Pith Number

pith:YGOWNW52

pith:2020:YGOWNW52TTVNILQODPQIH6GE4Y

not attested not anchored not stored refs pending

On the formation of PSR J1640+2224: a neutron star born massive?

Xiang-Dong Li, Yong Shao, Zhi-Fu Gao, Zhu-Ling Deng

arxiv:2002.12583 v1 · 2020-02-28 · astro-ph.HE · 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{YGOWNW52TTVNILQODPQIH6GE4Y}

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	2026-07-05T00:50:16.047179Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c19d66dbba9cead42e0e1be083f8c4e60dd59bb0c9799310e3526587a96d1010

Aliases

arxiv: 2002.12583 · arxiv_version: 2002.12583v1 · doi: 10.48550/arxiv.2002.12583 · pith_short_12: YGOWNW52TTVN · pith_short_16: YGOWNW52TTVNILQO · pith_short_8: YGOWNW52

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/YGOWNW52TTVNILQODPQIH6GE4Y \
  | 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: c19d66dbba9cead42e0e1be083f8c4e60dd59bb0c9799310e3526587a96d1010

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de2bef2b52a79a8b5fcc19ed16ce962293361e6303f93c63ff22554c15e07991",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-02-28T07:45:02Z",
    "title_canon_sha256": "6a7b3a3184b9998b0c037b3e58e5e05e93fea6a9ff2070245236e4c144f9a1a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.12583",
    "kind": "arxiv",
    "version": 1
  }
}