust, informed manner. The ultimate goal of HELP is to produce a multi-wavelength data set, which will be easy to use so that astronomers not currently used to working with Herschel data or high redshift surveys could make use of the statistical samples found within the HELP catalogue.

These are the Herschel SPIRE catalogues from HELP.

Overview

You can access this service using:

static -- static (i.e. prepared) data or custom client-side code; probably used to access ancillary files here
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://herschel-vos.phys.sussex.ac.uk/spire_blind/q/cone_scat250/scs.xml? to access the service

This service is published as follows:

Within the set(s) ivo_managed,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
DEC	Delta (ICRS)	Declination (ICRS decimal)	deg	pos.eq.dec
F_SPIRE250	F_SPIRE250	Flux density at 250 micron	mJy	phot.flux;em.mm.750-1500GHz;meta.main
Field	Field	Name of the field in the HerMES survey	N/A	meta.id;obs.field
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
IAU_name	IAU name	IAU name of the source	N/A	meta.id;meta.main
MAXREC	Match limit	Maximum number of records returned. Pass 0 to retrieve service parameters.	N/A	N/A
MAXREC	Match limit	Maximum number of records returned. Pass 0 to retrieve service parameters.	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
RESPONSEFORMAT	Output Format	File format requested for output.	N/A	meta.code.mime
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
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
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
Dec	Dec	Declination	deg	pos.eq.dec;meta.main
F_SPIRE250	F_SPIRE250	Flux density at 250 micron	mJy	phot.flux;em.mm.750-1500GHz;meta.main
FErr_SPIRE250	FErr_SPIRE250	Error (inst.) in flux density at 250 micron	mJy	stat.error;phot.flux;em.mm.750-1500GHz
FErrTot_SPIRE250	FErrTot_SPIRE250	Total error (inst.+conf.) in flux density at 250 micron	mJy	stat.error;phot.flux;em.mm.750-1500GHz
Flag	Flag	Flag giving additional information on the source Note scatflag	N/A	meta.code
gID	gID	ID of the segment where the source is	N/A	meta.id
IAU_name	IAU name	IAU name of the source	N/A	meta.id;meta.main
RA	RA	Right Ascension	deg	pos.eq.ra;meta.main

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
IAU_name	IAU name	IAU name of the source	N/A	meta.id;meta.main	20
RA	RA	Right Ascension	deg	pos.eq.ra;meta.main	20
Dec	Dec	Declination	deg	pos.eq.dec;meta.main	20
F_SPIRE250	F_SPIRE250	Flux density at 250 micron	mJy	phot.flux;em.mm.750-1500GHz;meta.main	20
FErr_SPIRE250	FErr_SPIRE250	Error (inst.) in flux density at 250 micron	mJy	stat.error;phot.flux;em.mm.750-1500GHz	20
FErrTot_SPIRE250	FErrTot_SPIRE250	Total error (inst.+conf.) in flux density at 250 micron	mJy	stat.error;phot.flux;em.mm.750-1500GHz	20
gID	gID	ID of the segment where the source is	N/A	meta.id	20
Flag	Flag	Flag giving additional information on the source Note scatflag	N/A	meta.code	20
Field	Field	Name of the field in the HerMES survey	N/A	meta.id;obs.field	30
Chi250	Chi250	Local reduced chi2 statistic of photometry fit in 11x11 pixel window	N/A	stat.fit.chi2	30
gSize	gSize	Number of sources in the segment gID	N/A	meta.number	30
Bkg250	Bkg250	Background substracted from 250 micron map	N/A	instr.background;em.mm.750-1500GHz;	30

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

Note scatflag: The source extracted from the deepest part of the CDFS-SWIRE map are flagged with "goods-s".

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