VII/299 HELP DR1 photometry of extragalactic field sources (Shirley+, 2021)
HELP the Herschel Extragalactic Legacy Project.
Shirley R., Duncan K., Campos-Varillas M.C., Hurley P.D., Malek K.,
Roehlly Y., Smith M.W.L., Aussel H., Bakx T., Buat V., Burgarella D.,
Christopher N., Duivenvoorden S., Eales S., Efstathiou A.,
Gonzalez Solares E.A., Griffin M., Jarvis M., Faro B.L., Marchetti L.,
McCheyne I., Papadopoulos A., Penner K., Pons E., Prescott M., Rigby E.,
Rottgering H., Saxena A., Scudder J., Vaccari M., Wang L. and Oliver S.J.
<Mon. Not. R. Astron. Soc. 507, 129-155 (2021)>
=2021MNRAS.507..129S 2021MNRAS.507..129S (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxies ; Combined data ; Photometry ; Spectroscopy ;
Cross identifications ; Redshifts ; Positional data ; Optical ;
Infrared ; Radio sources ; Millimetric/submm sources ;
Star Forming Region ; Stars, masses ; Magnitudes, absolute
Keywords: techniques: photometric - Astronomical databases: catalogues -
surveys - galaxies: evolution - infrared: galaxies -
submillimetre: galaxies
Abstract:
We present the Herschel Extragalactic Legacy Project (HELP). This
project collates, curates, homogenizes, and creates derived data
products for most of the premium multiwavelength extragalactic data
sets. The sky boundaries for the first data release cover 1270 deg2
defined by the Herschel SPIRE extragalactic survey fields; notably the
Herschel Multi-tiered Extragalactic Survey (HerMES) and the Herschel
Atlas survey (H-ATLAS). Here, we describe the motivation and principal
elements in the design of the project. Guiding principles are
transparent or 'open' methodologies with care for reproducibility and
identification of provenance. A key element of the design focuses
around the homogenization of calibration, meta data, and the provision
of information required to define the selection of the data for
statistical analysis. We apply probabilistic methods that extract
information directly from the images at long wavelengths, exploiting
the prior information available at shorter wavelengths and providing
full posterior distributions rather than maximum-likelihood estimates
and associated uncertainties as in traditional catalogues. With this
project definition paper, we provide full access to the first data
release of HELP; Data Release 1 (DR1), including a monolithic map of
the largest SPIRE extragalactic field at 385 deg2 and 18 million
measurements of PACS and SPIRE fluxes. We also provide tools to access
and analyse the full HELP data base. This new data set includes
far-infrared photometry, photometric redshifts, and derived physical
properties estimated from modelling the spectral energy distributions
over the full HELP sky. All the software and data presented is
publicly available.
Description:
The Herschel Extragalactic Legacy Project (HELP) brings together key
multiwavelength surveys. It homogenizes them; exploits prior
information from the optical, NIR, and mid-infrared surveys to deblend
the low-resolution long wavelength maps; provides well-calibrated
photometric redshifts ; and conducts energy-balanced spectral energy
distribution (SED) modelling to provide physical parameter
estimations.The first stage in this process is to compile all the
ancillary data that is available across the HELP fields into a
'masterlist' of objects. The principal aim is to produce a
catalogue with consistent photometry from the best photometric
catalogues that are available. The masterlist presented here is the
basis for the first public HELP data release (HELP DR1) and defines
the HELP identifiers and positions that will be used in subsequent
data products for DR1. Nowadays, we present the updated dm32 all-sky
catalog product fully described here
(https://github.com/H-E-L-P/dmu_products/tree/master/dmu32/
dmu32_AllSky and https://hedam.lam.fr/HELP/dataproducts/dmu32/
dmu32_AllSky/).
