2021A&A...655A..56D

Query : 2021A&A...655A..56D

2021A&A...655A..56D - Astronomy and Astrophysics, volume 655A56-56 (2021/11-1)

Nonsequential neural network for simultaneous, consistent classification, and photometric redshifts of OTELO galaxies.

DE DIEGO J.A., NADOLNY J., BONGIOVANNI A., CEPA J., LARA-LOSPEZ M.A., GALLEGO J., CERVINO M., SANCHEZ-PORTAL M., GONZALEZ-SERRANO J.I., ALFARO E.J., POVIC M., PEREZ GARCIA A.M., PEREZ MARTINEZ R., PADILLA TORRES C.P., CEDRES B., GARCIA-AGUILAR D., GONZALEZ J.J., GONZALEZ-OTERO M., NAVARRO-MARTINEZ R. and PINTOS-CASTRO I.

Abstract (from CDS):


Context. Computational techniques are essential for mining large databases produced in modern surveys with value-added products.
Aims. This paper presents a machine learning procedure to carry out a galaxy morphological classification and photometric redshift estimates simultaneously. Currently, only a spectral energy distribution (SED) fitting has been used to obtain these results all at once.
Methods. We used the ancillary data gathered in the OTELO catalog and designed a nonsequential neural network that accepts optical and near-infrared photometry as input. The network transfers the results of the morphological classification task to the redshift fitting process to ensure consistency between both procedures.
Results. The results successfully recover the morphological classification and the redshifts of the test sample, reducing catastrophic redshift outliers produced by an SED fitting and avoiding possible discrepancies between independent classification and redshift estimates. Our technique may be adapted to include galaxy images to improve the classification.

Abstract Copyright: © ESO 2021

Journal keyword(s): Galaxy: general - methods: statistical

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 - 2026 		#notes
1 NAME SMM J141741.90+522823.6 Sy1 14 17 41.8801 +52 28 23.431   23.62 22.945 21.56 20.417 ~ 60 0

Query : 2021A&A...655A..56D

Basic data :
NAME SMM J141741.90+522823.6 -- Seyfert 1 Galaxy
Other object types: otypes_help 		G (2004ApJ,CFDF,...), X (CXO,CXOEGS,...), AGN (2011MNRAS,[RRB2009],...), IR (EGSIRAC,[ADH2006],...), smm (2004ApJ,CUDSS,...), Sy1 (2010A&A), Rad (15V), Opt (SDSS)
ICRS coord. (ep=J2000) : 		14 17 41.8801 +52 28 23.431 (Optical) [ ] C 2021A&A...647A..89N
FK4 coord. (ep=B1950 eq=1950) : 		14 15 57.2146 +52 42 12.055 [ ]
Gal coord. (ep=J2000) : 		096.3529057 +59.9741008 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 193009 [21] / z(spectroscopic) 1.14825 [0.00007] / cz 344236.7 [21.0]
   (Opt) C 2013ApJS..204...21M
Morphological type: 		E D 2010MNRAS.406..420G
Angular size (arcmin): 		0.0027 0.0027 0 (Opt) D 2007MNRAS.382..109T
Fluxes (12) :
B (AB) 23.62 [0.04] C 2013ApJS..204...21M
V 22.945 [0.011] D 2004MNRAS.350..785W
R (AB) 21.56 [0.01] C 2013ApJS..204...21M
I (AB) 20.417 [0.007] B 2013ApJS..204...21M
J (AB) 19.3989 [0.0009] B 2019A&A...631A...9B
H (AB) 18.6406 [0.0008] B 2019A&A...631A...9B
K (AB) 18.1044 [0.0005] B 2019A&A...631A...9B
u (AB) 24.6677 [0.009] B 2019A&A...631A...9B
g (AB) 24.0963 [0.0032] B 2019A&A...631A...9B
r (AB) 22.4759 [0.001] B 2019A&A...631A...9B
i (AB) 21.0427 [0.0005] B 2019A&A...631A...9B
z (AB) 20.4355 [0.0007] B 2019A&A...631A...9B
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Identifiers (35) :
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NAME SMM J141741.90+522823.6 DEEP-GSS 083-5273 [ADH2006] 14.13 [MSG2004] X-20
ACS-GC 12007954 EGSIRAC J141741.88+522823.4 [APR2004] 214.424483+52.473194 [NLA2005] c72
CFDF 14h 58899 NAME SMM J141741.81+522823.0 [BPG2011] irac167997 [RRB2009] 90
CFRS 14.1157 OTELO 5229 [CBS2005] SMM J141741.90+522823.6 [RRB2009] IRAC 028146
CUDSS 14.13 SDSS J141741.85+522823.6 [CBS2005] SMM J141741.81+522823.0 [SCB2004] SMM J141741.90+522823.6
CXO J141741.8+522823 15V 23 [FHD99] ISO 1 [TCB2007] 12007954
CXOEGS J141741.9+522824 XDEEP2 egs8-0058 [FHD99] ISO 0 [VV2010c] J141741.9+522823
CXOGWS J141741.9+522823 2XMM J141741.8+522823 [HSN2016] J214.42+52.47 [WEG2004] 14h 23
DEEP2-GRS 12007954 XMMGWS J141741.7+522822 [LNG2009] egs-0416

References (60 between 1850 and 2026) (Total 60)
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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Velocities : 7   

   

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

Data at NED - NASA/IPAC Extragalactic Database : NAME SMM J141741.90+522823.6

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CFRS 14.1157 SDSS J141741.85+522823.6

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