Pith Number

pith:ZKCS2GCB

pith:2007:ZKCS2GCBNXKR7NIIKIVOCMRHID

not attested not anchored not stored refs pending

Spectral and Rotational Changes in the Isolated Neutron Star RX J0720.4-3125

David L. Kaplan (MIT), George G. Pavlov (Penn. State), Kaya Mori (U. Toronto), Marten H. van Kerkwijk (U. Toronto)

arxiv:astro-ph/0703326 v1 · 2007-03-13 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZKCS2GCBNXKR7NIIKIVOCMRHID}

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	2026-05-18T02:40:24.837278Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca852d18416dd51fb508522ae1322740c565f09f551830d1337636875c0a27fb

Aliases

arxiv: astro-ph/0703326 · arxiv_version: astro-ph/0703326v1 · doi: 10.48550/arxiv.astro-ph/0703326 · pith_short_12: ZKCS2GCBNXKR · pith_short_16: ZKCS2GCBNXKR7NII · pith_short_8: ZKCS2GCB

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/ZKCS2GCBNXKR7NIIKIVOCMRHID \
  | 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: ca852d18416dd51fb508522ae1322740c565f09f551830d1337636875c0a27fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05e7dc9c561d0667dff5549b869ee2e68ed12a9900dd43a4486c5e69a1728a93",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-03-13T17:06:17Z",
    "title_canon_sha256": "ed1b304d0919654c9f52b9f6a580bf10d9fb7cbd6ae2e6595b88206e39cde7a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0703326",
    "kind": "arxiv",
    "version": 1
  }
}