Pith Number

pith:L2ODPQOX

pith:2009:L2ODPQOXCRLUOE4DEC5RSPYJHR

not attested not anchored not stored refs pending

Remarkable Spectral Variability of PDS 456

Ehud Behar, James Reeves, Paul T. O'Brien, Richard Mushotzky, Shai Kaspi, T.J. Turner

arxiv:0912.4946 v1 · 2009-12-25 · 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{L2ODPQOXCRLUOE4DEC5RSPYJHR}

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	2026-05-18T02:33:55.356184Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5e9c37c1d7145747138320bb193f093c42a8c062381816bc28901c86c66bd964

Aliases

arxiv: 0912.4946 · arxiv_version: 0912.4946v1 · doi: 10.48550/arxiv.0912.4946 · pith_short_12: L2ODPQOXCRLU · pith_short_16: L2ODPQOXCRLUOE4D · pith_short_8: L2ODPQOX

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/L2ODPQOXCRLUOE4DEC5RSPYJHR \
  | 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: 5e9c37c1d7145747138320bb193f093c42a8c062381816bc28901c86c66bd964

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94afb7456382c668e5a6617a5b2e43f0bb6078a4cde30034fa001d1f1e147586",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-25T07:51:23Z",
    "title_canon_sha256": "3d19f596e862f29725fcc6192c482e8136cc59da37d55eaefa41794bdd22d8b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4946",
    "kind": "arxiv",
    "version": 1
  }
}