Related papers: The UVES Spectral Quasar Absorption Database (SQUA…

Ensemble power spectral density of SDSS quasars in UV/optical bands

Context: Quasar variability has proven to be a powerful tool to constrain the properties of their inner engine and the accretion process onto supermassive black holes. Correlations between UV/optical variability and physical properties have…

Astrophysics of Galaxies · Physics 2024-06-26 Vincenzo Petrecca , Iossif Papadakis , Maurizio Paolillo , Demetra De Cicco , Franz Bauer

The Rapid ASKAP Continuum Survey IV: continuum imaging at 1367.5 MHz and the first data release of RACS-mid

The Australian SKA Pathfinder (ASKAP) is being used to undertake a campaign to rapidly survey the sky in three frequency bands across its operational spectral range. The first pass of the Rapid ASKAP Continuum Survey (RACS) at 887.5 MHz in…

Instrumentation and Methods for Astrophysics · Physics 2023-08-09 S. W. Duchesne , A. J. M. Thomson , J. Pritchard , E. Lenc , V. A. Moss , D. McConnell , M. H. Wieringa , M. T. Whiting , Z. Wang , Y. Wang , K. Rose , W. Raja , Tara Murphy , J. K. Leung , M. T. Huynh , A. W. Hotan , T. Hodgson , G. H. Heald

A Spectroscopic Survey of Faint Quasars in the SDSS Deep Stripe: I. Preliminary Results from the Co-added Catalog

In this paper we present the first results of a deep spectroscopic survey of faint quasars in the Sloan Digital Sky Survey (SDSS) Southern Survey, a deep survey carried out by repeatedly imaging a 270 deg^2 area. Quasar candidates were…

Astrophysics · Physics 2008-11-26 L. Jiang , X. Fan , R. J. Cool , D. J. Eisenstein , I. Zehavi , G. T. Richards , R. Scranton , D. Johnston , M. A. Strauss , D. P. Schneider , J. Brinkmann

XQR-30: the ultimate XSHOOTER quasar sample at the reionization epoch

The final phase of the reionization process can be probed by rest-frame UV absorption spectra of quasars at z>6, shedding light on the properties of the diffuse intergalactic medium within the first Gyr of the Universe. The ESO Large…

Astrophysics of Galaxies · Physics 2023-06-21 Valentina D'Odorico , E. Banados , G. D. Becker , M. Bischetti , S. E. I. Bosman , G. Cupani , R. Davies , E. P. Farina , A. Ferrara , C. Feruglio , C. Mazzucchelli , E. Ryan-Weber , J. -T. Schindler , A. Sodini , B. P. Venemans , F. Walter , H. Chen , S. Lai , Y. Zhu , F. Bian , S. Campo , S. Carniani , S. Cristiani , F. Davies , R. Decarli , A. Drake , A. -C. Eilers , X. Fan , P. Gaikwad , S. Gallerani , B. Greig , M. G. Haehnelt , J. Hennawi , L. Keating , G. Kulkarni , A. Mesinger , R. A. Meyer , M. Neeleman , M. Onoue , A. Pallottini , Y. Qin , S. Rojas-Ruiz , S. Satyavolu , A. Sebastian , R. Tripodi , F. Wang , M. Wolfson , J. Yang , M. V. Zanchettin

Discovery of the Transition of a Mini-Broad Absorption Line into Broad Absorption in the SDSS Quasar J115122.14+020426.3

We present the detection of a rare case of dramatic strengthening in the UV absorption profiles in the spectrum of the quasar J115122.14+020426.3 between observations ~2.86 years apart in the quasar rest-frame. A 2001 spectrum from the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Paola Rodríguez Hidalgo , Michael Eracleous , Jane Charlton , Fred Hamann , Michael Murphy , Daniel Nestor

Towards an Understanding of Changing-Look Quasars: An Archival Spectroscopic Search in SDSS