This allSky dm32 catalogue comprises 23 fields : AKARI-NEP and SEP,
Bootes, CDFS-SWIRE, COSMOS, EGS,ELAIS-N1, N2 and S1, GAMA-09, 12 and
15, HDF-N, Herschel-Stripe-82, Lockman-SWIRE, NGP, SA13, SGP,
SPIRE-NEP, SSDF, xFLS, XMM-13hr all presented with their own source
detections in section 2 and 3. The data includes stellarity values and
quality control flags as detailed in section 4. Also we provide
Photometric/Specroscopic estimates and collected redshifts, all flux
densities and uncertainties in respectives field photometric bands.
Finally, we computed SFR, M*, Ldust with CIGALE SED fitting code from
all merged sources observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
help.sam 1438 1000 Herschel Extragalactic Legacy Project HELP
photometric catalogue of extragalactic field
sources
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See also:
J/MNRAS/456/1359 : IAC Stripe 82 Legacy Project: Photometry (Fliri+, 2016)
J/MNRAS/416/927 : Wide-field optical imaging of 4 fields
(Gonzalez-Solares+, 2011)
J/MNRAS/413/971 : Galaxy And Mass Assembly (GAMA) DR1 (Driver+, 2011)
J/MNRAS/386/1605 : Luminous K-band selected QSOs from UKIDSS (Maddox+, 2008)
J/A+A/622/A103 : Python Code Investigating GALaxy Emission (Boquien+, 2019)
J/A+A/590/A102 : VIPERS Multi-Lambda Survey (Moutard+, 2016)
J/A+A/570/A11 : The Hawk-I UDS and GOODS Survey (HUGS) (Fontana+, 2014)
J/A+A/566/A60 : Optical-NIR catalog of AKARI NEP Deep Field (Oi+, 2014)
J/A+A/556/A55 : Multi-color photometry of star-forming galaxies
(Ilbert+, 2013)
J/ApJ/701/428 : The Spitzer Deep, Wide-Field Survey (SDWFS) (Ashby+, 2009)
J/ApJ/682/985 : FIREWORKS photometry of GOODS CDF-S (Wuyts+, 2008)
J/ApJS/235/36 : SPLASH-SXDF multi-wavelength photometric catalog
(Mehta+, 2018)
J/ApJS/231/7 : The VISTA-CFHT Stripe 82 NIR survey (VICS82) (Geach+, 2017)
J/ApJS/225/1 : SpIES: the Spitzer IRAC Equatorial Survey (Timlin+, 2016)
J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)
J/ApJS/223/1 : Multiwavelength catalog in the SEP field (Baronchelli+,2016)
J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)
J/ApJS/210/22 : Herschel Stripe 82 survey (HerS) first catalog (Viero+,2014)
J/ApJS/209/22 : SSDF survey: IRAC catalogs (Ashby+, 2013)
J/ApJS/208/24 : Spitzer MIR AGN survey. I. (Lacy+, 2013)
J/ApJS/193/13 : Spitzer/IRAC sources in the EGS I. SEDs (Barro+, 2011)
J/ApJS/187/251 : Ultradeep Ks imaging in the GOODS-N (Wang+, 2010)
J/ApJS/176/1 : Subaru/XMM-Newton deep survey (SXDS). II. (Furusawa+, 2008)
J/AJ/153/107 : Australian Dark Energy Survey (OzDES) quasar catalog
(Tie+, 2017)
J/AJ/128/1 : First Look Survey: NOAO R-band Mosaic (Fadda+, 2004)
VII/233 : 2MASS All-Sky Extended Source Catalog (XSC)
(IPAC-UMass, 2006)
III/334 : VISTA Deep Extragalactic Observations (VIDEO) (Jarvis+,2013)
II/377 : Spitzer Data Fusion main catalogue (Vaccari, 2023)
II/359 : The VISTA Hemisphere Survey (VHS) catalog DR4.1
(McMahon+, 2013)
II/357 : The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018)
II/350 : VLT Survey Telescope ATLAS (Shanks+, 2015)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+,2016)
