Pith Number

pith:7H6FAFJW

pith:2026:7H6FAFJWCCBPOE57KTOCPGYSWH

not attested not anchored not stored refs pending

Massive Stars in the Thirties: awaiting new Hubble discoveries

Aida Wofford, Andreas A.C. Sander, Lidia M. Oskinova, Miriam Garcia, Sergio Sim\'on-D\'iaz, Sylvia Ekstr\"om, Takashi Moriya

arxiv:2605.28972 v1 · 2026-05-27 · astro-ph.IM · astro-ph.GA · 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{7H6FAFJWCCBPOE57KTOCPGYSWH}

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	2026-05-29T01:04:42.072011Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9fc5015361082f713bf54dc279b12b1c0f9cf037bd6a379db990669f4f5e404

Aliases

arxiv: 2605.28972 · arxiv_version: 2605.28972v1 · doi: 10.48550/arxiv.2605.28972 · pith_short_12: 7H6FAFJWCCBP · pith_short_16: 7H6FAFJWCCBPOE57 · pith_short_8: 7H6FAFJW

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/7H6FAFJWCCBPOE57KTOCPGYSWH \
  | 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: f9fc5015361082f713bf54dc279b12b1c0f9cf037bd6a379db990669f4f5e404

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2455b767f327f269485edb7eb2658ab5dd2424f7618f28cecf45187986cb580",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2026-05-27T18:22:16Z",
    "title_canon_sha256": "9682820eaa77961be658ce406635431a235af53afe0e610680b1e32b645a7cee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.28972",
    "kind": "arxiv",
    "version": 1
  }
}