{"id":2213349,"slug":"qso-b1640-3944","name":"QSO B1640+3944","domain":"deep-sky","class":"quasar","otype":"QSO","otype_label":"QSO","ra":250.54638777876,"dec":39.64361820716,"coo_err_mas":0.2009,"coo_bibcode":"2020yCat.1350....0G","plx_mas":null,"pmra":-0.408,"pmdec":-0.071,"rv_kms":134155.12,"redshift":0.6186,"dist_pc":null,"vmag":20.51,"bmag":20.59,"gmag":19.30249,"jmag":null,"kmag":null,"sp_type":null,"morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":12,"simbad_oid":2917484,"gaia_dr3":1355650764206846336,"jpl_spkid":null,"ned_name":"WISEA J164211.17+393837.1","exo_name":null,"host_object_id":null,"depth":1,"deep_at":"2026-10-02T10:49:30.641255+00:00","views":21,"first_seen":"2026-08-14T16:51:05.817432+00:00","updated_at":"2026-08-14T16:51:05.817432+00:00","identifiers":["[A97] J164211.2+393836","[CCS88] 1640.5+3944","[CR82] 1640.5+397","Gaia DR3 1355650764206846336","[HB93] 1640+397","QSO B1640+3944","QSO B1640.5+3944","RX J164211.2+393836","SDSS J164211.13+393837.0","[VV2000] J164211.2+393836","[VV2003] J164211.2+393836","[VV2006] J164211.2+393836","[VV2010c] J164211.2+393837","[VV96] J164211.2+393836","[VV98] J164211.2+393836"],"measurements":[{"parameter":"magnitude","value":19.30249,"value_text":null,"unit":"mag","err_plus":null,"err_minus":null,"band":"G","method":"Gaia DR3","source":"gaia-dr3","reference":"2023A&A...674A...1G","ref_year":2023},{"parameter":"magnitude","value":20.9162,"value_text":null,"unit":"mag","err_plus":0.0637,"err_minus":0.0637,"band":"u","method":"A","source":"simbad","reference":"2020ApJS..250....8L","ref_year":2020},{"parameter":"magnitude","value":20.1084,"value_text":null,"unit":"mag","err_plus":0.1102,"err_minus":0.1102,"band":"z","method":"A","source":"simbad","reference":"2020ApJS..250....8L","ref_year":2020},{"parameter":"magnitude","value":20.0993,"value_text":null,"unit":"mag","err_plus":0.0325,"err_minus":0.0325,"band":"i","method":"A","source":"simbad","reference":"2020ApJS..250....8L","ref_year":2020},{"parameter":"magnitude","value":20.6146,"value_text":null,"unit":"mag","err_plus":0.0331,"err_minus":0.0331,"band":"r","method":"A","source":"simbad","reference":"2020ApJS..250....8L","ref_year":2020},{"parameter":"magnitude","value":19.30249,"value_text":null,"unit":"mag","err_plus":0.010045,"err_minus":0.010045,"band":"G","method":"V","source":"simbad","reference":"2020yCat.1350....0G","ref_year":2020},{"parameter":"magnitude","value":20.4745,"value_text":null,"unit":"mag","err_plus":0.029,"err_minus":0.029,"band":"g","method":"A","source":"simbad","reference":"2020ApJS..250....8L","ref_year":2020},{"parameter":"magnitude","value":20.59,"value_text":null,"unit":"mag","err_plus":null,"err_minus":null,"band":"B","method":"V","source":"simbad","reference":"2010A&A...518A..10V","ref_year":2010},{"parameter":"magnitude","value":20.51,"value_text":null,"unit":"mag","err_plus":null,"err_minus":null,"band":"V","method":"V","source":"simbad","reference":"2010A&A...518A..10V","ref_year":2010},{"parameter":"parallax","value":-0.625583448794031,"value_text":null,"unit":"mas","err_plus":0.23054656,"err_minus":0.23054656,"band":null,"method":"Gaia DR3","source":"gaia-dr3","reference":"2023A&A...674A...1G","ref_year":2023},{"parameter":"pm_dec","value":-0.07115370098465713,"value_text":null,"unit":"mas/yr","err_plus":0.3069804,"err_minus":0.3069804,"band":null,"method":"Gaia DR3","source":"gaia-dr3","reference":"2023A&A...674A...1G","ref_year":2023},{"parameter":"pm_dec","value":-0.071,"value_text":null,"unit":"mas/yr","err_plus":0.307,"err_minus":0.307,"band":null,"method":"ICRS","source":"simbad","reference":"2020yCat.1350....0G","ref_year":2020},{"parameter":"pm_ra","value":-0.4084699094264358,"value_text":null,"unit":"mas/yr","err_plus":0.2854961,"err_minus":0.2854961,"band":null,"method":"Gaia