Pith Number

pith:Q2752SS7

pith:2017:Q2752SS7HKYVAMOH7D6ULCQQFE

not attested not anchored not stored refs pending

Characterizing the stellar population of NGC 1980

Lee Hartmann, Marina Kounkel, Nuria Calvet, Tom Megeath

arxiv:1705.07922 v1 · 2017-05-22 · 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{Q2752SS7HKYVAMOH7D6ULCQQFE}

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	2026-05-18T00:40:57.576855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86bfdd4a5f3ab15031c7f8fd458a102929d4ec79caba4666ae637b4880aecd42

Aliases

arxiv: 1705.07922 · arxiv_version: 1705.07922v1 · doi: 10.48550/arxiv.1705.07922 · pith_short_12: Q2752SS7HKYV · pith_short_16: Q2752SS7HKYVAMOH · pith_short_8: Q2752SS7

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/Q2752SS7HKYVAMOH7D6ULCQQFE \
  | 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: 86bfdd4a5f3ab15031c7f8fd458a102929d4ec79caba4666ae637b4880aecd42

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b56aae397c818cefac61e7c621b9a67a2b0ef051e6fb5435e05a101ea1766e7",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-05-22T18:04:50Z",
    "title_canon_sha256": "60e1d7b05354bbf459b6272f029be9feea581cbbf1def01ddea3b9a3aca3528a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.07922",
    "kind": "arxiv",
    "version": 1
  }
}