Pith Number

pith:VSJRBYQL

pith:2015:VSJRBYQLAHU7KBH52RZZTSAIZD

not attested not anchored not stored refs pending

He II Proximity Effect and the Lifetime of Quasars

G. Worseck, I.S. Khrykin, J.F. Hennawi, M. McQuinn

arxiv:1511.03659 v2 · 2015-11-11 · 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{VSJRBYQLAHU7KBH52RZZTSAIZD}

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	2026-05-18T01:11:50.198522Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac9310e20b01e9f504fdd47399c808c8dcd88ff4a16e97bd1b108667c6b396b5

Aliases

arxiv: 1511.03659 · arxiv_version: 1511.03659v2 · doi: 10.48550/arxiv.1511.03659 · pith_short_12: VSJRBYQLAHU7 · pith_short_16: VSJRBYQLAHU7KBH5 · pith_short_8: VSJRBYQL

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/VSJRBYQLAHU7KBH52RZZTSAIZD \
  | 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: ac9310e20b01e9f504fdd47399c808c8dcd88ff4a16e97bd1b108667c6b396b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37abef7201f5b150bba2a6390152369e0ea3033415c8434c093b305c4600fbcd",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-11-11T20:59:13Z",
    "title_canon_sha256": "ce7714891c8527c8044217b9543a712f57ce120e4f28fe3c49f5e54636375033"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.03659",
    "kind": "arxiv",
    "version": 2
  }
}