Pith Number

pith:DMTIJOEC

pith:2021:DMTIJOECZG3YYO6W5OODISBVHU

not attested not anchored not stored refs pending

Variation of Broad Emission Lines from QSOs with Optical/UV Periodicity to Test the Interpretation of Supermassive Binary Black Holes

Changshuo Yan, Junqiang Ge, Xiang Ji, Youjun Lu, Zihao Song

arxiv:2103.16448 v1 · 2021-03-30 · 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{DMTIJOECZG3YYO6W5OODISBVHU}

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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	2026-07-05T02:29:48.379040Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b2684b882c9b78c3bd6eb9c3448353d030b90f0df859cf316e621f1a1bc240f

Aliases

arxiv: 2103.16448 · arxiv_version: 2103.16448v1 · doi: 10.48550/arxiv.2103.16448 · pith_short_12: DMTIJOECZG3Y · pith_short_16: DMTIJOECZG3YYO6W · pith_short_8: DMTIJOEC

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/DMTIJOECZG3YYO6W5OODISBVHU \
  | 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: 1b2684b882c9b78c3bd6eb9c3448353d030b90f0df859cf316e621f1a1bc240f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0221e57edb1064f6c1fc08075a6d3d275eee47a8afeae2c8d5c11637d9a6e72",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-03-30T15:47:52Z",
    "title_canon_sha256": "23fa8ffb20bfe4848e2b372d7ba029a441e9ca7f1b24d277862a703cc2214ccf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.16448",
    "kind": "arxiv",
    "version": 1
  }
}