Pith Number

pith:PDDWXEZD

pith:2007:PDDWXEZD34Z2DOKIIFYTQLXVXG

not attested not anchored not stored refs pending

NGC 5548 in a Low-Luminosity State: Implications for the Broad-Line Region

10) (1. The Ohio State University, 10. Research Center for the Early Universe, 2. University of St. Andrews, 3), 3. University of Michigan, 4), 4. Michigan State University, 5. Institute of Astronomy, 6), 6. Herzberg Institute of Astrophysics, 7. Crimean Astrophysical Observatory, 8), 8. Isaak Newton Institute of Chile, 9. Steward Observatory, Bradley M. Peterson (1), Charles Kuehn (1, Christopher A. Onken (1, Douglas O. Richstone (3), Edward M. Cackett (2, Himel Ghosh (1), Jeffrey K. J. Fogel (3), Keith D. Horne (2), Kelly D. Denney (1), Marianne Vestergaard (9), Matthew G. Walker (3), Matthias Dietrich (1), Misty C. Bentz (1), Richard W. Pogge (1), Sergey G. Sergeev (7, Takeo Minezaki (5), University of Tokyo, University of Tokyo), Vladimir I. Pronik (7, Yuzuru Yoshii (5

arxiv:astro-ph/0702644 v1 · 2007-02-23 · 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{PDDWXEZD34Z2DOKIIFYTQLXVXG}

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	2026-05-18T04:29:06.242058Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78c76b9323df33a1b9484171382ef5b9a732fda70160a82b5a5208935b23140f

Aliases

arxiv: astro-ph/0702644 · arxiv_version: astro-ph/0702644v1 · doi: 10.48550/arxiv.astro-ph/0702644 · pith_short_12: PDDWXEZD34Z2 · pith_short_16: PDDWXEZD34Z2DOKI · pith_short_8: PDDWXEZD

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/PDDWXEZD34Z2DOKIIFYTQLXVXG \
  | 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: 78c76b9323df33a1b9484171382ef5b9a732fda70160a82b5a5208935b23140f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4173ccb7ae658143e7b6ed83d9608a5a0973d43cd25f6fcc001214d1b7ee17f3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-02-23T21:00:38Z",
    "title_canon_sha256": "aaeb49413eabb607ac588464c2a320d94114d7d264f74d2e881703d70b158bf1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0702644",
    "kind": "arxiv",
    "version": 1
  }
}