DR3","source":"gaia-dr3","reference":"2023A&A...674A...1G","ref_year":2023},{"parameter":"pm_ra","value":-0.408,"value_text":null,"unit":"mas/yr","err_plus":0.285,"err_minus":0.285,"band":null,"method":"ICRS","source":"simbad","reference":"2020yCat.1350....0G","ref_year":2020},{"parameter":"radial_velocity","value":0.6186,"value_text":null,"unit":"km/s","err_plus":0.0055,"err_minus":0.0055,"band":null,"method":"z","source":"simbad","reference":"2022yCat.1356....0G","ref_year":2022},{"parameter":"radial_velocity","value":2.714066,"value_text":null,"unit":"km/s","err_plus":null,"err_minus":null,"band":null,"method":"z","source":"simbad","reference":"2020ApJS..250....8L","ref_year":2020},{"parameter":"radial_velocity","value":0.625,"value_text":null,"unit":"km/s","err_plus":null,"err_minus":null,"band":null,"method":"z","source":"simbad","reference":"2001AJ....121.2843B","ref_year":2001},{"parameter":"radial_velocity","value":0.625,"value_text":null,"unit":"km/s","err_plus":null,"err_minus":null,"band":null,"method":"z","source":"simbad","reference":"1998A&A...330..108Y","ref_year":1998},{"parameter":"redshift","value":0.525,"value_text":null,"unit":null,"err_plus":null,"err_minus":null,"band":null,"method":null,"source":"ned","reference":"2009ApJS..180...67R","ref_year":2009},{"parameter":"ruwe","value":1.0362322,"value_text":null,"unit":null,"err_plus":null,"err_minus":null,"band":null,"method":"Gaia DR3","source":"gaia-dr3","reference":"2023A&A...674A...1G","ref_year":2023},{"parameter":"sed_flux","value":3.62e-05,"value_text":null,"unit":"Jy","err_plus":2.2e-06,"err_minus":2.2e-06,"band":"SDSS:r","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":3.63e-05,"value_text":null,"unit":"Jy","err_plus":9e-07,"err_minus":9e-07,"band":"SDSS:g","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":1.58e-05,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"SDSS:u","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":5.63e-05,"value_text":null,"unit":"Jy","err_plus":4.2e-06,"err_minus":4.2e-06,"band":"GALEX:NUV","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":1.88e-05,"value_text":null,"unit":"Jy","err_plus":3.9e-06,"err_minus":3.9e-06,"band":"GALEX:FUV","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":6.38e-05,"value_text":null,"unit":"Jy","err_plus":3.6e-06,"err_minus":3.6e-06,"band":"GAIA/GAIA3:Grp","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":6.14e-05,"value_text":null,"unit":"Jy","err_plus":6e-07,"err_minus":6e-07,"band":"GAIA/GAIA3:G","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":6.62e-05,"value_text":null,"unit":"Jy","err_plus":2.4e-06,"err_minus":2.4e-06,"band":"GAIA/GAIA3:Gbp","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":9.59e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"HIP:Hp","method":"I/358/varisum","source":"vizier","reference":"I/358/varisum","ref_year":null},{"parameter":"sed_flux","value":0.00228,"value_text":null,"unit":"Jy","err_plus":0.00071,"err_minus":0.00071,"band":"WISE:W4","method":"II/311/wise","source":"vizier","reference":"II/311/wise","ref_year":null},{"parameter":"sed_flux","value":0.000637,"value_text":null,"unit":"Jy","err_plus":7.9e-05,"err_minus":7.9e-05,"band":"WISE:W3","method":"II/311/wise","source":"vizier","reference":"II/311/wise","ref_year":null},{"parameter":"sed_flux","value":0.000302,"value_text":null,"unit":"Jy","err_plus":1.3e-05,"err_minus":1.3e-05,"band":"WISE:W2","method":"II/311/wise","source":"vizier","reference":"II/311/wise","ref_year":null},{"parameter":"sed_flux","value":0.000225,"value_text":null,"unit":"Jy","err_plus":8e-06,"err_minus":8e-06,"band":"WISE:W1","method":"II/311/wise","source":"vizier","reference":"II/311/wise","ref_year":null},{"parameter":"sed_flux","value":5.76e-05,"value_text":null,"unit":"Jy","err_plus":4.4e-06,"err_minus":4.4e-06,"band":"GALEX:NUV","method":"II/312/ais","source":"vizier","reference":"II/312/ais","ref_year