Pith Number

pith:AZ5YAO7D

pith:1997:AZ5YAO7DNOW4ZTKG2QW3EAO65Z

not attested not anchored not stored refs pending

Probing ISM Models with H-alpha observations

Andrea Ferrara (Arcetri)

arxiv:astro-ph/9707262 v1 · 1997-07-24 · 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{AZ5YAO7DNOW4ZTKG2QW3EAO65Z}

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	2026-05-18T01:40:16.993311Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

067b803be36badcccd46d42db201deee42df4504667b3202167f199ff12d1297

Aliases

arxiv: astro-ph/9707262 · arxiv_version: astro-ph/9707262v1 · doi: 10.48550/arxiv.astro-ph/9707262 · pith_short_12: AZ5YAO7DNOW4 · pith_short_16: AZ5YAO7DNOW4ZTKG · pith_short_8: AZ5YAO7D

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/AZ5YAO7DNOW4ZTKG2QW3EAO65Z \
  | 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: 067b803be36badcccd46d42db201deee42df4504667b3202167f199ff12d1297

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53a3ae05e2743f7c9a2717ce88435e1742e0be4de298c3f2a5c76557334c4ecf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-07-24T08:33:25Z",
    "title_canon_sha256": "baae16161c3aeb026d9ba62ce4a110c947610fafcf4fc781e0ed7ab2d8fc8d22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9707262",
    "kind": "arxiv",
    "version": 1
  }
}