Pith Number

pith:MQQSTVCK

pith:2012:MQQSTVCK26ELCDWJGBN3SFFLTV

not attested not anchored not stored refs pending

A seasonal cycle and an abrupt change in the variability characteristics of the intraday variable source S4 0954+65

A. Witzel, H. G. Song, J. A. Zensus, K. \'E. Gab\'anyi, L. Fuhrmann, N. Marchili, T. P. Krichbaum, X. Liu

arxiv:1204.5012 v2 · 2012-04-23 · astro-ph.HE · 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{MQQSTVCK26ELCDWJGBN3SFFLTV}

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	2026-05-18T01:57:47.470682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

642129d44ad788b10ec9305bb914ab9d68d2855bea3d6861da3c712a209a9ceb

Aliases

arxiv: 1204.5012 · arxiv_version: 1204.5012v2 · doi: 10.48550/arxiv.1204.5012 · pith_short_12: MQQSTVCK26EL · pith_short_16: MQQSTVCK26ELCDWJ · pith_short_8: MQQSTVCK

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/MQQSTVCK26ELCDWJGBN3SFFLTV \
  | 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: 642129d44ad788b10ec9305bb914ab9d68d2855bea3d6861da3c712a209a9ceb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab0f0f652a0592ec7e6ed06942f41532c796269986eeda29df0521e4a4046be9",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-04-23T09:47:22Z",
    "title_canon_sha256": "d405454e95ae6b1703938196f41c30e3f4afe7188cad86e322134d220b4afc05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5012",
    "kind": "arxiv",
    "version": 2
  }
}