Pith Number

pith:YQSPJ7UC

pith:2012:YQSPJ7UCCJBPADEQVNOQPHWVYM

not attested not anchored not stored refs pending

BK Lyncis: The Oldest Old Nova?... And a Bellwether for Cataclysmic-Variable Evolution

(2) Univ. de Huelva, (3) Center for Backyard Astrophysics, (4) King's Univ. Coll.), Anthony Kroes (3), Arto Oksanen (3), Brian Martin (4), David Boyd (3), David Cejudo (3), David Harvey (3), David Skillman (3), Enrique de Miguel (2), Etienne Morelle (3), Franz-Josef Hambsch (3), George Roberts (3), Helena Uthas (1), Jerry Foote (3), John Rock (3), Jonathan Kemp (1), Joseph Patterson (1), Joseph Ulowetz (3), Lasse Jensen (3) ((1) Columbia Univ., Richard Sabo (3), Robert Koff (3), Shawn Dvorak (3), Thomas Krajci (3), Tonny Vanmunster (3), Tut Campbell (3)

arxiv:1212.5836 v1 · 2012-12-23 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YQSPJ7UCCJBPADEQVNOQPHWVYM}

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	2026-05-18T01:52:28.820763Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c424f4fe821242f00c90ab5d079ed5c33a6ecb898b142e3ff0f6c662f918c79a

Aliases

arxiv: 1212.5836 · arxiv_version: 1212.5836v1 · doi: 10.48550/arxiv.1212.5836 · pith_short_12: YQSPJ7UCCJBP · pith_short_16: YQSPJ7UCCJBPADEQ · pith_short_8: YQSPJ7UC

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/YQSPJ7UCCJBPADEQVNOQPHWVYM \
  | 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: c424f4fe821242f00c90ab5d079ed5c33a6ecb898b142e3ff0f6c662f918c79a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40c200398001109f76a42281908ae0158c51e5d43bceb3ff14645d1ec3ef55b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-12-23T21:25:26Z",
    "title_canon_sha256": "4b5a38520e55fe18bf174b735e1c417f4dda46630560eed9234ba11c3496c13b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.5836",
    "kind": "arxiv",
    "version": 1
  }
}