Pith Number

pith:B2BW4QAI

pith:1999:B2BW4QAIOME5ILZWSVLG4PFOVK

not attested not anchored not stored refs pending

H_2 Absorption and Fluorescence for Gamma Ray Bursts in Molecular Clouds

B. T. Draine

arxiv:astro-ph/9907232 v1 · 1999-07-16 · 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{B2BW4QAIOME5ILZWSVLG4PFOVK}

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	2026-05-18T01:40:12.901201Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e836e40087309d42f3695566e3caeaa943782f767d0a7a7599e3fab156faddc

Aliases

arxiv: astro-ph/9907232 · arxiv_version: astro-ph/9907232v1 · doi: 10.48550/arxiv.astro-ph/9907232 · pith_short_12: B2BW4QAIOME5 · pith_short_16: B2BW4QAIOME5ILZW · pith_short_8: B2BW4QAI

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/B2BW4QAIOME5ILZWSVLG4PFOVK \
  | 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: 0e836e40087309d42f3695566e3caeaa943782f767d0a7a7599e3fab156faddc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "faf00ad509cf04983928722c9d5c9139b3acc4f1a83bfb205b1a225431f548ee",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-16T19:16:01Z",
    "title_canon_sha256": "d1f8c280cd9abded674bff0a4b38f6c3d23e311262b4b42117a547a8a7db8a67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907232",
    "kind": "arxiv",
    "version": 1
  }
}