Pith Number

pith:UTWJKFJP

pith:2010:UTWJKFJP4QOHRLUJSBEFINKQIA

not attested not anchored not stored refs pending

The Antennae Galaxies (NGC 4038/4039) Revisited: ACS and NICMOS Observations of a Prototypical Merger

(2) University of Toledo, (3) Carnegie Observatories, 4), (4) Naval Research Laboratory, (5) The University of Arizona, (6) The Johns Hopkins University, (7) European Southern Observatory, (8) Instituto de Estructura de la Materia, A. Alonso-Herrero (8) ((1) Space Telescope Science Institute, Barry Rothberg (1, Bradley C. Whitmore (1), Claus Leitherer (1), CSIC), Francois Schweizer (3), George Rieke (5), Marcia Rieke (5), Rupali Chandar (2), S. Mengel (7), W. P. Blair (6)

arxiv:1005.0629 v1 · 2010-05-04 · astro-ph.EP · astro-ph.GA

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

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	2026-05-18T02:07:42.875048Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4ec95152fe41c78ae8990485435504005485304444863a432ce65157e8beb00

Aliases

arxiv: 1005.0629 · arxiv_version: 1005.0629v1 · doi: 10.48550/arxiv.1005.0629 · pith_short_12: UTWJKFJP4QOH · pith_short_16: UTWJKFJP4QOHRLUJ · pith_short_8: UTWJKFJP

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/UTWJKFJP4QOHRLUJSBEFINKQIA \
  | 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: a4ec95152fe41c78ae8990485435504005485304444863a432ce65157e8beb00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f1d4dc101dcf4cb1e04e9d9da5ec044eb43b37afc724ee0c36dbc59d01cc7ef",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2010-05-04T20:20:17Z",
    "title_canon_sha256": "8df55158e3793793dafccc1b45a62d541287948989c1b1b0d463f1814a6d9b87"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.0629",
    "kind": "arxiv",
    "version": 1
  }
}