":null},{"parameter":"sed_flux","value":2.15e-05,"value_text":null,"unit":"Jy","err_plus":4.1e-06,"err_minus":4.1e-06,"band":"GALEX:FUV","method":"II/312/ais","source":"vizier","reference":"II/312/ais","ref_year":null},{"parameter":"sed_flux","value":0.00248,"value_text":null,"unit":"Jy","err_plus":0.00082,"err_minus":0.00082,"band":"WISE:W4","method":"II/328/allwise","source":"vizier","reference":"II/328/allwise","ref_year":null},{"parameter":"sed_flux","value":0.000606,"value_text":null,"unit":"Jy","err_plus":0.000107,"err_minus":0.000107,"band":"WISE:W3","method":"II/328/allwise","source":"vizier","reference":"II/328/allwise","ref_year":null},{"parameter":"sed_flux","value":0.000331,"value_text":null,"unit":"Jy","err_plus":1.1e-05,"err_minus":1.1e-05,"band":"WISE:W2","method":"II/328/allwise","source":"vizier","reference":"II/328/allwise","ref_year":null},{"parameter":"sed_flux","value":0.000244,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"WISE:W1","method":"II/328/allwise","source":"vizier","reference":"II/328/allwise","ref_year":null},{"parameter":"sed_flux","value":5.63e-05,"value_text":null,"unit":"Jy","err_plus":4.2e-06,"err_minus":4.2e-06,"band":"GALEX:NUV","method":"II/335/galex_ais","source":"vizier","reference":"II/335/galex_ais","ref_year":null},{"parameter":"sed_flux","value":1.88e-05,"value_text":null,"unit":"Jy","err_plus":3.9e-06,"err_minus":3.9e-06,"band":"GALEX:FUV","method":"II/335/galex_ais","source":"vizier","reference":"II/335/galex_ais","ref_year":null},{"parameter":"sed_flux","value":3.45e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"UVOT:U","method":"II/339/uvotssc1","source":"vizier","reference":"II/339/uvotssc1","ref_year":null},{"parameter":"sed_flux","value":3.05e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"UVOT:UVW1","method":"II/339/uvotssc1","source":"vizier","reference":"II/339/uvotssc1","ref_year":null},{"parameter":"sed_flux","value":2.18e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"UVOT:UVW2","method":"II/339/uvotssc1","source":"vizier","reference":"II/339/uvotssc1","ref_year":null},{"parameter":"sed_flux","value":0.00012,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"XMM-OT:V","method":"II/340/xmmom2_1","source":"vizier","reference":"II/340/xmmom2_1","ref_year":null},{"parameter":"sed_flux","value":2.83e-05,"value_text":null,"unit":"Jy","err_plus":1.6e-06,"err_minus":1.6e-06,"band":"XMM-OT:U","method":"II/340/xmmom2_1","source":"vizier","reference":"II/340/xmmom2_1","ref_year":null},{"parameter":"sed_flux","value":3.29e-05,"value_text":null,"unit":"Jy","err_plus":1.9e-06,"err_minus":1.9e-06,"band":"XMM-OT:UVW1","method":"II/340/xmmom2_1","source":"vizier","reference":"II/340/xmmom2_1","ref_year":null},{"parameter":"sed_flux","value":3.7e-05,"value_text":null,"unit":"Jy","err_plus":3.1e-06,"err_minus":3.1e-06,"band":"XMM-OT:UVM2","method":"II/340/xmmom2_1","source":"vizier","reference":"II/340/xmmom2_1","ref_year":null},{"parameter":"sed_flux","value":5.5e-05,"value_text":null,"unit":"Jy","err_plus":5.1e-06,"err_minus":5.1e-06,"band":"PAN-STARRS/PS1:y","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":4.27e-05,"value_text":null,"unit":"Jy","err_plus":2.4e-06,"err_minus":2.4e-06,"band":"PAN-STARRS/PS1:z","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":6.92e-05,"value_text":null,"unit":"Jy","err_plus":8e-07,"err_minus":8e-07,"band":"PAN-STARRS/PS1:i","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":3.61e-05,"value_text":null,"unit":"Jy","err_plus":2.1e-06,"err_minus":2.1e-06,"band":"PAN-STARRS/PS1:r","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":3.62e-05,"value_text":null,"unit":"Jy","err_plus":9e-07,"err_minus":9e-07,"band":"PAN-STARRS/PS1:g","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":2.82e-05,"value_text":null,"unit":"Jy","err_plus":1.6e-06,"err_minus":1.6e-06,"band":"XMM-OT:U