Tiers and Merge Methods

• spec_class: Spectroscopic classification
• SED_class: SED-fitting classification
• xray_class: X-ray morphology [point/extended]
• image_class: Optical image morphology
• gen_class: General/catalog-level classification

Each source can have classifications in up to 5 tiers. The best_class is selected by priority:
spec_class > SED_class > xray_class > image_class > gen_class.

Pipeline Storage Variables

• tier_all — JSON array of all classification values for that source
• tier_origin — JSON array of catalog IDs contributing each value
• tier_sub_all — JSON array of finer sub-classifications (e.g. "sy1.5", "bllac"), for every tier EXCEPT gen_class, which has no sub-classification column. best_class also carries a best_class_sub_all.

The lists below are the raw strings and numeric codes found in the input catalogs that we map to each classification label. Parentheses are kept only around numeric codes, to identify the catalog they come from.

type1

BLAGN, BROADL, Seyfert_1, sy1, nlsy1, NLS1, nls1, Sy1.2, Sy1/QSO, Sy1.2/QSO, Sy1 LINER, nl seyfert 1, seyfert type 1, T1, BLA, BLAGN1, SeyferI, AGN1, broadline, agn_broadline, starburst_broadline, bl-agn, bl-agn?

type2

NLAGN, Seyfert_2, Sy1.5, Sy1.5-1.8, Sy1.9, Sy2, Sy2 candidate, NLA, NLAGN2, SeyferII, AGN2, AGNb, AGNb?, K01, K03, QSO-2, QSO RADIO QUIET TYPE 2, SEYFERT RADIO LOUD/QUIET TYPE 2, nl-agn, nl-agn?, etg+sey2, 2SLAQ_NLQ, radio galaxy/type2, Radio galaxy/type2

generic_agn

QSO, AGN, Quasar, LINER, BAL QSO, sdssqso, qsodr1, hiz_qso, Beamed AGN, Unknown AGN, AGNe, AGNe?, OVV, SyG, LIN, redQSO, eAGN-ALG, DLA, a, aa, ae, aae, aeb, sey, qso(ba, s_bal, x_bal, w_l, myst, Q?, AG?, non-BAL QSO, BAL QSO, FeLoBAL QSO, quasar+other, quasar + galaxy, composite, composi, Composite, COMPOSITE, Hotspot, hotspot, etg+broadmg, Etg+broadmg, 2cpart_candidates, b'K01', b'K03'

• Numeric codes: 3.0 (cl_dart.fits), 5.0 (zphClass_xxl1000a), 4.0 (zphClass_xxl1000a), 1.5 (Type_BASS_agns), 60.0/70.0 (Class_BAT-105M), 0 (fe_csc2master → point), 0.0 (PLIKE_eRASS1_ctp → point source), 1/1.0 (exgal_eRASS1_ctp → extragalactic), -2.0 (Clsp_C-COSM → broad emission line object, z unreliable), 22212/22213/23212/23213/32212/32213/33212 (CLASS_XSERVS), 1 (AGN_FLAG_wcdfs), 2.0/3.0 (CTP_CLASS_eFEDS)

blazar

BL Lac, BLLAC, BLL, FSRQ, Blazar, BL Lac Candidate, BL Lac-galaxy dominated, Blazar Uncertain type, QSO RLoud flat radio sp., Bla, bla, BL?, Bz?, bllac?, LSP, HSP, ISP, bll, fsrq

• Numeric codes: 80.0 (Class_BAT-105M)

dual/merger

Dual_AGN, GPair, PaG, quasar pair, QSO pair, Gal. int., agn_gxypair, agnpair, gxypair, dualagn, Interacting Galaxies, interacting galaxies

galaxy

G, Galaxy, GALAXY, NELG, Emission line galaxy, post-starburst galaxy, Starburst galaxy, RADIO GALAXY, SPIRAL GALAXY, E, E/S0, S0, SB0, EmG, SF, SF?, SB, Abs, abs, GAL, GALs, gals, ELG, ALG, alg, alg?, PoG, GiC, BiC, GiG, GiP, rG, H2G, LSB, bCG, SBG, EmLS, starforming, star forming, etg, etg+[oii], etg+fel, hiz-lae, hiz-lae?, elg?, etg?, dr6_galaxy, nelg?, 2qz_nelg, 2slaq_nelg, 2qz_gal, e, e?, e+oii, e+oii?, starburst, starburst galaxy, sf?, gal?, gxy, gxy?, xbong, XBONG, galaxy in group of galaxies, o3