II/329 : VIKING catalogue data release 1 (Edge+, 2013)
II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)
II/301 : The DEEP2-DR1 Photometric Catalog (Coil+ 2004)
II/261 : GOODS initial results (Giavalisco+, 2004)
II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2008)
Byte-by-byte Description of file: help.sam
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 28 A28 --- HELP HELP identifier based on J2000 position
as HELP_JHHMMSS.sss+DDMMSS.sss (help_id)
30- 45 F16.12 deg RAJ2000 Right Ascension (J2000) (ra)
47- 62 F16.12 deg DEJ2000 Declination (J2000) (dec)
64- 75 F12.9 mag hmag ? Total AB magnitude of the lowest
error h band measurement (mbesth)
77- 91 E15.9 uJy Fu ? Total flux density in the lowest
error u band measurement (fbestu)
93- 112 A20 --- r_stellar ? Name of Survey from which stellarity
is calculated (stellarity_origin)
114 I1 --- fOptNIRo [0/7] Flag indicating in which
wavelength regimes the source was
observed (flagoptnirobs)
116- 130 E15.9 mag e_ymag ? Uncertainty on mbesty (merrbesty)
132 I1 --- f_Fi2 [0]? Flag set to true for sources for
which niether the irac_i2 aperture nor
total flux should be used for SED
fitting (flagiraci2)
134- 145 F12.9 mag ymag ? Total AB magnitude of the lowest
error y band measurement (mbesty)
147- 157 F11.9 --- stellar ? Index evaluation is the source is
point-source as 0 not point source to 1
point source and generally name
stellarity index (stellarity)
159 I1 --- fClean [0/1] Boolean flag denoting that the
source was associated to really near
object that were removed during the
cleaning procedure (flag_cleaned)
161- 174 E14.9 Msun M* ? Stellar Mass estimated by SED fitting
with CIGALE (cigale_mstar)
176 I1 --- f_F350sp [0/1]? Flag set to true for sources for
which niether the spire_350 aperture
nor total flux should be used for SED
fitting (flagspire350)
178 I1 --- f_zsp [0/1] Boolean flag set to true when the
association of a source to its redshift
may be problematic possible
mis-cross-association
(zspecassociationflag)
180- 191 F12.9 mag gmag ? Total AB magnitude of the lowest
error g band measurement (mbestg)
193- 207 E15.9 mag e_i2mag ? Uncertainty on miraci2
(merriraci2)
209- 223 E15.9 uJy Fi3 ? Total flux density in the 5.6um band
of The Infrared Array Camera (IRAC) on
The Spitzer Space Telescope (firaci3)
225- 239 E15.9 uJy Fi2 ? Total flux density in the 4.5um band
of The Infrared Array Camera (IRAC) on
The Spitzer Space Telescope (firaci2)
241- 255 E15.9 mag e_rmag []? Uncertainty on mbestr
(merrbestr)
257 I1 --- f_Fz [0/1] Flag set to true for sources for
spurious measurements in z (flagbestz)
259 I1 --- f_Fi4 [0]? Flag set to true for sources for
which niether the irac_i4 aperture nor
total flux should be used for SED
fitting (flagiraci4)
261- 271 F11.9 --- zphEAZY ? Photometric redshift obtained with
EAZY (redshift)
273- 288 E16.9 uJy Fr ? Total flux density in the lowest
error r band measurement (fbestr)
290- 305 E16.9 uJy e_Fu ? Uncertainty on fbestu (ferrbestu)
307- 321 E15.9 uJy e_Fk ? Uncertainty on fbestk (ferrbestk)