The uncertain origin of the recently-discovered `changing-looking' quasar phenomenon -- in which a luminous quasar dims significantly to a quiescent state in repeat spectroscopy over ~10 year timescales -- may present unexpected challenges…

High Energy Astrophysical Phenomena · Physics 2016-08-17 John J. Ruan , Scott F. Anderson , Sabrina L. Cales , Michael Eracleous , Paul J. Green , Eric Morganson , Jessie C. Runnoe , Yue Shen , Tessa D. Wilkinson , Michael R. Blanton , Tom Dwelly , Antonis Georgakakis , Jenny E. Greene , Stephanie M. LaMassa , Andrea Merloni , Donald P. Schneider

The Sloan Digital Sky Survey Reverberation Mapping Project: H$\alpha$ and H$\beta$ Reverberation Measurements From First-year Spectroscopy and Photometry

We present reverberation mapping results from the first year of combined spectroscopic and photometric observations of the Sloan Digital Sky Survey Reverberation Mapping Project. We successfully recover reverberation time delays between the…

Astrophysics of Galaxies · Physics 2018-10-26 C. J. Grier , J. R. Trump , Yue Shen , Keith Horne , Karen Kinemuchi , Ian D. McGreer , D. A. Starkey , W. N. Brandt , P. B. Hall , C. S. Kochanek , Yuguang Chen , K. D. Denney , Jenny E. Greene , L. C. Ho , Y. Homayouni , Jennifer I-Hsiu Li , Liuyi Pei , B. M. Peterson , P. Petitjean , D. P. Schneider , Mouyuan Sun , Yusura AlSayyad , Dmitry Bizyaev , Jonathan Brinkmann , Joel R. Brownstein , Kevin Bundy , K S. Dawson , Sarah Eftekharzadeh , J. G. Fernandez-Trincado , Yang Gao , Timothy A. Hutchinson , Siyao Jia , Linhua Jiang , Daniel Oravetz , Kaike Pan , Isabelle Paris , Kara A. Ponder , Christina Peters , Jesse Rogerson , Audrey Simmons , Robyn Smith , Ran Wang

Euclid Preparation. Cosmic Dawn Survey: Data release 1 multiwavelength catalogues for Euclid Deep Field North and Euclid Deep Field Fornax

The Cosmic Dawn Survey (DAWN survey) provides multiwavelength (UV/optical to mid-IR) data across the combined 59 deg$^{2}$ of the Euclid Deep and Auxiliary fields (EDFs and EAFs). Here, the first public data release (DR1) from the DAWN…

