2022A&A...663A..69N


Query : 2022A&A...663A..69N

2022A&A...663A..69N - Astronomy and Astrophysics, volume 663A, 69-69 (2022/7-1)

ShapeNet: Shape constraint for galaxy image deconvolution.

NAMMOUR F., AKHAURY U., GIRARD J.N., LANUSSE F., SUREAU F., BEN ALI C. and STARCK J.-L.

Abstract (from CDS):

Deep learning (DL) has shown remarkable results in solving inverse problems in various domains. In particular, the Tikhonet approach is very powerful in deconvolving optical astronomical images. However, this approach only uses the l2 loss, which does not guarantee the preservation of physical information (e.g., flux and shape) of the object that is reconstructed in the image. A new loss function has been proposed in the framework of sparse deconvolution that better preserves the shape of galaxies and reduces the pixel error. In this paper, we extend the Tikhonet approach to take this shape constraint into account and apply our new DL method, called ShapeNet, to a simulated optical and radio-interferometry dataset. The originality of the paper relies on i) the shape constraint we use in the neural network framework, ii) the application of DL to radio-interferometry image deconvolution for the first time, and iii) the generation of a simulated radio dataset that we make available for the community. A range of examples illustrates the results.

Abstract Copyright: © F. Nammour et al. 2022

Journal keyword(s): miscellaneous - radio continuum: galaxies - techniques: image processing - methods: data analysis - methods: numerical

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME Cyg A Sy2 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2364 2

Query : 2022A&A...663A..69N

Basic data :
NAME Cyg A -- Seyfert 2 Galaxy
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
Sy1 (), Rad (2020A&A,BWE,...), X (3A,2E,...), AGN ([HB91],[VV2000c],...), G (2012A&A,LEDA,...), Sy2 (2007ApJS), QSO (2013ApJS,QSO), Bla ([IN88]), GiC ([OLM97]), GiG ([SS82]), IG (VV), * (KIC), gam (INTREF), NIR (2MASS), IR (IRAS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
19 59 28.35656837 +40 44 02.0972325 (Radio) [ 0.458059 0.4185 0 ] A 2020A&A...644A.159C
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
19 57 44.45368708 +40 35 46.3193819 [ 0.458059 0.4185 0 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
076.18988064623 +05.75538801499 [ 0.458059 0.4185 0 ]
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, ∼=unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) 16474 [150] / z(emission) 0.05654853 [0.0005] / cz 16952.8228 [150]
   (Opt) C 2022ApJS..261....2K
Syntax of morphological type is : mtype quality bibcode
  • mtype : Hubble morphological class (spirals, ellipticals, etc)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the morphological type reference
Morphological type:
E D ~
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin):
0.603 0.507 160 (NIR) C 2006AJ....131.1163S
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (5) :
B 16.22 [~] E ~
V 15.10 [~] D 2011MNRAS.414..500H
J 11.437 [0.058] C 2006AJ....131.1163S
H 10.611 [0.051] C 2006AJ....131.1163S
K 10.276 [0.062] C 2006AJ....131.1163S
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
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Some important notes on this object about identifications and objects associations.
notes:


Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (55) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME Cyg A IERS B1957+406 PBC J1959.4+4044 2XMM J195924.0+404418
3A 1958+407 INTREF 1004 QSO B1957+405 [DGW65] 129
BWE 1957+4035 IRAS 19577+4035 1RXS J195928.7+404405 [HB91] 1957+405
1C 19.01 KIC 5568067 SWIFT J1959.4+4044 [HR74] Ce
3C 405.0 LEDA 63932 TIC 172770364 [IN88] 1957+405
CTA 88 1M 1957+406 2U 1957+40 [KRL2007b] 371
CTB 81 2MASS J19592834+4044020 3U 1957+40 [OLM97] J195928.3+404402
DA 500 2MASX J19592833+4044022 4U 1957+40 [SS82] 1
DB 117 MCG+07-41-003 VLSS J1959.4+4044 [VV2000c] J195928.3+404402
2E 4309 Mills 19+4 VSOP J1959+4044 [VV2003c] J195928.3+404402
2E 1957.7+4035 NAME Cygnus A VSOP J1959+4043 [VV2006c] J195928.3+404402
1ES 1957+40.5 NRAO 620 VV 72 [VV2010c] J195928.3+404402
1H 1958+406 NVSS J195924+404419 WMAP J1959+4044 [VV98c] J195928.3+404402
ICRF J195928.3+404402 NVSS J195932+404347 W 57

References (2364 between 1850 and 2024) (Total 2364)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 11   

   

Observing logs


herschel : 14    ISO : 20   

   


External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NAME Cyg A

Link by name to the catalogue in VizieR :

BWE 1957+4035 3C 405.0 2E 4309 IERS B1957+406 IRAS 19577+4035
KIC 5568067 2MASS J19592834+4044020 2MASX J19592833+4044022 NVSS J195924+404419 NVSS J195932+404347
1RXS J195928.7+404405 VSOP J1959+4044 VSOP J1959+4043 WMAP J1959+4044

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