Pith Number

pith:W6MHSGT2

pith:2004:W6MHSGT2INXOYAI5PEZZAQ3BBU

not attested not anchored not stored refs pending

WR20a: a massive cornerstone binary system comprising two extreme early-type stars

E. Gosset, G. Rauw, H. Sana, J.-M. Vreux, K.A. van der Hucht, M. De Becker, P.A. Crowther, P.M. Williams, Y. Naze

arxiv:astro-ph/0404551 v1 · 2004-04-28 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W6MHSGT2INXOYAI5PEZZAQ3BBU}

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	2026-07-04T16:43:39.700523Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b798791a7a436eec011d79339043610d3ad466da5774bb06fd6d997e950b5852

Aliases

arxiv: astro-ph/0404551 · arxiv_version: astro-ph/0404551v1 · doi: 10.48550/arxiv.astro-ph/0404551 · pith_short_12: W6MHSGT2INXO · pith_short_16: W6MHSGT2INXOYAI5 · pith_short_8: W6MHSGT2

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/W6MHSGT2INXOYAI5PEZZAQ3BBU \
  | 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: b798791a7a436eec011d79339043610d3ad466da5774bb06fd6d997e950b5852

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "264992d0b50096622ce449f8388e8f6461d9a699088a2e8c70629360c71cf637",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-04-28T08:02:06Z",
    "title_canon_sha256": "ac7210f7c1efff4699d4d6f897a97cb356847bc07fbf47f0c2402c42148eba2e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0404551",
    "kind": "arxiv",
    "version": 1
  }
}