Pith Number

pith:Y4BQ7Z6T

pith:2003:Y4BQ7Z6T4V5LUE43UPKI7GP6NZ

not attested not anchored not stored refs pending

The quasar Q0957+561: Lensed CO emission from a disk at z~1.4?

A. Eckart, J. Martin-Pintado, L. Colina, M. Krips, P. Planesas, R. Neri

arxiv:astro-ph/0311600 v1 · 2003-11-27 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y4BQ7Z6T4V5LUE43UPKI7GP6NZ}

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	2026-05-18T00:52:34.881721Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7030fe7d3e57aba139ba3d48f99fe6e65b543b9ad69f63d9848199dd3724d97

Aliases

arxiv: astro-ph/0311600 · arxiv_version: astro-ph/0311600v1 · doi: 10.48550/arxiv.astro-ph/0311600 · pith_short_12: Y4BQ7Z6T4V5L · pith_short_16: Y4BQ7Z6T4V5LUE43 · pith_short_8: Y4BQ7Z6T

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/Y4BQ7Z6T4V5LUE43UPKI7GP6NZ \
  | 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: c7030fe7d3e57aba139ba3d48f99fe6e65b543b9ad69f63d9848199dd3724d97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81b079d64fa18dbab79383b3da17799cb89319a0482fd0a21616c46307df2dcc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-11-27T10:21:52Z",
    "title_canon_sha256": "2bd84c6069f8dc66159796117b8272f9c4f09d91aa1b5de29bae50012b6c1b71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0311600",
    "kind": "arxiv",
    "version": 1
  }
}