Pith Number

pith:QGFWK2XG

pith:2003:QGFWK2XG2GIJPAF2UHWKGM6MNR

not attested not anchored not stored refs pending

XMM-Newton Observations of the Ultraluminous Nuclear X-ray Source in M33

G. Di Cocco, G. Malaguti, J. Rodriguez, L. C. Ho, L. Foschini, M. Dadina, T. J.-L. Courvoisier, Y. Fuchs

arxiv:astro-ph/0312118 v2 · 2003-12-04 · 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{QGFWK2XG2GIJPAF2UHWKGM6MNR}

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	2026-05-18T04:21:41.364470Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

818b656ae6d1909780baa1eca333cc6c5965af00718fd7e619853bf4f1de3f8f

Aliases

arxiv: astro-ph/0312118 · arxiv_version: astro-ph/0312118v2 · doi: 10.48550/arxiv.astro-ph/0312118 · pith_short_12: QGFWK2XG2GIJ · pith_short_16: QGFWK2XG2GIJPAF2 · pith_short_8: QGFWK2XG

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/QGFWK2XG2GIJPAF2UHWKGM6MNR \
  | 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: 818b656ae6d1909780baa1eca333cc6c5965af00718fd7e619853bf4f1de3f8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a078e502d3b6826199fb125ff4601bb0bc51b809373dc3d1381593015a7b4332",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-12-04T10:53:24Z",
    "title_canon_sha256": "e493d2c9402ee5c4e9752144daca9b1ad7363211d8f654586c7848ba14848aad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0312118",
    "kind": "arxiv",
    "version": 2
  }
}