Pith Number

pith:4QPD4TWE

pith:2016:4QPD4TWESWTJ5OCBVVTO3QUQKO

not attested not anchored not stored refs pending

The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems

A. Herrero, A. Marco, A. Sota, E. J. Alfaro, I. Negueruela, J. I. Arias, J. Ma\'iz Apell\'aniz, J. R. S. Le\~ao, N. R. Walborn, R. C. Gamen, R. H. Barb\'a, S. Sim\'on-D\'iaz

arxiv:1602.01336 v2 · 2016-02-03 · 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{4QPD4TWESWTJ5OCBVVTO3QUQKO}

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	2026-05-18T01:13:55.804219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e41e3e4ec495a69eb841ad66edc29053931b722e8bafd0b14eecf91d42bc87e3

Aliases

arxiv: 1602.01336 · arxiv_version: 1602.01336v2 · doi: 10.48550/arxiv.1602.01336 · pith_short_12: 4QPD4TWESWTJ · pith_short_16: 4QPD4TWESWTJ5OCB · pith_short_8: 4QPD4TWE

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/4QPD4TWESWTJ5OCBVVTO3QUQKO \
  | 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: e41e3e4ec495a69eb841ad66edc29053931b722e8bafd0b14eecf91d42bc87e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff8571738efa805a53e1a474b342ec23b8289fa51e424ff076f97ae59e44cb78",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-02-03T15:25:18Z",
    "title_canon_sha256": "b86e3dd3e9ac09bd0ef57be83668797026008c301d9a017112b808aa8461f040"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.01336",
    "kind": "arxiv",
    "version": 2
  }
}