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Attention guided global enhancement and local refinement network for semantic segmentation

The encoder-decoder architecture is widely used as a lightweight semantic segmentation network. However, it struggles with a limited performance compared to a well-designed Dilated-FCN model for two major problems. First, commonly used…

Computer Vision and Pattern Recognition · Computer Science 2022-05-11 Jiangyun Li , Sen Zha , Chen Chen , Meng Ding , Tianxiang Zhang , Hong Yu

Euclid Quick Data Release (Q1). Active galactic nuclei identification using diffusion-based inpainting of Euclid VIS images

Light emission from galaxies exhibit diverse brightness profiles, influenced by factors such as galaxy type, structural features and interactions with other galaxies. Elliptical galaxies feature more uniform light distributions, while…

Astrophysics of Galaxies · Physics 2025-10-20 Euclid Collaboration , G. Stevens , S. Fotopoulou , M. N. Bremer , T. Matamoro Zatarain , K. Jahnke , B. Margalef-Bentabol , M. Huertas-Company , M. J. Smith , M. Walmsley , M. Salvato , M. Mezcua , A. Paulino-Afonso , M. Siudek , M. Talia , F. Ricci , W. Roster , N. Aghanim , B. Altieri , S. Andreon , H. Aussel , C. Baccigalupi , M. Baldi , S. Bardelli , P. Battaglia , A. Biviano , A. Bonchi , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , G. Cañas-Herrera , V. Capobianco , C. Carbone , J. Carretero , M. Castellano , G. Castignani , S. Cavuoti , K. C. Chambers , A. Cimatti , C. Colodro-Conde , G. Congedo , C. J. Conselice , L. Conversi , Y. Copin , A. Costille , F. Courbin , H. M. Courtois , M. Cropper , A. Da Silva , H. Degaudenzi , G. De Lucia , C. Dolding , H. Dole , M. Douspis , F. Dubath , X. Dupac , S. Dusini , S. Escoffier , M. Farina , S. Ferriol , K. George , C. Giocoli , B. R. Granett , A. Grazian , F. Grupp , S. V. H. Haugan , I. M. Hook , F. Hormuth , A. Hornstrup , P. Hudelot , M. Jhabvala , E. Keihänen , S. Kermiche , A. Kiessling , M. Kilbinger , B. Kubik , M. Kümmel , H. Kurki-Suonio , Q. Le Boulc'h , A. M. C. Le Brun , D. Le Mignant , P. B. Lilje , V. Lindholm , I. Lloro , G. Mainetti , D. Maino , E. Maiorano , O. Marggraf , M. Martinelli , N. Martinet , F. Marulli , R. Massey , S. Maurogordato , H. J. McCracken , E. Medinaceli , S. Mei , M. Melchior , M. Meneghetti , E. Merlin , G. Meylan , A. Mora , M. Moresco , L. Moscardini , R. Nakajima , C. Neissner , S. -M. Niemi , C. Padilla , S. Paltani , F. Pasian , K. Pedersen , W. J. Percival , V. Pettorino , G. Polenta , M. Poncet , L. A. Popa , L. Pozzetti , F. Raison , R. Rebolo , A. Renzi , J. Rhodes , G. Riccio , E. Romelli , M. Roncarelli , R. Saglia , A. G. Sánchez , D. Sapone , J. A. Schewtschenko , M. Schirmer , P. Schneider , T. Schrabback , A. Secroun , S. Serrano , P. Simon , C. Sirignano , G. Sirri , J. Skottfelt , L. Stanco , J. Steinwagner , P. Tallada-Crespí , A. N. Taylor , I. Tereno , S. Toft , R. Toledo-Moreo , F. Torradeflot , I. Tutusaus , L. Valenziano , J. Valiviita , T. Vassallo , G. Verdoes Kleijn , A. Veropalumbo , Y. Wang , J. Weller , A. Zacchei , G. Zamorani , F. M. Zerbi , I. A. Zinchenko , E. Zucca , V. Allevato , M. Ballardini , M. Bolzonella , E. Bozzo , C. Burigana , R. Cabanac , A. Cappi , J. A. Escartin Vigo , L. Gabarra , W. G. Hartley , J. Martín-Fleitas , S. Matthew , R. B. Metcalf , A. Pezzotta , M. Pöntinen , I. Risso , V. Scottez , M. Sereno , M. Tenti , M. Wiesmann , Y. Akrami , S. Alvi , I. T. Andika , S. Anselmi , M. Archidiacono , F. Atrio-Barandela , D. Bertacca , M. Bethermin , L. Bisigello , A. Blanchard , L. Blot , S. Borgani , M. L. Brown , S. Bruton , A. Calabro , F. Caro , T. Castro , F. Cogato , S. Davini , G. Desprez , A. Díaz-Sánchez , J. J. Diaz , S. Di Domizio , J. M. Diego , P. -A. Duc , A. Enia , Y. Fang , A. G. Ferrari , A. Finoguenov , A. Fontana , A. Franco , J. García-Bellido , T. Gasparetto , V. Gautard , E. Gaztanaga , F. Giacomini , F. Gianotti , M. Guidi , C. M. Gutierrez , A. Hall , S. Hemmati , H. Hildebrandt , J. Hjorth , J. J. E. Kajava , Y. Kang , V. Kansal , D. Karagiannis , C. C. Kirkpatrick , S. Kruk , L. Legrand , M. Lembo , F. Lepori , G. Leroy , J. Lesgourgues , L. Leuzzi , T. I. Liaudat , J. Macias-Perez , M. Magliocchetti , F. Mannucci , R. Maoli , C. J. A. P. Martins , L. Maurin , M. Miluzio , P. Monaco , G. Morgante , K. Naidoo , A. Navarro-Alsina , F. Passalacqua , K. Paterson , L. Patrizii , A. Pisani , D. Potter , S. Quai , M. Radovich , P. -F. Rocci , G. Rodighiero , S. Sacquegna , M. Sahlén , D. B. Sanders , E. Sarpa , A. Schneider , M. Schultheis , D. Sciotti , E. Sellentin , F. Shankar , L. C. Smith , K. Tanidis , G. Testera , R. Teyssier , S. Tosi , A. Troja , M. Tucci , C. Valieri , D. Vergani , G. Verza , N. A. Walton

