Pith Number

pith:5P45G4KA

pith:2012:5P45G4KARJVCW52U2LBEEXRELW

not attested not anchored not stored refs pending

The nature of the bright ULX X-2 in NGC3921: a Chandra position and HST candidate counterpart

A. C. Fabian, D. J. Walton, E. M. Ratti, G. Miniutti, J. C. A. Miller-Jones, M. A. P. Torres, M. Heida, P. G. Jonker, T. P. Roberts

arxiv:1208.4502 v1 · 2012-08-22 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5P45G4KARJVCW52U2LBEEXRELW}

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	2026-05-18T01:54:59.681831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ebf9d371408a6a2b7754d2c2425e245da5398f05e712a98fa18ef5b727f14802

Aliases

arxiv: 1208.4502 · arxiv_version: 1208.4502v1 · doi: 10.48550/arxiv.1208.4502 · pith_short_12: 5P45G4KARJVC · pith_short_16: 5P45G4KARJVCW52U · pith_short_8: 5P45G4KA

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/5P45G4KARJVCW52U2LBEEXRELW \
  | 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: ebf9d371408a6a2b7754d2c2425e245da5398f05e712a98fa18ef5b727f14802

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ddb1016060404564d1d6663700a7d379853c6e2d3de14d76e1f2a30e323d8aa",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-08-22T14:10:41Z",
    "title_canon_sha256": "5f02d6fd1538bbb20ba6d71dd646103bc5b231cb7aa728f307c0505d5fba80c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.4502",
    "kind": "arxiv",
    "version": 1
  }
}