Pith Number

pith:SLGD23QA

pith:2026:SLGD23QAQF5YF4ERKVFY423XFA

not attested not anchored not stored refs pending

The mass of the neutron star in 4U 1820-30 revisited

Bianca B Martins, Davi V Rodrigues, Guilherme R C Sampaio, Jorge E Horvath, L\'ivia S Rocha, Lucas G Bar\~ao, Lucas M de S\'a, Marcio G B de Avellar, Nathalia D Pires, Rachel M Takahashi

arxiv:2606.02828 v1 · 2026-06-01 · 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{SLGD23QAQF5YF4ERKVFY423XFA}

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	2026-06-03T01:05:24.039102Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92cc3d6e00817b82f091554b8e6b77280d98319467037f30f7c60ad171c7d912

Aliases

arxiv: 2606.02828 · arxiv_version: 2606.02828v1 · doi: 10.48550/arxiv.2606.02828 · pith_short_12: SLGD23QAQF5Y · pith_short_16: SLGD23QAQF5YF4ER · pith_short_8: SLGD23QA

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/SLGD23QAQF5YF4ERKVFY423XFA \
  | 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: 92cc3d6e00817b82f091554b8e6b77280d98319467037f30f7c60ad171c7d912

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b28f48c5e0cb9d1d7081dd42c43e48e42fafedf6e0c7bd3022589e8b18f966c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-06-01T19:44:22Z",
    "title_canon_sha256": "35287b2a909868cf221a893df19a8b9a1e5941ba1cda7ec863809e4ab1d0956a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.02828",
    "kind": "arxiv",
    "version": 1
  }
}