Pith Number

pith:A5J3JPUA

pith:2005:A5J3JPUAAAHKVVECTHO3FNBEIA

not attested not anchored not stored refs pending

X-ray Luminosity and Absorption Column Fluctuations in the H2O Maser Galaxy NGC 4258 from Weeks to Years

Alexei V. Filippenko, Antonella Fruscione, Elizabeth Galle, James M. Moran, James R. Herrnstein, Lincoln J. Greenhill

arxiv:astro-ph/0501105 v1 · 2005-01-06 · 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{A5J3JPUAAAHKVVECTHO3FNBEIA}

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	2026-07-04T16:50:34.290805Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0753b4be80000eaad48299ddb2b424400c32383001563fdfdc6ca15f0319b16e

Aliases

arxiv: astro-ph/0501105 · arxiv_version: astro-ph/0501105v1 · doi: 10.48550/arxiv.astro-ph/0501105 · pith_short_12: A5J3JPUAAAHK · pith_short_16: A5J3JPUAAAHKVVEC · pith_short_8: A5J3JPUA

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/A5J3JPUAAAHKVVECTHO3FNBEIA \
  | 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: 0753b4be80000eaad48299ddb2b424400c32383001563fdfdc6ca15f0319b16e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "839afb47729d9d42200a774ff887116d5af8d6bc0027445f7f1c02a8e0548e45",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-01-06T21:21:11Z",
    "title_canon_sha256": "a63deba19a7d9c335795b403198dc2c9c927542d44e55dce2c77d64cb2f51c60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0501105",
    "kind": "arxiv",
    "version": 1
  }
}