323- 337 E15.9 mag e_gmag []? Uncertainty on mbestg
(merrbestg)
339- 351 E13.9 uJy e_Fpacsr ? Uncertainty on fpacsred
(ferrpacsred)
353- 367 E15.9 --- Chi2IR ? Reduced chi squared of best CIGALE
fit to infrared data
(cigalechi2ironly)
369- 382 E14.9 Msun e_M* ? Uncertainty on CIGALE_Mstar
(cigalemstarerr)
384- 392 F9.6 mag zmag ? Total AB magnitude of the lowest
error z band measurement (mbestz)
394 I1 --- f_Fy [0/1]? Flag set to true for sources for
spurious measurements in y (flagbesty)
396- 410 E15.9 uJy Fi4 ? Total flux density in the 8.0um band
of The Infrared Array Camera (IRAC) on
The Spitzer Space Telescope (firaci4)
412 I1 --- fMerg [0/1]? Boolean flag denoting a possible
mis-association during the
cross-matching of the various
catalogues (flag_merged)
414- 427 E14.9 uJy e_Fm24 ? Uncertainty on fmips24
(ferrmips24)
429 I1 --- q_zsp [0/5]? Spectroscopic redshift quality
flag FIXME code meaning (zspec_qual)
431- 444 E14.9 uJy e_F500sp ? Uncertainty on fspire500
(ferrspire500)
446- 460 E15.9 uJy Fj ? Total flux density in the lowest
error j band measurement (fbestj)
462 I1 --- f_Fi3 [0]? Flag set to true for sources for
which niether the irac_i3 aperture nor
total flux should be used for SED
fitting (flagiraci3)
464- 478 E15.9 mag e_umag ? Uncertainty on mbestu (merrbestu)
480- 494 F15.9 uJy e_Fj ? Uncertainty on fbestj (ferrbestj)
496- 510 E15.9 mag e_i1mag ? Uncertainty on miraci1
(merriraci1)
512- 525 E14.9 W e_LdustIR ? Uncertainty on
CIGALEDustLuminIRonly
(cigaledustluminironly_err)
527- 541 E15.9 uJy F350sp ? Total flux density in the 750-1500GHz
band of The Spectral and Photometric
Imaging Reciever (SPIRE) on The
Herschel Space Telescope (fspire350)
543- 557 E15.9 mag e_kmag ? Uncertainty on mbestk (merrbestk)
559- 576 A18 --- Field Name of the field in HELP survey as
detailed in appendix A in our study
(field)
578- 591 E14.9 uJy e_F250sp ? Uncertainty on fspire250
(ferrspire250)
593- 606 F14.9 uJy e_Fh ? Uncertainty on fbesth (ferrbesth)
608- 619 F12.9 mag rmag ? Total AB magnitude of the lowest
error g band measurement (mbestr)
621- 634 E14.9 Msun/yr SFR ? Star Formation Rate estimated by SED
fitting with CIGALE (cigale_sfr)
636 I1 --- f_Fks [0] Flag set to true for sources for
spurious measurements in ks
(flagbestks)
638- 649 F12.9 mag i1mag ? Total AB magnitude in the i1 band
3.6µm of the Infrared Array Camera
IRAC on the Spitzer Space Telescope
(miraci1)
651- 665 E15.9 mag e_i4mag ? Uncertainty on miraci4
(merriraci4)
667- 682 E16.9 uJy Fk ? Total flux density in the lowest
error k band measurement (fbestk)
684- 697 E14.9 --- Chi2Opt ? Reduced optical chi squared of best
CIGALE fit to all data (cigalechi2opt)
699 I1 --- f_F250sp [0/1]? Flag set to true for sources for
which niether the spire_250 aperture
nor total flux should be used for SED
fitting (flagspire250)
701- 715 E15.9 uJy e_Fi4 ? Uncertainty on firaci4
(ferriraci4)
717- 732 E16.9 uJy Fg ? Total flux density in the lowest
error g band measurement (fbestg)
734- 748 E15.9 mag e_zmag []? Uncertainty on mbestz
(merrbestz)
750- 762 E13.9 uJy Fpacsg ? Total flux density in the 100um green