","method":"II/356/xmmom41s","source":"vizier","reference":"II/356/xmmom41s","ref_year":null},{"parameter":"sed_flux","value":3.26e-05,"value_text":null,"unit":"Jy","err_plus":1.9e-06,"err_minus":1.9e-06,"band":"XMM-OT:UVW1","method":"II/356/xmmom41s","source":"vizier","reference":"II/356/xmmom41s","ref_year":null},{"parameter":"sed_flux","value":3.65e-05,"value_text":null,"unit":"Jy","err_plus":3e-06,"err_minus":3e-06,"band":"XMM-OT:UVM2","method":"II/356/xmmom41s","source":"vizier","reference":"II/356/xmmom41s","ref_year":null},{"parameter":"sed_flux","value":0.00039,"value_text":null,"unit":"Jy","err_plus":5e-06,"err_minus":5e-06,"band":"WISE:W2","method":"II/365/catwise","source":"vizier","reference":"II/365/catwise","ref_year":null},{"parameter":"sed_flux","value":0.00029,"value_text":null,"unit":"Jy","err_plus":4e-06,"err_minus":4e-06,"band":"WISE:W1","method":"II/365/catwise","source":"vizier","reference":"II/365/catwise","ref_year":null},{"parameter":"sed_flux","value":2.82e-05,"value_text":null,"unit":"Jy","err_plus":1.6e-06,"err_minus":1.6e-06,"band":"XMM-OT:U","method":"II/370/xmmom5s","source":"vizier","reference":"II/370/xmmom5s","ref_year":null},{"parameter":"sed_flux","value":3.25e-05,"value_text":null,"unit":"Jy","err_plus":1.9e-06,"err_minus":1.9e-06,"band":"XMM-OT:UVW1","method":"II/370/xmmom5s","source":"vizier","reference":"II/370/xmmom5s","ref_year":null},{"parameter":"sed_flux","value":3.63e-05,"value_text":null,"unit":"Jy","err_plus":3e-06,"err_minus":3e-06,"band":"XMM-OT:UVM2","method":"II/370/xmmom5s","source":"vizier","reference":"II/370/xmmom5s","ref_year":null},{"parameter":"sed_flux","value":2.82e-05,"value_text":null,"unit":"Jy","err_plus":1.6e-06,"err_minus":1.6e-06,"band":"XMM-OT:U","method":"II/378/xmmom6s","source":"vizier","reference":"II/378/xmmom6s","ref_year":null},{"parameter":"sed_flux","value":3.26e-05,"value_text":null,"unit":"Jy","err_plus":1.9e-06,"err_minus":1.9e-06,"band":"XMM-OT:UVW1","method":"II/378/xmmom6s","source":"vizier","reference":"II/378/xmmom6s","ref_year":null},{"parameter":"sed_flux","value":3.65e-05,"value_text":null,"unit":"Jy","err_plus":3e-06,"err_minus":3e-06,"band":"XMM-OT:UVM2","method":"II/378/xmmom6s","source":"vizier","reference":"II/378/xmmom6s","ref_year":null},{"parameter":"sed_flux","value":5.5e-05,"value_text":null,"unit":"Jy","err_plus":6.5e-06,"err_minus":6.5e-06,"band":"PAN-STARRS/PS1:y","method":"II/389/ps1_dr2","source":"vizier","reference":"II/389/ps1_dr2","ref_year":null},{"parameter":"sed_flux","value":4.27e-05,"value_text":null,"unit":"Jy","err_plus":2.3e-06,"err_minus":2.3e-06,"band":"PAN-STARRS/PS1:z","method":"II/389/ps1_dr2","source":"vizier","reference":"II/389/ps1_dr2","ref_year":null},{"parameter":"sed_flux","value":6.92e-05,"value_text":null,"unit":"Jy","err_plus":9e-07,"err_minus":9e-07,"band":"PAN-STARRS/PS1:i","method":"II/389/ps1_dr2","source":"vizier","reference":"II/389/ps1_dr2","ref_year":null},{"parameter":"sed_flux","value":3.61e-05,"value_text":null,"unit":"Jy","err_plus":1.9e-06,"err_minus":1.9e-06,"band":"PAN-STARRS/PS1:r","method":"II/389/ps1_dr2","source":"vizier","reference":"II/389/ps1_dr2","ref_year":null},{"parameter":"sed_flux","value":3.62e-05,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"PAN-STARRS/PS1:g","method":"II/389/ps1_dr2","source":"vizier","reference":"II/389/ps1_dr2","ref_year":null},{"parameter":"sed_flux","value":3.28e-05,"value_text":null,"unit":"Jy","err_plus":3.4e-06,"err_minus":3.4e-06,"band":"SDSS:z","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":3.38e-05,"value_text":null,"unit":"Jy","err_plus":1.1e-06,"err_minus":1.1e-06,"band":"SDSS:i","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":6.25e-05,"value_text":null,"unit":"Jy","err_plus":4e-07,"err_minus":4e-07,"band":"Gaia:G","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":2.06e-05,"value