Pith Number

pith:6X4FPH4I

pith:2009:6X4FPH4IRXD7DOLUZAO6SA4MLA

not attested not anchored not stored refs pending

Spitzer View of Young Massive Stars in the LMC HII Complex N44

2), (2) U of Illinois, (3) STScI, (4) U of Michigan), C.-H. Rosie Chen (1, Fabian Heitsch (4) ((1) U of Virginia, Karl D. Gordon (3), Robert A. Gruendl (2), You-Hua Chu (2)

arxiv:0901.1328 v1 · 2009-01-09 · 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{6X4FPH4IRXD7DOLUZAO6SA4MLA}

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	2026-05-18T02:35:08.283891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5f8579f888dc7f1b974c81de9038c5830492dc72c8ec7e8eabb8a768f98f559

Aliases

arxiv: 0901.1328 · arxiv_version: 0901.1328v1 · doi: 10.48550/arxiv.0901.1328 · pith_short_12: 6X4FPH4IRXD7 · pith_short_16: 6X4FPH4IRXD7DOLU · pith_short_8: 6X4FPH4I

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/6X4FPH4IRXD7DOLUZAO6SA4MLA \
  | 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: f5f8579f888dc7f1b974c81de9038c5830492dc72c8ec7e8eabb8a768f98f559

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3691606beb7588a11ac540a139438933bc11351b2d16517357006a931f34dc63",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-01-09T21:41:34Z",
    "title_canon_sha256": "dd4d63cb6a34b2c9dbc3827b0a76a1bfa46a10a71af52c5ae873161473c3bcac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.1328",
    "kind": "arxiv",
    "version": 1
  }
}