Pith Number

pith:EG5PQ4TY

pith:2017:EG5PQ4TYLXKPZ7PUWA32XYK7FJ

not attested not anchored not stored refs pending

Luminous and Variable Stars in M31 and M33 V. The Upper HR Diagram

David Hahn, John C. Martin, Kerstin Weis, Kris Davidson, Roberta M. Humphreys

arxiv:1707.01916 v1 · 2017-07-06 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EG5PQ4TYLXKPZ7PUWA32XYK7FJ}

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	2026-05-18T00:39:31.014076Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21baf872785dd4fcfdf4b037abe15f2a5983064a3468215edd41ba81bfbc0a3d

Aliases

arxiv: 1707.01916 · arxiv_version: 1707.01916v1 · doi: 10.48550/arxiv.1707.01916 · pith_short_12: EG5PQ4TYLXKP · pith_short_16: EG5PQ4TYLXKPZ7PU · pith_short_8: EG5PQ4TY

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/EG5PQ4TYLXKPZ7PUWA32XYK7FJ \
  | 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: 21baf872785dd4fcfdf4b037abe15f2a5983064a3468215edd41ba81bfbc0a3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44e4b38b1c9a47c509812b1634b1e43b96cb79ec6541bbe5846be9b6279bb98a",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-07-06T18:01:07Z",
    "title_canon_sha256": "59e564a7238a2aad1ce710958bdb93c3d5699431528304d689db7e6dfb03100a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.01916",
    "kind": "arxiv",
    "version": 1
  }
}