_text":null,"unit":"Jy","err_plus":6e-07,"err_minus":6e-07,"band":"SDSS:r","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":7.33e-05,"value_text":null,"unit":"Jy","err_plus":3.2e-06,"err_minus":3.2e-06,"band":"Johnson:V","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":2.38e-05,"value_text":null,"unit":"Jy","err_plus":5e-07,"err_minus":5e-07,"band":"SDSS:g","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":1.56e-05,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"SDSS:u","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":3.28e-05,"value_text":null,"unit":"Jy","err_plus":3.4e-06,"err_minus":3.4e-06,"band":"SDSS:z","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":3.38e-05,"value_text":null,"unit":"Jy","err_plus":1.1e-06,"err_minus":1.1e-06,"band":"SDSS:i","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":6.25e-05,"value_text":null,"unit":"Jy","err_plus":4e-07,"err_minus":4e-07,"band":"Gaia:G","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":2.06e-05,"value_text":null,"unit":"Jy","err_plus":6e-07,"err_minus":6e-07,"band":"SDSS:r","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":7.33e-05,"value_text":null,"unit":"Jy","err_plus":3.2e-06,"err_minus":3.2e-06,"band":"Johnson:V","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":2.38e-05,"value_text":null,"unit":"Jy","err_plus":5e-07,"err_minus":5e-07,"band":"SDSS:g","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":1.56e-05,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"SDSS:u","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":3.54e-05,"value_text":null,"unit":"Jy","err_plus":5.1e-06,"err_minus":5.1e-06,"band":"SDSS:z","method":"V/154/sdss16","source":"vizier","reference":"V/154/sdss16","ref_year":null},{"parameter":"sed_flux","value":3.82e-05,"value_text":null,"unit":"Jy","err_plus":1.3e-06,"err_minus":1.3e-06,"band":"SDSS:i","method":"V/154/sdss16","source":"vizier","reference":"V/154/sdss16","ref_year":null},{"parameter":"sed_flux","value":2.47e-05,"value_text":null,"unit":"Jy","err_plus":8e-07,"err_minus":8e-07,"band":"SDSS:r","method":"V/154/sdss16","source":"vizier","reference":"V/154/sdss16","ref_year":null},{"parameter":"sed_flux","value":2.74e-05,"value_text":null,"unit":"Jy","err_plus":6e-07,"err_minus":6e-07,"band":"SDSS:g","method":"V/154/sdss16","source":"vizier","reference":"V/154/sdss16","ref_year":null},{"parameter":"sed_flux","value":1.36e-05,"value_text":null,"unit":"Jy","err_plus":1.1e-06,"err_minus":1.1e-06,"band":"SDSS:u","method":"V/154/sdss16","source":"vizier","reference":"V/154/sdss16","ref_year":null},{"parameter":"sed_flux","value":0.000298,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"WISE:W1","method":"V/161/zcatdr1","source":"vizier","reference":"V/161/zcatdr1","ref_year":null},{"parameter":"sed_flux","value":6.86e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"CTIO/DECam:z","method":"V/161/zcatdr1","source":"vizier","reference":"V/161/zcatdr1","ref_year":null},{"parameter":"sed_flux","value":6.92e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"CTIO/DECam:r","method":"V/161/zcatdr1","source":"vizier","reference":"V/161/zcatdr1","ref_year":null},{"parameter":"sed_flux","value":6.84e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"CTIO/DECam:g","method":"V/161/zcatdr1","source":"vizier","reference":"V/161/zcatdr1","ref_year":null},{"parameter":"sed_flux","value":0.000326,"value_text":null,"unit":"Jy","err_plus":5e-06,"err_minus":5e-06,"band":"WISE:W2","method":"VII/289/dr16q","source":"vizier","reference":"VII/289/dr16q","ref_year":null},{"parameter":"sed_flux","value":0.00023,"value_text":null,"unit":"Jy","err_plus":3e-06,"err_minus":3e-06,"band":"WISE:W1","method":"VII/289/dr16q","source":"vizier","reference":"VII/289/dr16q","ref_year":null},{"parameter":"sed_flux","value":6.25e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