Pith Number

pith:IL6NZZZS

pith:2012:IL6NZZZSR7PMFNLYD6WOPZY26C

not attested not anchored not stored refs pending

The distribution of equivalent widths in long GRB afterglow spectra

A. de Ugarte Postigo, B. Milvang-Jensen, C. C. Thoene, D. Malesani, G. Leloudas, J. Gorosabel, J. Hjorth, J. P. U. Fynbo, K. Wiersema, L. Christensen, P. Jakobsson, R. Sanchez-Ramirez, S. Schulze, T. Zafar

arxiv:1209.0891 v1 · 2012-09-05 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IL6NZZZSR7PMFNLYD6WOPZY26C}

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	2026-05-18T03:38:34.814278Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42fcdce7328fdec2b5781face7e71af0beba5536326f6c358189c51a08e4c7fd

Aliases

arxiv: 1209.0891 · arxiv_version: 1209.0891v1 · doi: 10.48550/arxiv.1209.0891 · pith_short_12: IL6NZZZSR7PM · pith_short_16: IL6NZZZSR7PMFNLY · pith_short_8: IL6NZZZS

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/IL6NZZZSR7PMFNLYD6WOPZY26C \
  | 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: 42fcdce7328fdec2b5781face7e71af0beba5536326f6c358189c51a08e4c7fd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "717c8e48f56a0433d19e194f7bbd135346b22b6c0ecd0afaa1d1e30413ab6961",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-05T08:29:26Z",
    "title_canon_sha256": "50a96ceb91161607a5ee68b39bbb6b0d6194c35451dd8d31fd13372780d6db3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.0891",
    "kind": "arxiv",
    "version": 1
  }
}