Pith Number

pith:UP3CALMT

pith:2018:UP3CALMT5KFPOIP5CYDQGS3MUA

not attested not anchored not stored refs pending

High precision pulsar timing and spin frequency second derivatives

B. W. Stappers, C. G. Bassa, X. J. Liu

arxiv:1805.02892 v1 · 2018-05-08 · 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{UP3CALMT5KFPOIP5CYDQGS3MUA}

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	2026-05-18T00:15:13.582234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3f6202d93ea8af721fd1607034b6ca01c65e0cb4176a11d01863666f4d70255

Aliases

arxiv: 1805.02892 · arxiv_version: 1805.02892v1 · doi: 10.48550/arxiv.1805.02892 · pith_short_12: UP3CALMT5KFP · pith_short_16: UP3CALMT5KFPOIP5 · pith_short_8: UP3CALMT

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/UP3CALMT5KFPOIP5CYDQGS3MUA \
  | 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: a3f6202d93ea8af721fd1607034b6ca01c65e0cb4176a11d01863666f4d70255

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2dc6949896063488ca0f0029ac45c4f33f7aebed62a440f4b642304f65a7bf2a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-05-08T08:26:51Z",
    "title_canon_sha256": "1dcccaf603c6d610ae77f131076f07a477930aab1e88431ff93ec4d8b14f5fba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.02892",
    "kind": "arxiv",
    "version": 1
  }
}