{"id":2436427,"slug":"sax-j1808-4-3658","name":"SAX J1808.4-3658","domain":"deep-sky","class":"star","otype":"LXB","otype_label":"LowMassXBin","ra":272.11491666666666,"dec":-36.978861111111115,"coo_err_mas":1500.0,"coo_bibcode":"2020A&A...641A.136W","plx_mas":null,"pmra":null,"pmdec":null,"rv_kms":null,"redshift":null,"dist_pc":null,"vmag":null,"bmag":null,"gmag":null,"jmag":null,"kmag":null,"sp_type":null,"morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":1058,"simbad_oid":4089080,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":null,"host_object_id":null,"depth":1,"deep_at":"2026-09-12T11:24:06.150137+00:00","views":18,"first_seen":"2026-08-14T16:51:33.286207+00:00","updated_at":"2026-08-23T03:29:16.262629+00:00","identifiers":["1SXPS J180827.6-365843","2SXPS J180827.5-365842","2XMM J180827.7-365841","4XMM J180827.5-365843","[GSG99] J180827.6-365843.9","INTREF 881","PBC J1808.3-3656","PSR J1808-3658","[RCM98] J180827.5-365842","SAX J1808.4-3658","SWIFT J1808.5-3655","SwXF4 J180827.6-365842","V* V4580 Sgr","XTE J1808-369"],"measurements":[{"parameter":"sed_flux","value":0.000515,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:H","method":"I/297/out","source":"vizier","reference":"I/297/out","ref_year":null},{"parameter":"sed_flux","value":0.000543,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:J","method":"I/297/out","source":"vizier","reference":"I/297/out","ref_year":null},{"parameter":"sed_flux","value":0.000349,"value_text":null,"unit":"Jy","err_plus":0.000163,"err_minus":0.000163,"band":"POSS-II:i","method":"I/305/out","source":"vizier","reference":"I/305/out","ref_year":null},{"parameter":"sed_flux","value":0.000227,"value_text":null,"unit":"Jy","err_plus":0.000104,"err_minus":0.000104,"band":"POSS-II:F","method":"I/305/out","source":"vizier","reference":"I/305/out","ref_year":null},{"parameter":"sed_flux","value":0.000135,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:Ks","method":"I/317/sample","source":"vizier","reference":"I/317/sample","ref_year":null},{"parameter":"sed_flux","value":0.000515,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:H","method":"I/317/sample","source":"vizier","reference":"I/317/sample","ref_year":null},{"parameter":"sed_flux","value":0.000543,"value_text":null,"unit":"Jy","err_plus":5.1e-05,"err_minus":5.1e-05,"band":"2MASS:J","method":"I/317/sample","source":"vizier","reference":"I/317/sample","ref_year":null},{"parameter":"sed_flux","value":0.000135,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:Ks","method":"I/319/xpm","source":"vizier","reference":"I/319/xpm","ref_year":null},{"parameter":"sed_flux","value":0.000515,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:H","method":"I/319/xpm","source":"vizier","reference":"I/319/xpm","ref_year":null},{"parameter":"sed_flux","value":0.000543,"value_text":null,"unit":"Jy","err_plus":5.1e-05,"err_minus":5.1e-05,"band":"2MASS:J","method":"I/319/xpm","source":"vizier","reference":"I/319/xpm","ref_year":null},{"parameter":"sed_flux","value":0.000233,"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":0.000515,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:H","method":"I/339/hsoy","source":"vizier","reference":"I/339/hsoy","ref_year":null},{"parameter":"sed_flux","value":0.000543,"value_text":null,"unit":"Jy","err_plus":5.1e-05,"err_minus":5.1e-05,"band":"2MASS:J","method":"I/339/hsoy","source":"vizier","reference":"I/339/hsoy","ref_year":null},{"parameter":"sed_flux","value":0.000233,"value_text":null,"unit":"Jy","err_plus":2e-06,"err_minus":2e-06,"band":"Gaia:G","method":"I/339/hsoy","source":"vizier","reference":"I/339/hsoy","ref_year":null},{"parameter":"sed_flux","value":0.000423,"value_text":null,"unit":"Jy","err_plus":8e-06,"err_minus":8e-06,"band":"GAIA/GAIA2:Grp","method":"I/345/gaia2","source":"vizier","reference":"I/345/gaia2","ref_year":null},{"parameter":"sed_flux","value":0.000245,"value_text":null,"unit":"Jy","err_plus":2e-06,"err_