Pith Number

pith:FEYB5SNX

pith:2011:FEYB5SNX3L6746NBZHASL6W7OJ

not attested not anchored not stored refs pending

GALEX observations of quasar variability in the ultraviolet

Barry Y. Welsh, James D. Neill, Jonathan M. Wheatley

arxiv:1101.2191 v2 · 2011-01-11 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FEYB5SNX3L6746NBZHASL6W7OJ}

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	2026-05-18T02:03:42.903005Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29301ec9b7dafdfe79a1c9c125fadf7246c7bdb07b5ed93ec5be5ebbb27c3cc4

Aliases

arxiv: 1101.2191 · arxiv_version: 1101.2191v2 · doi: 10.48550/arxiv.1101.2191 · pith_short_12: FEYB5SNX3L67 · pith_short_16: FEYB5SNX3L6746NB · pith_short_8: FEYB5SNX

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/FEYB5SNX3L6746NBZHASL6W7OJ \
  | 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: 29301ec9b7dafdfe79a1c9c125fadf7246c7bdb07b5ed93ec5be5ebbb27c3cc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac7c9c2f81e7fa5654084f4f743dfc8957d17e08ecd65f20247427cb47c85e5f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-01-11T19:56:00Z",
    "title_canon_sha256": "2fc6b237158c83eeff27e95b35fd79765590ce099ee97b8477362fcbcd6bf92b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.2191",
    "kind": "arxiv",
    "version": 2
  }
}