Pith Number

pith:VP6CIKGJ

pith:2018:VP6CIKGJANO3YFZNFJGQMHMYE4

not attested not anchored not stored refs pending

The luminosities of cool supergiants in the Magellanic Clouds, and the Humphreys-Davidson limit revisited

Ben Davies (Liverpool JMU), Emma R. Beasor (Liverpool JMU), Paul A. Crowther (Sheffield)

arxiv:1804.06417 v1 · 2018-04-17 · 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{VP6CIKGJANO3YFZNFJGQMHMYE4}

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	2026-05-18T00:14:13.754938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abfc2428c9035dbc172d2a4d061d98273c873bf1cc8c0889fa7abe19612e52b3

Aliases

arxiv: 1804.06417 · arxiv_version: 1804.06417v1 · doi: 10.48550/arxiv.1804.06417 · pith_short_12: VP6CIKGJANO3 · pith_short_16: VP6CIKGJANO3YFZN · pith_short_8: VP6CIKGJ

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/VP6CIKGJANO3YFZNFJGQMHMYE4 \
  | 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: abfc2428c9035dbc172d2a4d061d98273c873bf1cc8c0889fa7abe19612e52b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "245f702ada14edfb69faf91169eb68622e2f3dfeab8246e2f3cca0030fb7ffd6",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-04-17T18:00:37Z",
    "title_canon_sha256": "fa5b04baee6f5a2fb8f7477ddf48ec26f68a408f2f652b647debeefdaab04659"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.06417",
    "kind": "arxiv",
    "version": 1
  }
}