Astrophysics of Galaxies · Physics 2025-03-26 Euclid Collaboration , L. Zalesky , C. J. R. McPartland , J. R. Weaver , S. Toft , D. B. Sanders , B. Mobasher , N. Suzuki , I. Szapudi , I. Valdes , G. Murphree , N. Chartab , N. Allen , S. Taamoli , S. W. J. Barrow , O. Chávez Ortiz , S. L. Finkelstein , S. Gwyn , M. Sawicki , H. J. McCracken , D. Stern , H. Dannerbauer , B. Altieri , S. Andreon , N. Auricchio , C. Baccigalupi , M. Baldi , S. Bardelli , R. Bender , C. Bodendorf , D. Bonino , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , V. Capobianco , C. Carbone , J. Carretero , S. Casas , F. J. Castander , M. Castellano , G. Castignani , S. Cavuoti , A. Cimatti , C. Colodro-Conde , G. Congedo , C. J. Conselice , L. Conversi , Y. Copin , L. Corcione , F. Courbin , H. M. Courtois , A. Da Silva , H. Degaudenzi , G. De Lucia , A. M. Di Giorgio , J. Dinis , F. Dubath , C. A. J. Duncan , X. Dupac , S. Dusini , M. Farina , S. Farrens , S. Ferriol , S. Fotopoulou , M. Frailis , E. Franceschi , S. Galeotta , B. Garilli , W. Gillard , B. Gillis , C. Giocoli , P. Gómez-Alvarez , A. Grazian , F. Grupp , S. V. H. Haugan , H. Hoekstra , W. Holmes , I. Hook , F. Hormuth , A. Hornstrup , P. Hudelot , K. Jahnke , B. Joachimi , E. Keihänen , S. Kermiche , A. Kiessling , M. Kilbinger , B. Kubik , K. Kuijken , M. Kümmel , M. Kunz , H. Kurki-Suonio , R. Laureijs , S. Ligori , P. B. Lilje , V. Lindholm , I. Lloro , G. Mainetti , D. Maino , E. Maiorano , O. Mansutti , O. Marggraf , K. Markovic , M. Martinelli , N. Martinet , F. Marulli , R. Massey , S. Maurogordato , S. Mei , Y. Mellier , M. Meneghetti , E. Merlin , G. Meylan , M. Moresco , L. Moscardini , E. Munari , 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 , E. Rossetti , R. Saglia , Z. Sakr , D. Sapone , R. Scaramella , M. Schirmer , P. Schneider , T. Schrabback , A. Secroun , E. Sefusatti , G. Seidel , S. Serrano , C. Sirignano , G. Sirri , L. Stanco , J. Steinwagner , P. Tallada-Crespí , H. I. Teplitz , I. Tereno , R. Toledo-Moreo , F. Torradeflot , I. Tutusaus , E. A. Valentijn , L. Valenziano , T. Vassallo , G. Verdoes Kleijn , A. Veropalumbo , Y. Wang , J. Weller , G. Zamorani , E. Zucca , M. Bolzonella , A. Boucaud , E. Bozzo , C. Burigana , D. Di Ferdinando , J. A. Escartin Vigo , R. Farinelli , J. Gracia-Carpio , N. Mauri , A. A. Nucita , V. Scottez , M. Tenti , M. Viel , M. Wiesmann , Y. Akrami , V. Allevato , S. Anselmi , M. Ballardini , M. Bethermin , A. Blanchard , L. Blot , S. Borgani , S. Bruton , R. Cabanac , A. Calabro , A. Cappi , C. S. Carvalho , T. Castro , K. C. Chambers , R. Chary , S. Contarini , T. Contini , A. R. Cooray , B. De Caro , G. Desprez , A. Díaz-Sánchez , S. Di Domizio , H. Dole , S. Escoffier , A. G. Ferrari , I. Ferrero , F. Finelli , F. Fornari , L. Gabarra , K. Ganga , J. García-Bellido , E. Gaztanaga , F. Giacomini , G. Gozaliasl , A. Hall , W. G. Hartley , H. Hildebrandt , J. Hjorth , M. Huertas-Company , O. Ilbert , A. Jimenez Muñoz , J. J. E. Kajava , V. Kansal , D. Karagiannis , C. C. Kirkpatrick , L. Legrand , G. Libet , A. Loureiro , J. Macias-Perez , G. Maggio , M. Magliocchetti , C. Mancini , F. Mannucci , R. Maoli , C. J. A. P. Martins , S. Matthew , L. Maurin , R. B. Metcalf , P. Monaco , C. Moretti , G. Morgante , Nicholas A. Walton , J. Odier , L. Patrizii , A. Pezzotta , M. Pöntinen , V. Popa , C. Porciani , D. Potter , P. Reimberg , I. Risso , P. -F. Rocci , M. Sahlén , C. Scarlata , A. Schneider , M. Sereno , A. Silvestri , P. Simon , A. Spurio Mancini , S. A. Stanford , C. Tao , G. Testera , R. Teyssier , S. Tosi , A. Troja , M. Tucci , C. Valieri , J. Valiviita , D. Vergani , G. Verza , I. A. Zinchenko