Properties of AGN Multiband Optical Variability in the HSC SSP Transient Survey

We study variability of active galactic nuclei (AGNs) by using the deep optical multiband photometry data obtained from the Hyper Suprime-Cam Subaru Strategic Program (HSC SSP) survey in the COSMOS field. The images analyzed here were taken…

Astrophysics of Galaxies · Physics 2020-05-13 Yuki Kimura , Toru Yamada , Mitsuru Kokubo , Naoki Yasuda , Tomoki Morokuma , Tohru Nagao , Yoshiki Matsuoka

Exploring the Connection Between Star Formation and AGN Activity in the Local Universe

We study a combined sample of 264 star-forming, 51 composite, and 73 active galaxies using optical spectra from SDSS and mid-infrared (mid-IR) spectra from the Spitzer Infrared Spectrograph. We examine optical and mid-IR spectroscopic…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Stephanie M. LaMassa , T. M. Heckman , A. Ptak , D. Schiminovich , M. O'Dowd , B. Bertincourt

Euclid preparation. Spectroscopy of active galactic nuclei with NISP

The statistical distribution and evolution of key properties (e.g. accretion rate, mass, or spin) of active galactic nuclei (AGN), remain an open debate in astrophysics. The ESA Euclid space mission, launched on July 1st 2023, promises a…

