Pith Number

pith:5C4GZQUC

pith:2018:5C4GZQUCSL4NP6TH7EHHEWRS4G

not attested not anchored not stored refs pending

Systematic Redshift of the Fe III UV Lines in Quasars. Measuring Supermassive Black Hole Masses under the Gravitational Redshift Hypothesis

C. Fian, E. Falco, E. Guerras, E. Mediavilla, J. A. Mu\~noz, J. Jim\'enez-Vicente, V. Motta

arxiv:1807.04048 v1 · 2018-07-11 · astro-ph.GA · 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{5C4GZQUCSL4NP6TH7EHHEWRS4G}

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	2026-05-18T00:08:38.186613Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8b86cc28292f8d7fa67f90e725a32e1bd835adedf29f6ba7ae6b1b2ca7bff70

Aliases

arxiv: 1807.04048 · arxiv_version: 1807.04048v1 · doi: 10.48550/arxiv.1807.04048 · pith_short_12: 5C4GZQUCSL4N · pith_short_16: 5C4GZQUCSL4NP6TH · pith_short_8: 5C4GZQUC

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/5C4GZQUCSL4NP6TH7EHHEWRS4G \
  | 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: e8b86cc28292f8d7fa67f90e725a32e1bd835adedf29f6ba7ae6b1b2ca7bff70

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c7621e13b0cd217ed0d340a7c84161a24a43a3fe2737d39221807e29e384170",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-11T10:00:29Z",
    "title_canon_sha256": "125eb4347b5b0856b62ce6514463cf9cec6d261180bc9f3e8db5294224f3c345"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04048",
    "kind": "arxiv",
    "version": 1
  }
}