minus":2e-06,"band":"GAIA/GAIA2:G","method":"I/345/gaia2","source":"vizier","reference":"I/345/gaia2","ref_year":null},{"parameter":"sed_flux","value":0.000226,"value_text":null,"unit":"Jy","err_plus":2e-06,"err_minus":2e-06,"band":"GAIA/GAIA2:Gbp","method":"I/345/gaia2","source":"vizier","reference":"I/345/gaia2","ref_year":null},{"parameter":"sed_flux","value":0.000399,"value_text":null,"unit":"Jy","err_plus":3e-06,"err_minus":3e-06,"band":"GAIA/GAIA3:Grp","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":0.000224,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"GAIA/GAIA3:G","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":0.000219,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"GAIA/GAIA3:Gbp","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":1.91e-05,"value_text":null,"unit":"Jy","err_plus":4e-07,"err_minus":4e-07,"band":"Gaia:G","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":0.000399,"value_text":null,"unit":"Jy","err_plus":3e-06,"err_minus":3e-06,"band":"GAIA/GAIA3:Grp","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":0.000224,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"GAIA/GAIA3:G","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":0.000219,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"GAIA/GAIA3:Gbp","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":0.00013,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Johnson:K","method":"II/246/out","source":"vizier","reference":"II/246/out","ref_year":null},{"parameter":"sed_flux","value":0.00051,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Johnson:H","method":"II/246/out","source":"vizier","reference":"II/246/out","ref_year":null},{"parameter":"sed_flux","value":0.000549,"value_text":null,"unit":"Jy","err_plus":7.4e-05,"err_minus":7.4e-05,"band":"Johnson:J","method":"II/246/out","source":"vizier","reference":"II/246/out","ref_year":null},{"parameter":"sed_flux","value":4.99e-05,"value_text":null,"unit":"Jy","err_plus":1.34e-05,"err_minus":1.34e-05,"band":"VISTA:Ks","method":"II/337/vvv1","source":"vizier","reference":"II/337/vvv1","ref_year":null},{"parameter":"sed_flux","value":7.6e-05,"value_text":null,"unit":"Jy","err_plus":9.2e-06,"err_minus":9.2e-06,"band":"VISTA:H","method":"II/337/vvv1","source":"vizier","reference":"II/337/vvv1","ref_year":null},{"parameter":"sed_flux","value":7.97e-05,"value_text":null,"unit":"Jy","err_plus":5.5e-06,"err_minus":5.5e-06,"band":"VISTA:J","method":"II/337/vvv1","source":"vizier","reference":"II/337/vvv1","ref_year":null},{"parameter":"sed_flux","value":9.27e-05,"value_text":null,"unit":"Jy","err_plus":7.3e-06,"err_minus":7.3e-06,"band":"VISTA:Y","method":"II/337/vvv1","source":"vizier","reference":"II/337/vvv1","ref_year":null},{"parameter":"sed_flux","value":0.000448,"value_text":null,"unit":"Jy","err_plus":6e-06,"err_minus":6e-06,"band":"VISTA:Z","method":"II/337/vvv1","source":"vizier","reference":"II/337/vvv1","ref_year":null},{"parameter":"sed_flux","value":0.000143,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"UVOT:V","method":"II/339/uvotssc1","source":"vizier","reference":"II/339/uvotssc1","ref_year":null},{"parameter":"sed_flux","value":0.000195,"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":0.000424,"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":0.000219,"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":0.00062,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"UVOT:B","method":"II/339/uvotssc1","source":"vizier","reference":"II/339/uvotssc1","ref_year":null},{"parameter":"sed_flux","value":0.0002,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"UVOT:UVM2","method":"II/339/uvotssc1","source":"vizier","reference":"II/339/uvotssc1","ref_year":null},{"parameter":"sed_flux","value":0.000336,"value_text":null,"unit":"Jy","err_plus":1.4e-05,"err_minus":1.4e-05,"band":"VISTA:Ks","method":"II/348/vvv2","source":"vizier","reference":"II/348/vvv2","ref_year":null},{"parameter":"sed_flux","value":0.000478,"value_text":null,"unit":"Jy","err_plus":1e-05,"err_minus":1e-05,"band":"VISTA:H","method":"II/348/vvv2","source":"vizier","reference":"II/348/vvv2","ref_year":null},{"parameter":"sed_flux","value":0.00051,"value_text":null,"unit":"Jy","err_plus":6e-06,"err_minus":6e-06,"band":"VISTA:J","method":"II/348/vvv2","source":"vizier","reference":"II/348/vvv2","ref_year":null},{"parameter":"sed_flux","value":0.00052,"value_text":null,"unit":"Jy","err_plus":8e-06,"err_minus":8e-06,"band":"VISTA:Y","method":"II/348/vvv2","source":"vizier","reference":"II/348/vvv2","ref_year":null},{"parameter":"sed_flux","value":0.000448,"value_text":null,"unit":"Jy","err_plus":6e-06,"err_minus":6e-06,"band":"VISTA:Z","method":"II/348/vvv2","source":"vizier","reference":"II/348/vvv2","ref_year":null},{"parameter":"sed_flux","value":7.34e-05,"value_text":null,"unit":"Jy","err_plus":6.6e-06,"err_minus":6.6e-06,"band":"Johnson:K","method":"II/364/virac","source":"vizier","reference":"II/364/virac","ref_year":null},{"parameter":"sed_flux","value":0.000116,"value_text":null,"unit":"Jy","err_plus":9e-06,"err_minus":9e-06,"band":"WISE:W2","method":"II/365/catwise","source":"vizier","reference":"II/365/catwise","ref_year":null},{"parameter":"sed_flux","value":0.000222,"value_text":null,"unit":"Jy","err_plus":5e-06,"err_minus":5e-06,"band":"WISE:W1","method":"II/365/catwise","source":"vizier","reference":"II/365/catwise","ref_year":null},{"parameter":"sed_flux","value":7.55e-05,"value_text":null,"unit":"Jy","err_plus":1.35e-05,"err_minus":1.35e-05,"band":"VISTA:Ks","method":"II/376/vvv4","source":"vizier","reference":"II/376/vvv4","ref_year":null},{"parameter":"sed_flux","value":0.000113,"value_text":null,"unit":"Jy","err_plus":9e-06,"err_minus":9e-06,"band":"VISTA:H","method":"II/376/vvv4","source":"vizier","reference":"II/376/vvv4","ref_year":null},{"parameter":"sed_flux","value":0.00013,"value_text":null,"unit":"Jy","err_plus":6e-06,"err_minus":6e-06,"band":"VISTA:J","method":"II/376/vvv4","source":"vizier","reference":"II/376/vvv4","ref_year":null},{"parameter":"sed_flux","value":0.000143,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"VISTA:Y","method":"II/376/vvv4","source":"vizier","reference":"II/376/vvv4","ref_year":null},{"parameter":"sed_flux","value":0.000132,"value_text":null,"unit":"Jy","err_plus":5e-06,"err_minus":5e-06,"band":"VISTA:Z","method":"II/376/vvv4","source":"vizier","reference":"II/376/vvv4","ref_year":null},{"parameter":"sed_flux","value":0.000114,"value_text":null,"unit":"Jy","err_plus":1e-06,"err_minus":1e-06,"band":"XMM-OT:UVW1","method":"II/378/xmmom6s","source":"vizier","reference":"II/378/xmmom6s","ref_year":null},{"parameter":"sed_flux","value":0.000113,"value_text":null,"unit":"Jy","err_plus":1.8e-05,"err_minus":1.8e-05,"band":"SkyMapper/SkyMapper:z","method":"II/379/smssdr4","source":"vizier","reference":"II/379/smssdr4","ref_year":null},{"parameter":"sed_flux","value":0.000129,"value_text":null,"unit":"Jy","err_plus":1.5e-05,"err_minus":1.5e-05,"band":"SkyMapper/SkyMapper:i","method":"II/379/smssdr4","source":"vizier","reference":"II/379/smssdr4","ref_year":null},{"parameter":"sed_flux","value":0.000149,"value_text":null,"unit":"Jy","err_plus":1.4e-05,"err_minus":1.4e-05,"band":"SkyMapper/SkyMapper:r","method":"II/379/smssdr4","source":"vizier","reference":"II/379/smssdr4","ref_year":null},{"parameter":"sed_flux","value":0.000134,"value_text":null,"unit":"Jy","err_plus":1.1e-05,"err_minus":1.1e-05,"band":"SkyMapper/SkyMapper:g","method":"II/379/smssdr4","source":"vizier","reference":"II/379/smssdr4","ref_year":null},{"parameter":"sed_flux","value":8.73e-05,"value_text":null,"unit":"Jy","err_plus":9.5e-06,"err_minus":9.5e-06,"band":"VISTA:Ks","method":"II/387/virac2","source":"vizier","reference":"II/387/virac2","ref_year":null},{"parameter":"sed_flux","value":0.000103,"value_text":null,"unit":"Jy","err_plus":1.2e-05,"err_minus":1.2e-05,"band":"VISTA:H","method":"II/387/virac2","source":"vizier","reference":"II/387/virac2","ref_year":null},{"parameter":"sed_flux","value":0.000115,"value_text":null,"unit":"Jy","err_plus":7e-06,"err_minus":7e-06,"band":"VISTA:J","method":"II/387/virac2","source":"vizier","reference":"II/387/virac2","ref_year":null},{"parameter":"sed_flux","value":0.000137,"value_text":null,"unit":"Jy","err_plus":5e-06,"err_minus":5e-06,"band":"VISTA:Y","method":"II/387/virac2","source":"vizier","reference":"II/387/virac2","ref_year":null},{"parameter":"sed_flux","value":0.000123,"value_text":null,"unit":"Jy","err_plus":3e-06,"err_minus":3e-06,"band":"VISTA:Z","method":"II/387/virac2","source":"vizier","reference":"II/387/virac2","ref_year":null},{"parameter":"sed_flux","value":0.000135,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:Ks","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":0.00051,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Johnson:H","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":0.000555,"value_text":null,"unit":"Jy","err_plus":5.2e-05,"err_minus":5.2e-05,"band":"Johnson:J","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":0.000224,"value_text":null,"unit":"Jy","err_plus":2e-06,"err_minus":2e-06,"band":"Gaia:G","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":0.000225,"value_text":null,"unit":"Jy","err_plus":1e-05,"err_minus":1e-05,"band":"Johnson:V","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":0.000223,"value_text":null,"unit":"Jy","err_plus":3.1e-05,"err_minus":3.1e-05,"band":"Johnson:B","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":0.000135,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:Ks","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":0.00051,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Johnson:H","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":0.000555,"value_text":null,"unit":"Jy","err_plus":5.2e-05,"err_minus":5.2e-05,"band":"Johnson:J","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":0.000224,"value_text":null,"unit":"Jy","err_plus":2e-06,"err_minus":2e-06,"band":"Gaia:G","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":0.000225,"value_text":null,"unit":"Jy","err_plus":1e-05,"err_minus":1e-05,"band":"Johnson:V","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":0.000223,"value_text":null,"unit":"Jy","err_plus":3.1e-05,"err_minus":3.1e-05,"band":"Johnson:B","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":0.000176,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"VI/137/gum_mw","source":"vizier","reference":"VI/137/gum_mw","ref_year":null},{"parameter":"sed_flux","value":0.000429,"value_text":null,"unit":"Jy","err_plus":4.4e-05,"err_minus":4.4e-05,"band":"Cousins:I","method":"B/denis/denis","source":"vizier","reference":"B/denis/denis","ref_year":null},{"parameter":"sed_flux","value":0.000515,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:H","method":"J/ApJ/867/105/refcat2","source":"vizier","reference":"J/ApJ/867/105/refcat2","ref_year":null},{"parameter":"sed_flux","value":0.000543,"value_text":null,"unit":"Jy","err_plus":5e-05,"err_minus":5e-05,"band":"2MASS:J","method":"J/ApJ/867/105/refcat2","source":"vizier","reference":"J/ApJ/867/105/refcat2","ref_year":null},{"parameter":"sed_flux","value":0.000487,"value_text":null,"unit":"Jy","err_plus":9e-06,"err_minus":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":0.001,"value_text":null,"unit":"Jy","err_plus":4e-05,"err_minus":4e-05,"band":"Johnson:H","method":"J/A+A/675/A199/lmxbcat","source":"vizier","reference":"J/A+A/675/A199/lmxbcat","ref_year":null}],"orbit":null,"exoplanet":null,"sources":[{"source":"simbad","url":"https://simbad.cds.unistra.fr/simbad/sim-basic?Ident=SAX J1808.4-3658","fetched_at":"2026-09-12T11:24:00.663143+00:00"},{"source":"vizier","url":"https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-c=272.114917%20-36.978861&-c.rs=5","fetched_at":"2026-09-12T11:24:06.148877+00:00"}]}