"VII/289/dr16q","source":"vizier","reference":"VII/289/dr16q","ref_year":null},{"parameter":"sed_flux","value":5.97e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"GALEX:NUV","method":"VII/289/dr16q","source":"vizier","reference":"VII/289/dr16q","ref_year":null},{"parameter":"sed_flux","value":2.01e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"GALEX:FUV","method":"VII/289/dr16q","source":"vizier","reference":"VII/289/dr16q","ref_year":null},{"parameter":"sed_flux","value":5.63e-05,"value_text":null,"unit":"Jy","err_plus":4.2e-06,"err_minus":4.2e-06,"band":"GALEX:NUV","method":"IX/48/xgustwra","source":"vizier","reference":"IX/48/xgustwra","ref_year":null},{"parameter":"sed_flux","value":1.88e-05,"value_text":null,"unit":"Jy","err_plus":3.9e-06,"err_minus":3.9e-06,"band":"GALEX:FUV","method":"IX/48/xgustwra","source":"vizier","reference":"IX/48/xgustwra","ref_year":null},{"parameter":"sed_flux","value":7.63e-05,"value_text":null,"unit":"Jy","err_plus":2.9e-06,"err_minus":2.9e-06,"band":"Gaia:G","method":"J/ApJ/867/105/refcat2","source":"vizier","reference":"J/ApJ/867/105/refcat2","ref_year":null},{"parameter":"sed_flux","value":0.000377,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"WISE:W2","method":"J/ApJ/964/69/quaiag200","source":"vizier","reference":"J/ApJ/964/69/quaiag200","ref_year":null},{"parameter":"sed_flux","value":0.000294,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"WISE:W1","method":"J/ApJ/964/69/quaiag200","source":"vizier","reference":"J/ApJ/964/69/quaiag200","ref_year":null},{"parameter":"sed_flux","value":5.73e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"J/ApJ/964/69/quaiag200","source":"vizier","reference":"J/ApJ/964/69/quaiag200","ref_year":null},{"parameter":"sed_flux","value":0.00248,"value_text":null,"unit":"Jy","err_plus":0.00082,"err_minus":0.00082,"band":"WISE:W4","method":"J/ApJS/234/23/r90cat","source":"vizier","reference":"J/ApJS/234/23/r90cat","ref_year":null},{"parameter":"sed_flux","value":0.000606,"value_text":null,"unit":"Jy","err_plus":0.000107,"err_minus":0.000107,"band":"WISE:W3","method":"J/ApJS/234/23/r90cat","source":"vizier","reference":"J/ApJS/234/23/r90cat","ref_year":null},{"parameter":"sed_flux","value":0.000331,"value_text":null,"unit":"Jy","err_plus":1.1e-05,"err_minus":1.1e-05,"band":"WISE:W2","method":"J/ApJS/234/23/r90cat","source":"vizier","reference":"J/ApJS/234/23/r90cat","ref_year":null},{"parameter":"sed_flux","value":0.000244,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"WISE:W1","method":"J/ApJS/234/23/r90cat","source":"vizier","reference":"J/ApJS/234/23/r90cat","ref_year":null},{"parameter":"sed_flux","value":0.00248,"value_text":null,"unit":"Jy","err_plus":0.00082,"err_minus":0.00082,"band":"WISE:W4","method":"J/ApJS/234/23/c75cat","source":"vizier","reference":"J/ApJS/234/23/c75cat","ref_year":null},{"parameter":"sed_flux","value":0.000606,"value_text":null,"unit":"Jy","err_plus":0.000107,"err_minus":0.000107,"band":"WISE:W3","method":"J/ApJS/234/23/c75cat","source":"vizier","reference":"J/ApJS/234/23/c75cat","ref_year":null},{"parameter":"sed_flux","value":0.000331,"value_text":null,"unit":"Jy","err_plus":1.1e-05,"err_minus":1.1e-05,"band":"WISE:W2","method":"J/ApJS/234/23/c75cat","source":"vizier","reference":"J/ApJS/234/23/c75cat","ref_year":null},{"parameter":"sed_flux","value":0.000244,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"WISE:W1","method":"J/ApJS/234/23/c75cat","source":"vizier","reference":"J/ApJS/234/23/c75cat","ref_year":null},{"parameter":"sed_flux","value":0.000606,"value_text":null,"unit":"Jy","err_plus":0.000107,"err_minus":0.000107,"band":"WISE:W3","method":"J/ApJS/236/37/table2","source":"vizier","reference":"J/ApJS/236/37/table2","ref_year":null},{"parameter":"sed_flux","value":0.000331,"value_text":null,"unit":"Jy","err_plus":1.1e-05,"err_minus":1.1