band of Photoconductor Array Camera and
Spectrometer PACS on The Herschel Space
Telescope (fpacsgreen)
764- 775 F12.9 mag i3mag ? Total AB magnitude in the 5.6 µm
band of The Infrared Array Camera IRAC
on The Spitzer Space Telescope
(miraci3)
777- 791 E15.9 uJy Fks ? Total flux density in the lowest
error ks band measurement (fbestks)
793- 808 E16.9 uJy Fi ? Total flux density in the lowest
error i band measurement (fbesti)
810 I1 --- f_Fu [0] Flag set to true for sources for
spurious measurements in u (flagbestu)
812 I1 --- f_Fh [0] Flag set to true for sources for
spurious measurements in h (flagbesth)
814- 828 E15.9 uJy Fh ? Total flux density in the lowest
error h band measurement (fbesth)
830- 843 E14.9 --- Chi2best ? Reduced chi squared of best CIGALE
fit (cigalechi2red)
845- 860 E16.9 uJy e_Fg ? Uncertainty on fbestg (ferrbestg)
862- 874 F13.9 mag kmag ? Total AB magnitude of the lowest
error k band measurement (mbestk)
876 I1 --- f_Fpacsg [0/1]? Flag set to true for sources for
which niether the pacs_green aperture
nor total flux should be used for SED
fitting (see documentation)
(flagpacsgreen)
878 I1 --- f_F500sp [0/1]? Flag set to true for sources for
which niether the spire_500 aperture
nor total flux should be used for SED
fitting (see documentation)
(flagspire500)
880- 894 E15.9 mag e_ksmag ? Uncertainty on mbestks
(merrbestks)
896 I1 --- f_Fg [0/1] Flag set to true for sources for
spurious measurements in g (flagbestg)
898- 911 E14.9 uJy e_Fi2 ? Uncertainty on firaci2
(ferriraci2)
913- 927 E15.9 mag e_jmag ? Uncertainty on mbestj (merrbestj)
929- 942 E14.9 W Ldust ? Dust luminosity estimated by SED
fitting with CIGALE using both optical
and infra-red information
(cigale_dustlumin)
944- 957 E14.9 W e_Ldust ? Uncertainty on CIGALE_DustLumin
(cigaledustluminerr)
959- 973 E15.9 uJy e_Fks ? Uncertainty on fbestks
(ferrbestks)
975- 983 I9 --- HEALPIX HEALPix index of the source position at
order 13 using the nested scheme
(hp_idx)
985 I1 --- f_Fr [0/1] Flag set to true for sources for
spurious measurements in r (flagbestr)
987- 999 E13.9 uJy e_Fpacsg ? Uncertainty on fpacsgreen
(ferrpacsgreen)
1001-1015 E15.9 --- zsp ? Spectroscopic redshift collated from
the literature (zspec)
1017-1028 F12.9 mag ksmag ? Total AB magnitude of the lowest
error ks band measurement (mbestks)
1030-1044 E15.9 uJy F500sp ? Total flux density in the 400-750GHz
band of The Spectral and Photometric
Imaging Reciever SPIRE on The Herschel
Space Telescope (fspire500)
1046-1061 E16.9 uJy e_Fi ? Uncertainty on fbesti (ferrbesti)
1063-1077 E15.9 uJy e_Fi3 ? Uncertainty on firaci3
(ferriraci3)
1079-1092 E14.9 uJy e_Fy ? Uncertainty on fbesty (ferrbesty)
1094-1108 E15.9 mag e_imag ? Uncertainty on mbesti (merrbesti)
1110-1125 E16.9 uJy Fy ? Total flux density in the lowest
error y band measurement (fbesty)
1127-1142 E16.9 uJy Fz ? Total flux density in the lowest
error z band measurement (fbestz)
1144 I1 --- fOptNIRd [0/7] Flag indicating in which
wavelength regimes the source was
detected (flagoptnirdet)
