Pith Number

pith:F5CI4WNX

pith:2002:F5CI4WNXYZNNJWWVZOPDLJYYKC

not attested not anchored not stored refs pending

Unusual Phase Reversal of Superhumps in ER Ursae Majoris

D. Nogami (Kyoto U), S. Masuda (NAOJ Okayama), T. Kato

arxiv:astro-ph/0211520 v1 · 2002-11-24 · 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{F5CI4WNXYZNNJWWVZOPDLJYYKC}

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	2026-05-18T01:40:39.953172Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f448e59b7c65ad4dad5cb9e35a7185098d808da21a6d038590e0a15a1ba3272

Aliases

arxiv: astro-ph/0211520 · arxiv_version: astro-ph/0211520v1 · doi: 10.48550/arxiv.astro-ph/0211520 · pith_short_12: F5CI4WNXYZNN · pith_short_16: F5CI4WNXYZNNJWWV · pith_short_8: F5CI4WNX

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/F5CI4WNXYZNNJWWVZOPDLJYYKC \
  | 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: 2f448e59b7c65ad4dad5cb9e35a7185098d808da21a6d038590e0a15a1ba3272

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e895d9aa8641c2b7b08a1bb66408797fbb300d06e5e2eb1b48456d02b593316",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-11-24T02:07:31Z",
    "title_canon_sha256": "b5aac1b135aefa51fcb4dfe77e399d1edb719aa4c744396b21f8d46ee3a7e55b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0211520",
    "kind": "arxiv",
    "version": 1
  }
}