cluster

GClstr, GGroup, Galaxy Cluster, Compact group of gal, CLUSTER OF GALAXIES, COMPACT GROUP OF GALAXIES, Gal. cluster, Gal. group, SCG, ClG, GrG, CGG, Clus, GxyC, gxyc, b'ClG', b'GinCl', b'GroupG', b'DSS_GCcand'

• Numeric codes: 3.0 (Cl_2slaqqso), 3.0 (Clph_C-COSM), 30.0/130.0/140.0 (Class_BAT), 1 (fe_csc2master → extended), 1.0 (PLIKE_eRASS1_ctp → extended)

star

*, star, Star, STAR, stars, CV, HMXB, LMXB, Pulsar, SNR, Symbiotic star, nova, nov, Nov, xrb, STA, S, wd(da), wd(db), WD*, V*, BY*, RS*, RR*, Ce*, Mi*, star(A1..O9), star(DA), star(DB), Pl, PN, GlC, GlCl, OpC, Cl*, GLOBULAR CLUSTER OPEN STAR CLUSTER, Em*, Pe*, HB*, Y*O, Ae*, Be*, BS*, RG*, AB*, C*, S*, sg*, s*r, s*y, s*b, HS*, pA*, LM*, BD*, N*, OH*, TT*, WR*, PM*, HV*, Ir*, Or*, Er*, RC*, Ro*, a2*, Psr, SX*, LP*, SN*, su*

• Numeric codes: 6.0 (cl_dart.fits), 6.0 (Cl_2slaqqso), 5.0 (Clph_C-COSM → star), 0.0 (Clsp_C-COSM → star), 0/0.0 (exgal_eRASS1_ctp → not extragalactic), 90/100/110/120/150/160/170/180/190/200 (Class_BAT-105M)

lens_system

G_Lens, Q_Lens, GravLensSystem, Candidate_LensSystem, LensedImage, lens, NIQ, grv, Lev, LS?, Le?, LI?, gLe, gLS, GWE, LeI, LeG, LeQ, single QSO, SDSS lens, known lens, QSO pair, QSO+galaxy, QSO+star, QSO+unknown(not QSO)

unknown

XrayS, IrS, RadioS, VisS, UvES, UvS, emls, N/A, UNIDENTIFIED, inconclusive, Galaxy/Star, Star/Galaxy, star+galaxy, galaxy+star, quasar+star, star+quasar, cont, NID, NSP, UNK, U, U1, U2, U3, U-rad, nonAGN, noAGN, too-faint, featureless, blend, undetected, noisy, tbd, Gamma-ray source, gamma, molecular cloud, multiple, galactic center, Rad, mR, cm, mm, smm, HI, rB, Mas, IR, FIR, MIR, NIR, blu, UV, X, ULX, gam, gB, G?, SC?, C?G, Gr?, As?, EB?, Sy?, CV?, No?, XB?, LX?, HX?, mul, reg, vid, IG, ISM, PoC, CGb, bub, EmO, Cld, GNe, DNe, RNe, MoC, glb, cor, SFR, HVC, HII, PN, sh, blank, -, ?, ??, NONE, BLANK

• Numeric codes: 10/11/12/15/20/220/230 (Class_BAT-105M), 0.0/2.0/1.0/3.0 (n_F1_4_2slaqqso), -1.0 (Clsp_C-COSM → no z measurable), 0.0 (Clph_C-COSM), 0.0 (Type_BASS_agns), 255 (exgal_eRASS1_ctp → undefined/masked)

For each source, best_class is chosen from the highest-priority tier that has a non-unknown classification:

Priority: spec_class > SED_class > xray_class > image_class > gen_class

• If all tiers are "unknown", best_class = "unknown".
• If no tier has any classification, best_class is null (unclassified).