Pith Number

pith:EDYBW6QT

pith:2003:EDYBW6QTB34NZUBOOEC7GUL3YB

not attested not anchored not stored refs pending

The Recurrent Nova U Scorpii in the 1999 Outburst: the First Detection of a Significant Orbital-Period Change

2), (2) Kyoto U., (3) U. Tokyo), Izumi Hachisu (3) ((1) Okayama U., Katsura Matsumoto (1, Taichi Kato (2)

arxiv:astro-ph/0301165 v1 · 2003-01-10 · 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{EDYBW6QTB34NZUBOOEC7GUL3YB}

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	2026-05-18T01:40:39.614481Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20f01b7a130ef8dcd02e7105f3517bc07f0ef7227ef265218c480efd7a23f520

Aliases

arxiv: astro-ph/0301165 · arxiv_version: astro-ph/0301165v1 · doi: 10.48550/arxiv.astro-ph/0301165 · pith_short_12: EDYBW6QTB34N · pith_short_16: EDYBW6QTB34NZUBO · pith_short_8: EDYBW6QT

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/EDYBW6QTB34NZUBOOEC7GUL3YB \
  | 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: 20f01b7a130ef8dcd02e7105f3517bc07f0ef7227ef265218c480efd7a23f520

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fc9e109ebf7b3c48425b568eb02067494fbbc1f79305944b40df871e033f4f2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-01-10T08:44:36Z",
    "title_canon_sha256": "ec881e1ff653002128cec02d8be89a98d077812fc6008d319cf5172d11ab2f7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0301165",
    "kind": "arxiv",
    "version": 1
  }
}