Astrophysics of Galaxies · Physics 2024-01-17 Euclid Collaboration , E. Lusso , S. Fotopoulou , M. Selwood , V. Allevato , G. Calderone , C. Mancini , M. Mignoli , M. Scodeggio , L. Bisigello , A. Feltre , F. Ricci , F. La Franca , D. Vergani , L. Gabarra , V. Le Brun , E. Maiorano , E. Palazzi , M. Moresco , G. Zamorani , G. Cresci , K. Jahnke , A. Humphrey , H. Landt , F. Mannucci , A. Marconi , L. Pozzetti , P. Salucci , M. Salvato , F. Shankar , L. Spinoglio , D. Stern , S. Serjeant , N. Aghanim , B. Altieri , A. Amara , S. Andreon , T. Auphan , N. Auricchio , M. Baldi , S. Bardelli , R. Bender , D. Bonino , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , V. Capobianco , C. Carbone , J. Carretero , S. Casas , M. Castellano , S. Cavuoti , A. Cimatti , G. Congedo , C. J. Conselice , L. Conversi , Y. Copin , L. Corcione , F. Courbin , H. M. Courtois , J. Dinis , F. Dubath , C. A. J. Duncan , X. Dupac , S. Dusini , M. Farina , S. Farrens , S. Ferriol , N. Fourmanoit , M. Frailis , E. Franceschi , P. Franzetti , M. Fumana , S. Galeotta , B. Garilli , W. Gillard , B. Gillis , C. Giocoli , A. Grazian , F. Grupp , S. V. H. Haugan , W. Holmes , I. Hook , F. Hormuth , A. Hornstrup , M. Kümmel , E. Keihänen , S. Kermiche , B. Kubik , M. Kunz , H. Kurki-Suonio , S. Ligori , P. B. Lilje , V. Lindholm , I. Lloro , O. Mansutti , O. Marggraf , K. Markovic , N. Martinet , F. Marulli , R. Massey , E. Medinaceli , S. Mei , Y. Mellier , E. Merlin , G. Meylan , L. Moscardini , E. Munari , S. -M. Niemi , C. Padilla , S. Paltani , F. Pasian , K. Pedersen , W. J. Percival , V. Pettorino , G. Polenta , M. Poncet , L. A. Popa , F. Raison , R. Rebolo , A. Renzi , J. Rhodes , G. Riccio , E. Romelli , M. Roncarelli , E. Rossetti , R. Saglia , D. Sapone , B. Sartoris , P. Schneider , A. Secroun , G. Seidel , S. Serrano , C. Sirignano , G. Sirri , L. Stanco , C. Surace , P. Tallada-Crespí , A. N. Taylor , H. I. Teplitz , I. Tereno , R. Toledo-Moreo , F. Torradeflot , I. Tutusaus , E. A. Valentijn , L. Valenziano , T. Vassallo , A. Veropalumbo , D. Vibert , Y. Wang , J. Weller , J. Zoubian , E. Zucca , A. Biviano , M. Bolzonella , E. Bozzo , C. Burigana , C. Colodro-Conde , D. Di Ferdinando , J. Graciá-Carpio , G. Mainetti , N. Mauri , C. Neissner , Z. Sakr , V. Scottez , M. Tenti , M. Viel , M. Wiesmann , Y. Akrami , S. Anselmi , C. Baccigalupi , M. Ballardini , M. Bethermin , S. Borgani , A. S. Borlaff , S. Bruton , R. Cabanac , A. Calabro , A. Cappi , C. S. Carvalho , G. Castignani , T. Castro , G. Cañas-Herrera , K. C. Chambers , A. R. Cooray , J. Coupon , O. Cucciati , S. Davini , G. De Lucia , G. Desprez , S. Di Domizio , H. Dole , A. Díaz-Sánchez , J. A. Escartin Vigo , S. Escoffier , I. Ferrero , K. Ganga , J. García-Bellido , F. Giacomini , G. Gozaliasl , D. Guinet , A. Hall , H. Hildebrandt , A. Jiminez Muñoz , J. J. E. Kajava , V. Kansal , C. C. Kirkpatrick , L. Legrand , A. Loureiro , J. Macias-Perez , M. Magliocchetti , R. Maoli , M. Martinelli , C. J. A. P. Martins , S. Matthew , M. Maturi , L. Maurin , R. B. Metcalf , M. Migliaccio , P. Monaco , G. Morgante , S. Nadathur , L. Patrizii , A. Pezzotta , V. Popa , C. Porciani , D. Potter , M. Pöntinen , P. -F. Rocci , A. G. Sánchez , A. Schneider , E. Sefusatti , M. Sereno , A. Shulevski , P. Simon , A. Spurio Mancini , J. Stadel , S. A. Stanford , J. Steinwagner , G. Testera , R. Teyssier , S. Toft , S. Tosi , A. Troja , M. Tucci , C. Valieri , J. Valiviita , I. A. Zinchenko

