Pith Number

pith:H445JAJ5

pith:1997:H445JAJ5CKR6NL6OZCNZHW6BZM

not attested not anchored not stored refs pending

On the nature of z(abs) ~ z(em) damped absorbers in quasar spectra

Johan U. Fynbo, Palle Moller, Stephen J. Warren

arxiv:astro-ph/9709160 v1 · 1997-09-16 · 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{H445JAJ5CKR6NL6OZCNZHW6BZM}

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	2026-05-18T04:21:40.358959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f39d4813d12a3e6afcec89b93dbc1cb006a79bd50c5d281553fd62e0447e7b3

Aliases

arxiv: astro-ph/9709160 · arxiv_version: astro-ph/9709160v1 · doi: 10.48550/arxiv.astro-ph/9709160 · pith_short_12: H445JAJ5CKR6 · pith_short_16: H445JAJ5CKR6NL6O · pith_short_8: H445JAJ5

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/H445JAJ5CKR6NL6OZCNZHW6BZM \
  | 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: 3f39d4813d12a3e6afcec89b93dbc1cb006a79bd50c5d281553fd62e0447e7b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09bdf9988a0102e42f63eb1298c030c840227d5fc27efc3cb41793e93fee9ca3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-09-16T23:32:07Z",
    "title_canon_sha256": "269c2f7da11803fd30109b084788f8aa81e0406a2d83644163770abeb66a4aa5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9709160",
    "kind": "arxiv",
    "version": 1
  }
}