{"id":1933537,"slug":"rx-j0042-2-4120","name":"RX J0042.2+4120","domain":"deep-sky","class":"source","otype":"X","otype_label":"X","ra":10.564283333333332,"dec":41.34229722222223,"coo_err_mas":300.0,"coo_bibcode":"2002ApJ...577..738K","plx_mas":null,"pmra":null,"pmdec":null,"rv_kms":-302.2,"redshift":-0.0010075232,"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":12,"simbad_oid":1557158,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":null,"host_object_id":null,"depth":1,"deep_at":"2026-09-26T08:43:32.710674+00:00","views":33,"first_seen":"2026-08-14T16:50:33.190276+00:00","updated_at":"2026-08-14T16:50:33.190276+00:00","identifiers":["2XMM J004215.4+412031","CXOM31 J004215.4+412032","CXOM31 J004215.5+412031","[FMZ2005] 16","[HPH2013] 37","[K2002] J004215.53+412031.9","[KGP2002] r3-48","[PFH2005] 237","[PFJ93] 11","RX J004216.1+412032","RX J0042.2+4120","[SHL2001] 148","[SHP97] 152","[SPH2011] 838","XMMM31 J004215.4+412030"],"measurements":[{"parameter":"radial_velocity","value":-302.2,"value_text":null,"unit":"km/s","err_plus":24.4,"err_minus":24.4,"band":null,"method":"v","source":"simbad","reference":"2013ApJ...769...10J","ref_year":2013},{"parameter":"sed_flux","value":1.84e-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":2.58e-05,"value_text":null,"unit":"Jy","err_plus":5.4e-06,"err_minus":5.4e-06,"band":"GAIA/GAIA3:Grp","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":1.95e-05,"value_text":null,"unit":"Jy","err_plus":2e-07,"err_minus":2e-07,"band":"GAIA/GAIA3:G","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":1.73e-05,"value_text":null,"unit":"Jy","err_plus":2.7e-06,"err_minus":2.7e-06,"band":"GAIA/GAIA3:Gbp","method":"I/350/gaiaedr3","source":"vizier","reference":"I/350/gaiaedr3","ref_year":null},{"parameter":"sed_flux","value":8.17e-05,"value_text":null,"unit":"Jy","err_plus":1.4e-05,"err_minus":1.4e-05,"band":"SDSS:i","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":1.8e-05,"value_text":null,"unit":"Jy","err_plus":7e-07,"err_minus":7e-07,"band":"SDSS:r","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":1.52e-05,"value_text":null,"unit":"Jy","err_plus":1.2e-06,"err_minus":1.2e-06,"band":"SDSS:g","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":4.12e-05,"value_text":null,"unit":"Jy","err_plus":1.3e-06,"err_minus":1.3e-06,"band":"SDSS:z","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":1.68e-05,"value_text":null,"unit":"Jy","err_plus":3e-07,"err_minus":3e-07,"band":"Gaia:G","method":"I/353/gsc242","source":"vizier","reference":"I/353/gsc242","ref_year":null},{"parameter":"sed_flux","value":2.58e-05,"value_text":null,"unit":"Jy","err_plus":5.4e-06,"err_minus":5.4e-06,"band":"GAIA/GAIA3:Grp","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":1.95e-05,"value_text":null,"unit":"Jy","err_plus":2e-07,"err_minus":2e-07,"band":"GAIA/GAIA3:G","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":1.73e-05,"value_text":null,"unit":"Jy","err_plus":2.7e-06,"err_minus":2.7e-06,"band":"GAIA/GAIA3:Gbp","method":"I/355/gaiadr3","source":"vizier","reference":"I/355/gaiadr3","ref_year":null},{"parameter":"sed_flux","value":3.45e-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":3.6e-05,"value_text":null,"unit":"Jy","err_plus":6.3e-06,"err_minus":6.3e-06,"band":":=48nