Pith Number

pith:ZQGEQXDT

pith:2009:ZQGEQXDTYSKWK7B23MH3JBB77P

not attested not anchored not stored refs pending

A Universal Decline Law of Classical Novae. IV. V838 Her (1991): A Very Massive White Dwarf

Angelo Cassatella (INAF, Istituto di Fisica dello Spazio Interplanetario), Izumi Hachisu (Univ. of Tokyo), Mariko Kato (Keio Univ.)

arxiv:0909.1506 v1 · 2009-09-08 · 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{ZQGEQXDTYSKWK7B23MH3JBB77P}

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	2026-05-18T02:34:30.793805Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc0c485c73c495657c3adb0fb4843ffbf0a65e658bc42c40b8c93187663fa400

Aliases

arxiv: 0909.1506 · arxiv_version: 0909.1506v1 · doi: 10.48550/arxiv.0909.1506 · pith_short_12: ZQGEQXDTYSKW · pith_short_16: ZQGEQXDTYSKWK7B2 · pith_short_8: ZQGEQXDT

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/ZQGEQXDTYSKWK7B23MH3JBB77P \
  | 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: cc0c485c73c495657c3adb0fb4843ffbf0a65e658bc42c40b8c93187663fa400

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3a86b2f050a627a616e3e3fc5a4751a127064b52ecd419bc8ff1fb627d9b96b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-08T15:03:31Z",
    "title_canon_sha256": "ae845ab7949173636f9bac8b115f99c3d5c59cc5cb405bd1afcfc147badacf89"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1506",
    "kind": "arxiv",
    "version": 1
  }
}