1146-1159 E14.9 --- Chi2IRbest ? Reduced infrared chi squared of best
CIGALE fit to all data (cigalechi2ir)
1161 I1 --- f_Fpacsr [0/1]? Flag set to true for sources for
which niether the pacs_red aperture nor
total flux should be used for SED
fitting (flagpacsred)
1163 I1 --- f_Fk [0/1]? Flag set to true for sources for
spurious measurements in k (flagbestk)
1165-1176 F12.9 mag jmag ? Total AB magnitude of the lowest
error j band measurement (mbestj)
1178-1192 E15.9 uJy F250sp ? Total flux density in the 750-1500GHz
band of The Spectral and Photometric
Imaging Reciever SPIRE on The Herschel
Space Telescope (fspire250)
1194-1208 E15.9 mag e_hmag ? Uncertainty on mbesth (merrbesth)
1210-1224 E15.9 uJy e_Fr ? Uncertainty on fbestr (ferrbestr)
1226 I1 --- f_Fi1 [0/1]? Flag set to true for sources for
which niether the irac_i1 aperture nor
total flux should be used for SED
fitting (flagiraci1)
1228 I1 --- f_Fj [0/1]? Flag set to true for sources for
spurious measurements in j (flagbestj)
1230-1241 F12.9 mag i4mag ? Total AB magnitude in the 8.0 um band
of The Infrared Array Camera (IRAC) on
The Spitzer Space Telescope (miraci4)
1243-1258 E16.9 uJy e_Fz ? Uncertainty on fbestz (ferrbestz)
1260-1272 F13.9 mag imag ? Total AB magnitude of the lowest
error i band measurement (mbesti)
1274-1284 F11.9 mag E(B-V) Galactic extinction (Schlegel et al.
1998ApJ...500..525S 1998ApJ...500..525S) at the object
position (ebv)
1286 I1 --- f_Fm24 [0/1]? Flag set to true for sources for
which niether the mips_24 aperture nor
total flux should be used for SED
fitting (flagmips24)
1288-1301 E14.9 uJy e_F350sp ? Uncertainty on fspire350
(ferrspire350)
1303 I1 --- fGaia [0/3] Flag indicating the increasing
probability of the source being a Gaia
object (flag_gaia)
1305-1317 E13.9 uJy Fpacsr ? Total flux density in the 160um red
band of Photoconductor Array Camera and
Spectrometer PACS on The Herschel Space
Telescope (fpacsred)
1319-1332 E14.9 Msun/yr e_SFR ? Uncertainty on CIGALE_SFR
(cigalesfrerr)
1334-1347 E14.9 uJy e_Fi1 ? Uncertainty on firaci1
(ferriraci1)
1349-1363 E15.9 uJy Fi1 ? Total flux density in the 3.6um band
of The Infrared Array Camera IRAC on
The Spitzer Space Telescope (firaci1)
1365-1379 E15.9 mag e_i3mag ? Uncertainty on miraci3
(merriraci3)
1381 I1 --- f_Fi [0/1] Flag set to true for sources for
spurious measurements in i (flagbesti)
1383-1394 F12.9 mag i2mag ? Total AB magnitude in i2 band 4.5µm
of The Infrared Array Camera IRAC on
The Spitzer Space Telescope (miraci2)
1396-1407 F12.9 mag umag ? Total AB magnitude of the lowest
error u band measurement (mbestu)
1409-1423 E15.9 uJy Fm24 ? Total flux density in the 15-30um
band of The Multiband Imaging
Photometer MIPS on The Spitzer Space
Telescope (fmips24)
1425-1438 E14.9 W LdustIR ? Dust luminosity estimated by SED
fitting with CIGALE using only the
infra-red information
(cigaledustluminironly)
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Acknowledgements:
Shirley R., rshirley(at)mpe.mpg.de
History:
From electronic version of the journal
License: CC-BY-4.0
(End) Luc Trabelsi [CDS] 22-Apr-2026