Pith Number

pith:GW2HWG3M

pith:2001:GW2HWG3MGWDQ6O333ERQK2AFDY

not attested not anchored not stored refs pending

Halo Tracing with Atomic Hydrogen

M.R. Merrifield (University of Nottingham)

arxiv:astro-ph/0107291 v1 · 2001-07-16 · 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{GW2HWG3MGWDQ6O333ERQK2AFDY}

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	2026-05-18T00:37:00.978332Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

35b47b1b6c35870f3b7bd9230568051e04e52928a100535aa07e1af8b4104314

Aliases

arxiv: astro-ph/0107291 · arxiv_version: astro-ph/0107291v1 · doi: 10.48550/arxiv.astro-ph/0107291 · pith_short_12: GW2HWG3MGWDQ · pith_short_16: GW2HWG3MGWDQ6O33 · pith_short_8: GW2HWG3M

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/GW2HWG3MGWDQ6O333ERQK2AFDY \
  | 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: 35b47b1b6c35870f3b7bd9230568051e04e52928a100535aa07e1af8b4104314

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1fa2f06c31ff9ae066ff897c093818fdff90f6e878cf2174fd04f2847f9a4c0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-07-16T22:47:35Z",
    "title_canon_sha256": "816150d4af3bd22aaf5fc711a6ce14f90acca8d924ff0e94030cbf528f92907d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0107291",
    "kind": "arxiv",
    "version": 1
  }
}