Pith Number

pith:4GZ7YGNF

pith:2013:4GZ7YGNFIGK7S2WQ4G6VU2S4OB

not attested not anchored not stored refs pending

Evidence of Increased UV FeII Emission in Quasars in Candidate Overdense Regions

D. Farrah, G.M. Williger, I. K. S\"ochting, Kathryn A. Harris, L. Haberzettl, M. J. Graham, M. P. Younger, R. Dav\'e, S. Mitchell

arxiv:1308.3514 v1 · 2013-08-15 · 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{4GZ7YGNFIGK7S2WQ4G6VU2S4OB}

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	2026-05-18T01:48:14.853993Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1b3fc19a54195f96ad0e1bd5a6a5c70418b422ca659544ae3dddd112e47b702

Aliases

arxiv: 1308.3514 · arxiv_version: 1308.3514v1 · doi: 10.48550/arxiv.1308.3514 · pith_short_12: 4GZ7YGNFIGK7 · pith_short_16: 4GZ7YGNFIGK7S2WQ · pith_short_8: 4GZ7YGNF

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/4GZ7YGNFIGK7S2WQ4G6VU2S4OB \
  | 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: e1b3fc19a54195f96ad0e1bd5a6a5c70418b422ca659544ae3dddd112e47b702

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11f1777afbfe6ae28d1b8b061d98ed5cd269a5eb3ca8c7ad244954e655e259e0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-15T21:39:31Z",
    "title_canon_sha256": "9e64b820395f5ba925cdb063ff9df5545192df6332e4238696f41876272f7249"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.3514",
    "kind": "arxiv",
    "version": 1
  }
}