Pith Number

pith:Q5STNBQ7

pith:2025:Q5STNBQ7GJ3FXSBK2DYP73J4PF

not attested not anchored not stored refs pending

Red Supergiants -- The Other Side of the H-R Diagram

Roberta M. Humphreys

arxiv:2507.15965 v1 · 2025-07-21 · 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{Q5STNBQ7GJ3FXSBK2DYP73J4PF}

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	2026-07-05T11:41:00.004494Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

876536861f32765bc82ad0f0ffed3c79503395a68e0d1489f5277cab832b6098

Aliases

arxiv: 2507.15965 · arxiv_version: 2507.15965v1 · doi: 10.48550/arxiv.2507.15965 · pith_short_12: Q5STNBQ7GJ3F · pith_short_16: Q5STNBQ7GJ3FXSBK · pith_short_8: Q5STNBQ7

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/Q5STNBQ7GJ3FXSBK2DYP73J4PF \
  | 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: 876536861f32765bc82ad0f0ffed3c79503395a68e0d1489f5277cab832b6098

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8acee939686558d1b3c972d3cb0fee5aca68ef553a41e16b2e0d51d2d428aa14",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2025-07-21T18:05:03Z",
    "title_canon_sha256": "9dd4abb6c3648a4a64f9fe75b9063df4fa2a1194690f4c2c9d4475f1430c4b49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.15965",
    "kind": "arxiv",
    "version": 1
  }
}