Generative Adversarial Networks recover features in astrophysical images of galaxies beyond the deconvolution limit

Observations of astrophysical objects such as galaxies are limited by various sources of random and systematic noise from the sky background, the optical system of the telescope and the detector used to record the data. Conventional…

Instrumentation and Methods for Astrophysics · Physics 2017-04-19 Kevin Schawinski , Ce Zhang , Hantian Zhang , Lucas Fowler , Gokula Krishnan Santhanam

Properties and Expected Number Counts of Active Galactic Nuclei and their Hosts in the Far Infrared

Telescopes like Herschel and the Atacama Large Millimeter/submillimeter Array (ALMA) are creating new opportunities to study sources in the far infrared (FIR), a wavelength region dominated by cold dust emission. Probing cold dust in active…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Aden R. Draper , David R. Ballantyne

Towards a complete census of luminous Compton-thick Active Galactic Nuclei in the local Universe

X-ray surveys provide the most efficient means for the detection of Active Galactic Nuclei (AGN). However, they face difficulties in detecting the most heavily obscured Compton-thick AGN. The BAT detector on board the Gehrels/Swift mission,…

Astrophysics of Galaxies · Physics 2024-12-25 A. Akylas , I. Georgantopoulos , P. Gandhi , P. Boorman , C. L. Greenwell

Spatially Offset Active Galactic Nuclei I: Selection and Spectroscopic Properties

We present a sample of 18 optically-selected and X-ray detected spatially offset active galactic nuclei (AGN) from the Sloan Digital Sky Survey (SDSS). In 9 systems, the X-ray AGN is spatially offset from the galactic stellar core that is…

Astrophysics of Galaxies · Physics 2016-09-28 R. Scott Barrows , Julia M. Comerford , Jenny E. Greene , David Pooley

AGNIFS survey of local AGN: GMOS-IFU data and outflows in 30 sources

We analyse optical datacubes of the inner kiloparsec of 30 local ($z\le0.02$) active galactic nuclei (AGN) hosts that our research group, AGNIFS, has collected over the past decade via observations with the integral field units of the…

Astrophysics of Galaxies · Physics 2021-08-25 D. Ruschel-Dutra , T. Storchi-Bergmann , A. Schnorr-Müller , R. A. Riffel , B. Dall'Agnol de Oliveira , D. Lena , A. Robinson , N. Nagar , M. Elvis

A New Sample of Dwarf Galaxies with X-ray-Selected AGN Candidates from the eROSITA All-Sky Survey

To investigate the population of massive black holes in dwarf galaxies, we conduct a systematic search for active galactic nuclei (AGNs) using data from the first data release of the eROSITA All-Sky Survey (eRASS1). We crossmatch dwarf…

Astrophysics of Galaxies · Physics 2025-09-30 John-Michael Eberhard , Amy E. Reines

Two can play at that game: constraining the role of supernova and AGN feedback in dwarf galaxies with cosmological zoom-in simulations

There is growing observational evidence for dwarf galaxies hosting active galactic nuclei (AGN), including hints of AGN-driven outflows in dwarfs. However, in the common theoretical model of galaxy formation, efficient supernova (SN)…

Astrophysics of Galaxies · Physics 2022-09-02 Sophie Koudmani , Debora Sijacki , Matthew C. Smith

Selecting AGN through variability in SN datasets

Variability is a main property of active galactic nuclei (AGN) and it was adopted as a selection criterion using multi epoch surveys conducted for the detection of supernovae (SNe). We have used two SN datasets. First we selected the AXAF…

Astrophysics of Galaxies · Physics 2010-03-03 K. Boutsia , B. Leibundgut , D. Trevese , F. Vagnetti

X-ray absorption in INTEGRAL AGN: Host galaxy inclination

In this work the INTEGRAL hard X-ray selected sample of AGN has been used to investigate the possible contribution of absorbing material distributed within the host galaxies to the total amount of NH measured in the X-ray band. We collected…