e-05,"band":"WISE:W2","method":"J/ApJS/236/37/table2","source":"vizier","reference":"J/ApJS/236/37/table2","ref_year":null},{"parameter":"sed_flux","value":0.000244,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"WISE:W1","method":"J/ApJS/236/37/table2","source":"vizier","reference":"J/ApJS/236/37/table2","ref_year":null},{"parameter":"sed_flux","value":6.28e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"J/ApJS/236/37/table2","source":"vizier","reference":"J/ApJS/236/37/table2","ref_year":null},{"parameter":"sed_flux","value":6.05e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Palomar/ZTF:r","method":"J/ApJS/249/18/table3","source":"vizier","reference":"J/ApJS/249/18/table3","ref_year":null},{"parameter":"sed_flux","value":8.18e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Palomar/ZTF:g","method":"J/ApJS/249/18/table3","source":"vizier","reference":"J/ApJS/249/18/table3","ref_year":null},{"parameter":"sed_flux","value":5.5e-05,"value_text":null,"unit":"Jy","err_plus":5.1e-06,"err_minus":5.1e-06,"band":"PAN-STARRS/PS1:y","method":"J/ApJS/271/54/table4","source":"vizier","reference":"J/ApJS/271/54/table4","ref_year":null},{"parameter":"sed_flux","value":4.29e-05,"value_text":null,"unit":"Jy","err_plus":2.4e-06,"err_minus":2.4e-06,"band":"PAN-STARRS/PS1:z","method":"J/ApJS/271/54/table4","source":"vizier","reference":"J/ApJS/271/54/table4","ref_year":null},{"parameter":"sed_flux","value":6.92e-05,"value_text":null,"unit":"Jy","err_plus":6e-07,"err_minus":6e-07,"band":"PAN-STARRS/PS1:i","method":"J/ApJS/271/54/table4","source":"vizier","reference":"J/ApJS/271/54/table4","ref_year":null},{"parameter":"sed_flux","value":5.75e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"J/ApJS/271/54/table4","source":"vizier","reference":"J/ApJS/271/54/table4","ref_year":null},{"parameter":"sed_flux","value":3.6e-05,"value_text":null,"unit":"Jy","err_plus":2.3e-06,"err_minus":2.3e-06,"band":"PAN-STARRS/PS1:r","method":"J/ApJS/271/54/table4","source":"vizier","reference":"J/ApJS/271/54/table4","ref_year":null},{"parameter":"sed_flux","value":3.63e-05,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"PAN-STARRS/PS1:g","method":"J/ApJS/271/54/table4","source":"vizier","reference":"J/ApJS/271/54/table4","ref_year":null},{"parameter":"sed_flux","value":6.28e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"J/A+A/614/A140/lqac4","source":"vizier","reference":"J/A+A/614/A140/lqac4","ref_year":null},{"parameter":"sed_flux","value":7.53e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"J/A+A/683/A112/lqac6","source":"vizier","reference":"J/A+A/683/A112/lqac6","ref_year":null},{"parameter":"sed_flux","value":3.3e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"SDSS:z","method":"J/MNRAS/450/3893/dame_qso","source":"vizier","reference":"J/MNRAS/450/3893/dame_qso","ref_year":null},{"parameter":"sed_flux","value":3.39e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"SDSS:i","method":"J/MNRAS/450/3893/dame_qso","source":"vizier","reference":"J/MNRAS/450/3893/dame_qso","ref_year":null},{"parameter":"sed_flux","value":2.07e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"SDSS:r","method":"J/MNRAS/450/3893/dame_qso","source":"vizier","reference":"J/MNRAS/450/3893/dame_qso","ref_year":null},{"parameter":"sed_flux","value":2.39e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"SDSS:g","method":"J/MNRAS/450/3893/dame_qso","source":"vizier","reference":"J/MNRAS/450/3893/dame_qso","ref_year":null},{"parameter":"sed_flux","value":1.58e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"SDSS:u","method":"J/MNRAS/450/3893/dame_qso","source":"vizier","reference":"J/MNRAS/450/3893/dame_qso","ref_year":null},{"parameter":"sed_flux","value":8.93e-05,"value_text":null,"unit":"Jy","err_plus":4.35e-05,"err_minus":4.35e-05,"band":"POSS-II:i","method":"I/305/out","source":"vizier","reference