Pith Number

pith:HP7DK4NK

pith:2020:HP7DK4NKN6UUOQR7ZQYBYFJIGC

not attested not anchored not stored refs pending

Spectroscopic characterization of the known O-star population in Cygnus OB2. Evidence of multiple star-forming bursts

A. Herrero, A. Pasquali, A. Peller\'in, A. Sota, D. J. Lennon, F. Comer\'on, J. Ma\'iz Apell\'aniz, S. R. Berlanas, S. Sim\'on-D\'iaz

arxiv:2008.09917 v3 · 2020-08-22 · 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{HP7DK4NKN6UUOQR7ZQYBYFJIGC}

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	2026-07-05T01:44:18.408475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bfe3571aa6fa947423fcc301c1528309ced7c891b5eed1e96835cd30f39b459

Aliases

arxiv: 2008.09917 · arxiv_version: 2008.09917v3 · doi: 10.48550/arxiv.2008.09917 · pith_short_12: HP7DK4NKN6UU · pith_short_16: HP7DK4NKN6UUOQR7 · pith_short_8: HP7DK4NK

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/HP7DK4NKN6UUOQR7ZQYBYFJIGC \
  | 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: 3bfe3571aa6fa947423fcc301c1528309ced7c891b5eed1e96835cd30f39b459

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7181cc5227c58d43720b57edff1ee22f1c27de1ad38ccffcad037f8008267d5",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-08-22T21:55:12Z",
    "title_canon_sha256": "ba29a0853ff4463c41e07d145ae780108fc7288348f46843302f22d9b541cde8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.09917",
    "kind": "arxiv",
    "version": 3
  }
}