Pith Number

pith:EIL634CJ

pith:2012:EIL634CJS7DTIG6PZIWJQRXD4W

not attested not anchored not stored refs pending

Discovery of a compact companion to the hot subdwarf star BD+37 442

2), (2) IUSS Pavia, (3) INAF/OA Cagliari), A. Tiengo (1, N. La Palombara (1), P. Esposito (3) ((1) INAF/IASF Milano, S. Mereghetti (1)

arxiv:1204.3519 v1 · 2012-04-16 · 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{EIL634CJS7DTIG6PZIWJQRXD4W}

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	2026-05-18T01:57:51.984213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2217edf04997c7341bcfca2c9846e3e584d43473b88a44c105d15f84da2f037e

Aliases

arxiv: 1204.3519 · arxiv_version: 1204.3519v1 · doi: 10.48550/arxiv.1204.3519 · pith_short_12: EIL634CJS7DT · pith_short_16: EIL634CJS7DTIG6P · pith_short_8: EIL634CJ

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/EIL634CJS7DTIG6PZIWJQRXD4W \
  | 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: 2217edf04997c7341bcfca2c9846e3e584d43473b88a44c105d15f84da2f037e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e98fa854fb250c20fa88cb66b3293efc468b1ba7674f75c6d50acc0fa79f0fd3",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-04-16T15:19:56Z",
    "title_canon_sha256": "9fa8a0073a490ffa51c4a46b2711292e96f76333e2561b9aa300521ceefca12f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.3519",
    "kind": "arxiv",
    "version": 1
  }
}