Pith Number

pith:5GEGXEL3

pith:1999:5GEGXEL3MR66P2BYD6FKES4D3F

not attested not anchored not stored refs pending

Discovery of Radio Outbursts in the Active Nucleus of M81

Guy G. Pooley (Mullard Radio Astr. Obs.), Kurt W. Weiler (NRL), Luis C. Ho (Carnegie Obs.), Richard A. Sramek (NRAO), Schuyler D. Van Dyk (IPAC)

arxiv:astro-ph/9905077 v1 · 1999-05-06 · 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{5GEGXEL3MR66P2BYD6FKES4D3F}

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	2026-05-18T01:08:58.732961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9886b917b647de7e8381f8aa24b83d95d2d7bf8d9792271aacf0b982bb3859e

Aliases

arxiv: astro-ph/9905077 · arxiv_version: astro-ph/9905077v1 · doi: 10.48550/arxiv.astro-ph/9905077 · pith_short_12: 5GEGXEL3MR66 · pith_short_16: 5GEGXEL3MR66P2BY · pith_short_8: 5GEGXEL3

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/5GEGXEL3MR66P2BYD6FKES4D3F \
  | 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: e9886b917b647de7e8381f8aa24b83d95d2d7bf8d9792271aacf0b982bb3859e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1701baa979550a4926260bec187ab84755c007d2b421de0fa22bf62be3cf67f3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-05-06T22:37:21Z",
    "title_canon_sha256": "88fd0ae0adf14e2c9aec2ca61a2fd9d2078c6fb5b9e29a7e4afce56cc4c472e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9905077",
    "kind": "arxiv",
    "version": 1
  }
}