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":5.55e-05,"value_text":null,"unit":"Jy","err_plus":8.2e-06,"err_minus":8.2e-06,"band":":=39nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":0.000189,"value_text":null,"unit":"Jy","err_plus":3.3e-05,"err_minus":3.3e-05,"band":":=36nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":5.01e-05,"value_text":null,"unit":"Jy","err_plus":7.9e-06,"err_minus":7.9e-06,"band":":=34nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":4.29e-05,"value_text":null,"unit":"Jy","err_plus":7.5e-06,"err_minus":7.5e-06,"band":":=32nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":7.24e-05,"value_text":null,"unit":"Jy","err_plus":9.4e-06,"err_minus":9.4e-06,"band":":=31nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":8.55e-05,"value_text":null,"unit":"Jy","err_plus":1.58e-05,"err_minus":1.58e-05,"band":":=30nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":0.000166,"value_text":null,"unit":"Jy","err_plus":1.5e-05,"err_minus":1.5e-05,"band":":=26nm","method":"II/262/batc","source":"vizier","reference":"II/262/batc","ref_year":null},{"parameter":"sed_flux","value":0.00041,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:Ks","method":"II/281/2mass6x","source":"vizier","reference":"II/281/2mass6x","ref_year":null},{"parameter":"sed_flux","value":0.000327,"value_text":null,"unit":"Jy","err_plus":4.6e-05,"err_minus":4.6e-05,"band":"2MASS:H","method":"II/281/2mass6x","source":"vizier","reference":"II/281/2mass6x","ref_year":null},{"parameter":"sed_flux","value":0.000313,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"2MASS:J","method":"II/281/2mass6x","source":"vizier","reference":"II/281/2mass6x","ref_year":null},{"parameter":"sed_flux","value":4.1e-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":4.65e-06,"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":2.42e-05,"value_text":null,"unit":"Jy","err_plus":3.9e-06,"err_minus":3.9e-06,"band":"XMM-OT:V","method":"II/340/xmmom2_1","source":"vizier","reference":"II/340/xmmom2_1","ref_year":null},{"parameter":"sed_flux","value":6.66e-06,"value_text":null,"unit":"Jy","err_plus":1.07e-06,"err_minus":1.07e-06,"band":"XMM-OT:UVW1","method":"II/340/xmmom2_1","source":"vizier","reference":"II/340/xmmom2_1","ref_year":null},{"parameter":"sed_flux","value":1.9e-05,"value_text":null,"unit":"Jy","err_plus":1.5e-06,"err_minus":1.5e-06,"band":"XMM-OT:U","method":"II/340/xmmom2_1","source":"vizier","reference":"II/340/xmmom2_1","ref_year":null},{"parameter":"sed_flux","value":3.46e-05,"value_text":null,"unit":"Jy","err_plus":4.4e-06,"err_minus":4.4e-06,"band":"PAN-STARRS/PS1:i","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":1.93e-05,"value_text":null,"unit":"Jy","err_plus":3.5e-06,"err_minus":3.5e-06,"band":"PAN-STARRS/PS1:r","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":1.51e-05,"value_text":null,"unit":"Jy","err_plus":1.2e-06,"err_minus":1.2e-06,"band":"PAN-STARRS/PS1:g","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":4.12e-05,"value_text":null,"unit":"Jy","err_plus":1.3e-06,"err_minus":1.3e-06,"band":"PAN-STARRS/PS1:z","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":5.44e-05,"value_text":null,"unit":"Jy","err_plus":4.3e-06,"err_minus":4.3e-06,"band":"PAN-STARRS/PS1:y","method":"II/349/ps1