Pith Number

pith:IPG4SUZP

pith:2010:IPG4SUZPFOBIWITLSFHQJZYXSB

not attested not anchored not stored refs pending

Spitzer Space Telescope observations of the Carina Nebula: The steady march of feedback-driven star formation

Barbara A. Whitney, Brian L. Babler, Ed Churchwell, John Bally, Keivan G. Stassun, Marilyn R. Meade, Matthew S. Povich, Nathan Smith, Robert D. Gehrz, Thomas P. Robitaille

arxiv:1004.2263 v1 · 2010-04-13 · astro-ph.SR · 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{IPG4SUZPFOBIWITLSFHQJZYXSB}

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	2026-05-18T02:08:05.992728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43cdc9532f2b828b226b914f04e71790741413c9abde1471fbba6a421014b6f5

Aliases

arxiv: 1004.2263 · arxiv_version: 1004.2263v1 · doi: 10.48550/arxiv.1004.2263 · pith_short_12: IPG4SUZPFOBI · pith_short_16: IPG4SUZPFOBIWITL · pith_short_8: IPG4SUZP

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/IPG4SUZPFOBIWITLSFHQJZYXSB \
  | 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: 43cdc9532f2b828b226b914f04e71790741413c9abde1471fbba6a421014b6f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffd3f898138bd5c14cbc646d4d67a3685d2ba9c38caee5665de8fb149f0cde16",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-04-13T20:05:52Z",
    "title_canon_sha256": "42fbc638b10bed38f7c8b75b62333b5751a06735327d93ab6a0ee481e0e96a31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.2263",
    "kind": "arxiv",
    "version": 1
  }
}