Pith Number

pith:UGELHMCH

pith:2019:UGELHMCHUE6SGKI3SIWOWQFUGK

not attested not anchored not stored refs pending

The ultracool helium-atmosphere white dwarf companion of PSR J0740+6620?

A. Cabrera-Lavers, A. V. Karpova, A. Yu. Kirichenko, D. A. Zyuzin, D. M. Beronya, S. V. Zharikov, Yu. A. Shibanov

arxiv:1902.11150 v1 · 2019-02-28 · astro-ph.SR · 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{UGELHMCHUE6SGKI3SIWOWQFUGK}

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	2026-05-17T23:52:21.198676Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a188b3b047a13d23291b922ceb40b432ad7f5650d79bac09c08036bdde5f052e

Aliases

arxiv: 1902.11150 · arxiv_version: 1902.11150v1 · doi: 10.48550/arxiv.1902.11150 · pith_short_12: UGELHMCHUE6S · pith_short_16: UGELHMCHUE6SGKI3 · pith_short_8: UGELHMCH

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/UGELHMCHUE6SGKI3SIWOWQFUGK \
  | 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: a188b3b047a13d23291b922ceb40b432ad7f5650d79bac09c08036bdde5f052e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "451d91c348be7d57ae7b20b4c3c4b2523408bfddce0d01f9e81c061c6997eceb",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-02-28T15:28:58Z",
    "title_canon_sha256": "8ecfe357111d464deb2f513af94483671434bce0b4bc283448de85f750b8c23c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.11150",
    "kind": "arxiv",
    "version": 1
  }
}