Related papers: Finding active galactic nuclei through Fink

Identifying Doppelganger Active Galactic Nuclei across redshifts from spectroscopic surveys

Active Galactic Nuclei (AGNs) are among the most luminous objects in the universe, making them valuable probes for studying galaxy evolution. However, understanding how AGN properties evolve over cosmic time remains a fundamental challenge.…

Astrophysics of Galaxies · Physics 2025-05-06 Shreya Sareen , Swayamtrupta Panda

Active Galactic Nuclei in the Sloan Digital Sky Survey: I. Sample Selection

We have compiled a large sample of low-redshift active galactic nuclei (AGN) identified via their emission line characteristics from the spectroscopic data of the Sloan Digital Sky Survey. Since emission lines are often contaminated by…

Astrophysics · Physics 2016-08-16 Lei Hao , Michael A. Strauss , Christy A. Tremonti , David J. Schlegel , Timothy M. Heckman , Guinevere Kauffmann , Michael R. Blanton , Xiaohui Fan , James E. Gunn , Patrick B. Hall , Željko Ivezić , Gillian R. Knapp , Julian H. Krolik , Robert H. Lupton , Gordon T. Richards , Donald P. Schneider , Iskra V. Strateva , Nadia L. Zakamska , J. Brinkmann , Robert J. Brunner , Gyula P. Szokoly

QSFit: Automatic analysis of optical AGN spectra

We present QSFit, a new software package to automatically perform the analysis of Active Galactic Nuclei (AGN) optical spectra. The software provides luminosity estimates for the AGN continuum, the Balmer continuum, both optical and UV iron…

High Energy Astrophysical Phenomena · Physics 2017-09-12 G. Calderone , L. Nicastro , G. Ghisellini , M. Dotti , T. Sbarrato , F. Shankar , M. Colpi

Active Galactic Nuclei and their Large-scale Structure: an eROSITA mock catalogue

In the context of the upcoming SRG/eROSITA survey, we present an N-body simulation-based mock catalogue for X-ray selected AGN samples. The model reproduces the observed hard X-ray AGN luminosity function (XLF) and the soft X-ray logN-logS…

Astrophysics of Galaxies · Physics 2019-06-07 J. Comparat , A. Merloni , M. Salvato , K. Nandra , T. Boller , A. Georgakakis , A. Finoguenov , T. Dwelly , J. Buchner , A. Del Moro , N. Clerc , Y. Wang , G. Zhao , F. Prada , G. Yepes , M. Brusa , M. Krumpe , T. Liu

Testing Diagnostics of Nuclear Activity and Star Formation in Galaxies at z>1

We present some of the first science data with the new Keck/MOSFIRE instrument to test the effectiveness of different AGN/SF diagnostics at z~1.5. MOSFIRE spectra were obtained in three H-band multi-slit masks in the GOODS-S field,…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Jonathan R. Trump , Nicholas P. Konidaris , Guillermo Barro , David C. Koo , Dale D. Kocevski , Stephanie Juneau , Benjamin J. Weiner , S. M. Faber , Ian S. McLean , Renbin Yan , Pablo G. Perez-Gonzalez , Victor Villar

The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

We present the first catalog of active galactic nuclei (AGN) detected by the LAT, corresponding to 11 months of data collected in scientific operation mode. The First LAT AGN Catalog (1LAC) includes 671 gamma-ray sources located at high…

High Energy Astrophysical Phenomena · Physics 2019-08-14 A. A. Abdo

The Tiny Time-series Transformer: Low-latency High-throughput Classification of Astronomical Transients using Deep Model Compression

A new golden age in astronomy is upon us, dominated by data. Large astronomical surveys are broadcasting unprecedented rates of information, demanding machine learning as a critical component in modern scientific pipelines to handle the…

Instrumentation and Methods for Astrophysics · Physics 2023-03-17 Tarek Allam , Julien Peloton , Jason D. McEwen

Euclid Quick Data Release (Q1). First Euclid statistical study of the active galactic nuclei contribution fraction

Active galactic nuclei (AGN) play a key role in galaxy evolution but are challenging to identify due to their varied observational signatures. Furthermore, understanding their impact requires quantifying their strength relative to their…

