Pith Number

pith:PIIPGAHF

pith:2007:PIIPGAHF2GMFWRHO6QFLOXEZWM

not attested not anchored not stored refs pending

The Early Evolution of Massive Stars: Radio Recombination Line Spectra

Eric Keto, Qizhou Zhang, Stanley Kurtz

arxiv:0708.3388 v2 · 2007-08-24 · 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{PIIPGAHF2GMFWRHO6QFLOXEZWM}

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.

Cited by

1 paper in Pith

The Zero-Age Massive Stellar Population of W49A from VLA Observations

Receipt and verification

First computed	2026-07-04T17:05:19.849056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a10f300e5d1985b44eef40ab75c99b30d4d0bf9338f284cbd1f4aaa0c2b4e82

Aliases

arxiv: 0708.3388 · arxiv_version: 0708.3388v2 · doi: 10.48550/arxiv.0708.3388 · pith_short_12: PIIPGAHF2GMF · pith_short_16: PIIPGAHF2GMFWRHO · pith_short_8: PIIPGAHF

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/PIIPGAHF2GMFWRHO6QFLOXEZWM \
  | 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: 7a10f300e5d1985b44eef40ab75c99b30d4d0bf9338f284cbd1f4aaa0c2b4e82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8e157e757cedc772943925c93f6890259155d4abac3f933963282ff92c16ad9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-08-24T19:18:38Z",
    "title_canon_sha256": "6ff71221251037048514c0921d312212fd39e17a76ca5eeab3f8c2e064bca75c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0708.3388",
    "kind": "arxiv",
    "version": 2
  }
}