Quasars as Absorption Probes of the J0053+1234 Region

We present UBRI photometry and spectra for 60 quasars found within one square degree centered on the J0053+1234 region, which has been the subject of the Caltech Faint Galaxy Redshift Survey. Candidate quasars were selected by their…

Astrophysics · Physics 2009-11-10 D. H. McIntosh , C. D. Impey , C. E. Petry

The first direct imaging of the silhouette of a damped Lyman $\alpha$ system along the line-of-sight to a background galaxy

The H~{\sc i} gas distribution in damped Lyman $\alpha$ absorbers (DLAs) has remained elusive due to the point-source nature of background quasar emission. Observing DLAs against spatially extended background galaxies provides a new method…

Cosmology and Nongalactic Astrophysics · Physics 2025-09-29 Fuga Komori , Akio K. Inoue , Ken Mawatari , Yuma Sugahara , Hideki Umehata , Rhythm Shimakawa , Satoshi Yamanaka , Takuya Hashimoto , Jorryt Matthee , Toru Misawa

Peering through the OH-forest: a new technique to remove residual sky features from SDSS spectra

The Sloan Digital Sky Survey (SDSS) currently provides by far the largest homogeneous sample of intermediate signal-to-noise ratio (S/N) optical spectra of galaxies and quasars. The fully automated SDSS spectroscopic reduction pipeline has…

Astrophysics · Physics 2009-09-29 Vivienne Wild , Paul C. Hewett

A glance at the host galaxy of high-redshift quasars using strong damped Lyman-alpha systems as coronagraphs

We searched quasar spectra from the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS) for the rare occurrences where a strong damped Lyman-alpha absorber (DLA) blocks the Broad Line Region emission from the quasar and acts as a…

Astrophysics of Galaxies · Physics 2015-06-16 Hayley Finley , Patrick Petitjean , Isabelle Pâris , Pasquier Noterdaeme , Jonathan Brinkmann , Adam D. Myers , Nicholas P. Ross , Donald P. Schneider , Dmitry Bizyaev , Howard Brewington , Garrett Ebelke , Elena Malanushenko , Viktor Malanushenko , Daniel Oravetz , Kaike Pan , Audrey Simmons , Stephanie Snedden

Astronomical Spectroscopy with Skipper CCDs: First Results from a Skipper CCD Focal Plane Prototype at SIFS

We present the first on-sky results from an ultra-low-readout-noise Skipper CCD focal plane prototype for the SOAR Integral Field Spectrograph (SIFS). The Skipper CCD focal plane consists of four 6k x 1k, 15 $\mu$m pixel, fully-depleted,…

Instrumentation and Methods for Astrophysics · Physics 2024-10-08 Edgar Marrufo Villalpando , Alex Drlica-Wagner , Brandon Roach , Marco Bonati , Abhishek Bakshi , Julia Campa , Gustavo Cancelo , Braulio Cancino , Claudio R. Chavez , Fernando Chierchie , Juan Estrada , Guillermo Fernandez Moroni , Luciano Fraga , Manuel E. Gaido , Stephen E. Holland , Rachel Hur , Michelle Jonas , Peter Moore , Eduardo Paolini , Andrés A. Plazas Malagón , Leandro Stefanazzi , Javier Tiffenberg , Ken Treptou , Sho Uemura , Neal Wilcer

Quasar identifications from the slitless spectra: a test from 3D-HST

Slitless spectroscopy is a traditional method for selecting quasars. In this paper, we develop a procedure for selecting quasars (QSOs) using the 3D-HST G141 slitless spectra. We initially identify over 6,000 sources with emission lines…

Astrophysics of Galaxies · Physics 2025-05-21 Yuxuan Pang , Xue-Bing Wu , Yuming Fu , Rui Zhu , Tao Ji , Qinchun Ma , Xiaotong Feng

Surveys for z > 3 Damped Lyman-alpha Absorption Systems

We have completed spectroscopic observations using LRIS on the Keck 1 telescope of 30 very high redshift quasars, 11 selected for the presence of damped Ly-alpha absorption systems and 19 with redshifts z > 3.5 not previously surveyed for…

