Pith Number

pith:QD5VD5VA

pith:2006:QD5VD5VATAE2UUQBA5N2WCRKIL

not attested not anchored not stored refs pending

Have we detected the most luminous ULX so far?

3), 4) ((1) Institute of Astronomy, A.C. Fabian (1), Cambridge; (2) Dip. di Astronomia, G. Malaguti (3), G. Miniutti (1), G. Ponti (2, M. Cappi (3), M. Dadina (3), P. Gandhi (1, Santiago), Univ. di Bologna; (3) IASF/INAF Bologna; (4) ESO

arxiv:astro-ph/0607501 v2 · 2006-07-21 · 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{QD5VD5VATAE2UUQBA5N2WCRKIL}

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	2026-07-04T15:49:50.939826Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80fb51f6a09809aa5201075bab0a2a42d1ddd5bc82ffd4bc906d8dc50459bf06

Aliases

arxiv: astro-ph/0607501 · arxiv_version: astro-ph/0607501v2 · doi: 10.48550/arxiv.astro-ph/0607501 · pith_short_12: QD5VD5VATAE2 · pith_short_16: QD5VD5VATAE2UUQB · pith_short_8: QD5VD5VA

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/QD5VD5VATAE2UUQBA5N2WCRKIL \
  | 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: 80fb51f6a09809aa5201075bab0a2a42d1ddd5bc82ffd4bc906d8dc50459bf06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8045bf2c71252fbff1531747313d3c275d01cf0c8043d7a4f18bfe0428414bb8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-07-21T12:54:52Z",
    "title_canon_sha256": "bb6c4d73cbe3a8f01d1fbd4045e8e1b7b7126b9f0ad6720bca800d5666ebc59f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0607501",
    "kind": "arxiv",
    "version": 2
  }
}