Pith Number

pith:J7NBBDU4

pith:1998:J7NBBDU44ZMYUWFXUGJ5VBO4VE

not attested not anchored not stored refs pending

Dust Spirals and Acoustic Noise in the Nucleus of the Galaxy NGC 2207

5), Ames, B. G. Elmegreen(1), Columbia SC (8) Iowa State Univ., Columbus (7) Midlands Technical College, C. Struck(8), C. Yuan(4, D. M. Elmegreen(2), E. Brinks(3), IA (9) Onsala Space Observatory, L. Montenegro (5), Mexico (4) Academia Sinica, M. Kaufman(6), M. Klaric(7), M. Thomasson (9)((1) IBM Watson, NY (2) Vassar College, NY (3) Univ. de Guanajuato, NY (6) Ohio State Univ., Sweden), Taiwan (5) CCNY

arxiv:astro-ph/9807037 v1 · 1998-07-03 · 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{J7NBBDU44ZMYUWFXUGJ5VBO4VE}

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	2026-05-18T01:40:13.978037Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4fda108e9ce6598a58b7a193da85dca93d5a413bee515f561afd0be8a57f48ee

Aliases

arxiv: astro-ph/9807037 · arxiv_version: astro-ph/9807037v1 · doi: 10.48550/arxiv.astro-ph/9807037 · pith_short_12: J7NBBDU44ZMY · pith_short_16: J7NBBDU44ZMYUWFX · pith_short_8: J7NBBDU4

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/J7NBBDU44ZMYUWFXUGJ5VBO4VE \
  | 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: 4fda108e9ce6598a58b7a193da85dca93d5a413bee515f561afd0be8a57f48ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "839623b580e7095f3ab197ca61cf9fcfd37691be4aed4f72e321de2d90759718",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-07-03T12:43:35Z",
    "title_canon_sha256": "0ef4bcfe52d07d2fad07df1748797bcaefceabe532bdd4ef85839427424d0e52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9807037",
    "kind": "arxiv",
    "version": 1
  }
}