High Energy Astrophysical Phenomena · Physics 2020-07-08 A. Malizia , L. Bassani , J. B. Stephen , A. Bazzano , P. Ubertini

Deconvolution of JWST/MIRI Images: Applications to an AGN Model and GATOS Observations of NGC 5728

The superb image quality, stability and sensitivity of the JWST permit deconvolution techniques to be pursued with a fidelity unavailable to ground-based observations. We present an assessment of several deconvolution approaches to improve…

Astrophysics of Galaxies · Physics 2024-02-15 M. T. Leist , C. Packham , D. J. V. Rosario , D. A. Hope , A. Alonso-Herrero , E. K. S. Hicks , S. Hönig , L. Zhang , R. Davies , T. Díaz-Santos , O. Ganzález-Martín , E. Bellocchi , P. G. Boorman , F. Combes , I. García-Bernete , S. García-Burillo , B. García-Lorenzo , H. Haidar , K. Ichikawa , M. Imanishi , S. M. Jefferies , Á. Labiano , N. A. Levenson , R. Nikutta , M. Pereira-Santaella , C. Ramos Almedia , C. Ricci , D. Rigopoulou , W. Schaefer , M. Stalevski , M. J. Ward , L. Fuller , T. Izumi , D. Rouan , T. Shimizu

The MOSDEF survey: AGN multi-wavelength identification, selection biases and host galaxy properties

We present results from the MOSFIRE Deep Evolution Field (MOSDEF) survey on the identification, selection biases, and host galaxy properties of 55 X-ray, IR and optically-selected active galactic nuclei (AGN) at $1.4 < z < 3.8$. We obtain…

Astrophysics of Galaxies · Physics 2017-01-25 Mojegan Azadi , Alison L. Coil , James Aird , Naveen Reddy , Alice Shapley , William R. Freeman , Mariska Kriek , Gene C. K. Leung , Bahram Mobasher , Sedona H. Price , Ryan L. Sanders , Irene Shivaei , Brian Siana

Detailed Shape and Evolutionary Behavior of the X-ray Luminosity Function of Active Galactic Nuclei

We construct the rest-frame 2--10 keV intrinsic X-ray luminosity function of Active Galactic Nuclei (AGNs) from a combination of X-ray surveys from the all-sky Swift BAT survey to the Chandra Deep Field-South. We use ~3200 AGNs in our…

Astrophysics of Galaxies · Physics 2015-05-20 T. Miyaji , G. Hasinger , M. Salvato , M. Brusa , N. Cappelluti , F. Civano , S. Puccetti , M. Elvis , H. Brunner , S. Fotopoulou , Y. Ueda , R. E. Griffiths , A. M. Koekemoer , M. Akiyama , A. Comastri , R. Gilli , G. Lanzuisi , A. Merloni , C. Vignali

XZ: Deriving redshifts from X-ray spectra of obscured AGN

Context: Redshifts are fundamental for our understanding of extragalactic X-ray sources. Ambiguous counterpart associations, expensive optical spectroscopy and/or multimission multiwavelength coverage to resolve degeneracies make estimation…

Instrumentation and Methods for Astrophysics · Physics 2018-10-17 Charlotte Simmonds , Johannes Buchner , Mara Salvato , Li-Ting Hsu , Franz Erik Bauer

Host Galaxies of z=4 Quasars

We have undertaken a project to investigate the host galaxies and environments of a sample of quasars at z~4. In this paper, we describe deep near-infrared imaging of 34 targets using the Magellan I and Gemini North telescopes. We discuss…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 K. K. McLeod , Jill Bechtold

The bulge-disk decomposition of AGN host galaxies

We present the results from a study of the morphologies of moderate luminosity X-ray selected AGN host galaxies in comparison to a carefully mass-matched control sample at 0.5 < z < 3 in the CANDELS GOODS-S field. We apply a…

Astrophysics of Galaxies · Physics 2016-03-16 V. A. Bruce , J. S. Dunlop , A. Mortlock , D. D. Kocevski , E. J. McGrath , D. J. Rosario