Pith Number

pith:OXUKNCYH

pith:1995:OXUKNCYHF4PLRAMZ6JYJ43TF5F

not attested not anchored not stored refs resolved

Unified Schemes for Radio-Loud Active Galactic Nuclei

C. Megan Urry, Paolo Padovani

Radio-loud active galactic nuclei of different observed types are the same objects seen from different directions.

arxiv:astro-ph/9506063 v2 · 1995-06-09 · astro-ph

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\usepackage{pith}
\pithnumber{OXUKNCYHF4PLRAMZ6JYJ43TF5F}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We outline the two most plausible unified schemes for radio-loud AGN, one linking quasars and luminous radio galaxies and another linking BL Lac objects and less luminous radio galaxies. Using the formalism appropriate to samples biased by relativistic beaming, we show the population statistics for two schemes are in accordance with available data.

C2weakest assumption

That the different observed classes represent the same intrinsic AGN populations viewed at different orientations, with relativistic beaming and obscuration as the dominant sources of apparent diversity rather than intrinsic differences in luminosity or other properties.

C3one line summary

Unified schemes attribute the diverse appearances of radio-loud AGN to orientation effects, with statistical agreement between predicted and observed populations.

References

9 extracted · 9 resolved · 0 Pith anchors

[1] Abraham, R. G., Crawford, C. S., and McHardy, I. M. 1992, ApJ, 401, 474 Abraham, R. G., Crawford, C. S., Merriﬁeld, M. R., Hutchings , J. B., and McHardy, I. M. 1993, ApJ, 415, 101 Abraham, R. G., McH 1992

[2] (Berlin, Springer), p. 161 Blandford, R. D., and Rees, M. J. 1978, in Pittsburgh Confere nce on BL Lac Objects, ed. A. N. Wolfe (Pittsburgh, Univ. of Pitt. Press), p. 328 Bodo, G., and Ghisellini, G. 1978

[3] (Copyright American Astronomical Society, reproduced with permission.) Fig 1991

[4] 1995; ﬁgure courtesy of James Dunlop) 1995

[5] and X-ray-selecte d BL Lacs (dot-dashed line ) from the EMSS sample (Stocke et al. 1991). Data for the FR Is c ome from Morganti et al. (1993); those for RBL have been derived from t he R values (Appe 1991

Formal links

1 machine-checked theorem link

Cited by

64 papers in Pith

Beyond traditional emission-line diagnostics: using autoencoders to uncover active galactic nuclei in DESI spectra

X-ray Spectral Properties of Four Classical TeV Blazars using Simultaneous Observations from NICER and NuSTAR

Detection of Quasiperiodic Oscillations in the Blazar PKS 0735+178 with TESS

A Tentative Double Excess in the Gamma-Ray Spectrum of the Fermi Blazar 4FGL J0604.9-0000

X-ray Fourier lag-frequency spectra modulated by stochastic turbulent acceleration in the jets of high-frequency-peaked BL Lac

Receipt and verification

First computed	2026-07-04T17:50:23.098555Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75e8a68b072f1eb88199f2709e6e65e95fcc23bb3f342327ae459d05b6b19771

Aliases

arxiv: astro-ph/9506063 · arxiv_version: astro-ph/9506063v2 · doi: 10.48550/arxiv.astro-ph/9506063 · pith_short_12: OXUKNCYHF4PL · pith_short_16: OXUKNCYHF4PLRAMZ · pith_short_8: OXUKNCYH

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/OXUKNCYHF4PLRAMZ6JYJ43TF5F \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 75e8a68b072f1eb88199f2709e6e65e95fcc23bb3f342327ae459d05b6b19771

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8ee6c7583ad1936e27308b1c1b549ea8033aa9f94d31a6db446cdcd521a6efb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-06-09T01:34:08Z",
    "title_canon_sha256": "b388b17024b1cc693e3c3711b74c24742b2eaf144dab78f7f62b8e3d722157a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9506063",
    "kind": "arxiv",
    "version": 2
  }
}