Pith Number

pith:ZJ63IKZ4

pith:1998:ZJ63IKZ4Q2FKNF4XT7BWEKC5IQ

not attested not anchored not stored refs pending

Infalling Gas Towards the Galactic Center

2), (2) Astronomy Dept., Alison L. Coil (1, Berkeley), Paul T.P. Ho (1) ((1) Harvard-Smithsonian Center for Astrophysics, University of California

arxiv:astro-ph/9809068 v2 · 1998-09-05 · 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{ZJ63IKZ4Q2FKNF4XT7BWEKC5IQ}

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	2026-05-17T23:48:07.793820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca7db42b3c868aa697979fc362285d442b7da7c3ee164096b32c291edf58fe17

Aliases

arxiv: astro-ph/9809068 · arxiv_version: astro-ph/9809068v2 · doi: 10.48550/arxiv.astro-ph/9809068 · pith_short_12: ZJ63IKZ4Q2FK · pith_short_16: ZJ63IKZ4Q2FKNF4X · pith_short_8: ZJ63IKZ4

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/ZJ63IKZ4Q2FKNF4XT7BWEKC5IQ \
  | 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: ca7db42b3c868aa697979fc362285d442b7da7c3ee164096b32c291edf58fe17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13ff450ca7423d4966889b4f2c06a87645514b1ecffc3588392e326a93691d3c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-09-05T20:35:58Z",
    "title_canon_sha256": "657cc0b1fab1d26d5be153846fcf310c1a1afc6397bf472f765330761cfd904e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9809068",
    "kind": "arxiv",
    "version": 2
  }
}