Pith Number

pith:67JD5ZEO

pith:2009:67JD5ZEON6B4ZJMG7JW5PWNEUX

not attested not anchored not stored refs pending

Multiwavelength periodicity study of Markarian 501

Constanze Roedig, Felix Spanier, Oliver Elbracht, Thomas Burkart

arxiv:0904.4392 v2 · 2009-04-28 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{67JD5ZEON6B4ZJMG7JW5PWNEUX}

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	2026-05-18T02:13:56.674356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7d23ee48e6f83cca586fa6dd7d9a4a5c78d797e44c979bf61a06da6f277a0b9

Aliases

arxiv: 0904.4392 · arxiv_version: 0904.4392v2 · doi: 10.48550/arxiv.0904.4392 · pith_short_12: 67JD5ZEON6B4 · pith_short_16: 67JD5ZEON6B4ZJMG · pith_short_8: 67JD5ZEO

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/67JD5ZEON6B4ZJMG7JW5PWNEUX \
  | 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: f7d23ee48e6f83cca586fa6dd7d9a4a5c78d797e44c979bf61a06da6f277a0b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db1f531332091f751b2d77bd6e0bd73ae2d5ff354e03123073b221f254673bf1",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-28T13:24:04Z",
    "title_canon_sha256": "cc4225c5dcea3048931372cf9f74385e493e99dcf857c1d4e562646f157c7c17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4392",
    "kind": "arxiv",
    "version": 2
  }
}