Pith Number

pith:RZCQRCFG

pith:2007:RZCQRCFG4KRQBPNAQ72MUDXPQO

not attested not anchored not stored refs pending

The superorbital variability and triple nature of the X-ray source 4U 1820-303

A. A. Zdziarski, L. Wen, M. Gierlinski

arxiv:astro-ph/0701470 v2 · 2007-01-16 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RZCQRCFG4KRQBPNAQ72MUDXPQO}

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	2026-07-04T15:16:31.269658Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e450888a6e2a300bda087f4ca0eef83a8b6ae7d9cca81f8b837ece78eb39fc1

Aliases

arxiv: astro-ph/0701470 · arxiv_version: astro-ph/0701470v2 · doi: 10.48550/arxiv.astro-ph/0701470 · pith_short_12: RZCQRCFG4KRQ · pith_short_16: RZCQRCFG4KRQBPNA · pith_short_8: RZCQRCFG

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/RZCQRCFG4KRQBPNAQ72MUDXPQO \
  | 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: 8e450888a6e2a300bda087f4ca0eef83a8b6ae7d9cca81f8b837ece78eb39fc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a643a56a659320ad32ef23802272e8635126233a18f1fe095754a17a9aad3ea1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-01-16T16:46:46Z",
    "title_canon_sha256": "3656bec8431715973418074f25ed1d0548205976fdff04a2a3162d3589263609"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0701470",
    "kind": "arxiv",
    "version": 2
  }
}