Astrophysics of Galaxies · Physics 2025-03-20 Euclid Collaboration , B. Margalef-Bentabol , L. Wang , A. La Marca , V. Rodriguez-Gomez , A. Humphrey , S. Fotopoulou , F. Ricci , Y. Toba , G. Stevens , M. Mezcua , W. Roster , J. H. Knapen , M. Salvato , M. Siudek , F. Shankar , T. Matamoro Zatarain , L. Spinoglio , P. Dayal , J. Petley , R. Kondapally , N. Aghanim , B. Altieri , A. Amara , S. Andreon , N. Auricchio , H. Aussel , C. Baccigalupi , M. Baldi , A. Balestra , S. Bardelli , P. Battaglia , A. Biviano , A. Bonchi , D. Bonino , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , G. Cañas-Herrera , V. Capobianco , C. Carbone , J. Carretero , S. Casas , 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 , A. M. Di Giorgio , C. Dolding , H. Dole , F. Dubath , C. A. J. Duncan , X. Dupac , A. Ealet , S. Escoffier , M. Farina , R. Farinelli , F. Faustini , S. Ferriol , F. Finelli , M. Frailis , E. Franceschi , S. Galeotta , K. George , B. Gillis , C. Giocoli , P. Gómez-Alvarez , J. Gracia-Carpio , B. R. Granett , A. Grazian , F. Grupp , L. Guzzo , S. Gwyn , S. V. H. Haugan , W. Holmes , I. M. Hook , F. Hormuth , A. Hornstrup , P. Hudelot , K. Jahnke , M. Jhabvala , E. Keihänen , S. Kermiche , A. Kiessling , B. Kubik , M. Kümmel , M. Kunz , H. Kurki-Suonio , Q. Le Boulc'h , A. M. C. Le Brun , D. Le Mignant , P. Liebing , S. Ligori , P. B. Lilje , V. Lindholm , I. Lloro , G. Mainetti , D. Maino , E. Maiorano , O. Mansutti , S. Marcin , O. Marggraf , M. Martinelli , N. Martinet , F. Marulli , R. Massey , S. Maurogordato , E. Medinaceli , S. Mei , M. Melchior , Y. Mellier , M. Meneghetti , E. Merlin , G. Meylan , A. Mora , M. Moresco , L. Moscardini , R. Nakajima , C. Neissner , S. -M. Niemi , J. W. Nightingale , C. Padilla , S. Paltani , F. Pasian , K. Pedersen , W. J. Percival , V. Pettorino , S. Pires , G. Polenta , M. Poncet , L. A. Popa , L. Pozzetti , F. Raison , R. Rebolo , A. Renzi , J. Rhodes , G. Riccio , E. Romelli , M. Roncarelli , H. J. A. Rottgering , B. Rusholme , R. Saglia , Z. Sakr , D. Sapone , B. Sartoris , J. A. Schewtschenko , P. Schneider , T. Schrabback , A. Secroun , G. Seidel , M. Seiffert , S. Serrano , P. Simon , C. Sirignano , G. Sirri , 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 , D. Di Ferdinando , J. A. Escartin Vigo , L. Gabarra , M. Huertas-Company , J. Martín-Fleitas , S. Matthew , N. Mauri , R. B. Metcalf , A. Pezzotta , M. Pöntinen , C. Porciani , I. Risso , V. Scottez , M. Sereno , M. Tenti , M. Viel , M. Wiesmann , Y. Akrami , I. T. Andika , S. Anselmi , M. Archidiacono , F. Atrio-Barandela , C. Benoist , K. Benson , D. Bertacca , M. Bethermin , L. Bisigello , A. Blanchard , L. Blot , H. Böhringer , S. Borgani , M. L. Brown , S. Bruton , A. Calabro , B. Camacho Quevedo , F. Caro , C. S. Carvalho , T. Castro , F. Cogato , A. R. Cooray , O. Cucciati , S. Davini , F. De Paolis , G. Desprez , A. Díaz-Sánchez , J. J. Diaz , S. Di Domizio , J. M. Diego , P. -A. Duc , A. Enia , Y. Fang , A. G. Ferrari , P. G. Ferreira , A. Finoguenov , A. Fontana , A. Franco , K. Ganga , J. García-Bellido , T. Gasparetto , V. Gautard , R. Gavazzi , E. Gaztanaga , F. Giacomini , F. Gianotti , G. Gozaliasl , M. Guidi , C. M. Gutierrez , A. Hall , W. G. Hartley , S. Hemmati , C. Hernández-Monteagudo , H. Hildebrandt , J. Hjorth , J. J. E. Kajava , Y. Kang , V. Kansal , D. Karagiannis , K. Kiiveri , C. C. Kirkpatrick , S. Kruk , J. Le Graet , L. Legrand , M. Lembo , F. Lepori , G. Leroy , G. F. Lesci , J. Lesgourgues , L. Leuzzi , T. I. Liaudat , S. J. Liu , A. Loureiro , J. Macias-Perez , G. Maggio , M. Magliocchetti , F. Mannucci , R. Maoli , C. J. A. P. Martins , L. Maurin , M. Miluzio , P. Monaco , C. Moretti , G. Morgante , C. Murray , K. Naidoo , A. Navarro-Alsina , S. Nesseris , 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 , C. Scarlata , A. Schneider , D. Sciotti , E. Sellentin , L. C. Smith , K. Tanidis , G. Testera , R. Teyssier , S. Tosi , A. Troja , M. Tucci , C. Valieri , A. Venhola , D. Vergani , G. Verza , P. Vielzeuf , N. A. Walton , D. Scott

