Pith Number

pith:QFMUG72O

pith:2025:QFMUG72OYKLPPFE3OYCPSM2NTB

not attested not anchored not stored refs pending

Accretion disc reverberation mapping of the quasar 3C 273

David Sanmartim, Edward M. Cackett, Hartmut Winkler, Hermine Landt, James P. Thorne, Jiamu Huang, Juan V. Hernandez Santisteban, Keith Horne

arxiv:2502.08366 v1 · 2025-02-12 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QFMUG72OYKLPPFE3OYCPSM2NTB}

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	2026-07-05T10:13:21.731756Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8159437f4ec296f7949b7604f9334d984e5a764adb7d43f556355dc4ffb24c24

Aliases

arxiv: 2502.08366 · arxiv_version: 2502.08366v1 · doi: 10.48550/arxiv.2502.08366 · pith_short_12: QFMUG72OYKLP · pith_short_16: QFMUG72OYKLPPFE3 · pith_short_8: QFMUG72O

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/QFMUG72OYKLPPFE3OYCPSM2NTB \
  | 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: 8159437f4ec296f7949b7604f9334d984e5a764adb7d43f556355dc4ffb24c24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "703c5eb4cb4c973a6c4bd9e2a6cd8e3c65fe3c6d5841405370c56bfc09f7196c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-02-12T12:51:38Z",
    "title_canon_sha256": "679f7dc1e918c2a5202680b0c1f82ee4a1aa12b22c89991c2771a844facb642f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.08366",
    "kind": "arxiv",
    "version": 1
  }
}