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Horizon 2020 ERC
STFC
U.S. Department of Energy
U.S. National Science Foundation
Ministry of Science and Education of Spain
Science and Technology Facilities Council of the United Kingdom
Higher Education Funding Council for England
National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign
Kavli Institute of Cosmological Physics at the University of Chicago
Center for Cosmology and Astro-Particle Physics at the Ohio State University
Mitchell Institute for Fundamental Physics and Astronomy at Texas AM University
Financiadora de Estudos e Projetos
Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Minist'erio da Ciencia, Tecnologia e Inovacao
Deutsche Forschungsgemeinschaft
National Science Foundation
MINECO
European Union
CERCA programme of the Generalitat de Catalunya
European Research Council under the European Union
Fermi Research Alliance, LLC
U.S. Department of Energy, Office of Science, Office of High Energy Physics
We present multiwavelength spectral and temporal variability analysis of PKS 0027-426 using optical griz observations from Dark Energy Survey between 2013 and 2018 and VEILS Optical Light curves of Extragalactic TransienT Events (VOILIATE) between 2018 and 2019 and near-infrared (NIR) JKs observations from Visible and Infrared Survey Telescope for Astronomy Extragalactic Infrared Legacy Survey (VEILS) between 2017 and 2019. Multiple methods of cross-correlation of each combination of light curve provides measurements of possible lags between optical-optical, optical-NIR, and NIR-NIR emission, for each observation season and for the entire observational period. Inter-band time lag measurements consistently suggest either simultaneous emission or delays between emission regions on time-scales smaller than the cadences of observations. The colour-magnitude relation between each combination of filters was also studied to determine the spectral behaviour of PKS 0027-426. Our results demonstrate complex colour behaviour that changes between bluer when brighter, stable when brighter, and redder when brighter trends over different time-scales and using different combinations of optical filters. Additional analysis of the optical spectra is performed to provide further understanding of this complex spectral behaviour.
Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
South Carolina State Univ, Dept Biol & Phys Sci, Orangeburg, SC 29117 USA
Univ St Andrews, SUPA Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kita Ku, Kyoto 6038555, Japan
Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA
Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
Ctr Invest Energet Medioambientales & Tecnol CIEM, Madrid 28040, Spain
Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England
Inst Astrophys Paris, CNRS, UMR 7095, F-75014 Paris, France
Sorbonne Univ, Inst Astrophys Paris, UMR 7095, UPMC Univ Paris 06, F-75014 Paris, France
UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA
SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
Inst Astrofis Canarias, Dept Astrophys Res, E-38205 Tenerife, Spain
Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain
Astrophys Observ Turin, INAF, I-10025 Pino Torinese, Italy
Natl Ctr Supercomp Applicat, Ctr Astrophys Surveys, 1205 West Clark St, Urbana, IL 61801 USA
Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA
Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, Campus UAB, Bellaterra 08193, Barcelona, Spain
Univ Trieste, Dept Phys, Astron Unit, Via Tiepolo 11, I-34131 Trieste, Italy
INAF Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34143 Trieste, Italy
Inst Fundamental Phys Universe, Via Beirut 2, I-34014 Trieste, Italy
Observ Nacl, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia
Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
Univ Oslo, Inst Theoret Astrophys, POB 1029 Blindern, NO-0315 Oslo, Norway
Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
Ludwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich, Germany
Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA
DLR Inst Data Sci, Dept Data Management, D-07745 Jena, Germany
Max Planck Inst Radioastron, Dept Fundamental Phys Radio Astron, D-53121 Bonn, Germany
Macquarie Univ, Australian Astron Opt, N Ryde, NSW 2113, Australia
Lowell Observ, 1400 Mars Hill Rd, Flagstaff, AZ 86001 USA
Univ Sydney, Sch Phys, Sydney Inst Astron, A28, Sydney, NSW 2006, Australia
Australian Natl Univ, Coll Sci, Ctr Gravitat Astrophys, Canberra, ACT 2601, Australia
Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2601, Australia
Univ Sao Paulo, Inst Fis, Dept Fis Matemat, CP 66318, BR-05314970 Sao Paulo, SP, Brazil
Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain
Univ Wisconsin, Phys Dept, 2320 Chamberlin Hall,1150 Univ Ave, Madison, WI 53706 USA
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 08544 USA
Inst Estudis Espacials Catalunya IEEC, D-08034 Barcelona, Spain
CSIC, Dept Cosmol & Fundamental Phys, Inst Space Sci ICE, Campus UAB,Carrer Can Magrans S-N, D-08193 Barcelona, Spain
CSIC, Adv Engn Unit, Inst Space Sci ICE, Campus UAB,Carrer Can Magrans S-N, D-08193 Barcelona, Spain
Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia
Oak Ridge Natl Lab, Comp Sci & Math Div, POB 2009, Oak Ridge, TN 37831 USA
Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA
Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
Horizon 2020 ERC: ERC-2015-StG-677117
National Science Foundation: AST-1138766
National Science Foundation: AST-1536171
MINECO: AYA2015-71825
MINECO: ESP2015-66861
MINECO: FPA2015-68048
MINECO: SEV-2016-0588
MINECO: SEV-2016-0597
MINECO: MDM-2015-0509
European Research Council under the European Union: 240672
European Research Council under the European Union: 291329
European Research Council under the European Union: 306478
CNPq: 465376/2014-2
Fermi Research Alliance, LLC: DE-AC02-07CH11359