A Machine Learning Framework for Stellar Collision Transient Identification

Modern astronomical surveys, such as the Zwicky Transient Facility (ZTF), are capable of detecting thousands of transient events per year, necessitating the use of automated and scalable data analysis techniques. Recent advances in machine…

Instrumentation and Methods for Astrophysics · Physics 2025-04-17 Betty X. Hu , Avi Loeb

A forward modelling approach to AGN variability -- Method description and early applications

We present a numerical framework for the variability of active galactic nuclei (AGN), which links the variability of AGN over a broad range of timescales and luminosities to the observed properties of the AGN population as a whole, and…

Astrophysics of Galaxies · Physics 2019-10-09 Lia F. Sartori , Benny Trakhtenbrot , Kevin Schawinski , Neven Caplar , Ezequiel Treister , Ce Zhang

The Lumina Project: The Demographics of Active Galactic Nuclei from Quasars to Little Red Dots at $z\geq 3$

High-redshift active galactic nuclei (AGN) serve as powerful probes of early black-hole growth, galaxy formation, and the evolving intergalactic medium (IGM). In this work, we use Lumina, a cosmological radiation-hydrodynamic simulation…

Astrophysics of Galaxies · Physics 2026-05-26 Xuejian Shen , Oliver Zier , Aaron Smith , Rongrong Liu , Rahul Kannan , Teodora-Elena Bulichi , Sonja M. Koehler , Volker Springel , Mark Vogelsberger , Lars Hernquist , Rohan P. Naidu , Anna de Graaff , Elia Pizzati , David M. Alexander , Luis C. Ho , Vasily Kokorev , Gene Leung , Anna-Christina Eilers , Ryan C. Hickox

Demonstration of KVN phase referencing capability

We present the results of Very Long Baseline Interferometry (VLBI) observations using the phase reference technique to detect weak Active Galactic Nuclei (AGN) cores in the Virgo cluster. Our observations were carried out using the Korean…

Astrophysics of Galaxies · Physics 2015-11-12 Evangelia Tremou , Taehyun Jung , Aeree Chung , Bong Won Sohn

AGILE: an end-to-end Rubin-LSST simulation of AGNs, galaxies, and stars I. Software description and first data release

Contemporary large-scale surveys such as the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) and Euclid present an unprecedented discovery potential for studying AGNs at the population level in the big data era. However,…

Astrophysics of Galaxies · Physics 2026-03-18 A. Viitanen , A. Bongiorno , I. Saccheo , A. Grazian , M. Paolillo , V. Petrecca , D. De Cicco , D. Roberts , F. Shankar , V. Allevato , E. Merlin , D. Ilić , A. B. Kovačević G. De Somma , M. Di Criscienzo , L. Girardi , M. Marconi , A. Mazzi , G. Pastorelli , M. Trabucchi , T. Ananna , R. J. Assef , W. N. Brandt , M. Brescia , A. W. Graham , G. Li , D. Marsango , A. Peca , M. Polioudakis , C. M. Raiteri , B. Rani , C. Ricci , G. Richards , M. Salvato , S. Satheesh-Sheeba , R. Shirley , S. Tang , M. J. Temple , F. Tombesi , I. Yoon , F. Zou