","source":"vizier","reference":"II/349/ps1","ref_year":null},{"parameter":"sed_flux","value":7.54e-06,"value_text":null,"unit":"Jy","err_plus":1.95e-06,"err_minus":1.95e-06,"band":"XMM-OT:UVW1","method":"II/356/xmmom41s","source":"vizier","reference":"II/356/xmmom41s","ref_year":null},{"parameter":"sed_flux","value":2.02e-05,"value_text":null,"unit":"Jy","err_plus":1.5e-06,"err_minus":1.5e-06,"band":"XMM-OT:U","method":"II/356/xmmom41s","source":"vizier","reference":"II/356/xmmom41s","ref_year":null},{"parameter":"sed_flux","value":0.000151,"value_text":null,"unit":"Jy","err_plus":1.7e-05,"err_minus":1.7e-05,"band":"WISE:W2","method":"II/365/catwise","source":"vizier","reference":"II/365/catwise","ref_year":null},{"parameter":"sed_flux","value":0.000963,"value_text":null,"unit":"Jy","err_plus":3.6e-05,"err_minus":3.6e-05,"band":"WISE:W1","method":"II/365/catwise","source":"vizier","reference":"II/365/catwise","ref_year":null},{"parameter":"sed_flux","value":7.51e-06,"value_text":null,"unit":"Jy","err_plus":1.95e-06,"err_minus":1.95e-06,"band":"XMM-OT:UVW1","method":"II/370/xmmom5s","source":"vizier","reference":"II/370/xmmom5s","ref_year":null},{"parameter":"sed_flux","value":1.89e-05,"value_text":null,"unit":"Jy","err_plus":1.4e-06,"err_minus":1.4e-06,"band":"XMM-OT:U","method":"II/370/xmmom5s","source":"vizier","reference":"II/370/xmmom5s","ref_year":null},{"parameter":"sed_flux","value":7.58e-06,"value_text":null,"unit":"Jy","err_plus":1.95e-06,"err_minus":1.95e-06,"band":"XMM-OT:UVW1","method":"II/378/xmmom6s","source":"vizier","reference":"II/378/xmmom6s","ref_year":null},{"parameter":"sed_flux","value":1.88e-05,"value_text":null,"unit":"Jy","err_plus":1.5e-06,"err_minus":1.5e-06,"band":"XMM-OT:U","method":"II/378/xmmom6s","source":"vizier","reference":"II/378/xmmom6s","ref_year":null},{"parameter":"sed_flux","value":8.15e-05,"value_text":null,"unit":"Jy","err_plus":1.4e-05,"err_minus":1.4e-05,"band":"PAN-STARRS/PS1:i","method":"II/389/ps1_dr2","source":"vizier","reference":"II/389/ps1_dr2","ref_year":null},{"parameter":"sed_flux","value":1.79e-05,"value_text":null,"unit":"Jy","err_plus":8e-07,"err_minus":8e-07,"band":"PAN-STARRS/PS1:r","method":"II/389/ps1_dr2","source":"vizier","reference":"II/389/ps1_dr2","ref_year":null},{"parameter":"sed_flux","value":1.51e-05,"value_text":null,"unit":"Jy","err_plus":1.2e-06,"err_minus":1.2e-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":5.44e-05,"value_text":null,"unit":"Jy","err_plus":5.4e-06,"err_minus":5.4e-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":4.12e-05,"value_text":null,"unit":"Jy","err_plus":1.3e-06,"err_minus":1.3e-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":1.68e-05,"value_text":null,"unit":"Jy","err_plus":3e-07,"err_minus":3e-07,"band":"Gaia:G","method":"IV/38/tic","source":"vizier","reference":"IV/38/tic","ref_year":null},{"parameter":"sed_flux","value":1.68e-05,"value_text":null,"unit":"Jy","err_plus":3e-07,"err_minus":3e-07,"band":"Gaia:G","method":"IV/39/tic82","source":"vizier","reference":"IV/39/tic82","ref_year":null},{"parameter":"sed_flux","value":0.000891,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Spitzer/MIPS:24","method":"J/ApJ/687/230/table4","source":"vizier","reference":"J/ApJ/687/230/table4","ref_year":null},{"parameter":"sed_flux","value":0.00075,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Spitzer/IRAC:8.0","method":"J/ApJ/687/230/table4","source":"vizier","reference":"J/ApJ/687/230/table4","ref_year":null},{"parameter":"sed_flux","value":0.000502,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Spitzer/IRAC:5.8","method":"J/ApJ/687/230/table4","source":"vizier","reference":"J/ApJ/687/230/table4","ref_year":null},{"parameter":"sed_flux","value":0.000269,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Spitzer/IRAC:4.5","method":"J/ApJ/687/230/table4","source":"vizier","reference":"J/ApJ/687/230/table4","ref_year":null},{"parameter":"sed_flux","value":0.00017,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Spitzer/IRAC:3.6","method":"J/ApJ/687/230/table4","source":"vizier","reference":"J/ApJ/687/230/table4","ref_year":null},{"parameter":"sed_flux","value":0.000866,"value_text":null,"unit":"Jy","err_plus":1.6e-05,"err_minus":1.6e-05,"band":"Spitzer/MIPS:24","method":"J/ApJS/228/5/sources","source":"vizier","reference":"J/ApJS/228/5/sources","ref_year":null},{"parameter":"sed_flux","value":0.00046,"value_text":null,"unit":"Jy","err_plus":2.5e-05,"err_minus":2.5e-05,"band":"Spitzer/IRAC:8.0","method":"J/ApJS/228/5/sources","source":"vizier","reference":"J/ApJS/228/5/sources","ref_year":null},{"parameter":"sed_flux","value":0.000338,"value_text":null,"unit":"Jy","err_plus":9e-06,"err_minus":9e-06,"band":"Spitzer/IRAC:5.8","method":"J/ApJS/228/5/sources","source":"vizier","reference":"J/ApJS/228/5/sources","ref_year":null},{"parameter":"sed_flux","value":0.000226,"value_text":null,"unit":"Jy","err_plus":1.5e-05,"err_minus":1.5e-05,"band":"Spitzer/IRAC:4.5","method":"J/ApJS/228/5/sources","source":"vizier","reference":"J/ApJS/228/5/sources","ref_year":null},{"parameter":"sed_flux","value":0.00018,"value_text":null,"unit":"Jy","err_plus":8e-06,"err_minus":8e-06,"band":"Spitzer/IRAC:3.6","method":"J/ApJS/228/5/sources","source":"vizier","reference":"J/ApJS/228/5/sources","ref_year":null},{"parameter":"sed_flux","value":1.82e-05,"value_text":null,"unit":"Jy","err_plus":null,"err_minus":null,"band":"Gaia:G","method":"J/A+A/709/A218/tablea2","source":"vizier","reference":"J/A+A/709/A218/tablea2","ref_year":null},{"parameter":"sed_flux","value":6.27e-06,"value_text":null,"unit":"Jy","err_plus":3.3e-07,"err_minus":3.3e-07,"band":"Johnson:V","method":"J/AJ/131/2478/table4","source":"vizier","reference":"J/AJ/131/2478/table4","ref_year":null},{"parameter":"sed_flux","value":6.27e-06,"value_text":null,"unit":"Jy","err_plus":3.3e-07,"err_minus":3.3e-07,"band":"Johnson:V","method":"J/AJ/152/62/catalog","source":"vizier","reference":"J/AJ/152/62/catalog","ref_year":null},{"parameter":"sed_flux","value":9.62e-05,"value_text":null,"unit":"Jy","err_plus":6e-06,"err_minus":6e-06,"band":"Johnson:K","method":"J/AJ/161/79/table3","source":"vizier","reference":"J/AJ/161/79/table3","ref_year":null}],"orbit":null,"exoplanet":null,"sources":[{"source":"simbad","url":"https://simbad.cds.unistra.fr/simbad/sim-basic?Ident=RX J0042.2+4120","fetched_at":"2026-09-26T08:43:23.817029+00:00"},{"source":"vizier","url":"https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-c=10.564283%20+41.342297&-c.rs=5","fetched_at":"2026-09-26T08:43:32.700430+00:00"}]}