Pith Number

pith:YQFMMDZL

pith:2005:YQFMMDZL7XSUUS5BCG4SMNSKE4

not attested not anchored not stored refs pending

Unobscured QSO2: A New Class of Objects?

Ann Arbor), A. Wolter (1), C. R. Mullis (4) ((1) INAF - Oss. Astr. di Brera Milano (2) INAF-CNR IRA Bologna (3) IfA, Honolulu (4) Dept. of Astronomy, I. M. Gioia (2), J. P. Henry (3), Univ. of Hawaii, Univ. of Michigan

arxiv:astro-ph/0510045 v1 · 2005-10-03 · 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{YQFMMDZL7XSUUS5BCG4SMNSKE4}

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	2026-05-18T01:07:26.248618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c40ac60f2bfde54a4ba111b926364a2719a781122956db5c2b31c43767df4bc1

Aliases

arxiv: astro-ph/0510045 · arxiv_version: astro-ph/0510045v1 · doi: 10.48550/arxiv.astro-ph/0510045 · pith_short_12: YQFMMDZL7XSU · pith_short_16: YQFMMDZL7XSUUS5B · pith_short_8: YQFMMDZL

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/YQFMMDZL7XSUUS5BCG4SMNSKE4 \
  | 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: c40ac60f2bfde54a4ba111b926364a2719a781122956db5c2b31c43767df4bc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a20d92d05b9bb26b290506480ad02f6d74f337ab87cf5ac492bb1f2188af69cd",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-10-03T15:21:36Z",
    "title_canon_sha256": "cc00e7a616245d99834bfb4d5902f4012162aa4331eae8b1dec47f2809f1e600"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0510045",
    "kind": "arxiv",
    "version": 1
  }
}