A mid-infrared exploration of the dusty environments of active galactic nuclei

We present the first results from a mid-infrared survey of local Active Galactic Nuclei (AGN) using the CanariCam (CC) instrument on the 10.4m Gran Telescopio Canarias (GTC). We are obtaining sub-arcsecond angular resolution (0.3-0.6…

High Energy Astrophysical Phenomena · Physics 2015-06-18 Almudena Alonso-Herrero

Machine Learning for the Zwicky Transient Facility

The Zwicky Transient Facility is a large optical survey in multiple filters producing hundreds of thousands of transient alerts per night. We describe here various machine learning (ML) implementations and plans to make the maximal use of…

Instrumentation and Methods for Astrophysics · Physics 2019-02-07 Ashish Mahabal , Umaa Rebbapragada , Richard Walters , Frank J. Masci , Nadejda Blagorodnova , Jan van Roestel , Quan-Zhi Ye , Rahul Biswas , Kevin Burdge , Chan-Kao Chang , Dmitry A. Duev , V. Zach Golkhou , Adam A. Miller , Jakob Nordin , Charlotte Ward , Scott Adams , Eric C. Bellm , Doug Branton , Brian Bue , Chris Cannella , Andrew Connolly , Richard Dekany , Ulrich Feindt , Tiara Hung , Lucy Fortson , Sara Frederick , C. Fremling , Suvi Gezari , Matthew Graham , Steven Groom , Mansi M. Kasliwal , Shrinivas Kulkarni , Thomas Kupfer , Hsing Wen Lin , Chris Lintott , Ragnhild Lunnan , John Parejko , Thomas A. Prince , Reed Riddle , Ben Rusholme , Nicholas Saunders , Nima Sedaghat , David L. Shupe , Leo P. Singer , Maayane T. Soumagnac , Paula Szkody , Yutaro Tachibana , Kushal Tirumala , Sjoert van Velzen , Darryl Wright

Active Galactic Nuclei in Groups and Clusters of Galaxies: Detection and Host Morphology

The incidence and properties of Active Galactic Nuclei (AGN) in the field, groups, and clusters can provide new information about how these objects are triggered and fueled, similar to how these environments have been employed to study…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Timothy J. Arnold , Paul Martini , John S. Mulchaey , Angela Berti , Tesla E. Jeltema

Properties of new X-ray selected AGN

We present the results of a program to identify so far unknown active nuclei (AGN) in galaxies. Candidate galactic nuclei have been selected for optical spectroscopy from a cross-correlation of the ROSAT all sky survey (RASS) bright source…

Astrophysics · Physics 2007-05-23 K. Bischoff , W. Pietsch , T. Boller , S. Döbereiner , W. Kollatschny , H. -U. Zimmermann

The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years of scientific operation is presented. The Second LAT AGN Catalog (2LAC) includes 1017 gamma-ray sources located at high…

High Energy Astrophysical Phenomena · Physics 2015-05-30 LAT Collaboration

Anomaly detection in Fink. I. Discovery, follow-up, and classification of unusual sources

Modern wide-field time-domain surveys produce alert streams whose scientific potential is often concentrated in rare and unusual events. Efficient discovery therefore requires automated pipelines to be combined with rapid expert validation…

High Energy Astrophysical Phenomena · Physics 2026-04-01 M. V. Pruzhinskaya , M. V. Kornilov , A. V. Dodin , A. Baluta , T. A. Pshenichniy , A. M. Zubareva , E. E. O. Ishida , J. Peloton , I. Beschastnov , I. Ippolitov , A. A. Belinski , P. Golysheva , N. P. Ikonnikova , V. A. Kiryukhina , V. V. Krushinsky , A. M. Tatarnikov , S. G. Zheltoukhov , D. A. Buckley , A. Kniazev , S. V. Karpov , A. Möller , Y. Tampo

Efficient Chemical Space Exploration Using Active Learning Based on Marginalized Graph Kernel: an Application for Predicting the Thermodynamic Properties of Alkanes with Molecular Simulation

We introduce an explorative active learning (AL) algorithm based on Gaussian process regression and marginalized graph kernel (GPR-MGK) to explore chemical space with minimum cost. Using high-throughput molecular dynamics simulation to…

Machine Learning · Computer Science 2022-09-02 Yan Xiang , Yu-Hang Tang , Zheng Gong , Hongyi Liu , Liang Wu , Guang Lin , Huai Sun