Pith Number

pith:Z65VZ7ZT

pith:2009:Z65VZ7ZTTVGQKUO2II4M5YFRAJ

not attested not anchored not stored refs pending

Cepheids and Long Period Variables in M33

Andrew K. Bradshaw, Anne Pellerin, Krzysztof Z. Stanek, Lucas M. Macri

arxiv:0907.4995 v1 · 2009-07-28 · 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{Z65VZ7ZTTVGQKUO2II4M5YFRAJ}

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	2026-05-18T02:12:46.885407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfbb5cff339d4d0551da4238cee0b10240ff2a679025dc39df0fad69cafbced8

Aliases

arxiv: 0907.4995 · arxiv_version: 0907.4995v1 · doi: 10.48550/arxiv.0907.4995 · pith_short_12: Z65VZ7ZTTVGQ · pith_short_16: Z65VZ7ZTTVGQKUO2 · pith_short_8: Z65VZ7ZT

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/Z65VZ7ZTTVGQKUO2II4M5YFRAJ \
  | 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: cfbb5cff339d4d0551da4238cee0b10240ff2a679025dc39df0fad69cafbced8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2d5707629473c07fac196e1abf950bb2201df76ca8db3916f54c13cddf4814f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-07-28T20:34:49Z",
    "title_canon_sha256": "e62c270617a4ee947fd52880569cad271995e510dfcba89d87c3a141f3426a7d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4995",
    "kind": "arxiv",
    "version": 1
  }
}