Astrophysics · Physics 2009-10-31 Lisa J. Storrie-Lombardi , Arthur M. Wolfe

Euclid Quick Data Release (Q1): From spectrograms to spectra: the SIR spectroscopic Processing Function

The Euclid space mission aims to investigate the nature of dark energy and dark matter by mapping the large-scale structure of the Universe. A key component of Euclid's observational strategy is slitless spectroscopy, conducted using the…

Instrumentation and Methods for Astrophysics · Physics 2025-11-13 Euclid Collaboration , Y. Copin , M. Fumana , C. Mancini , P. N. Appleton , R. Chary , S. Conseil , A. L. Faisst , S. Hemmati , D. C. Masters , C. Scarlata , M. Scodeggio , A. Alavi , A. Carle , P. Casenove , T. Contini , I. Das , W. Gillard , G. Herzog , J. Jacobson , V. Le Brun , D. Maino , G. Setnikar , N. R. Stickley , D. Tavagnacco , Q. Xie , N. Aghanim , B. Altieri , A. Amara , S. Andreon , N. Auricchio , H. Aussel , C. Baccigalupi , M. Baldi , A. Balestra , S. Bardelli , A. Basset , P. Battaglia , A. N. Belikov , A. Biviano , A. Bonchi , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , G. Cañas-Herrera , V. Capobianco , C. Carbone , J. Carretero , S. Casas , F. J. Castander , M. Castellano , G. Castignani , S. Cavuoti , K. C. Chambers , A. Cimatti , C. Colodro-Conde , G. Congedo , C. J. Conselice , L. Conversi , F. Courbin , H. M. Courtois , A. Da Silva , R. da Silva , H. Degaudenzi , S. de la Torre , G. De Lucia , A. M. Di Giorgio , H. Dole , F. Dubath , X. Dupac , S. Dusini , A. Ealet , S. Escoffier , M. Farina , R. Farinelli , S. Ferriol , F. Finelli , S. Fotopoulou , N. Fourmanoit , M. Frailis , E. Franceschi , P. Franzetti , S. Galeotta , K. George , B. Gillis , C. Giocoli , J. Gracia-Carpio , B. R. Granett , A. Grazian , F. Grupp , L. Guzzo , S. V. H. Haugan , J. Hoar , H. Hoekstra , W. Holmes , I. M. Hook , F. Hormuth , A. Hornstrup , P. Hudelot , K. Jahnke , M. Jhabvala , B. Joachimi , E. Keihänen , S. Kermiche , A. Kiessling , B. Kubik , K. Kuijken , M. Kümmel , M. Kunz , H. Kurki-Suonio , Q. Le Boulc'h , A. M. C. Le Brun , D. Le Mignant , S. Ligori , P. B. Lilje , V. Lindholm , I. Lloro , G. Mainetti , E. Maiorano , O. Mansutti , S. Marcin , O. Marggraf , K. Markovic , 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 , P. W. Morris , L. Moscardini , R. Nakajima , C. Neissner , R. C. Nichol , 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 , G. D. Racca , F. Raison , R. Rebolo , A. Renzi , J. Rhodes , G. Riccio , E. Romelli , M. Roncarelli , E. Rossetti , R. Saglia , Z. Sakr , A. G. Sánchez , D. Sapone , B. Sartoris , J. A. Schewtschenko , M. Schirmer , P. Schneider , T. Schrabback , A. Secroun , E. Sefusatti , G. Seidel , S. Serrano , P. Simon , C. Sirignano , G. Sirri , A. Spurio Mancini , L. Stanco , J. Steinwagner , P. Tallada-Crespí , A. N. Taylor , H. I. Teplitz , I. Tereno , N. Tessore , 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 , S. Alvi , I. T. Andika , S. Anselmi , M. Archidiacono , F. Atrio-Barandela , C. Benoist , K. Benson , P. Bergamini , D. Bertacca , M. Bethermin , L. Bisigello , A. Blanchard , L. Blot , M. L. Brown , S. Bruton , A. Calabro , B. Camacho Quevedo , F. Caro , 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. M. N. Ferguson , A. G. Ferrari , A. Finoguenov , A. Fontana , A. Franco , K. Ganga , J. García-Bellido , T. Gasparetto , V. Gautard , E. Gaztanaga , F. Giacomini , F. Gianotti , G. Gozaliasl , A. Gregorio , M. Guidi , C. M. Gutierrez , A. Hall , W. G. Hartley , C. Hernández-Monteagudo , H. Hildebrandt , J. Hjorth , S. Hosseini , 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 , A. Loureiro , J. Macias-Perez , G. Maggio , M. Magliocchetti , F. Mannucci , R. Maoli , C. J. A. P. Martins , L. Maurin , C. J. R. McPartland , M. Miluzio , P. Monaco , A. Montoro , C. Moretti , G. Morgante , C. Murray , S. Nadathur , 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 , A. Schneider , D. Sciotti , E. Sellentin , L. C. Smith , K. Tanidis , C. Tao , G. Testera , R. Teyssier , S. Tosi , A. Troja , M. Tucci , C. Valieri , A. Venhola , D. Vergani , G. Verza , P. Vielzeuf , N. A. Walton , M. Bella , D. Scott

