Pith Number

pith:SPT3MUVG

pith:2018:SPT3MUVGFUXD5UTRLJRSOFN2UP

not attested not anchored not stored refs pending

Constraints on accretion disk size in the massive type 1 quasar PG 2308+098 from optical continuum reverberation lags

Mitsuru Kokubo (Tohoku University)

arxiv:1807.11481 v1 · 2018-07-30 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SPT3MUVGFUXD5UTRLJRSOFN2UP}

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	2026-05-18T00:04:55.294617Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93e7b652a62d2e3ed2715a632715baa3e61fbc93b2372022594c97c750fc013a

Aliases

arxiv: 1807.11481 · arxiv_version: 1807.11481v1 · doi: 10.48550/arxiv.1807.11481 · pith_short_12: SPT3MUVGFUXD · pith_short_16: SPT3MUVGFUXD5UTR · pith_short_8: SPT3MUVG

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/SPT3MUVGFUXD5UTRLJRSOFN2UP \
  | 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: 93e7b652a62d2e3ed2715a632715baa3e61fbc93b2372022594c97c750fc013a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e4b8544f080120312715d0bb2090ef12785efb20d67750a006b141421d336831",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-30T18:00:00Z",
    "title_canon_sha256": "1de74c2ab446b3ee63b716f5cb7bb74a850d221979dd2c86279a8f179d0564f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.11481",
    "kind": "arxiv",
    "version": 1
  }
}