Pith Number

pith:QJMVPPJD

pith:2001:QJMVPPJDQEE3HMBROYFPUKLSBE

not attested not anchored not stored refs pending

Interstellar H-Alpha Line Profiles toward HD 93521 and the Lockman Window

L. M. Haffner, N. R. Hausen, R. J. Reynolds, S. L. Tufte

arxiv:astro-ph/0112500 v1 · 2001-12-20 · astro-ph

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QJMVPPJDQEE3HMBROYFPUKLSBE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:40:35.721840Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

825957bd238109b3b031760afa297209130e0a7d561345b676ba59f394d83cfe

Aliases

arxiv: astro-ph/0112500 · arxiv_version: astro-ph/0112500v1 · doi: 10.48550/arxiv.astro-ph/0112500 · pith_short_12: QJMVPPJDQEE3 · pith_short_16: QJMVPPJDQEE3HMBR · pith_short_8: QJMVPPJD

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/QJMVPPJDQEE3HMBROYFPUKLSBE \
  | 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: 825957bd238109b3b031760afa297209130e0a7d561345b676ba59f394d83cfe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4cb60811f40a14948227ab1a30183b2d15568c50db2ec5d745e7ba674c05edb2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-12-20T20:26:02Z",
    "title_canon_sha256": "92ab7abd682f0d087a83d16bc934910a1b2620b230eacf4c45f8b784e5ea092d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0112500",
    "kind": "arxiv",
    "version": 1
  }
}