A Composite HST Spectrum of Quasars

We construct a composite quasar spectrum from 284 HST FOS spectra of 101 quasars with redshifts z > 0.33. The spectrum covers the wavelengths between 350 and 3000 A in the rest frame. There is a significant steepening of the continuum slope…

Astrophysics · Physics 2009-10-28 W. Zheng , G. A. Kriss , R. C. Telfer , J. P. Grimes , A. F. Davidsen

New Quasars Detected via Variability in the QUEST1 Survey

By observing the high galactic latitude equatorial sky in drift scan mode with the QUEST (QUasar Equatorial Survey Team) Phase 1 camera, multi-bandpass photometry on a large strip of sky, resolved over a large range of time scales (from…

Astrophysics · Physics 2009-11-10 A. W. Rengstorf , S. L. Mufson , C. Abad , B. Adams , P. Andrews , C. Bailyn , C. Baltay , A. Bongiovanni , C. Briceno , G. Bruzual , P. Coppi , F. Della Prugna , W. Emmet , I. Ferrin , F. Fuenmayor , M. Gebhard , J. Hernandez , R. K. Honeycutt , G. Magris , J. Musser , O. Naranjo , A. Oemler , P. Rosenzweig , C. N. Sabbey , Ge. Sanchez , Gu. Sanchez , B. Schaefer , H. Schenner , J. Sinnott , J. A. Snyder , S. Sofia , J. Stock , W. van Altena , A. K. Vivas

A Database of Phase Calibration Sources and their Radio Spectra for the Giant Metrewave Radio Telescope

We are pursuing a project to build a database of phase calibration sources suitable for Giant Metrewave Radio Telescope (GMRT). Here we present the first release of 45 low frequency calibration sources at 235 MHz and 610 MHz. These…

Instrumentation and Methods for Astrophysics · Physics 2016-10-19 Dharam V. Lal , Shilpa S. Dubal , Sachin S. Sherkar

The near-to-mid infrared spectrum of quasars

We analyse a sample of 85 luminous (log(nuLnu(3\um)/erg s-1)>45.5) quasars with restframe ~2-11 \um spectroscopy from AKARI and Spitzer. Their high luminosity allows a direct determination of the near-infrared quasar spectrum free from host…

Astrophysics of Galaxies · Physics 2016-08-31 Antonio Hernán-Caballero , Evanthia Hatziminaoglou , Almudena Alonso-Herrero , Silvia Mateos