":"I/305/out","ref_year":null},{"parameter":"sed_flux","value":7.19e-05,"value_text":null,"unit":"Jy","err_plus":2.92e-05,"err_minus":2.92e-05,"band":"POSS-II:F","method":"I/305/out","source":"vizier","reference":"I/305/out","ref_year":null},{"parameter":"sed_flux","value":4.06e-05,"value_text":null,"unit":"Jy","err_plus":1.61e-05,"err_minus":1.61e-05,"band":"POSS-II:J","method":"I/305/out","source":"vizier","reference":"I/305/out","ref_year":null},{"parameter":"sed_flux","value":0.000335,"value_text":null,"unit":"Jy","err_plus":0.00013,"err_minus":0.00013,"band":"Johnson:B","method":"I/305/out","source":"vizier","reference":"I/305/out","ref_year":null},{"parameter":"sed_flux","value":6.29e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"I/337/gaia","source":"vizier","reference":"I/337/gaia","ref_year":null},{"parameter":"sed_flux","value":6.28e-05,"value_text":null,"unit":"Jy","err_plus":8e-07,"err_minus":8e-07,"band":"Gaia:G","method":"I/339/hsoy","source":"vizier","reference":"I/339/hsoy","ref_year":null},{"parameter":"sed_flux","value":6.63e-05,"value_text":null,"unit":"Jy","err_plus":2.7e-06,"err_minus":2.7e-06,"band":"GAIA/GAIA2:Grp","method":"I/345/gaia2","source":"vizier","reference":"I/345/gaia2","ref_year":null},{"parameter":"sed_flux","value":6.83e-05,"value_text":null,"unit":"Jy","err_plus":4e-07,"err_minus":4e-07,"band":"GAIA/GAIA2:G","method":"I/345/gaia2","source":"vizier","reference":"I/345/gaia2","ref_year":null},{"parameter":"sed_flux","value":7.03e-05,"value_text":null,"unit":"Jy","err_plus":2.6e-06,"err_minus":2.6e-06,"band":"GAIA/GAIA2:Gbp","method":"I/345/gaia2","source":"vizier","reference":"I/345/gaia2","ref_year":null},{"parameter":"sed_flux","value":6.38e-05,"value_text":null,"unit":"Jy","err_plus":3.6e-06,"err_minus":3.6e-06,"band":"GAIA/GAIA3:Grp","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":6.14e-05,"value_text":null,"unit":"Jy","err_plus":6e-07,"err_minus":6e-07,"band":"GAIA/GAIA3:G","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":6.62e-05,"value_text":null,"unit":"Jy","err_plus":2.4e-06,"err_minus":2.4e-06,"band":"GAIA/GAIA3:Gbp","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":0.00248,"value_text":null,"unit":"Jy","err_plus":0.00082,"err_minus":0.00082,"band":"WISE:W4","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":0.000606,"value_text":null,"unit":"Jy","err_plus":0.000107,"err_minus":0.000107,"band":"WISE:W3","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":0.000331,"value_text":null,"unit":"Jy","err_plus":1.1e-05,"err_minus":1.1e-05,"band":"WISE:W2","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":0.000244,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"WISE:W1","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":4.27e-05,"value_text":null,"unit":"Jy","err_plus":2.4e-06,"err_minus":2.4e-06,"band":"SDSS:z","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":6.94e-05,"value_text":null,"unit":"Jy","err_plus":8e-07,"err_minus":8e-07,"band":"SDSS:i","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":6e-05,"value_text":null,"unit":"Jy","err_plus":2.1e-06,"err_minus":2.1e-06,"band":"Gaia:G","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null}],"orbit":null,"exoplanet":null,"sources":[{"source":"gaia-dr3","url":"https://vizier.cds.unistra.fr/viz-bin/VizieR-S?Gaia%20DR3%201355650764206846336","fetched_at":"2026-10-02T10:49:21.931929+00:00"},{"source":"ned","url":"https://ned.ipac.caltech.edu/byname?objname=WISEA J164211.17+393837.1","fetched_at":"2026-10-02T10:49:23.080083+00:00"},{"source":"simbad","url":"https://simbad.cds.unistra.fr/simbad/sim-basic?Ident=QSO B1640+3944","fetched_at":"2026-10-02T10:49:16.937894+00:00"},{"source":"vizier","url":"https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-c=250.546388%20+39.643618&-c.rs=5","fetched_at":"2026-10-02T10:49:30.636894+00:00"}]}