Pith Number

pith:YAV4KWZU

pith:2010:YAV4KWZUN6FGYNLCACJGLH2FKE

not attested not anchored not stored refs pending

The Mass and Radius of the Neutron Star in 4U 1820-30

Feryal Ozel, Larry Camarota, Patricia Wroblewski, Tolga Guver

arxiv:1002.3825 v2 · 2010-02-19 · 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{YAV4KWZUN6FGYNLCACJGLH2FKE}

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	2026-05-18T04:42:36.136582Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c02bc55b346f8a6c35620092659f45512c76883f30923c80b3b396d60af8bab2

Aliases

arxiv: 1002.3825 · arxiv_version: 1002.3825v2 · doi: 10.48550/arxiv.1002.3825 · pith_short_12: YAV4KWZUN6FG · pith_short_16: YAV4KWZUN6FGYNLC · pith_short_8: YAV4KWZU

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/YAV4KWZUN6FGYNLCACJGLH2FKE \
  | 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: c02bc55b346f8a6c35620092659f45512c76883f30923c80b3b396d60af8bab2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7d6e245100f88b3d6d8d3c00dabfad926799527c4fa8d937e813230404d41b9",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2010-02-19T21:04:48Z",
    "title_canon_sha256": "8fe50d34dd1e5a3a1369d00d80026aab1b263fcd41507e8f462105344dc5ec7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.3825",
    "kind": "arxiv",
    "version": 2
  }
}