Pith Number

pith:XOLWPITK

pith:2016:XOLWPITKPIBVIP3TILL566K6EL

not attested not anchored not stored refs pending

The optical-UV emissivity of quasars: dependence on black hole mass and radio loudness

(2) INAF--Osservatorio Astronomico di Brera, (3) Observatoire de Geneve, (4) University of Alberta, (5) University of Oklahoma, (6) Universita' degli Studi Roma Tre, (7) Institute of Astronomy, Cambridge), Christian Knigge (1), Diego Altamirano (1), Fabio La Franca (6), Francesco Shankar (1), Giorgio Calderone (2), Gregory Sivakoff (4), Ian McHardy (1), Jack Riley (1), James Gray (1), James Matthews (1), Judith Croston (1), Kayleigh Richardson (1), Krzysztof Hryniewicz (3), Matthew Middleton (7) ((1) University of Southampton, Poshak Gandhi (1), Rachel Buckland (1), Sebastian F. Hoenig (1), Xinyu Dai (5)

arxiv:1601.02021 v1 · 2016-01-08 · astro-ph.GA · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XOLWPITKPIBVIP3TILL566K6EL}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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.

Receipt and verification

First computed	2026-05-18T01:20:32.303297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb9767a26a7a03543f7342d7df795e22d92369dca318ac4116e91a4f1667d59e

Aliases

arxiv: 1601.02021 · arxiv_version: 1601.02021v1 · doi: 10.48550/arxiv.1601.02021 · pith_short_12: XOLWPITKPIBV · pith_short_16: XOLWPITKPIBVIP3T · pith_short_8: XOLWPITK

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/XOLWPITKPIBVIP3TILL566K6EL \
  | 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: bb9767a26a7a03543f7342d7df795e22d92369dca318ac4116e91a4f1667d59e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a29bee92d6cf16cfccf62786420f00658228332249d43e15ef9d73db80abb411",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-01-08T21:00:06Z",
    "title_canon_sha256": "c0af10040d0f9b76fb895e6d4f88dc15ff21e0727b9263713adc64ca47117dc2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.02021",
    "kind": "arxiv",
    "version": 1
  }
}